ASM and IBM's SVC (SAN Volume Controller)

Has anyone used ASM on SVC?
Can anyone point me in the direction of any documentation regarding ASM and SVC.
Any assistance greatly appreciated.
Gavin Rayner

Hi,
I am also looking at recommendations for using IBM's SVC with AIX. (We are not using ASM in this instance).
Can anyone post their experiences, tips and lessons learnt using this disk architecture?
Cheers.

Similar Messages

11.2 ASM and IBM HACMP

Hi,
We are looking to upgrade our Oracle database server cluster from 10.2.0.3 to 11.2 this year. The 10.2.0.3 setup currently uses filesystems/datafiles and IBM's HACMP fails over to backup node.
I would like to convert everything to ASM but we don't want to purchase RAC. If I install the 11.2 Grid Infrastructure for a Standalone Server will I be able to failover ASM to the backup node via IBM HACMP?
Thanks
Tom

Hi Tom,
Oracle Clusterware and ASM are free when used with an Oracle Database regardless of RAC. In other terms, you do not need to purchase a RAC option to use Oracle Clusterware or ASM free of charge. Hence, if you want to have a failover cluster to manage your DB in a failover manner, you could use Oracle Clusterware to do that. On http://otn.oracle.com/clusterware you will find more information regarding this setup.
The benefit for you would be: Once you have Oracle Clusterware, you can cluster ASM (all free of charge) and you would not need to fail it over using HACMP anymore. The professional version of this configuration is called Oracle RAC One node, available with 11.2. But for earlier versions, this setup might do. Note the support situation for this configuration, if you do not use RAC One Node as described, in Support Note 790189.1 You could even get rid of HACMP on these machines, since you plan on using ASM anyways.
If you choose to use HACMP to fail over ASM, you need to ask IBM whether they have a solution (agent) for that.
Hope that helps. Thanks,
Markus

About ASM and SAN...

Hello Guys,
I have to implement 3 nodes RAC 10gR2 ob centOS4 operating system. I have study so many documents about rac instaltion and configurations. I have learn how to set the network requirements with private, public and virtual IPs and all other stuff. I have learn installtion of clusterware and database with cluster enable functionality.
BUT the storage options are still not clear to me. We have purchases SAN and we are planning to implement ASM for the storage. Now i want to know:
How many disk and disk partitions 3 node structure will require on SAN?
How ASM will access SAN, or you can say OS will access this shared storage?
Voting disk and OCR can not be store on sharted storage and need to be store on raw devices... what these raw device can be? How it can be access by all nodes?
Above three questions are disturbing me a lot. If they are clear to me the whole storage concept will be clear and i can implement RAC.
Please help me by answering the above 3 questions. I will be vert greatful to you.
Regards,
Imran

How many disk and disk partitions 3 node structure will require on SAN?
There's no real answer to that! With Oracle generally, RAC or no RAC, the answer to how many disks you should have is "as many as possible". Partitioning is really up to you, too, depending on what you find easiest to manage. If you have a single SAN array, for example, comprised of 15 disks that you choose to partition into three or four logical volumes so that you can call one 'data', one 'redo', one 'OS', and one 'other' -that's entirely up to you, since Oracle could care less how you partition, what you call them or how many of them there are. Moreover, everything on every partition is being striped across those 15 disks anyway, so who cares?
I think, however, you might be thinking of the RAC-specific issues of the voting disk and the Oracle Cluster Registry. If you were using a cluster file system, they could be just two files on the file system, about 120M in size between them. Since you are going to use ASM and these two elements can't be stored inside an ASM array, you'll have to create two raw partitions for this purpose. The rest you then chop up for ASM's use.
It is NOT true, incidentally, that "Voting disk and OCR can not be store on sharted storage". By definition, the voting disk and OCR must be on shared storage! Indeed, raw partitions, ASM arrays and cluster file systems are ALL shared storage technologies. It just so happens that those two files can't use ASM... but raw or cfs are fine.
A raw partition is not, of course, intrinsically 'shared storage'... but if it's a raw partition on your SAN, to which all three of your nodes are physically attached, then it is shareable. It's shareable simply because three nodes can see it. And because there's no file system there with exclusive and blocking file locks, what one node does to a raw partition doesn't stop another node accessing it simultaneously (which is the definition of shared storage, of course).
How will ASM access SAN? By you partitioning the SAN into a number of logical volumes, each one of which will be kept raw, and you then declaring each such volume as a candidate disk. You'll wrap all candidate disks up into an ASM disk group... and then Oracle will write to that disk group and hence through to the underlying logical volumes. Which comes back to the original question: how many logical volumes should you create out of, say, a 15 disk LUN on a SAN?
Depends, as I said, on a lot of things, but for example RAID5 runs best when there are either 5 or 9 disks in the array (or did when last I looked at an EMC Clariion SAN!). So if your underlying RAID technology was going to be RAID5, you might well create 3 5-disk logical volumes on the one LUN. To let ASM use all 15 disks, you'd then create a 3-disk diskgroup (where 1 ASM disk = 1 SAN logical volume). On the other hand, you might want to keep some disks back for future storage, in which case a 1-disk ASM diskgroup representing a single 9-disk logical volume might be the go, with the remaining 6 disks on the LUN available for future expansion.
It's a complicated topic, unfortunately. You're dealing with physical storage which is already abstracted into logical volumes and then abstracted even further by wrapping those logical volumes up into ASM disk groups. You balance performance, expandability, management convenience, your SAN vendor's optimisation tricks and so on... and hopefully come out with something that works for you!

Head phone volume controlls and iPod Touch 1G.

I just bought some of the new head phones with the Volume controlls, mic, and phause / play controll on the wire. It works fine with my dads iPhone but it does nothing with my 1G iPod Touch. Is it suppose to work with an iPod Touch or just the iPhones? Please help.

The 1st gen touch headphone jack doesn't have the same functionality as the 2nd and 3rd gen touch. You can't use remotes or input audio through it, but it's a distinction of the model of ipod touch, not a distinction between ipod touch and iphone.
http://discussions.apple.com/thread.jspa?threadID=2033076&tstart=0

Placing Rac db redologs members on san disks ASM and local scasi disks

Hi
Kindly advice if should I face a performance problem case I placed db redologs members one on ASM and the 2nd on Local server scasi disk.
Thanks

As long as you would have the local disk not being into contention due to any other files being present or just being slow, you should be fine. But make sure that you do have the local disk in such a way that it's visible to the other node as well because that would be required in the case of recovery.
HTH
Aman....

Need for multiple ASM disk groups on a SAN with RAID5??

Hello all,
I've successfully installed clusterware, and ASM on a 5 node system. I'm trying to use asmca (11Gr2 on RHEL5)....to configure the disk groups.
I have a SAN, which actually was previously used for a 10G ASM RAC setup...so, reusing the candidate volumes that ASM has found.
I had noticed on the previous incarnation....that several disk groups had been created, for example:
ASMCMD> ls
DATADG/
INDEXDG/
LOGDG1/
LOGDG2/
LOGDG3/
LOGDG4/
RECOVERYDG/
Now....this is all on a SAN....which basically has two pools of drives set up each in a RAID5 configuration. Pool 1 contains ASM volumes named ASM1 - ASM32. Each of these logical volumes is about 65 GB.
Pool #2...has ASM33 - ASM48 volumes....each of which is about 16GB in size.
I used ASM33 from pool#2...by itself to contain my cluster voting disk and OCR.
My question is....with this type setup...would doing so many disk groups as listed above really do any good for performance? I was thinking with all of this on a SAN, which logical volumes on top of a couple sets of RAID5 disks...the divisions on the disk group level with external redundancy would do anything?
I was thinking of starting with about half of the ASM1-ASM31 'disks'...to create one large DATADG disk group, which would house all of the database instances data, indexes....etc. I'd keep the remaining large candidate disks as needed for later growth.
I was going to start with the pool of the smaller disks (except the 1 already dedicated to cluster needs) to basically serve as a decently sized RECOVERYDG...to house logs, flashback area...etc. It appears this pool is separate from pool #1...so, possibly some speed benefits there.
But really...is there any need to separate the diskgroups, based on a SAN with two pools of RAID5 logical volumes?
If so, can someone give me some ideas why...links on this info...etc.
Thank you in advance,
cayenne

The best practice is to use 2 disk groups, one for data and the other for the flash/fast recovery area. There really is no need to have a disk group for each type of file, in fact the more disks in a disk group (to a point I've seen) the better for performance and space management. However, there are times when multiple disk groups are appropriate (not saying this is one of them only FYI), such as backup/recovery and life cycle management. Typically you will still get benefit from double stripping, i.e. having a SAN with RAID groups presenting multiple LUNs to ASM, and then having ASM use those LUNs in disk groups. I saw this in my own testing. Start off with a minimum of 4 LUNs per disk group, and add in pairs as this will provide optimal performance (at least it did in my testing). You should also have a set of standard LUN sizes to present to ASM so things are consistent across your enterprise, the sizing is typically done based on your database size. For example:
300GB LUN: database > 10TB
150GB LUN: database 1TB to 10 TB
50GB LUN: database < 1TB
As databases grow beyond the threshold the larger LUNs are swapped in and the previous ones are swapped out. With thin provisioning it is a little different since you only need to resize the ASM LUNs. I'd also recommend having at least 2 of each standard sized LUNs ready to go in case you need space in an emergency. Even with capacity management you never know when something just consumes space too quickly.
ASM is all about space savings, performance, and management :-).
Hope this helps.

Installing oracle 11.2 rac with IBM Storwize V7000 san with aix 6.1

Has and one deployed 11g rac with IBM Storwize V7000 san with aix 6.1
Is this possible using Oracle CRS without going for OS cluster like GPFS

Hi lbn76,
Has and one deployed 11g rac with IBM Storwize V7000 san with aix 6.1
Is this possible using Oracle CRS without going for OS cluster like GPFS
I hope same thing will work with AIX 6.1 alsoNo problem, the procedure of installation of clusterware is the same in any AIX Platform.
If you are using Clusterware 11.2 you can (should) use ASM Diskgroup to place your clusterware files and database files. If you want use Cluster Filesystem to any other purpose you can use ACFS feature of ASM.
The Storage will be transparent to the ASM, the Luns will be mapped to AIX and ASM (Oracle) will manage the read and write.
The Storage Storwize have several great features, but are transparent to the ASM. The ASM will only see the LUNs provided by AIX.
Regards,
Levi Pereira

RAC with ASM and without ASM

Hi all,
we planing to install RAC 11g instance active/active . and we are using SAN storage RAID 10.
I know ASM is nice feature . but it need more maintenance in future . This is what I see
it from Manual and training . for patching ..... because it maintain as instance.
why I do need ASM since I have SAN and I can control mirroring ...etc
I need sold answer here ?? why I need to use this feature that already can be covered using another facility like SAN.
Best Regards,

What I have found in a RAC world is there is maintenance no matter which way you go, A cluster file system will require upgrades, patches, etc. RAW volumes will require extra effort in allocation, etc. as well as increase the number of files in the database. ASM requires additional instance on each node to maintain which is quite simple and rolling patches in ASM is becoming reality slowly. I have found that removing the management of RAW volumes is more trouble then the maintenance of the ASM instances and the added benefits of ASM outweigh the maintenance for sure. I found that the cluster file system mainteance is pretty well a wash.
As for ASM being widely used, the most recent RAC clusters (last 3) I have built have all been ASM....... 1 on HPUX and 2 on Linux (Red Hat and Oracle Enterprise Linux) and future clusters coming up that I know of are all going to be ASM as well. While it may be true that a lot of existing RAC environments have not yet gone to ASM almost all new RAC environments are. It is certainly taking hold. If you look at the effort on a large database to move to ASM from RAW volumes or cluster file system it can appear to be a lot of work and that is true, but in the long run my experience with ASM has been positive therefore I would not hesitate to recommend new RAC clusters be built with ASM and existing clusters should have a migration plan in place. As with some cluster file systems like veritas, GPFS, etc. There is addtional cost involved where ASM does not have the additional cost so moving existing clusters can save $$........ RAM volumne management may not fall on the DBA but someone has to manage all those volumnes at a SAN level and that is additional management just may not really be with the DBA.
Just my additional 2 cents worth.
Hope this helps.

Can't mount SAN volume 'cause it already shows mounted.. but it's not

after controller 1 had a problem and controller 2 took over, one volume on one client (of 6) won't mount.
all volumes on all other clients OK..
the error says it's already mounted and looking at
ls -al /Volumes
it's there..
looking at df , it's not
looking at finder, it's not
running diskutil unmount , it's not
(or mount -u)
so I can't unmount what's there cause it's not there and I can't mount what's not mounted cause it thinks it already is mounted .
any ideas ??

after a MDC fail-over the finder sometimes creates an alias file with the name of the san volume. after all it's a broken alias.
disconnect the FC cable. in the finder (or terminal), go to /Volumes and remove the broken alias file.
cu. p.

Timeouts increased after we moved USR, SAP data files and TLogs to new SAN

We are having issues with timeouts after we moved our USR, SAP SQL Datafiles and SAP Transaction Logs from our old SAN to a new SAN.
Timeouts for SAPGUI users are set to 10 minutes.
We are running Windows Server 2003 with SQL Server 2005.
The SAP database has 8 datafiles with a total size of about 350GB.
Procedure we used to move SAP to new SAN:
1. Attached 3 new SAN Volumes
     -a. USR
     -b. Data Files
     -c. Transaction Logs
2. Shutdown SAP and SQL services
3. Alligned the new volumes with a 1024kb offset and gave the Data files and Transaction log volumes a 64kb allocation
    size. (The alignment and 64kb allocation size were not setup for these volumes on the old SAN)
4. Copied the 3 volumes from old to new.
5. Changed the new volumes drive letter to the drive letters of the old volumes.
     -a. I had to restart in order to change the USR volume.
     -b. Because of this I had to resetup the sapmnt and saploc shares.
6. Started SQL services and then SAP services and everything came up just fine.
The week before we had anywhere from 1 to 9 timeouts per day.
This week: Monday had 20 and Tuesday had 26.
On Monday we saw that MD07 was the only transaction that was timing out, but Tuesday had others as well.
The amount of users in the system is about the same. The amount of orders going in are about the same. No big transports went in right before we switched.
Performance counters that I know about for disk look a lot better on the Data Files.
- PAGEIOLATCH_SH ms/request is about 50% better
- Under I/O Performance in DBACOCKPIT:
- MS/OP is now anywhere from 5 to 30 - Old SAN: 50 to 300
- The Hit Ratio is over 99% - same as the old SAN
Looking at Wiley Introscope graphs:
- The "SAP Host: Average queue length" is about 30% to 40% lower then the old SAN.
- the "SAP Host: Disk utilization in %" is about the same.
Questions:
1. Did we do anything wrong or miss anything with our move procedure?
     a. Do we have to do anything in SQL since we changed volumes even though we kept the drive letters the same?
2. What other logs or performance counters should I be looking at?
Thank you,
Neil

Our new SAN Vendor is Compellent. They have been fantastic. I would highly recommend checking them out.
The reasons for the timeouts had nothing to do with the SAN...Well kind of anyway.
I decided to check t-code SM20 to see what users were doing when these timeouts were happening. What I found was the program R_BAPI_NETWORK_MAINTAIN was being called thousands of times in a matter of 10 to 15 minutes at random times through out the day. It would take up about 50 to 80 percent of the amount of programs being executed during these times.
So, I sent this information to our developers and they found out that R_BAPI_NETWORK_MAINTAIN was being called from another program that was looping thousands of times. The trigger to stop the loop wasn't happening fast enough. They made a change and we haven't seen the timeouts since.
I think that the performance increases allowed the loop to run faster which caused the slow downs and timeouts to happen more often.
Thank you to everyone for their help!
Neil

How can i make the volume controller on a pavillion dv4 work after a clean windows install?

Hello!
Recently I performed a clean windows 7 install from a windows install disk I previously owned, the problem is that this disk didn't intalled the drivers and programs specific for this computer. What I want to know is which driver or program I need to install to make the volume controller on my computer to work again? The problem is that the volume bar that previously appeared on the screen and the "bing" sound indicating the volume level doesn't appear or sound now.
All other things seem to work fine, this is the only problem so far.
Thanks!

Hi,
Try downloading and installing the latest HP OSD Utility on the following link.
http://ftp.hp.com/pub/softpaq/sp55001-55500/sp55152.exe
After the installation has completed, restart the notebook.
Regards,
DP-K
****Click the White thumb to say thanks****
****Please mark Accept As Solution if it solves your problem****
****I don't work for HP****
Microsoft MVP - Windows Experience

Headphones volume controller not working on new macbook pro

Hello,
I recently purchased a new macbook pro (15" late 2013) and just noticed that when plugging my headphones (beats solo HD), the volume controller in the headphones doesn't change the volume of the laptop. The headphone controller works fine on my iphone, and on my older macbook pro (2010, running on mavericks too). I checked the Sound settings under System Preferences, and under the Input tab, the new macbook doesn't recognize the headphone microphone either, which my old macbook pro still does. In terms of sound, the headphones work well, and under the Output tab, the Headphones appear, as normal. The sound can also be adjusted using the keyboard keys and the volume adjust on screen, but not with the headphones volume controller, which seems odd to me.
Is there a way to fix this?
Thanks for your time!
Melissa

Hi,
I also noticed this... when I use my old earphones (the white Apple ones that come with the iphone) on my new laptop, everything works fine, including the microphone, volume control, skipping songs... etc. But my other headphones are not recognised at all, just as audio output and nothing else.
My old macbook, however, still fully recognizes both my old earphones and my "troublesome" Beats headphones, even after the latest system update, as does my iphone
So I still don't know what is happening.
Just telling you this so that you make 100% sure your earphones are faulty before discarding them!

No sound volume controller in Satellite L750 Series

I just bought a new Satellite L750-A057 laptop, and found a very stupid design issue that it is has no volume controller ! ONLY WINDOWS one, so If I'm in a middle of any full screen application, I must exit or switch to desktop to lower the volume !! and same for any other situation !!
So, any recommendation about how could I control the sound volume with function keys for example ?

It seems you are right. There is no additional volume controller which would allow to set the sound volume up and down
In many cases the Toshiba Multimedia buttons contain an up and down volume buttons but it seems that the L750 does not support such buttons too
Thats shame :(

Where Can I Find A Volume Controller For A Gigaworks G500/550W??? Help!

I have been trying everywhere to get hold of a remote/volume controller for a G500/G550W.
It seems nowhere on Earth has one? can Anybody help me?

*BUMPS*
I'm looking for a volume controller too. The wires in my controller snapped and the speakers (G500) don't work anymore!

How can x86 Solaris detect a expanded SAN volume

I have a x86 solaris box (SunOS jdnm01cdr01s 5.10 Generic_137112-02 i86pc i386 i86pc) that connects to a SAN volume with initial 10G space.
I increases the volumn size to 20GB.
Format commands displays the name is updated to 20G.
AVAILABLE DISK SELECTIONS:
       0. c0t600A0B800039BE61000016894ACD4D2Ad0 <SUN-LCSM100_F-0617-20.00GB>
          /scsi_vhci/disk@g600a0b800039be61000016894acd4d2aHowever, the partition tool is still report the wrong size.
Current partition table (original):
Total disk sectors available: 20955101 + 16384 (reserved sectors)
Part      Tag    Flag     First Sector        Size        Last Sector
0        usr    wm                34       9.99GB         20955101
1 unassigned    wm                 0          0              0
2 unassigned    wm                 0          0              0
3 unassigned    wm                 0          0              0
4 unassigned    wm                 0          0              0
5 unassigned    wm                 0          0              0
6 unassigned    wm                 0          0              0
8   reserved    wm          20955102       8.00MB         20971485
format> label
Ready to label disk, continue? yes
partition> p
Current partition table (original):
Total disk sectors available: 20955101 + 16384 (reserved sectors)
Part      Tag    Flag     First Sector        Size        Last Sector
0        usr    wm                34       9.99GB         20955101
1 unassigned    wm                 0          0              0
2 unassigned    wm                 0          0              0
3 unassigned    wm                 0          0              0
4 unassigned    wm                 0          0              0
5 unassigned    wm                 0          0              0
6 unassigned    wm                 0          0              0
8   reserved    wm          20955102       8.00MB         20971485How does it detect the new size?

The disk is running in ZFS and has data on it.
Does it harmful if I modify the VTOC label?
I get the following from the server. Shall I extend the slice up to 41943039?
# prtvtoc /dev/rdsk/c0t600A0B800039BE61000016894ACD4D2Ad0s2
* /dev/rdsk/c0t600A0B800039BE61000016894ACD4D2Ad0s2 partition map
* Dimensions:
*     512 bytes/sector
* 41943039 sectors
* 20971452 accessible sectors
* Flags:
*   1: unmountable
* 10: read-only
*                          First     Sector    Last
* Partition Tag Flags    Sector     Count    Sector Mount Directory
       0      4    00         34 20955068 20955101
       8     11    00   20955102     16384 20971485

ASM and IBM's SVC (SAN Volume Controller)

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