T430 with two 500 GB HDD : RAID ?
Hi people,
My question is on the title :
Given a T430 with a 500 GB primary disk and an additional 500 GB instead of the optical drive, is it possible to configure the BIOS to set a RAID 0 or RAID 1 mode between these two HDD ?
Thanks.
JDAY has it right. You really want an SSD for your boot and programs disk and a hard drive of whatever size you like as the data drive. RAID is old technology and for performance is obsolete.
T61p, T400
formerly x23, x40
Similar Messages
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Can I put a 500 gb hdd in a T61
I have a T61 running XP PRO with a 100 gb hdd. Can I replace that with a 500 gb hdd. BIOS shows the correct drive model. When I boot off a Windows cd, the drive is visable. When I boot off a Ghost cd, I can copy an image to the drive, but the drive won't boot. I've tried Windows repair and chkdsk.
kprice, welcome to the forum,
hopefully you'll find your solution in this thread and the threads linked to from it. Capturing the boot sectors using the -ib switch is critical.
Hope this helps
Andy ______________________________________
Please remember to come back and mark the post that you feel solved your question as the solution, it earns the member + points
Did you find a post helpfull? You can thank the member by clicking on the star to the left awarding them Kudos Please add your type, model number and OS to your signature, it helps to help you. Forum Search Option T430 2347-G7U W8 x64, Yoga 10 HD+, Tablet 1838-2BG, T61p 6460-67G W7 x64, T43p 2668-G2G XP, T23 2647-9LG XP, plus a few more. FYI Unsolicited Personal Messages will be ignored.
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PepperonI blog -
Replacing Drive with a 500 gig 5400 RMP Drive
I have a 2008 macbook pro with a 200 gig drive. I would like to replace it with a 500 gig 5400 RMP drive.
Q: Does anyone have any favorites that:
1 - fit inside correctly (some models are the wrong size)
2 -DOES NOT have any of the recent drive firmware issues like:
http://discussions.apple.com/thread.jspa?messageID=9815826�
choices : Hitachi - Western digital - toshiba - samsung - seagate(? problems)revDAVE:
As far as I can tell the clicking issue is intermittent. If you get one that clicks, you can it exchanged under warranty.
The heat issue in 7200 rpm drives is a question people ask before they install a 7200 rpm HDD. (Incidentally, this question was raised about 5400 rpm drives when going from 4200 rpm drives.) I am not aware of any evidence that the 7200 rpm HDD is significantly hotter than 5400 rpm drives, and, as you may know, the perception of heat is often relative to the user. In any case, I would not worry about a heat issue with a 7200 rpm HDD.
As to which brand to buy, that is a tough call. Be sure that you buy a drive that does not have GForce that will interfere with the MBP's SMS system. Hitachi is usually a safe bet. Seagate makes excellent drives, but some people have complained about issues with the 500 GB HDD. Remember that whatever brand you buy there is a possibility that your drive may be defective. In the final analysis it's your decision.
cornelius -
Hello (hopefully someone can shed some light on my issue)
I own as above a MAC PRO (Early 2008) this has a RAID card installed along with two 15k.7 cheetah hdd (320gb) and a spare drive, (which i made a regular drive)
a while ago i had to replace the RAID card battery, so i did this, over a year later the same thing happened again, but as previous just left it and the system seemed fine for ages, until last night i was working in PHOTOSHOP and everything just froze and the screen kind of appeared GREEN, could not do a single thing. So restarted the mac, this time grey screen for ages and a message appeared, (macs version of blue screen) (see attached).
I restarted the machine and this time a flashing question mark folder!
could not do a thing.
so i found my copy of snow leopard and got the computer to run this and at least launch the DISK UTILITY and (Interestingly in the drop down menu RAID UTILITY was also in the menu) but it did not matter which utility i used the (RAID or DISK) neither could see any of drives, just the dvd drive.
so looked around on you tube and various forums and discovered if i take out the RAID CARD and re-plug the main lead from the RAID card back in to the LOGIC BOARD I would be reverting the MAC to a normal regular non-RAID computer.
After performing this HARDWARE task and inserting all three HDD, and running the DISK utility from the drop down menu via the SNOW LEOPARD disc.
(interestingly since the RAID card had been removed the RAID UTILITY from the drop down menu no longer appeared). running disk utility I can now only see the regular (spare) hdd and DVD Drive, but the two RAID HDD , again, still do not show up DISK UTILITY?
O.K. so i could chuck out the RAID card (AND RAID HDD) and just go with a regular set-up, and run a back restore from Time Machine on a NEW hdd purchased.
but what is wrong with the RAID, is the card at fault or are both HDD used for the RAID knackered? can i perform any tests, to see whats what?
thanks for your help in advanced.hello people, the issue was in fact the GRAPHICS card nothing to do with the HDD or RAID system ( although this did cause issues with the RAID system it basically lost its way) below is my replay to another similar problem some one else had!
working in photoshop and then everything stopped working and the lot froze! only option was to force shutdown (via button).
and try to restart, hoping all was fine, this was not the case :-(
I had the added issue of the RAID card system, that i have, this was confused to say the lease and would not behave or work, causing the start up to hang.
so i thought the HDD must be bust and the root cause. ( but soon learnt it was not the cause )
...bought a new HDD removed the RAID card and replugged the cable from RAID card into LOGIC board, ( making the computer act like any normal non-RAID system). I managed to install the OSX, using the snow leopard disk way. once the mac was running, i started to notice the screen would flicker and started to see 'artefacts'. so i started to reveal my symptoms to the web and forums and soon discovered that my graphics card could be the issue all along?.
(nvidia geforce 8800gt 2x dvi).
I read up on that a fix, could be either A. reply the thermal paste, as the card could be over heating or B. stick the card in the oven trick.
Tried option A. first and nothing still issues, so last night took the plunge carried out option B. and ta da it worked! i even managed to run
from my new HDD my lasted install OS X, absolutely fine. I then thought, maybe i could repair my RAID so replugged all the HARDWARD back in and
carried out a disk repair and disk permissions on drives( took a small amount of time), via the SNOW LEOPARD disc - (Disk utilities) and this worked and now have my system working as it was just over 6 days ago.
what was the cost to get this? bought a new hdd so 40.00gbp and thermal paste and cleaner kit ( your still need to do this ) search video card trick on you tube.
and renew thermal paste, approx 15.00gbp, technically i don't need the new HDD, but it was all part of the trial and error way i went. ( i do have extra storage as a result!)" -
Which is better, Raid 0 with two hdds or 1 ssd?
Hi,
I have a macbook pro Mid 2010 with two open hard drive bays (thanks to the mce optibay.) I was wondering if it would be better to put two caviar black hard drives in raid 0 on my macbook pro, or have one vertex 2 drive as a boot/applications drive and another data drive.
Thanks
SamI understood what the hard-drive-in-optibay meant. Regardless, it's still two platter-based hard drives versus an SSD. An SSD will be faster in your situation. If you had a lot of platter-drives in RAID0 and you had some sort of hardware based RAID controller with battery-backed cache, then maybe, possible, potentially, that (really expensive) platter-based RAID0 could be as fast as a SSD. You don't have that and can't put that in a notebook, so it ain't gonna happen for you.
Now add to the mix, the fact that RAID0 will lose data if any one of the drives in the array fails. You have two drives in RAID0 versus one drive in a non-RAID. The RAID is twice as likely to have a drive failure just because you have more drives. If you made the RAID from two SSD drives, which are more reliable than platter-based drives, then you're got something interesting. But you're still twice as likely to have a SSD-RAID0 array failure compared to a single non-RAID SSD. (And more than twice if it's platter-based drives in the RAID0 versus a single non-RAID SSD.) So it's up to you to determing how much risk you are willing to take...and how much you can afford.
Also note that some Macbook and Macbook Pro models have slower performance on the SATA port for the optical drive. (One assumes Apple tried to save a few dollars and put in a older, slower SATA controller for the optical drive.) I don't know exactly which models but if yours is one of those, then you may get uneven performance on your RAID0. Whether that is noticable or acceptable to you, will depend on a lot of things that you won't know until you try. (e.g.: model of drive, apps you're using.)
And it's good that "backup is easy for you." With RAID0 for the boot volume, you're that much more likely to have a failed boot volume. (IOW, can't boot the Mac at all, which means you'll be using that easily made backup a lot. ) Ideally, workstations that used RAID0 used them for the data, not for the OS. For example, in video editing, the scratch disk needs to be fast, but could be RAID0 because you "threw away" whatever was on the scratch disk after you were done editing, and presumably saved/copied the final edited product to another archival drive. But the OS was on a typical single drive non-RAID (or a RAID1 or RAID5 if necessary,) not on a single RAID0 array for both OS and data.
In your situation, you can't separate the OS and data onto separate RAID arrays, so in general, RAID0 is NOT what you want, regardless of whether you use SSDs or platter-based hard drives. But again, only you can determine how much risk and cost you're willing to gamble with. -
Software RAID-1 with two different drives
Hi,
I got a 2 TB Seagate Barracuda, which I am looking to mirror in a RAID-1 set-up. Now, since the space is filling rather fast, I suspect I'll have to keep adding disks to this machine in the future. So, I have a interest in changing to some low power (since its always on) drives.
So, I'm thinking of making the second disk a 2 TB Seagate NAS drive (and then use NAS drives from this point on), which is a fair bit slower than the main drive. Personally, I wouldn't expect this to be a problem at all, but I thought it would be best to check with others first though
Have anybody here tried running a RAID-1 where one disk is considerably slower than the other? Will this give any issues (other than the speed being limited by the slower disk)?WonderWoofy wrote:
The speed will certainly be limited by the slowest device, as you mentioned, but what I am confused about is what you expect to achieve by continually adding drives to a RAID-1? At some point, do you plan on changing the RAID level? Because RAID-1 is mirroring. If you add another drive, you will not get more space, you will just get another copy of your data... and another... and another.
I'm not sure that btrfs would be any easier in this case, as the mdadm tools are pretty robust and certainly allow for adding and removing drives. But if you use btrfs it might actually be beneficial if you are set on keeping a RAID-1 type setup. This is because btrfs' raid levels are not quite like traditional raid. If you put your btrfs array in a RAID-1 setup with two disks, it is no different. But when you add another disk, it will continue to keep just two copies. So if you have a total of four disks, then it will still be only two copies of any given data, meaning that you will end up with twice the space of the two disk RAID-1.
Maybe you are thinking of a different RAID level altogether? If speed is not the issue but you care about redundancy and fault tolerance, then you might want to look into RAID-5 or RAID-6, though these require quite a few disks.
Ello',
I'm continuously going to be adding drivers to the machine, not to the same raid-1 array. My plan is once space gets tight, I'll add another disk and bump it up to raid-5 -
Hi All,
I have the following situation. The Quality Management is running on MCS7835-H2 with Two Disk of 72-GB SAS in RAID 1 , Is it possible to have a 6 disk 146 GB in RAID 5. You would like add the new six drives as a new RAID 5 logical partition, and would like have to partition these drives in NT assigning new unique drive letters to these new partition(s).
I would like this:
---OS---------------------------------------space extra-----------
RAID 1 (Two Disk 72GB) and RAID 5 (Six Disk 146 GB)
how is that possible?
Anyone can help me?Actually, the default RAID level in the HP box is 1+0. If you put in 4 drives and make it into an array it will be what Cisco call RAID 10. If you put in two drives it will be RAID 1.
As Aaron says, you can put in more drives - there are 6 slots left.
Put in 6 similar drives and then open HP Array Configuration Utility.
It will see those physical devices and you can do what you like. You could make those 4 of those drives into a RAID 10, you could make all 6 of them into a RAID 5, or you could make all 6 into a huge space by choosing RAID 0 (no redundancy). Take your pick.
Once you have done that, right click on My Computer -> Manage -> Disk Management and make a new drive. Quick format or you will be there all day.
Regards,
Geoff -
How to Install Windows OS on a two partitioned internal HDD?
Hi
I have a late 2011 macbook pro 8,2 (MD318HN/A). A month ago, I installed Windows 7 using Bootcamp. For that I made a partition of 50 GB on my internal 500 GB HDD. After sometime in need of space, i formatted that 50 GB partition using Disk Utility in Mac OS Ext. (J).
Till this everything was fine.
Now I want to install Windows 8 Release Preview :
And now to install Windows 8 Release Preview, when i go to Bootcamp, it shows me an error that windows can be installed on a single partition HDD.
Trying format the internal HDD in one partition:
So i tried format the HDD of my MBP. In Lion Disk Recovery Mode (Cmd+R) using the Disk utility I tried to format the HDD but it gives me an error "Couldn't unmount the disk". I tried many a time but failed then re-installed the Mac OS X Lion from internet. Now that 50GB partition is showing in finder but still the error from Bootcamp exists when tried to install WIN 8.
So tell me what to do?
I have nothing in MBP to backup etc. So tell me any solution. I have arount 4-5Mbps download speed too.
Thank you.Download MiniTool Partition Wizard. The boot disk is free, and it contains all you need to delete all partitions on your drive. This same problem happened to me when I was tinkering with installing Windows 8 using EFI boot (incidentally, DON'T - Apple's EFI implementation is, to date, not compatible since it's partially proprietary).
The download link is: http://www.partitionwizard.com/partition-wizard-bootable-cd.html
You'll need a USB mouse, since the trackpad mouse wont work with this partiticular image, but it's the easiest tool to use from a user experience point of view, which is why I'm recommending it.
After you delete all partitions using this tool (and press apply) you can go ahead and restore OSX by any means you wish (internet recovery, dvd install etc.) -
Two VGA monitors don't work with two different G4s, but both work with G3!
I recently acquired two used Power Mac G4s (one of them is a mirrored-door dual-processor that I got from school and was told should work, the other is a Gigabit Ethernet model, and should also work), from two completely different sources. They both turn on (I get a power-on light, I hear HDDs churning, and I get a power chime from one of them, and they react to the usual Mac stimuli, mouse and keyboard light up, reset button works, etc.) but I get *absolutely no video*. The monitor syncs for a second, like it gets a quick signal, then goes immediately back to the "CHECK SIGNAL CABLE" message.
I have tried them both with two generic PC VGA monitors (though they were both kind of old and crummy ones, they work on my G3 and other computers. I've tried the working PCI video card from my G3, that doesn't work, nor does swapping their video cards. They both have Apple-supplied ATI AGP video cards, both with Apple's proprietary ADC interface, though one has only DVI out (with a DVI to VGA adapter that came with it) and the other has a straight VGA port.
The weird thing is that, even though these computers have never, er, met before, they have the exact same problem. The only thing these things have in common is the monitor I'm using. This leads me to believe
The only thing left I can think of is to hook them straight from the DVI port to my HDTV, but I don't have a DVI cable, much less know ANYTHING about DVI. Could it be that these particular VGA monitors don't like AGP video cards, or some sort of weird incompatibility that isn't well known?
I figure if anyone's seen something like this, you guys have. Here are the AppleHistory entries on these machines, if it helps:
http://apple-history.com/body.php?page=gallery&model=g4giga&performa=off&sort=da te&order=ASC
http://apple-history.com/body.php?page=gallery&model=g4_mirror&performa=off&sort =date&order=ASCThe software on the hard drives may be set for a video setting that won't work with your monitor. A few things to try (in order):
1) Reset PRAM. Hold down Cmd-Option-P-R when booting until you hear the third Boing.
2) Hold down Option when booting. Should show symbol of hard drive, plus a couple of arrows.
3) Boot from a CD (Install disk or, preferably, Hardware Test Disk).
4) Safe boot. Hold down "S" just after the boing. Release it when (if?) you see the turning gear.
If it is a scan rate problem, one of these should show some video. -
2 External Monitors with the T430s with Intel HD4000
I have read several multiple monitor threads but could not get a clear solution to this.
Model: I have a T430s with Intel HD4000 graphics.
Desired set up: 2 External Monitors + Lenovo LCD
Problem: It seems that I can only drive one external monitor. I'd like to drive two external monitors, as I did previously with my T420.
What I've tried: I have a dock and have tried VGA + DVI for the external monitors, as well as DVI + DVI. Neither setup has worked. It always greys out the third monitor in the Windows Display options.
Any thoughts on how to drive two external monitors with the T430s? Clarity is appreciated. Thank you!RobertWerner2 wrote:
If I'm reading the link you provided correctly, can I correctly assume that I CAN connect two external displays with just the W520 Laptop and NO docking station?
I tested this today. You can connect two external displays (1 VGA, 1 DisplayPort) without a docking station. The result is 3 independent displays - the ThinkPad LCD, the VGA monitor, and the DisplayPort monitor. -
Election problem after repeated split-brains with two nodes
Hi
I'm using a customized source based on BDB-5.1.19 (excxx_repquote)
with two site one - MASTER and the other SLAVE...
nsite=2
ack=quorum
- the master is writing to quotedb at a rate of 10 txn per sec
- the test consist to isolate the client from the master (split brain) and reconnect it after a random time include from 1sec to 10sec
the test run well about 10 times but at a moment the process slave receive DB_EVENT_REP_ELECTION_FAILED
and the master enter in election mode and never exit from the CLIENT mode. I must say that to freeze the client I decide to kill me (kill -9 my pid) when I receive such event...
here is the verbose log on the master...
[1307872770:871621][6510/47655809107168] MASTER: rep_send_function returned: 110
[1307872770:973655][6510/47655809107168] MASTER: bulk_msg: Send buffer after copy due to PERM
[1307872770:973667][6510/47655809107168] MASTER: send_bulk: Send 266 (0x10a) bulk buffer bytes
[1307872770:973672][6510/47655809107168] MASTER: /opt/bdb/ rep_send_message: msgv = 5 logv 17 gen = 68 eid -1, type bulk_log, LSN [21][986648] perm
[1307872770:973693][6510/47655809107168] MASTER: will await acknowledgement: need 1
[1307872771:26623][6510/47655809107168] MASTER: rep_send_function returned: 110
[1307872771:126380][6510/1162996032] MASTER: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 70 eid 0, type log, LSN [21][946345]
[1307872771:126407][6510/1162996032] MASTER: /opt/bdb/ rep_send_message: msgv = 5 logv 17 gen = 68 eid -1, type dupmaster, LSN [0][0] nobuf
[1307872771:126695][6510/1162996032] MASTER: rep_start: Found old version log 17
[1307872771:126753][6510/1162996032] CLIENT: /opt/bdb/ rep_send_message: msgv = 5 logv 17 gen = 68 eid -1, type newclient, LSN [0][0] nobuf
[1307872771:126833][6510/1183975744] CLIENT: starting election thread
[1307872771:126876][6510/1183975744] CLIENT: Start election nsites 2, ack 1, priority 100
[1307872771:126890][6510/1183975744] CLIENT: Election thread owns egen 69
[1307872771:127423][6510/1173485888] CLIENT: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 70 eid 0, type newclient, LSN [0][0]
[1307872771:130079][6510/1183975744] CLIENT: Tallying VOTE1[0] (2147483647, 69)
[1307872771:130113][6510/1183975744] CLIENT: Beginning an election
[1307872771:130134][6510/1183975744] CLIENT: /opt/bdb/ rep_send_message: msgv = 5 logv 17 gen = 68 eid -1, type vote1, LSN [21][986728] nobuf
[1307872771:130147][6510/1173485888] CLIENT: /opt/bdb/ rep_send_message: msgv = 5 logv 17 gen = 68 eid -1, type master_req, LSN [0][0] nobuf
[1307872771:130438][6510/1152506176] CLIENT: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 70 eid 0, type vote1, LSN [21][946437]
[1307872771:130460][6510/1162996032] CLIENT: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 70 eid 0, type alive, LSN [21][986728]
[1307872771:130467][6510/1152506176] CLIENT: Updating gen from 68 to 70
[1307872771:130482][6510/1162996032] CLIENT: Received ALIVE egen of 71, mine 69
[1307872771:130503][6510/1162996032] CLIENT: Election finished in 0.003602000 sec
[1307872771:130515][6510/1162996032] CLIENT: Election done; egen 70
[1307872771:130534][6510/1152506176] CLIENT: Received vote1 egen 71, egen 71
[1307872771:130581][6510/1152506176] CLIENT: Tallying VOTE1[0] (0, 71)
[1307872771:130593][6510/1089075520] CLIENT: starting election thread
[1307872771:130619][6510/1152506176] CLIENT: Incoming vote: (eid)0 (pri)100 ELECTABLE (gen)70 (egen)71 [21,946437]
[1307872771:130642][6510/1152506176] CLIENT: Not in election, but received vote1 0x282c 0x8
[1307872771:130674][6510/1089075520] CLIENT: Start election nsites 2, ack 1, priority 100
[1307872771:130692][6510/1089075520] CLIENT: Election thread owns egen 71
[1307872771:130704][6510/1194465600] CLIENT: starting election thread
[1307872771:130733][6510/1194465600] CLIENT: Start election nsites 2, ack 1, priority 100
[1307872771:132922][6510/1089075520] CLIENT: Tallying VOTE1[1] (2147483647, 71)
[1307872771:132949][6510/1089075520] CLIENT: Accepting new vote
[1307872771:132958][6510/1089075520] CLIENT: Beginning an election
[1307872771:132973][6510/1089075520] CLIENT: /opt/bdb/ rep_send_message: msgv = 5 logv 17 gen = 70 eid -1, type vote1, LSN [21][986728] nobuf
[1307872771:132985][6510/1194465600] CLIENT: election thread is exiting
[1307872771:133012][6510/1089075520] CLIENT: Tallying VOTE2[0] (2147483647, 71)
[1307872771:133037][6510/1089075520] CLIENT: Counted my vote 1
[1307872771:133048][6510/1089075520] CLIENT: Skipping phase2 wait: already got 1 votes
[1307872771:133060][6510/1089075520] CLIENT: Got enough votes to win; election done; (prev) gen 70
[1307872771:133071][6510/1089075520] CLIENT: Election finished in 0.002367000 sec
[1307872771:133084][6510/1089075520] CLIENT: Election done; egen 72
[1307872771:133111][6510/1089075520] CLIENT: Ended election with 0, e_th 1, egen 72, flag 0x2a2c, e_fl 0x0, lo_fl 0x6
[1307872771:133170][6510/1173485888] CLIENT: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 70 eid 0, type alive, LSN [0][0]
[1307872771:133187][6510/1173485888] CLIENT: Racing replication msg lockout, ignore message.
[1307872771:173744][6510/1162996032] CLIENT: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 70 eid 0, type vote2, LSN [0][0]
[1307872771:173769][6510/1162996032] CLIENT: Racing replication msg lockout, ignore message.
[1307872771:231593][6510/1183975744] CLIENT: Ended election with 0, e_th 0, egen 72, flag 0x2a2c, e_fl 0x0, lo_fl 0x1c
[1307872771:231629][6510/1183975744] CLIENT: election thread is exiting
[1307872777:443794][6510/1131526464] CLIENT: init connection to site 2.0.0.210:12345 with result 115
[1307872971:644194][6510/1131526464] CLIENT: init connection to site 2.0.0.210:12345 with result 115
[1307873165:844583][6510/1131526464] CLIENT: init connection to site 2.0.0.210:12345 with result 115
[1307873360:44955][6510/1131526464] CLIENT: init connection to site 2.0.0.210:12345 with result 115
[1307873554:245347][6510/1131526464] CLIENT: init connection to site 2.0.0.210:12345 with result 115
[1307873748:445736][6510/1131526464] CLIENT: init connection to site 2.0.0.210:12345 with result 115
[1307873942:646117][6510/1131526464] CLIENT: init connection to site 2.0.0.210:12345 with result 115
[1307874136:846509][6510/1131526464] CLIENT: init connection to site 2.0.0.210:12345 with result 115
.... and infinite stay to this situation
My question is why the Master is suddenly transformed into CLIENT and why it's never returning to the MASTER
Thanks in advance ...
here is the log for the client
[1307872315:455113][1282/1181583680] MASTER: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 68 eid 0, type log, LSN [21][984396]
[1307872315:455134][1282/1160603968] MASTER: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 68 eid 0, type log, LSN [21][984483] perm
[1307872315:609962][1282/1181583680] MASTER: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 68 eid 0, type bulk_log, LSN [21][984733] perm
[1307872315:764958][1282/1181583680] MASTER: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 68 eid 0, type bulk_log, LSN [21][984986] perm
[1307872315:919962][1282/1181583680] MASTER: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 68 eid 0, type bulk_log, LSN [21][985238] perm
[1307872316:75018][1282/1181583680] MASTER: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 68 eid 0, type bulk_log, LSN [21][985491] perm
[1307872316:229959][1282/1181583680] MASTER: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 68 eid 0, type bulk_log, LSN [21][985741] perm
[1307872316:384949][1282/1181583680] MASTER: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 68 eid 0, type bulk_log, LSN [21][985993] perm
[1307872316:499899][1282/1181583680] MASTER: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 68 eid 0, type bulk_log, LSN [21][986141] perm
[1307872316:539895][1282/1181583680] MASTER: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 68 eid 0, type log, LSN [21][986221]
[1307872316:540078][1282/1171093824] MASTER: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 68 eid 0, type log, LSN [21][986307]
[1307872316:540100][1282/1160603968] MASTER: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 68 eid 0, type log, LSN [21][986394] perm
[1307872316:694950][1282/1171093824] MASTER: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 68 eid 0, type bulk_log, LSN [21][986648] perm
[1307872316:847349][1282/1129134400] MASTER: /opt/bdb/ rep_send_message: msgv = 5 logv 17 gen = 70 eid -1, type log, LSN [21][946345]
[1307872316:847698][1282/1171093824] MASTER: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 68 eid 0, type dupmaster, LSN [0][0]
[1307872316:847999][1282/1181583680] MASTER: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 68 eid 0, type newclient, LSN [0][0]
[1307872316:848168][1282/1171093824] MASTER: rep_start: Found old version log 17
[1307872316:848222][1282/1181583680] CLIENT: Racing replication msg lockout, ignore message.
[1307872316:848398][1282/1171093824] CLIENT: /opt/bdb/ rep_send_message: msgv = 5 logv 17 gen = 70 eid -1, type newclient, LSN [0][0] nobuf
[1307872316:848504][1282/1192073536] CLIENT: starting election thread
[1307872316:848542][1282/1192073536] CLIENT: Start election nsites 2, ack 1, priority 100
[1307872316:848566][1282/1192073536] CLIENT: Election thread owns egen 71
[1307872316:849634][1282/1192073536] CLIENT: Tallying VOTE1[0] (2147483647, 71)
[1307872316:849654][1282/1192073536] CLIENT: Beginning an election
[1307872316:849680][1282/1192073536] CLIENT: /opt/bdb/ rep_send_message: msgv = 5 logv 17 gen = 70 eid -1, type vote1, LSN [21][946437] nobuf
[1307872316:851403][1282/1160603968] CLIENT: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 68 eid 0, type vote1, LSN [21][986728]
[1307872316:851448][1282/1160603968] CLIENT: Received vote1 egen 69, egen 71
[1307872316:851470][1282/1160603968] CLIENT: Received old vote 69, egen 71, ignoring vote1
[1307872316:851481][1282/1160603968] CLIENT: /opt/bdb/ rep_send_message: msgv = 5 logv 17 gen = 70 eid 0, type alive, LSN [21][986728] nobuf
[1307872316:851538][1282/1171093824] CLIENT: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 68 eid 0, type master_req, LSN [0][0]
[1307872316:851558][1282/1171093824] CLIENT: /opt/bdb/ rep_send_message: msgv = 5 logv 17 gen = 70 eid 0, type alive, LSN [0][0] nobuf
[1307872316:854254][1282/1160603968] CLIENT: /opt/bdb/ rep_process_message: msgv = 5 logv 17 gen = 70 eid 0, type vote1, LSN [21][986728]
[1307872316:854275][1282/1160603968] CLIENT: Received vote1 egen 71, egen 71
[1307872316:854317][1282/1160603968] CLIENT: Tallying VOTE1[1] (0, 71)
[1307872316:854339][1282/1160603968] CLIENT: Incoming vote: (eid)0 (pri)100 ELECTABLE (gen)70 (egen)71 [21,986728]
[1307872316:854353][1282/1160603968] CLIENT: Existing vote: (eid)2147483647 (pri)100 (gen)70 (sites)2 [21,946437]
[1307872316:854369][1282/1160603968] CLIENT: Accepting new vote
[1307872316:854379][1282/1160603968] CLIENT: Phase1 election done
[1307872316:854395][1282/1160603968] CLIENT: Voting for 0
[1307872316:854407][1282/1160603968] CLIENT: /opt/bdb/ rep_send_message: msgv = 5 logv 17 gen = 70 eid 0, type vote2, LSN [0][0] nobuf
[1307872317:960344][1282/1192073536] CLIENT: After phase 2: votes 0, nvotes 1, nsites 2
[1307872317:960389][1282/1192073536] CLIENT: Election finished in 1.111809000 sec
[1307872317:960401][1282/1192073536] CLIENT: Election done; egen 72
[1307872317:960412][1282/1192073536] CLIENT: Ended election with -30974, e_th 0, egen 72, flag 0x282c, e_fl 0x0, lo_fl 0x0
Kill me !!
--- my source
on the master I run manually :
txn_rate 1
loop_rate 10
loop 1 20000
* See the file LICENSE for redistribution information.
* Copyright (c) 2001, 2010 Oracle and/or its affiliates. All rights reserved.
* $Id$
* In this application, we specify all communication via the command line. In
* a real application, we would expect that information about the other sites
* in the system would be maintained in some sort of configuration file. The
* critical part of this interface is that we assume at startup that we can
* find out
* 1) what our Berkeley DB home environment is,
* 2) what host/port we wish to listen on for connections; and
* 3) an optional list of other sites we should attempt to connect to.
* These pieces of information are expressed by the following flags.
* -h home (required; h stands for home directory)
* -l host:port (required; l stands for local)
* -C or -M (optional; start up as client or master)
* -r host:port (optional; r stands for remote; any number of these may be
* specified)
* -R host:port (optional; R stands for remote peer; only one of these may
* be specified)
* -a all|quorum (optional; a stands for ack policy)
* -b (optional; b stands for bulk)
* -n nsites (optional; number of sites in replication group; defaults to 0
* to try to dynamically compute nsites)
* -p priority (optional; defaults to 100)
* -v (optional; v stands for verbose)
#include <cstdlib>
#include <cstring>
#include <iostream>
#include <string>
#include <sstream>
#include <sys/types.h>
#include <signal.h>
#include <db_cxx.h>
#include "RepConfigInfo.h"
#include "dbc_auto.h"
using std::cout;
using std::cin;
using std::cerr;
using std::endl;
using std::ends;
using std::flush;
using std::istream;
using std::istringstream;
using std::ostringstream;
using std::string;
using std::getline;
#include <stdio.h>
#include <readline/readline.h>
#include <readline/history.h>
#define CACHESIZE (10 * 1024 * 1024)
#define DATABASE "quote.db"
#define DATABASE2 "quote2.db"
const char *progname = "excxx_repquote";
#include <errno.h>
#ifdef _WIN32
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#define snprintf _snprintf
#define sleep(s) Sleep(1000 * (s))
extern "C" {
extern int getopt(int, char * const *, const char *);
extern char *optarg;
typedef HANDLE thread_t;
typedef DWORD thread_exit_status_t;
#define thread_create(thrp, attr, func, arg) \
(((*(thrp) = CreateThread(NULL, 0, \
(LPTHREAD_START_ROUTINE)(func), (arg), 0, NULL)) == NULL) ? -1 : 0)
#define thread_join(thr, statusp) \
((WaitForSingleObject((thr), INFINITE) == WAIT_OBJECT_0) && \
GetExitCodeThread((thr), (LPDWORD)(statusp)) ? 0 : -1)
#else /* !_WIN32 */
#include <pthread.h>
typedef pthread_t thread_t;
typedef void* thread_exit_status_t;
#define thread_create(thrp, attr, func, arg) \
pthread_create((thrp), (attr), (func), (arg))
#define thread_join(thr, statusp) pthread_join((thr), (statusp))
#endif
// Struct used to store information in Db app_private field.
typedef struct {
bool app_finished;
bool in_client_sync;
bool is_master;
bool no_dummy_wr;
} APP_DATA;
static void log(const char *);
void checkpoint_thread (void );
void log_archive_thread (void );
void dummy_write_thread (void );
class RepQuoteExample {
public:
RepQuoteExample();
void init(RepConfigInfo* config);
void doloop();
int terminate();
static void event_callback(DbEnv* dbenv, u_int32_t which, void *info);
void print_stocks_size(Db *dbp);
private:
// disable copy constructor.
RepQuoteExample(const RepQuoteExample &);
void operator = (const RepQuoteExample &);
// internal data members.
APP_DATA app_data;
RepConfigInfo *app_config;
DbEnv cur_env;
thread_t ckp_thr;
thread_t lga_thr;
thread_t dmy_thr;
// private methods.
void print_stocks(Db *dbp);
void print_env(DbEnv *dbenv);
void prompt();
RepQuoteExample *g_runner=NULL;
RepConfigInfo *g_config=NULL;
class DbHolder {
public:
DbHolder(DbEnv env, const char _dbname) : env(env)
dbp = 0;
if (_dbname) dbname=_dbname;
else dbname=DATABASE;
~DbHolder() {
try {
close();
} catch (...) {
// Ignore: this may mean another exception is pending
bool ensure_open(bool creating) {
if (dbp)
return (true);
dbp = new Db(env, 0);
u_int32_t flags = DB_AUTO_COMMIT;
if (creating)
flags |= DB_CREATE;
try {
//dbp->open(NULL, DATABASE, NULL, DB_BTREE, flags, 0);
//dbp->open(NULL, dbname, NULL, DB_BTREE, flags, 0);
dbp->open(NULL, NULL, dbname, DB_BTREE, flags, 0);
return (true);
} catch (DbDeadlockException e) {
} catch (DbRepHandleDeadException e) {
} catch (DbException e) {
if (e.get_errno() == DB_REP_LOCKOUT) {
// Just fall through.
} else if (e.get_errno() == ENOENT && !creating) {
// Provide a bit of extra explanation.
log("Stock DB does not yet exist");
} else
throw;
// (All retryable errors fall through to here.)
log("please retry the operation");
close();
return (false);
void close() {
if (dbp) {
try {
dbp->close(0);
delete dbp;
dbp = 0;
} catch (...) {
delete dbp;
dbp = 0;
throw;
operator Db *() {
return dbp;
Db *operator->() {
return dbp;
private:
Db *dbp;
DbEnv *env;
const char *dbname;
class StringDbt : public Dbt {
public:
#define GET_STRING_OK 0
#define GET_STRING_INVALID_PARAM 1
#define GET_STRING_SMALL_BUFFER 2
#define GET_STRING_EMPTY_DATA 3
int get_string(char **buf, size_t buf_len)
size_t copy_len;
int ret = GET_STRING_OK;
if (buf == NULL) {
cerr << "Invalid input buffer to get_string" << endl;
return GET_STRING_INVALID_PARAM;
// make sure the string is null terminated.
memset(*buf, 0, buf_len);
// if there is no string, just return.
if (get_data() == NULL || get_size() == 0)
return GET_STRING_OK;
if (get_size() >= buf_len) {
ret = GET_STRING_SMALL_BUFFER;
copy_len = buf_len - 1; // save room for a terminator.
} else
copy_len = get_size();
memcpy(*buf, get_data(), copy_len);
return ret;
size_t get_string_length()
if (get_size() == 0)
return 0;
return strlen((char *)get_data());
void set_string(char *string)
set_data(string);
set_size((u_int32_t)strlen(string));
StringDbt(char *string) :
Dbt(string, (u_int32_t)strlen(string)) {};
StringDbt() : Dbt() {};
~StringDbt() {};
// Don't add extra data to this sub-class since we want it to remain
// compatible with Dbt objects created internally by Berkeley DB.
Db *g_repquote=NULL;
RepQuoteExample::RepQuoteExample() : app_config(0), cur_env(0) {
app_data.app_finished = 0;
app_data.in_client_sync = 0;
app_data.is_master = 0; // assume I start out as client
app_data.no_dummy_wr = 0 ; //prevent to run dummy write
int (*old_rep_process_message)
__P((DB_ENV *, DBT *, DBT *, int, DB_LSN *));
int my_rep_process_message __P((DB_ENV arg1, DBT arg2, DBT arg3, int arg4, DB_LSN arg5))
printf("EZ->>> my_rep_process_message:%p\n",arg5);
old_rep_process_message(arg1,arg2,arg3,arg4,arg5);
void RepQuoteExample::init(RepConfigInfo *config) {
app_config = config;
cur_env.set_app_private(&app_data);
cur_env.set_errfile(stderr);
app_data.no_dummy_wr=config->no_dummy_wr;
if (app_data.no_dummy_wr)
printf("No dummy !!!\n");
//EZ->cur_env.set_errpfx(progname);
cur_env.set_event_notify(event_callback);
// Configure bulk transfer to send groups of records to clients
// in a single network transfer. This is useful for master sites
// and clients participating in client-to-client synchronization.
if (app_config->bulk)
cur_env.rep_set_config(DB_REP_CONF_BULK, 1);
// Set the total number of sites in the replication group.
// This is used by repmgr internal election processing.
if (app_config->totalsites > 0)
cur_env.rep_set_nsites(app_config->totalsites);
// Turn on debugging and informational output if requested.
if (app_config->verbose)
cur_env.set_verbose(DB_VERB_REPLICATION, 1);
cur_env.set_verbose(DB_VERB_REPMGR_MISC, 1);
cur_env.set_verbose(DB_VERB_RECOVERY, 1);
cur_env.set_verbose(DB_VERB_REPLICATION, 1);
cur_env.set_verbose(DB_VERB_REP_ELECT, 1);
cur_env.set_verbose(DB_VERB_REP_LEASE, 1);
cur_env.set_verbose(DB_VERB_REP_SYNC, 1);
cur_env.set_verbose(DB_VERB_REPMGR_MISC, 1);
// Set replication group election priority for this environment.
// An election first selects the site with the most recent log
// records as the new master. If multiple sites have the most
// recent log records, the site with the highest priority value
// is selected as master.
cur_env.rep_set_priority(app_config->priority);
// Set the policy that determines how master and client sites
// handle acknowledgement of replication messages needed for
// permanent records. The default policy of "quorum" requires only
// a quorum of electable peers sufficient to ensure a permanent
// record remains durable if an election is held. The "all" option
// requires all clients to acknowledge a permanent replication
// message instead.
cur_env.repmgr_set_ack_policy(app_config->ack_policy);
// Set the threshold for the minimum and maximum time the client
// waits before requesting retransmission of a missing message.
// Base these values on the performance and load characteristics
// of the master and client host platforms as well as the round
// trip message time.
cur_env.rep_set_request(20000, 500000);
// Configure deadlock detection to ensure that any deadlocks
// are broken by having one of the conflicting lock requests
// rejected. DB_LOCK_DEFAULT uses the lock policy specified
// at environment creation time or DB_LOCK_RANDOM if none was
// specified.
cur_env.set_lk_detect(DB_LOCK_DEFAULT);
// The following base replication features may also be useful to your
// application. See Berkeley DB documentation for more details.
// - Master leases: Provide stricter consistency for data reads
// on a master site.
// - Timeouts: Customize the amount of time Berkeley DB waits
// for such things as an election to be concluded or a master
// lease to be granted.
// - Delayed client synchronization: Manage the master site's
// resources by spreading out resource-intensive client
// synchronizations.
// - Blocked client operations: Return immediately with an error
// instead of waiting indefinitely if a client operation is
// blocked by an ongoing client synchronization.
cur_env.repmgr_set_local_site(app_config->this_host.host,
app_config->this_host.port, 0);
for ( REP_HOST_INFO *cur = app_config->other_hosts; cur != NULL;
cur = cur->next) {
cur_env.repmgr_add_remote_site(cur->host, cur->port,
NULL, cur->peer ? DB_REPMGR_PEER : 0);
// Configure heartbeat timeouts so that repmgr monitors the
// health of the TCP connection. Master sites broadcast a heartbeat
// at the frequency specified by the DB_REP_HEARTBEAT_SEND timeout.
// Client sites wait for message activity the length of the
// DB_REP_HEARTBEAT_MONITOR timeout before concluding that the
// connection to the master is lost. The DB_REP_HEARTBEAT_MONITOR
// timeout should be longer than the DB_REP_HEARTBEAT_SEND timeout.
cur_env.rep_set_timeout(DB_REP_HEARTBEAT_SEND, 5000000);
cur_env.rep_set_timeout(DB_REP_HEARTBEAT_MONITOR, 10000000);
// The following repmgr features may also be useful to your
// application. See Berkeley DB documentation for more details.
// - Two-site strict majority rule - In a two-site replication
// group, require both sites to be available to elect a new
// master.
// - Timeouts - Customize the amount of time repmgr waits
// for such things as waiting for acknowledgements or attempting
// to reconnect to other sites.
// - Site list - return a list of sites currently known to repmgr.
// We can now open our environment, although we're not ready to
// begin replicating. However, we want to have a dbenv around
// so that we can send it into any of our message handlers.
cur_env.set_cachesize(0, CACHESIZE, 0);
cur_env.set_flags(DB_REP_PERMANENT, 1);
//cur_env.set_flags(DB_TXN_WRITE_NOSYNC, 1);
/* u_int32_t maxlocks=300000;
if (maxlocks != 0)
cur_env.set_lk_max_locks(maxlocks);
u_int32_t maxlocks_o=300000;
if (maxlocks_o != 0)
cur_env.set_lk_max_objects(maxlocks_o);
u_int32_t maxmutex=300000;
if (maxmutex != 0)
cur_env.mutex_set_max(maxmutex);
DbEnv *m_env=&cur_env;
m_env->set_flags(DB_TXN_NOSYNC, 1);
m_env->set_lk_max_lockers(60000);
m_env->set_lk_max_objects(60000);
m_env->set_lk_max_locks(60000);
m_env->set_tx_max(60000);
//m_env->repmgr_set_ack_policy(DB_REPMGR_ACKS_NONE);
m_env->rep_set_timeout(DB_REP_ACK_TIMEOUT, 50 * 1000); //50ms
m_env->rep_set_timeout(DB_REP_CHECKPOINT_DELAY, 0);
//m_env->rep_set_timeout(DB_REP_CONNECTION_RETRY, 30 * 1000 * 1000); // 30 seconds
m_env->rep_set_timeout(DB_REP_ELECTION_TIMEOUT, 1 * 1000 * 1000); // 5 seconds
m_env->rep_set_timeout(DB_REP_FULL_ELECTION_TIMEOUT, 5 * 1000 * 1000); // 5 seconds
m_env->rep_set_timeout(DB_REP_CONNECTION_RETRY, 5 * 1000 * 1000);
//m_env->rep_set_timeout(DB_REP_ELECTION_RETRY, 10 * 1000 * 1000); //10 seconds
//m_env->rep_set_timeout(DB_REP_HEARTBEAT_MONITOR, 80 * 1000 * 1000); //80 seconds
//m_env->rep_set_timeout(DB_REP_HEARTBEAT_SEND, 500 * 1000); //500 milli seconds
//The minimum number of microseconds a client waits before requesting retransmission
u_int32_t rep_req_min = 40000; //40 000 microsec = 40 mili
//The maximum number of microseconds a client waits before requesting retransmission
u_int32_t rep_req_max = 1280000;// 1 280 000 microsec = 1.28 sec
u_int32_t rep_limit_gbytes = 0;
u_int32_t rep_limit_bytes = 100 * 1024 * 1024; // 100MB
m_env->rep_set_request(rep_req_min, rep_req_max);
m_env->rep_set_limit(rep_limit_gbytes, rep_limit_bytes);
cur_env.open(app_config->home, DB_CREATE | DB_RECOVER |
DB_THREAD | DB_INIT_REP | DB_INIT_LOCK | DB_INIT_LOG |
DB_INIT_MPOOL | DB_INIT_TXN , 0);
//keep old function for chain
//old_rep_process_message=cur_env.get_DB_ENV()->rep_process_message;
//derouting
//cur_env.get_DB_ENV()->rep_process_message=my_rep_process_message;
/*int _i;
cur_env.log_get_config(DB_LOG_DIRECT, &_i);printf ("DB_LOG_DIRECT = %d\n",_i);
cur_env.log_get_config(DB_LOG_DSYNC, &_i);printf ("DB_LOG_DSYNC = %d\n",_i);
cur_env.log_get_config(DB_LOG_AUTO_REMOVE, &_i);printf ("DB_LOG_AUTO_REMOVE = %d\n",_i);
cur_env.log_get_config(DB_LOG_IN_MEMORY, &_i);printf ("DB_LOG_IN_MEMORY = %d\n",_i);
cur_env.log_get_config(DB_LOG_ZERO,&_i);printf ("DB_LOG_ZERO = %d\n",_i);
// Start checkpoint and log archive support threads.
(void)thread_create(&ckp_thr, NULL, checkpoint_thread, &cur_env);
(void)thread_create(&lga_thr, NULL, log_archive_thread, &cur_env);
(void)thread_create(&dmy_thr, NULL, dummy_write_thread, &cur_env);
cur_env.repmgr_start(3, app_config->start_policy);
}int RepQuoteExample::terminate() {
try {
// Wait for checkpoint and log archive threads to finish.
// Windows does not allow NULL pointer for exit code variable.
thread_exit_status_t exstat;
(void)thread_join(lga_thr, &exstat);
(void)thread_join(ckp_thr, &exstat);
(void)thread_join(dmy_thr, &exstat);
// We have used the DB_TXN_NOSYNC environment flag for
// improved performance without the usual sacrifice of
// transactional durability, as discussed in the
// "Transactional guarantees" page of the Reference
// Guide: if one replication site crashes, we can
// expect the data to exist at another site. However,
// in case we shut down all sites gracefully, we push
// out the end of the log here so that the most
// recent transactions don't mysteriously disappear.
cur_env.log_flush(NULL);
cur_env.close(0);
} catch (DbException dbe) {
cout << "error closing environment: " << dbe.what() << endl;
return 0;
void RepQuoteExample::prompt() {
cout << "QUOTESERVER";
if (!app_data.is_master)
cout << "(read-only)";
cout << "> " << flush;
void log(const char *msg) {
time_t currentTime;
// get and print the current time
time (¤tTime); // fill now with the current time
char buff[255];
strncpy(buff,ctime(¤tTime),sizeof(buff));
char *p;
for(p =buff ; *p != '\n'; p++);
*p = '\0';
cerr << buff << " - " << msg << endl;
// Simple command-line user interface:
// - enter "<stock symbol> <price>" to insert or update a record in the
// database;
// - just press Return (i.e., blank input line) to print out the contents of
// the database;
// - enter "quit" or "exit" to quit.
void RepQuoteExample::doloop() {
DbHolder dbh1(&cur_env,DATABASE);
DbHolder dbh2(&cur_env,DATABASE2);
DbHolder *dbh=&dbh1;
DbTxn *txn;
string input;
bool truncate = false;
char *c;
using_history();
g_repquote=*dbh;
int loop_rate = 0;
int txn_rate = 500;
while (prompt(), /*getline(cin, input)*/c=readline(NULL)) {
input=std::string(c);
add_history(c);
free(c);
int start_loop = 0;
int end_loop = 0;
int start_loop_d = 0;
int end_loop_d = 0;
istringstream is(input);
string token1, token2, token3;
truncate = false;
start_loop = 0;
end_loop = 0;
// Read 0, 1 or 2 tokens from the input.
int count = 0;
if (is >> token1) {
count++;
if (is >> token2)
count++;
if (is >> token3)
count++;
if (count == 1) {
if (token1 == "truncate" ) {
truncate = true;
else if (token1 == "env" ){
print_env(&cur_env);
continue;
else if (token1 == "verbose" ) {
app_config->verbose = !app_config->verbose;
if (app_config->verbose)
cur_env.set_verbose(DB_VERB_REPLICATION, 1);
cur_env.set_verbose(DB_VERB_REPMGR_MISC, 1);
cur_env.set_verbose(DB_VERB_RECOVERY, 1);
cur_env.set_verbose(DB_VERB_REP_ELECT, 1);
cur_env.set_verbose(DB_VERB_REP_LEASE, 1);
cur_env.set_verbose(DB_VERB_REP_SYNC, 1);
cur_env.set_verbose(DB_VERB_REPMGR_MISC, 1);
log("verbose is on");
else
cur_env.set_verbose(DB_VERB_REPLICATION, 0);
cur_env.set_verbose(DB_VERB_REPMGR_MISC, 0);
cur_env.set_verbose(DB_VERB_RECOVERY, 0);
cur_env.set_verbose(DB_VERB_REP_ELECT, 0);
cur_env.set_verbose(DB_VERB_REP_LEASE, 0);
cur_env.set_verbose(DB_VERB_REP_SYNC, 0);
cur_env.set_verbose(DB_VERB_REPMGR_MISC, 0);
log("verbose is off");
continue;
else if (token1 == "print" ) {
print_stocks(*dbh);
count = 0;
else if (token1 == "db1" ) {
dbh=&dbh1;
g_repquote=*dbh;
log( "switch to Db1");
count = 0;
else if (token1 == "db2" ) {
dbh=&dbh2;
g_repquote=*dbh;
log( "switch to Db2");
count = 0;
else if (token1 == "exit" || token1 == "quit") {
app_data.app_finished = 1;
break;
} else {
log("Format: <stock> <price>");
continue;
else if (count == 2)
if (token1 == "loop_rate" ){
loop_rate = atoi(token2.c_str());
continue;
if (token1 == "txn_rate" ){
txn_rate = atoi(token2.c_str());
continue;
else if (count == 3)
if (token1 == "loop" ) {
start_loop = atoi(token2.c_str());
end_loop = start_loop + atoi(token3.c_str());
if (token1 == "delete" ) {
start_loop_d = atoi(token2.c_str());
end_loop_d = start_loop_d + atoi(token3.c_str());
// Here we know count is either 0 or 2, so we're about to try a
// DB operation.
// Open database with DB_CREATE only if this is a master
// database. A client database uses polling to attempt
// to open the database without DB_CREATE until it is
// successful.
// This DB_CREATE polling logic can be simplified under
// some circumstances. For example, if the application can
// be sure a database is already there, it would never need
// to open it with DB_CREATE.
if (!dbh->ensure_open(app_data.is_master))
continue;
try {
if (count == 0)
if (app_data.in_client_sync)
log( "Cannot read data during client initialization - please try again.");
else
print_stocks_size(*dbh);
else if (!app_data.is_master)
log("Can't update at client");
else {
if (truncate)
u_int32_t no_remove;
txn = NULL;
cur_env.txn_begin(NULL, &txn, DB_TXN_NOWAIT);
try
(*dbh)->truncate(txn, &no_remove, 0);
// commit
txn->commit(0);
txn = NULL;
} catch (DbException &e) {
std::cout << "Error on txn commit: " << e.what() << std::endl;
// } catch (DbDeadlockException &) {
if (txn != NULL)
(void)txn->abort();
// std::cout << "Error on txn commit: " << std::endl;
else if (start_loop)
int j=0;
for (int i=start_loop; i<=end_loop; i=i+txn_rate)
//transaction begin
txn = NULL;
cur_env.txn_begin(NULL, &txn, 0);
for (j=i; j<=end_loop && j<=(i+txn_rate); j++)
Dbt key, value;
std::string key1, value1;
std::stringstream sstrm;
sstrm << "key" << j << ends;
key1 = sstrm.str();
key.set_data((void *)key1.c_str());
key.set_size((u_int32_t)strlen(key1.c_str()));
sstrm.str("");
int payload = rand() + j;
sstrm << "price" << payload << ends;
value1 = sstrm.str();
value.set_data((void *)value1.c_str());
value.set_size((u_int32_t)strlen(value1.c_str()));
// Perform the database put
(*dbh)->put(txn, &key, &value, 0);
printf("Kill me !!\n");
kill(getpid(),-9);
exit(0);
try
// commit
txn->commit(0);
txn = NULL;
} catch (DbException &e) {
std::cout << "Error on txn commit: " << e.what() << std::endl;
if (loop_rate>0)
usleep(txn_rate * 1000 * 1000 / loop_rate);
else if (start_loop_d)
int j=0;
for (int i=start_loop_d; i<=end_loop_d; i=i+100)
//transaction begin
txn = NULL;
cur_env.txn_begin(NULL, &txn, 0);
for (j=i; j<=end_loop_d && j<=(i+100); j++)
Dbt key, value;
std::string key1, value1;
std::stringstream sstrm;
sstrm << "key" << j << ends;
key1 = sstrm.str();
key.set_data((void *)key1.c_str());
key.set_size((u_int32_t)strlen(key1.c_str()));
// Perform the database put
(*dbh)->del(txn, &key, 0);
try
// commit
txn->commit(0);
txn = NULL;
} catch (DbException &e) {
std::cout << "Error on txn commit: " << e.what() << std::endl;
else
const char *symbol = token1.c_str();
StringDbt key(const_cast<char*>(symbol));
const char *price = token2.c_str();
StringDbt data(const_cast<char*>(price));
(*dbh)->put(NULL, &key, &data, 0);
} catch (DbDeadlockException e) {
log("please retry the operation");
dbh->close();
} catch (DbRepHandleDeadException e) {
log("please retry the operation");
dbh->close();
} catch (DbException e) {
if (e.get_errno() == DB_REP_LOCKOUT) {
log("please retry the operation");
dbh->close();
} else
throw;
dbh->close();
void RepQuoteExample::event_callback(DbEnv* dbenv, u_int32_t which, void *info)
static char buf[256];
APP_DATA app = (APP_DATA)dbenv->get_app_private();
info = NULL; /* Currently unused. */
switch (which) {
case DB_EVENT_REP_CLIENT:
app->is_master = 0;
app->in_client_sync = 1;
sprintf(buf,"%s - %s",progname,"CLIENT");
//EZ->dbenv->set_errpfx(buf);
log("DB_EVENT_REP_CLIENT.");
break;
case DB_EVENT_REP_MASTER:
app->is_master = 1;
app->in_client_sync = 0;
sprintf(buf,"%s - %s",progname,"MASTER");
//EZ->dbenv->set_errpfx(buf);
log("DB_EVENT_REP_MASTER.");
break;
case DB_EVENT_REP_NEWMASTER:
log("DB_EVENT_REP_NEWMASTER.");
app->in_client_sync = 1;
break;
case DB_EVENT_REP_PERM_FAILED:
// Did not get enough acks to guarantee transaction
// durability based on the configured ack policy. This
// transaction will be flushed to the master site's
// local disk storage for durability.
log("DB_EVENT_REP_PERM_FAILED.");
log("Insufficient acknowledgements to guarantee transaction durability.");
break;
case DB_EVENT_REP_STARTUPDONE:
app->in_client_sync = 0;
log("DB_EVENT_REP_STARTUPDONE.");
break;
case DB_EVENT_REP_ELECTION_FAILED:
log("DB_EVENT_REP_ELECTION_FAILED.");
//g_runner->init(g_config);
printf("Kill me !!\n");
kill(getpid(),-9);
exit(0);
break;
case DB_EVENT_REP_DUPMASTER:
log("DB_EVENT_REP_DUPMASTER.");
break;
default:
dbenv->errx("ignoring event %d", which);
void RepQuoteExample::print_stocks_size(Db *dbp) {
DB_BTREE_STAT *statp;
dbp->stat(NULL, &statp, 0);
log("db_stat");
cout << "***************************************** >>>>>>>>>>> : database contains " << (u_long)statp->bt_ndata << " records\n";
void RepQuoteExample::print_env(DbEnv *dbenv) {
dbenv->stat_print(DB_STAT_ALL);
void RepQuoteExample::print_stocks(Db *dbp) {
StringDbt key, data;
#define MAXKEYSIZE 10
#define MAXDATASIZE 20
char keybuf[MAXKEYSIZE + 1], databuf[MAXDATASIZE + 1];
char kbuf, dbuf;
memset(&key, 0, sizeof(key));
memset(&data, 0, sizeof(data));
kbuf = keybuf;
dbuf = databuf;
DbcAuto dbc(dbp, 0, 0);
cout << "\tSymbol\tPrice" << endl
<< "\t======\t=====" << endl;
int no_records =0;
for (int ret = dbc->get(&key, &data, DB_FIRST);
ret == 0;
ret = dbc->get(&key, &data, DB_NEXT)) {
key.get_string(&kbuf, MAXKEYSIZE);
data.get_string(&dbuf, MAXDATASIZE);
no_records++;
cout << "\t" << keybuf << "\t" << databuf << endl;
cout << "********************** NO Records " << no_records << endl;
cout << endl << flush;
dbc.close();
static void usage() {
cerr << "usage: " << progname << " -h home -l host:port [-CM]"
<< "[-r host:port][-R host:port]" << endl
<< " [-a all|quorum][-b][-n nsites][-p priority][-v]" << endl;
cerr << "\t -h home (required; h stands for home directory)" << endl
<< "\t -l host:port (required; l stands for local)" << endl
<< "\t -C or -M (optional; start up as client or master)" << endl
<< "\t -r host:port (optional; r stands for remote; any "
<< "number of these" << endl
<< "\t may be specified)" << endl
<< "\t -R host:port (optional; R stands for remote peer; only "
<< "one of" << endl
<< "\t these may be specified)" << endl
<< "\t -a all|quorum (optional; a stands for ack policy)" << endl
<< "\t -b (optional; b stands for bulk)" << endl
<< "\t -n nsites (optional; number of sites in replication "
<< "group; defaults " << endl
<< "\t to 0 to try to dynamically compute nsites)" << endl
<< "\t -p priority (optional; defaults to 100)" << endl
<< "\t -v (optional; v stands for verbose)" << endl;
exit(EXIT_FAILURE);
int main(int argc, char **argv) {
RepConfigInfo config;
char ch, portstr, tmphost;
int tmpport;
bool tmppeer;
config.no_dummy_wr = false;
// Extract the command line parameters
while ((ch = getopt(argc, argv, "E:a:bCh:l:Mn:p:R:r:vw")) != EOF) {
tmppeer = false;
switch (ch) {
case 'a':
if (strncmp(optarg, "all", 3) == 0)
config.ack_policy = DB_REPMGR_ACKS_ALL;
else if (strncmp(optarg, "quorum", 6) != 0)
usage();
break;
case 'b':
config.bulk = true;
break;
case 'C':
config.start_policy = DB_REP_CLIENT;
break;
case 'E':
config.start_policy = DB_REP_ELECTION;
break;
case 'h':
config.home = optarg;
break;
case 'l':
config.this_host.host = strtok(optarg, ":");
if ((portstr = strtok(NULL, ":")) == NULL) {
cerr << "Bad host specification." << endl;
usage();
config.this_host.port = (unsigned short)atoi(portstr);
config.got_listen_address = true;
break;
case 'M':
config.start_policy = DB_REP_MASTER;
break;
case 'n':
config.totalsites = atoi(optarg);
break;
case 'p':
config.priority = atoi(optarg);
break;
case 'R':
tmppeer = true; // FALLTHROUGH
case 'r':
tmphost = strtok(optarg, ":");
if ((portstr = strtok(NULL, ":")) == NULL) {
cerr << "Bad host specification." << endl;
usage();
tmpport = (unsigned short)atoi(portstr);
config.addOtherHost(tmphost, tmpport, tmppeer);
break;
case 'v':
config.verbose = true;
break;
case 'w':
config.no_dummy_wr = true;
//config.priority = 2;
break;
case '?':
default:
usage();
// Error check command line.
if ((!config.got_listen_address) || config.home == NULL)
usage();
RepQuoteExample runner;
g_runner=&runner;
g_config=&config;
try {
runner.init(&config);
runner.doloop();
} catch (DbException dbe) {
cerr << "Caught an exception during initialization or"
<< " processing: " << dbe.what() << endl;
runner.terminate();
return 0;
// This is a very simple thread that performs checkpoints at a fixed
// time interval. For a master site, the time interval is one minute
// plus the duration of the checkpoint_delay timeout (30 seconds by
// default.) For a client site, the time interval is one minute.
void checkpoint_thread(void args)
DbEnv *env;
APP_DATA *app;
int i, ret;
env = (DbEnv *)args;
app = (APP_DATA *)env->get_app_private();
for (;;) {
// Wait for one minute, polling once per second to see if
// application has finished. When application has finished,
// terminate this thread.
for (i = 0; i < 60; i++) {
sleep(1);
if (app->app_finished == 1)
return ((void *)EXIT_SUCCESS);
// Perform a checkpoint.
// original line
if ((ret = env->txn_checkpoint(0, 0, 0)) != 0) {
//if ((ret = env->txn_checkpoint(0, 0, DB_FORCE)) != 0) {
env->err(ret, "Could not perform checkpoint.\n");
return ((void *)EXIT_FAILURE);
// This is a simple log archive thread. Once per minute, it removes all but
// the most recent 3 logs that are safe to remove according to a call to
// DBENV->log_archive().
// Log cleanup is needed to conserve disk space, but aggressive log cleanup
// can cause more frequent client initializations if a client lags too far
// behind the current master. This can happen in the event of a slow client,
// a network partition, or a new master that has not kept as many logs as the
// previous master.
// The approach in this routine balances the need to mitigate against a
// lagging client by keeping a few more of the most recent unneeded logs
// with the need to conserve disk space by regularly cleaning up log files.
// Use of automatic log removal (DBENV->log_set_config() DB_LOG_AUTO_REMOVE
// flag) is not recommended for replication due to the risk of frequent
// client initializations.
void log_archive_thread(void args)
DbEnv *env;
APP_DATA *app;
char **begin, **list;
int i, listlen, logs_to_keep, minlog, ret;
env = (DbEnv *)args;
app = (APP_DATA *)env->get_app_private();
logs_to_keep = 3;
for (;;) {
// Wait for one minute, polling once per second to see if
// application has finished. When application has finished,
// terminate this thread.
for (i = 0; i < 60; i++) {
sleep(1);
if (app->app_finished == 1)
return ((void *)EXIT_SUCCESS);
// Get the list of unneeded log files.
if ((ret = env->log_archive(&list, DB_ARCH_ABS)) != 0) {
env->err(ret, "Could not get log archive list.");
return ((void *)EXIT_FAILURE);
if (list != NULL) {
listlen = 0;
// Get the number of logs in the list.
for (begin = list; *begin != NULL; begin++, listlen++);
// Remove all but the logs_to_keep most recent
// unneeded log files.
minlog = listlen - logs_to_keep;
for (begin = list, i= 0; i < minlog; list++, i++) {
if ((ret = unlink(*list)) != 0) {
env->err(ret,
"logclean: remove %s", *list);
env->errx(
"logclean: Error remove %s", *list);
free(begin);
return ((void *)EXIT_FAILURE);
free(begin);
#define DATABASE_DUMMY "dummy.db"
void create_dummy_db(DB_ENV env, DB *dbp)
DB_ENV *dbenv=env;
int ret;
u_int32_t db_flags;
if ((ret = db_create(dbp, dbenv, 0)) != 0)
dbenv->err(dbenv, ret, "create_dummy_db: db_create");
db_flags = DB_AUTO_COMMIT | DB_CREATE;
//if ((ret = (*dbp)->open(*dbp,NULL, DATABASE, NULL, DB_BTREE, db_flags, 0)) != 0)
if ((ret = (*dbp)->open(*dbp,NULL, NULL, DATABASE_DUMMY, DB_BTREE, db_flags, 0)) != 0)
dbenv->err(dbenv, ret, "create_dummy_db: DB->open");
void reopen_dummy_db(DB_ENV env, DB *dbp)
DB_ENV *dbenv=env;
int ret;
u_int32_t db_flags;
if ((ret = db_create(dbp, dbenv, 0)) != 0)
dbenv->err(dbenv, ret, "create_dummy_db: db_create");
db_flags = DB_AUTO_COMMIT | DB_CREATE;
//if ((ret = (*dbp)->open(*dbp,NULL, DATABASE, NULL, DB_BTREE, db_flags, 0)) != 0)
if ((ret = (*dbp)->open(*dbp,NULL, NULL, DATABASE_DUMMY, DB_BTREE, db_flags, 0)) != 0)
dbenv->err(dbenv, ret, "reopen_dummy_db: DB->open");
void perform_db_operation(DB_ENV env, DB *dbp, bool bRead)
//main loop
//DB *dbp=NULL;
DB_ENV *dbenv=env;
int ret;
u_int32_t db_flags;
DBT key, data;
char buf[20]="dummy", *rbuf;
rbuf=buf;
if (*dbp == NULL)
create_dummy_db(dbenv, dbp);
if (! bRead)
memset(&key, 0, sizeof(key));
memset(&data, 0, sizeof(data));
key.data = buf;
key.size = (u_int32_t)strlen(buf);
data.data = rbuf;
data.size = (u_int32_t)strlen(rbuf);
if ((ret = (*dbp)->put(*dbp, NULL, &key, &data, 0)) != 0)
if (ret == DB_REP_HANDLE_DEAD)
//create_dummy_db(dbenv, dbp);
reopen_dummy_db(dbenv, dbp);
(*dbp)->err(*dbp, ret, "DB->put :");
else
if (ret != DB_KEYEXIST)
(*dbp)->err(*dbp, ret, "perform_db_operation: DB->put");
else
DB_BTREE_STAT *statp;
(*dbp)->stat(*dbp,NULL, &statp, 0);
std::cout<<"dbp read stats: key#"<< statp->bt_nkeys <<std::endl;
void dummy_write_thread(void args)
DbEnv *env;
APP_DATA *app;
char **begin, **list;
int i, listlen, logs_to_keep, minlog, ret;
DB *m_dbp; // a pointer
env = (DbEnv *)args;
app = (APP_DATA *)env->get_app_private();
logs_to_keep = 3;
for (;;) {
if (! app->no_dummy_wr)
if (app->is_master)
perform_db_operation(env->get_DB_ENV(),&m_dbp,false);
//env->txn_checkpoint(0, 0, DB_FORCE);
usleep(1 * 1000 * 1000);
else
if (app->is_master)
//DB *db_quote=g_repquote->get_DB();
//perform_db_operation(env->get_DB_ENV(),&db_quote,true);
//if (g_repquote)
// g_runner->print_stocks_size(g_repquote);
//env->txn_checkpoint(0, 0, DB_FORCE);
//perform_db_operation(env->get_DB_ENV(),&m_dbp,false);
env->rep_flush();
usleep(4 * 1000 * 1000);
my script to simulate the split brain
#!/bin/sh
[ -z "$node1" ] && node1=10.10.32.121
[ -z "$node2" ] && node2=10.10.32.91
trap myend 0 1 2 3 6 9 14 15
myend()
echo "Receive signal to stop test..."
un_split_brain
echo "done"
exit 1
split_brain()
echo -n "Split-Brain at node $node..."
snmpset -m ALL -v 2c -c svil 10.10.0.100 ifAdminStatus.41 i 2 >/dev/null 2>&1
echo "done"
un_split_brain()
echo -n "Undo Split-Brain at node $node..."
snmpset -m ALL -v 2c -c svil 10.10.0.100 ifAdminStatus.41 i 1 >/dev/null 2>&1
echo "done"
is_slave()
local r=$(ssh root@$1 "tail -2 /tmp/BDB.log" | grep -c CLIENT)
[ $r -gt 1 ] && ret=1 || ret=0
return $ret
is_master()
local r=$(ssh root@$1 "tail -2 /tmp/BDB.log" | grep -c MASTER)
[ $r -gt 1 ] && ret=1 || ret=0
return $ret
wait_for_master()
echo -n "Waiting for MASTER at node $node ... "
is_master $node
r=$?
while ( [ ! $r -eq 1 ] )
do
usleep 500000
is_master $node
r=$?
echo -n "."
done
echo "done"
wait_for_slave()
local r
local tm
tm=0
echo -n "Waiting for SLAVE at node $node ... "
is_slave $node
r=$?
while ( [ ! $r -eq 1 ] )
do
usleep 500000
is_slave $node
r=$?
echo -n "."
tm=$((tm+1))
[ $tm -gt 120 ] && break
done
[ $tm -gt 120 ] && ret=0 || ret=1
echo "done"
return $ret
run_test_split_brain()
local nt
nt=1
nfails=0
x=4
[ -z "$1" ] && node=$node2
while ((1))
do
printf "*************** TEST [%02d] ********************\n" $nt
split_brain
wait_for_master
x=$((RANDOM%9))
echo -n " waiting $x sec ..."
sleep $x
echo "done"
un_split_brain
wait_for_slave
r=$?
[ ! $r -eq 1 ] && echo "`date` - test [$nt] - fails ..." || echo "`date` - test [$nt] - OK ."
[ ! $r -eq 1 ] && nfails=$((nfails+1))
perc_failure=$(echo "100.0 - $nfails / $nt * 100.0" | bc -l)
echo "************************************************ [% Success test $perc_failure % ]"
nt=$((nt+1))
x=$((RANDOM%9))
echo -n " waiting $x sec ..."
sleep $x
done
run_test_split_brain
here is the makefile to run to two environments
i run:
- make run
and in another window sh test_split_brain.sh
node1?=10.10.32.121
node2?=10.10.32.91
nsite?=2
debug?=0
all: RepQuoteExampleEric install
RepConfigInfo.o: RepConfigInfo.cpp RepConfigInfo.h
g++ -I/usr/local/BerkeleyDB.5.1/include/ -g -O0 -c RepConfigInfo.cpp -o RepConfigInfo.o
RepQuoteExampleEric: RepQuoteExampleEric.cpp RepConfigInfo.o
g++ -I/usr/local/BerkeleyDB.5.1/include/ -g -O0 RepQuoteExampleEric.cpp RepConfigInfo.o -o RepQuoteExampleEric -L /usr/local/BerkeleyDB.5.1/lib/ -lreadline -lcurses -ldb_cxx
kill:
-ssh -X root@$(node1) "killall -9 /root/RepQuoteExampleEric"
-ssh -X root@$(node2) "killall -9 /root/RepQuoteExampleEric"
run: RepQuoteExampleEric kill install clean_env
ssh -X root@$(node1) "xterm -geom 100x20+100+100 -e \"LD_LIBRARY_PATH=/usr/local/BerkeleyDB.5.1/lib/ /root/RepQuoteExampleEric -h /opt/bdb/ -l 2.0.0.110:12345 -r 2.0.0.210:12345 -a quorum -b -n $(nsite) -v | tee /tmp/BDB.log\"" &
ssh -X root@$(node2) "xterm -geom 100x20+800+100 -e \"LD_LIBRARY_PATH=/usr/local/BerkeleyDB.5.1/lib/ /root/RepQuoteExampleEric -h /opt/bdb/ -l 2.0.0.210:12345 -r 2.0.0.110:12345 -a quorum -b -n $(nsite) -v -w | tee /tmp/BDB.log\"" &
run_node2: clean_env2
ssh -X root@$(node2) "xterm -geom 100x20+800+100 -e \"LD_LIBRARY_PATH=/usr/local/BerkeleyDB.5.1/lib/ /root/RepQuoteExampleEric -h /opt/bdb/ -l 2.0.0.210:12345 -r 2.0.0.110:12345 -a quorum -b -n $(nsite) -v -w | tee /tmp/BDB.log\"" &
debug_node2: clean_env2
ssh -X root@$(node2) "xterm -geom 100x20+800+100 -e \"LD_LIBRARY_PATH=/usr/local/BerkeleyDB.5.1/lib/ /root/RepQuoteExampleEric -h /opt/bdb/ -l 2.0.0.210:12345 -r 2.0.0.110:12345 -a quorum -b -n $(nsite) -v -w | tee /tmp/BDB.log\"" &
sleep 3
ssh -X root@$(node2) /sbin/pidof RepQuoteExampleEric >/tmp/pid
ssh -X root@$(node2) ~/kdbg /root/db-5.1.19/examples/cxx/excxx_repquote/RepQuoteExampleEric -p `cat /tmp/pid`
run_debug_node1: RepQuoteExampleEric kill install clean_env
ssh -X root@$(node1) "xterm -geom 100x20+100+100 -e \"LD_LIBRARY_PATH=/usr/local/BerkeleyDB.5.1/lib/ /root/kdbg /root/RepQuoteExampleEric\" " &
ssh -X root@$(node2) "xterm -geom 100x20+800+100 -e \"LD_LIBRARY_PATH=/usr/local/BerkeleyDB.5.1/lib/ /root/RepQuoteExampleEric -h /opt/bdb/ -l 2.0.0.210:12345 -r 2.0.0.110:12345 -a quorum -b -n $(nsite) -v\"" &
run_debug_node2: RepQuoteExampleEric kill install clean_env
ssh -X root@$(node1) "xterm -geom 100x20+100+100 -e \"LD_LIBRARY_PATH=/usr/local/BerkeleyDB.5.1/lib/ /root/RepQuoteExampleEric -h /opt/bdb/ -l 2.0.0.110:12345 -r 2.0.0.210:12345 -a quorum -b -n $(nsite) -v\" " &
ssh -X root@$(node2) "xterm -geom 100x20+800+100 -e \"LD_LIBRARY_PATH=/usr/local/BerkeleyDB.5.1/lib/ /root/kdbg /root/RepQuoteExampleEric\"" &
install: RepQuoteExampleEric
scp RepQuoteExampleEric root@$(node1):~
scp RepQuoteExampleEric root@$(node2):~
clean_env: clean_env1 clean_env2
clean_env1:
ssh -X root@$(node1) rm -rf /opt/bdb/*
clean_env2:
ssh -X root@$(node2) rm -rf /opt/bdb/* -
Replacing PS4 HDD with an old 1TB HDD
Hello Everyone, I have recently bought a PS4 which will be delivered within 1-2 days. I really wanted a larger Hard drive as I think 500 GB won't be enough for me so I decided that I will upgrade my HDD to 1 TB before using my PS4. I have a 1 year old external Hard drive samsung m8 1TB which I wanted to use in my PS4. the problem is that the hard drive has corrupted twice in past. I used to watch 1080P MKV movies on my Samsung LED TV but it started getting corrupted and unreadable and only way to use it again was to format it and yes I did it twice only. I was using my old PS3 controller usb cable for my hard drive to connect it with my computer or LED TV. My concern is, would I be able to use it on my PS4 without any issue? As it might be the USB cable which would be causing my external hard drive to be corrupted or my LED TV or due to the data which I was containing in my Hard disc. Even If it may corrupt in future, will it damage or affect my PS4 negatively because if it will not harm my PS4 than i will give it a try so I can put back the original PS4 500 GB HDD if my hard disk corrupts again. Thanks!
TheStill wrote:
I wouldn't risk it if the hdd has had problems in the past it will have problems again. Do you want to install hundreds of gigs of data only to discover 3 or 4 months down the line the hdd has gone corrupt again.
1tb hdd are cheap nowadays may as well buy a new one and give yourself peace of mind that you won't have problems a few months down the line.
It wouldn't damage ps4 just cause a bit of inconvenience as you would have to format the drive again. Then spend hours downloading and installing everything again. different subject, how do you have a a sign with your id under your comment how do i get it? -
For All Entries with two tables
Hi All,
Can we use FOR ALL ENTRIES with two tables. for example
SELECT * FROM MKPF INTO TABLE T_MKPF
WHERE BUDAT IN S_BUDAT.
SELECT * FROM MARA INTO TABLE T_MARA
WHERE MTART IN S_MTART AND
MAKTL IN S_MAKTL.
SELECT * FROM MSEG INTO TABLE T_MSEG
FOR ALL ENTRIES IN "T_MKPF AND T_MARA"
WHERE MBLNR EQ T_MKPF-MBLNR AND
MATNR EQ T_MARA-MATNR.
can we do it like this or any other way to do this plz tell. I waitting for your responce.
Thanks
JitendraHi,
u cannot do like this....chek some documentation on it..
1. duplicate rows are automatically removed
2. if the itab used in the clause is empty , all the rows in the source table will be selected .
3. performance degradation when using the clause on big tables.
Say for example you have the following abap code:
Select * from mara
For all entries in itab
Where matnr = itab-matnr.
If the actual source of the material list (represented here by itab) is actually another database table, like:
select matnr from mseg
into corresponding fields of table itab
where .
Then you could have used one sql statement that joins both tables.
Select t1.*
From mara t1, mseg t2
Where t1.matnr = t2.matnr
And T2 ..
So what are the drawbacks of using the "for all entires" instead of a join ?
At run time , in order to fulfill the "for all entries " request, the abap engine will generate several sql statements (for detailed information on this refer to note 48230). Regardless of which method the engine uses (union all, "or" or "in" predicates) If the itab is bigger then a few records, the abap engine will break the itab into parts, and rerun an sql statement several times in a loop. This rerun of the same sql statement , each time with different host values, is a source of resource waste because it may lead to re-reading of data pages.
returing to the above example , lets say that our itab contains 500 records and that the abap engine will be forced to run the following sql statement 50 times with a list of 10 values each time.
Select * from mara
Where matnr in ( ...)
Db2 will be able to perform this sql statement cheaply all 50 times, using one of sap standard indexes that contain the matnr column. But in actuality, if you consider the wider picture (all 50 executions of the statement), you will see that some of the data pages, especially the root and middle-tire index pages have been re-read each execution.
Even though db2 has mechanisms like buffer pools and sequential detection to try to minimize the i/o cost of such cases, those mechanisms can only minimize the actual i/o operations , not the cpu cost of re-reading them once they are in memory. Had you coded the join, db2 would have known that you actually need 500 rows from mara, it would have been able to use other access methods, and potentially consume less getpages i/o and cpu.
In other words , when you use the "for all entries " clause instead of coding a join , you are depriving the database of important information needed to select the best access path for your application. Moreover, you are depriving your DBA of the same vital information. When the DBA monitors & tunes the system, he (or she) is less likely to recognize this kind of resource waste. The DBA will see a simple statement that uses an index , he is less likely to realize that this statement is executed in a loop unnecessarily.
Beore using the "for all entries" clause and to evaluate the use of database views as a means to:
a. simplify sql
b. simplify abap code
c. get around open sql limitations.
check the links
http://www.thespot4sap.com/articles/SAPABAPPerformanceTuning_ForAllEntries.asp
The specified item was not found.
Regards,
Nagaraj -
Just wondering how people out there manage working from two machines. I have an MBA that I take on the road and use when I'm sick of my office and want a change of scenery. And, I work on an iMac at my home office.
I'm new to Aperture, and am wondering how people work between a laptop and desktop. How do you sync up files? My MBA hard drive is obviously small, so I'd like to just just keep some core photos on it or maybe even just my most recent photos to work with along with a few older albums.
Any suggestions or techniques for workflow and syncing between machines?Although various user workarounds exist, the issue of synching your laptop Library with your desktop Library has not (yet) been addressed by Apple. IMO Apple's failure (still) to address this key issue is a travesty; Apple's single-user Filemaker has had that capability since the 1980's.
I suggest going to "Provide Aperture Feedback" under the Aperture menu and requesting that Apple provide single-user synch capabilities for two Libraries (such as the laptop/desktop setups that you and I both have). Note that it is important to specify single-user, two-Libraries, because multi-user scenarios are entirely different solutions that - unlike single user solutions - are usually very complex and expensive.
Laptop drives are now available with up to 500 GB capacity, so you may want to consider upgrading the size of your internal laptop drive and using the removed stock drive for backup in an external case. In addition to added speed, the extra internal drive space can allow temporary internal storage of Referenced Masters while in the field if that is desired; or for help with whatever workaround Library-synch methodology is chosen.
Some workarounds include
• Exporting total projects that include Masters from your laptop Aperture for usage on your desktop Aperture.
• Keeping a single Aperture Library on a large external hard drive, and moving the external hard drive among computers. Obviously not ideal for portability, and substantial slowdown usually occurs because in most cases connection is by some method much slower than SATA. New Macbooks with their limitation to only USB are the worst.
I ask that Aperture users with two Macs go to "Provide Aperture Feedback" under the Aperture menu and advise Apple of our need for single-user synch of two Libraries.
Thanks!
-Allen Wicks -
Using PalmVx with two computers
I have been using a PalmVx with my Desktop computer (WIN XP Prof) and also with my laptop (WIN XP Prof). I recently formatted the HDD of my laptop and have re-installed my palmOne software ver 4.1.4 on my laptop. While installing the palmOne software in my laptop when asked for <User Name> I gave the same Username as in my desktop computer. So now my laptop indicates the identical Username as my desktop computer.
My desktop computer is connected to the palm cradle using a serial connection while my laptop is connected through a Serial-to-USB adaptor to a USB port on my laptop.
I need to have all my data in my PalmVx transferred to my laptop, so I set all the conduits in my laptop to "Handheld overwrites Desktop" and carried out a Hotsync.
The Hotsync dialog that comes up on the laptop shows a UserName <blank> instead of the Username that I set (similar to the desktop).
Please advise how I can get all my data currently on my desktop and in my handheld into my laptop?
TIA
Post relates to: Palm VxActually, there are several articles on the web about the fact that you CAN
synch the itunes with two computers. Music, Video, and Ringtones can be done from one computer, and Mail, Contacts, etc. can be done from a second computer.
Just do a Yahoo search on "synching iPhone with two computers."
If you are trying to do music from two computers, you are right, that will not work. There is a program, which I think the Yahoo search above will also uncover that allows you to do a "swap," where you can have the songs from one computer show up on the iPhone, and when you swap, the songs from the other computer show up. I am not sure if this utility survived the upgrage to version 2.0 of the softweare.
cheers,
Ray
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