Performance and Compatability questions

Hi everybody,
I'm hoping no one minds me asking these basic questions.
These past few years I've been using my a linksys WRT54GS (I'm pretty sure that's it) and it has been cutting out almost non-stop as of recently, almost every 15 minutes or less (which tends to be annoying). So I decided to start looking into new routers, and I thought that perhaps the Airport Extreme might be a good alternative.
My first question is, my family is mixed between MACs and PCs. I was wondering if anyone has had any experience with using both systems on the router, and if they have had any major problems because of it (cutting out, or not getting signals at all)? But the other thing is, I'm usually in the basement, with the linksys on the first floor, which comes to roughly 70 feet away.
My next question is, that the MACs in my house are first gen. Intel based MACs, so I don't believe any of them have wireless-n support (I think you need Intel Core 2 Duo Processor, which ours are not), will that cause any problem with the wireless links, I had read that routers with wireless-n have to be backwards compatible, but I don't know i thats true or not, so would our MACs be able to connect?
The final question I have, is will the airport extreme work with a PS3? It can pick up the linksys router (when the router isn't crashing, which is rare), but is it compatible with it as well?
I've read some reviews and it seems to get pretty good ratings, but I figured I'd ask my specific questions before making a purchase.
Thanks.

My first question is, my family is mixed between MACs and PCs. I was wondering if anyone has had any experience with using both systems on the router, and if they have had any major problems because of it (cutting out, or not getting signals at all)?
Of course everyones situation is different, but I currently have no issues connecting both Macs and PCs to my 802.11n AirPort Extreme Base Station (AEBSn). I recently replaced a Linksys 802.11a/g wireless access point with the AEBSn. I left it in its default radio mode, which is "802.11n (b/g compatible)" and my Macs & PCs are a mix of 802.11n and g devices.
But the other thing is, I'm usually in the basement, with the linksys on the first floor, which comes to roughly 70 feet away.
The issue here is really wireless signal strength and the affects of Wi-Fi interference, specifically building material which may make it difficult to get a clean signal through ... so it will affect any manufacturer's router, not just the AirPorts. One test is to use a free utility, like iStumbler to measure the signal strength of your current router from the location in the basement. Any new router may perform as poorly if this signal level is very low.
My next question is, that the MACs in my house are first gen. Intel based MACs, so I don't believe any of them have wireless-n support (I think you need Intel Core 2 Duo Processor, which ours are not), will that cause any problem with the wireless links,
No, the AEBSn will support 802.11a/b/g/n clients.
The final question I have, is will the airport extreme work with a PS3?
The PS3 has built-in 802.11g so it should be compatible as well.

Similar Messages

Infoset - Performance and Design Question .

Hello BW Gurus,
I have a question regarding the infoset.
We have a backlog report designed as follows:
sd_c03 - with around 125 chracteristics and kf's - daily load will have around 10 K records at a time.
custome cube - say - zcust01 with around 50 characters and KF's.- daily full load aroun 15 K records.
My question:
1.We have infoset ontop of this 2 cubes for reporting. Can we use infoset for reporting .I used infoset for master data and DSO reporting. Do you guys see any performance issue with using the infoset instead of multiprovider. Is there any alternative instead of reporting from infoset.
2.Also I executed the SAP_INFOCUBE_DESIGNS program for the above cube and some dimesions are more then 25% like 58%, 75%,even 102%. So this has to be fixed for sure. Is it correct.if we don't change the design then what will be the consequences.
Please advise. We are in the development and the objects are not yet moved to production yet.Again thanks for your help in advance.
Senthil

Hi......
1.We have infoset ontop of this 2 cubes for reporting. Can we use infoset for reporting .I used infoset for master data and DSO reporting. Do you guys see any performance issue with using the infoset instead of multiprovider. Is there any alternative instead of reporting from infoset
Multiproviders are a great tool that can be used freely to "combine" data without adding much overhead to the system. You may need to combine data of different applications (like Plan and Actual). Another good use is from a data modeling point of view...you can enable "partitioning" of the data by using separate cubes for separate years of data. This way the cube are more manageable, and with an InfoProvider on top the data can be combined for reports if reqd (instead of having one huge cube with all the data).
Also using a multiprovider as an 'umbrella' infoprovider, you can easily make changes to underlying InfoProviders with minimum imapct to the queries.
You should go for multi-provider when the requirement is to report on combined data coming from different infoproviders.
Multi-providers combines data using union operation, that means all values of underlying infoproviders are taken into consideration. On ther other hand, Infoset works on the principle of join. Join forms the intersection and only the common data from underlying infoprovider are considerd..............In terms of performance infoset is better since it fetch less number of records.........
Check this .........
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/2f5aa43f-0c01-0010-a990-9641d3d4eef7
2.Also I executed the SAP_INFOCUBE_DESIGNS program for the above cube and some dimesions are more then 25% like 58%, 75%,even 102%. So this has to be fixed for sure. Is it correct.if we don't change the design then what will be the consequences
If Dimensions are more it effects query performance.........its better to change the design........
Hope this helps........
Regards,
Debjani.........

Groupwise 8 on Server 2008R2 SP1 Performance and Defrag Questions

I am running GroupWise 8.0.2 on an HP DL360G G7 with 24 GB of RAM and Dual Xeon X5650 processors under Server 2008 R2 Sp1. Post Office is using roughly 562 GB of an 819 GB Disk located on an HP p2000 g3 SAS connected enclosure comprised of 12 x 146 GB (15k rpm) SAS disks in a RAID 10 configuration. Typically never more than 700 users connected to the Post Office at any time. I am experiencing client slowness at regular intervals. Roughly every three weeks. The solution tends to be to restart the server and give it a fresh start, which holds for a while.
Concerns.
1. When the server restarts I see minimal memory utilization maybe 1.5 GB within half an hour the Used memory climbs a bit to about 2GB but free memory is quickly pre-allocated to standby memory. Within about 2 hours the Free memory is all consumed and I have about 20+ GB of Standby Memory. Running RAMMap indicates that the memory is being used by Metafile and Mapped File, Which tells me that the Post Offices files are being indexed and cached into RAM. Then after a couple weeks go by the amount of active RAM exceeds 8GB (still mostly Metafile, not so much Mapped File). And standby RAM still consumes the remaining RAM between Metafile and Mapped file, leaving no free memory. Typically once I reach about 8GB of memory actively used by the system (mostly Metafile), it's time for performance to drop for the clients.
Also, I'm seeing increases in Disk Queue Length for the Post Office Volume. Typically below 2 rarely as high as 5,
I suspect my best solution is to start a regular defrag process as my volume is now 29% defragmented [yeah NTFS :( ]
Question:
I am concerned a defrag could take as much if not longer than 10 hours. Which is too long for the agents to be down. So I was wondering if anyone had used DiskKeeper or alternative 3rd party Defrag utilities that might be able to defrag open files in the background, or if anyone had run defrag with the agents running to get the defragable files, then shut down the agents for a second pass which should be considerably shorter. Any advice that can be offered, or other suggestions for my described issue, would be greatly appreciated.
Thank You!

In article <[email protected]>, Matt Karwowski wrote:
> I am running GroupWise 8.0.2 on an HP DL360G G7 with 24 GB of RAM and Dual Xeon X5650
> processors under Server 2008 R2 Sp1. Post Office is using roughly 562 GB of an 819
> GB Disk ... I am experiencing client slowness at regular intervals. Roughly every
> three weeks. The solution tends to be to restart the server and give it a fresh start,
A) Updating to latest code may assist as this could also be a memory fragmentation type
issue or such that has been fixed
B) Perhaps even more RAM might help. How much space do the ofuser/*.db and ofmsg/*.db files
take up? The more mail flows, the more of those DB file content are held in memory. A few
versions ago, you tended to need as much RAM as the total of the DB files, and while those
days are gladly past, it is still a good number to watch out for.
C) Explore Caching mode for at least some of the users as that significantly reduces the
load on a server.
> I suspect my best solution is to start a regular defrag process as my volume is now
> 29% defragmented [yeah NTFS :( ]
Still way better than old FAT ;)
This is one of the reasons why GroupWise runs better on Linux with either EXT3 or NSS
volume types, and is why SLES is provided along with your GroupWise license.
As for running Defragments, even running it for just a few hours a week will gradually
help, especially if you can fit in one big burst near the beginning. So if you can automate
the process of shut down agents, run defrag for X hours and then shut it down, then restart
the agents, you may clear this all up. Just having the agents down an hour a week might
clear the memory usage issue for you.
I would be very hesitant to run any defrag on open database files of any email system
unless the defrag tool knew explicitly about that email system. But a smart defragger that
can keep the *.db files in their own (fastest) section of the drive and the rest off to the
side would go a long way to making the defragmentation process much more efficient.
I haven't directly run a GroupWise system on any flavor of Windows, since OS/2, so this is
more a combination of all my platform knowledge, but I hope it gets you closer to a smooth
running system. And if the other GW on Windows admins can pipe in, all the better.
Andy Konecny
KonecnyConsulting.ca in Toronto
Andy's Profile: http://forums.novell.com/member.php?userid=75037

Advanced Mini-Dock 250410U power supply and compatibility questions.

I just purchased a new T400 2764-CTO which has the discrete video. I replaced a three year old T43 with a screen that failed. Lenovoi told me my two port replicators for the T43 would work on the T400. That proved to be an error. So now I am in the market for a T400 port replicator. I am looking at the Lenovo Thinkpad Advanced Mini-Dock 250410U. I have purchased two power supplies and so do not need another power supply. I don't trust Lenovo for an accurate answer.
My questions: Can I purchase an Advanced Mini Dock without the power supply? And secondly, will this Mini-dock work with the T400 2764-CTO. (I am running Vista Business as my sole OS.)
Thanks for any help.
Solved!
Go to Solution.

yes, 250410U is the correct part number for the advanced mini dock compatible with the T400.
it is sold with an a/c adapter and unfortunately cannot be purchased separately. you could, however, resell the adapter if you don't want it. forum.thinkpads.com has a free marketplace if you're interested.
ThinkStation C20
ThinkPad X1C · X220 · X60T · s30 · 600

Performance and Server questions

Can anyone tell me how the Performance of Dev 6 really is over
the internet? We would really like to have our application run
over the web. Also what would be recommended OAS server
requirements - memory etc to have acceptable speed. Has anyone
had any problems with this? Has anyone successfully deployed
their application with the 3 teir architecture? Are there any
white papers that address this that I can look at?
Thanks.
null

Can anyone tell me how the Performance of Dev 6 really is over
the internet? We would really like to have our application run
over the web. Also what would be recommended OAS server
requirements - memory etc to have acceptable speed. Has anyone
had any problems with this? Has anyone successfully deployed
their application with the 3 teir architecture? Are there any
white papers that address this that I can look at?
Thanks.
null

Tiger upgrade and compatibility question

PowerBook 17" 1.5ghz 1GB RAM Osx 10.3.9
I am thinking of upgrading from Panther to Tiger but want to know if some of my software will still work. I have the following software that I am concerned about:
InDesign 2.02
Illustrator 10
Photoshop 7
QuarkXpress 6
Macromedia MX suite
Microsoft Office X:mac
Any feedback appreciated, thanks.

All of those programs will work fine with Tiger on your hardware.

Performance issue and functional question regarding updates on tables

A person at my site wrote some code to update a custom field on the MARC table that was being copied from the MARA table. Here is what I would have expected to see as the code. Assume that both sets of code have a parameter called p_werks which is the plant in question.
data : commit_count type i.
select matnr zfield from mara into (wa_marc-matnr, wa_marc-zfield).
update marc set zfield = wa_marc-zfield
     where werks = p_werks and matnr = wa_matnr.
commit work and wait.
endselect.
I would have committed every 200 rows instead of every one row, but here's the actual code and my question isn't around the commits but something else. In this case an internal table was built with two elements - MATNR and WERKS - could have done that above too, but that's not my question.
            DO.
              " Lock the record that needs to be update with material creation date
              CALL FUNCTION 'ENQUEUE_EMMARCS'
                EXPORTING
                  mode_marc      = 'S'
                  mandt          = sy-mandt
                  matnr          = wa_marc-matnr
                  werks          = wa_marc-werks
                EXCEPTIONS
                  foreign_lock   = 1
                  system_failure = 2
                  OTHERS         = 3.
              IF sy-subrc <> 0.
                " Wait, if the records not able to perform as lock
                CALL FUNCTION 'RZL_SLEEP'.
              ELSE.
                EXIT.
              ENDIF.
            ENDDO.
            " Update the record in the table MARC with material creation date
            UPDATE marc SET zzdate = wa_mara-zzdate
                       WHERE matnr = wa_mara-matnr AND
                             werks = wa_marc-werks.    " IN s_werks.
            IF sy-subrc EQ 0.
              " Save record in the database table MARC
              CALL FUNCTION 'BAPI_TRANSACTION_COMMIT'
                EXPORTING
                  wait   = 'X'
                IMPORTING
                  return = wa_return.
              wa_log-matnr   = wa_marc-matnr.
              wa_log-werks   = wa_marc-werks.
              wa_log-type    = 'S'.
              " text-010 - 'Material creation date has updated'.
              wa_log-message = text-010.
              wa_log-zzdate = wa_mara-zzdate.
              APPEND wa_log TO tb_log.
              CLEAR: wa_return,wa_log.
            ELSE.
              " Roll back the record(un save), if there is any issue occurs
              CALL FUNCTION 'BAPI_TRANSACTION_ROLLBACK'
                IMPORTING
                  return = wa_return.
              wa_log-matnr   = wa_marc-matnr.
              wa_log-werks   = wa_marc-werks.
              wa_log-type    = 'E'.
              " 'Material creation date does not updated'.
              wa_log-message = text-011.
              wa_log-zzdate = wa_mara-zzdate..
              APPEND wa_log TO tb_log.
              CLEAR: wa_return, wa_log.
            ENDIF.
            " Unlock the record from data base
            CALL FUNCTION 'DEQUEUE_EMMARCS'
              EXPORTING
                mode_marc = 'S'
                mandt     = sy-mandt
                matnr     = wa_marc-matnr
                werks     = wa_marc-werks.
          ENDIF.
Here's the question - why did this person enqueue and dequeue explicit locks like this ? They claimed it was to prevent issues - what issues ??? Is there something special about updating tables that we don't know about ? We've actually seen it where the system runs out of these ENQUEUE locks.
Before you all go off the deep end and ask why not just do the update, keep in mind that you don't want to update a million + rows and then do a commit either - that locks up the entire table!

The ENQUEUE lock insure that another program called by another user will not update the data at the same time, so preventing database coherence to be lost. In fact, another user on a SAP correct transaction, has read the record and locked it, so when it will be updated your modifications will be lost, also you could override modifications made by another user in another luw.
You cannot use a COMMIT WORK in a SELECT - ENDSELECT, because COMMIT WORK will close each and every opened database cursor, so your first idea would dump after the first update. (so the internal table is mandatory)
Go through some documentation like [Updates in the R/3 System (BC-CST-UP)|http://help.sap.com/printdocu/core/Print46c/en/data/pdf/BCCSTUP/BCCSTUP_PT.pdf]
Regards

Xserve disks and RAID questions

I have an Intel Xserve with its two original 750 GB disks. These are configured as RAID 1 (mirror).
I intend to purchase an identical disk as a hot spare and upgrade two old G4s with four each of the same disks as reserve web servers/backup.
The original disks are Seagate ST3750640NS which I can buy for £140 although the Apple price is £386 including the disk carrier. Apple refuses to sell the disk carriers separately.
The PCI boards I have found are:
http://firmtek.stores.yahoo.net/sata1v4.html
and
http://www.sonnettech.com/product/temposatax4i.html
costing $120 and $200 respectively.
There are PC boards as cheap as $20 but these may have bootability and compatibility issues. There appears to be little information about the proportion of hard/soft RAID resulting from any of these boards.
My questions are:
1 - Is there an inexpensive way of buying disk carriers for recent Xserves?
2 - Are there alternative satisfactory PCI boards?
3 - Do such boards differ much in terms of RAID types supported?
4 - Do such boards differ much in terms of the degree to which they are host computer independent? - ie more hard than soft and hence, presumably, faster.

>1 - Is there an inexpensive way of buying disk carriers for recent Xserves?
I'm not aware of any sources other than Apple (at least that I'd trust).
>2 - Are there alternative satisfactory PCI boards?
There are several manufacturers who make PCI RAID cards that you can use. You've listed two, but there are others including the RocketRAID series, and those from ACard.
>3 - Do such boards differ much in terms of RAID types supported?
In my opinion, you get what you pay for.
Cheap cards may support RAID 0 and 1, while more expensive cards may add RAID 5. This may or may not be important for you if you're just mirroring.
There are going to be performance differences between each card. Since you're using G4's, though, you're going to have other bottlenecks, so disk speed isn't likely to be a big factor.
>4 - Do such boards differ much in terms of the degree to which they are host computer independent? - ie more hard than soft and hence, presumably, faster.
If you get a card that works in a Mac, it's likely to also work in other hardware. The same can not necessarily be said the other way around - cheap PC-centric cards may not support Macs, mostly because of driver issues.
Note that you may also have issues with booting - not all cards can create bootable volumes which may leave you out in the cold if you don't check that first.

ADMs, SSD and Noise questions

Hi,
Does anyone here have a current generation xserve that they could vouch for in terms of noise compared to a mac pro?
I've got two 1TB drives (enterprise drives, SATA) right now and I'd love to just throw them in the xserve, is that possible or do I need sleds from apple?
SSD, can it be added later by apple or IT staff, or does it have to be ordered with the machine (built in?)
Thanks

Here's the Xserve versus Mac Pro acoustical output (decibel, dB) discussion mentioned: [messageID=9292211|http://discussions.apple.com/thread.jspa?messageID=9292211]
As for your question on drive compatibility and swaps, that's been the subject of a number of discussions around disks and sleds and drive compatibility; dig around a little. A particular storage widget might work flawlessly, it might mostly work just fine, it might be a little flaky, or it might not work at all. Most drive swaps "mostly work" or better, but I've seen both extremes of that range. Check the other discussions.
No one can predict the compatibility of a third-party drive. Usual or normal or likely, yes. But whether it works or not takes testing. And most third-party drives won't match up with SMART reporting for errors and such; that area tends to be very vendor-specific.
As for your SSD question, the Xserve disk drives (and ignoring third-party compatibility discussions here) are usually a trivially easy swap. If you'd like to know if Apple has those now available aftermarket and specifically with end-user installation, ask Apple.
There's some value in the extra cost of the vendor drives; you're paying the vendor to perform the compatibility testing and support. Or you get to pay that cost for your own integration and testing, if you follow that path.

Looking for a high-performance and reliable NAS

Hi,
I have been searching for a high-performance and reliable SOHO NAS storage but I have seen very mixed and contradicting reviews for the products I have looked at so far. From QNAP to Synology to etc.
However I've not found a good review for Promise SOHO NAS devices such NSx700 and NSx600.
Is anybody here using them? If so how would you rate these devices?
Thanks in advance,
Behrang

My g/f is using a Synology 1511+ with 2TB WB black drives - set up for 2 disk redundancy.
http://www.synology.com/us/products/DS1511+/index.php
She has her lightroom images on there and it works very well with her MBP 10.6.8
If you have specific questions, please ask
Michael

Performance and Stability Problem with PE9

I just upgraded my computer to a Core i5 with 8G of memory and everything is running much faster. But my NEW PE9 just run very slow. Some of the simple tasks take 10-30 second to complete. Even Windows 7 will often come out to ask if I want to wait for PE9 to wake up or kill the process. When I want to change the size of a video clip, it just doesn't work at all due to performance. It will take PE9 20-30 seconds to resize the video clip. Without some realtime feedback of the size, it is impossible to do the resizing and this is a very fundamental operation. PE9 often crash or seize up as well, I didn't have any of these problem with PE3.0. I upgraded to PE9 simply because my PE3.0 for WIndows XP is not comletely compatible with Windows 7 (some of the text displace does not show up).
Do anyone else have issue with performance and stability?

Some general comments, and reading (some for PPro, but concepts are the same)
http://forums.adobe.com/thread/416679
Some specific information that is needed...
Brand/Model Computer (or Brand/Model Motherboard if self-built)
How much system memory you have installed, such as 2Gig or ???
Operating System version, such as Win7 64bit Pro... or whatevevr
-including your security settings, such as are YOU the Administrator
-and have you tried to RIGHT click the program Icon and then select
-the Run as Administrator option (for Windows, not sure about Mac)
Your Firewall settings and brand of anti-virus are you running
Brand/Model graphics card, sush as ATI "xxxx" or nVidia "xxxx"
-or the brand/model graphics chip if on the motherboard
-and the exact driver version for the above graphics card/chip
-and how much video memory you have on your graphics card
Brand/Model sound card, or sound "chip" name on Motherboard
-and the exact driver version for the above sound card/chip
Size(s) and configuration of your hard drive(s)... example below
-and how much FREE space is available on each drive (in Windows
-you RIGHT click the drive letter while using Windows Explorer
-and then select the Properties option to see used/free space)
While in Properties, be sure you have drive indexing set OFF
-for the drive, and for all directories, to improve performance
My 3 hard drives are configured as... (WD = Western Digital)
1 - 320G WD Win7 64bit Pro and all programs
2 - 320G WD Win7 swap file and video projects
3 - 1T WD all video files... read and write
Make sure you have the default Windows hard drive indexing set to OFF for all hard drives and folders
Some/Much of the above are available by going to the Windows
Control Panel and then the Hardware option (Win7 option name)
OR Control Panel--System--Hardware Tab--Device Manager for WinXP
Plus Video-Specific Information http://forums.adobe.com/thread/459220?tstart=0
And, finally, the EXACT type and size of file that is causing you problems
-for pictures, that includes the camera used and the pixel dimensions
Read Bill Hunt on a file type as WRAPPER http://forums.adobe.com/thread/440037?tstart=0
What is a CODEC... a Primer http://forums.adobe.com/thread/546811?tstart=0
What CODEC is INSIDE that file? http://forums.adobe.com/thread/440037?tstart=0
For PC http://www.headbands.com/gspot/ or http://mediainfo.sourceforge.net/en
This is aimed at Premiere Pro, but may help
Work through all of the steps (ideas) listed at http://forums.adobe.com/thread/459220?tstart=0
If your problem isn't fixed after you follow all of the steps, report back with ALL OF THE DETAILS asked for in the FINALLY section at the troubleshooting link
Also, tuning Win7
http://www.pcworld.com/businesscenter/article/220753/windows_7_godmode_tips_tricks_tweaks. html
Temp/Cookie Cleaner http://www.mixesoft.com/
http://forums.adobe.com/thread/789809?tstart=0
Win7 Toolbar http://WindowsSecrets.com/comp/110210
More Win7 Tips http://windowssecrets.com/comp/110127
Utilities http://windowssecrets.com/comp/110106 (Startup Solutions)
Win7 Help http://social.technet.microsoft.com/Forums/en-US/category/w7itpro/
Win7 Configuration Article http://windowssecrets.com:80/comp/100218
Win7 Monitor http://windowssecrets.com:80/comp/100304
Win7 Optimizing http://www.blackviper.com/Windows_7/servicecfg.htm
Win7 Virtual XP http://www.microsoft.com/windows/virtual-pc/
More on Virtual XP http://blogs.zdnet.com/microsoft/?p=5607&tag=col1;post-5607
Win7 Adobe Notes http://kb2.adobe.com/cps/508/cpsid_50853.html#tech
Win7 Adobe Update Server Problem http://forums.adobe.com/thread/586346?tstart=0
An Adobe Win7 FAQ http://forums.adobe.com/thread/511916?tstart=0
More Win7 Tips/FAQ http://forums.adobe.com/thread/513640?tstart=0
Processes http://technet.microsoft.com/en-us/sysinternals/bb896653.aspx
Compatibility http://www.microsoft.com/windows/compatibility/windows-7/en-us/Default.aspx
Win7 God Mode http://forums.adobe.com/thread/595255?tstart=0
CS5 Install Error http://forums.adobe.com/thread/629281?tstart=0
CS5 Help Problem http://kb2.adobe.com/cps/842/cpsid_84215.html
Win7 and Firewire http://forums.adobe.com/thread/521842?tstart=0
http://lifehacker.com/5634978/top-10-things-to-do-with-a-new-windows-7-system
http://www.downloadsquad.com/2009/05/29/7-free-windows-7-tweaking-utilities/
Win7 64bit Crashing and "a" fix http://forums.adobe.com/thread/580435?tstart=0
http://prodesigntools.com/if-any-problems-downloading-or-installing-cs5.html
Harm's Tools http://forums.adobe.com/thread/504907
Also http://www.tune-up.com/products/tuneup-utilities/
Also http://personal.inet.fi/business/toniarts/ecleane.htm

Does Final Cut Express 4 work with mac mini and other questions...?

I have a few questions I need help in answering... I would appreciate opinions on the following:
I am about to make a purchase of a new mac. I already have a mac mini PPC, but it is too slow...
Here is what I am thinking.
Mac mini, 2GB mem, 160GB hard drive. Will this new mac mini work with Final Cut Express 4?
Or should I go with the more powerful iMac?
I like to make movies on my mac but I hate iMovie 08 so I constantly use iMovie HD 06. Should I go to Final Cut Express 4 or just stick with iMovie HD 06?

There is no doubt that FCE 4 will run on an Intel mini - the GMA graphics processor is compatible. There is also no doubt that an iMac would give you somewhat better overall performance, though it's important perhaps to note that as complex as FCE is, it is actually a little less demanding on hardware than iMovie has traditionally been, so the difference between a mini with 2Gb RAM and a similarly equipped iMac will not be all that great in FCE, though it will become a little more noticeable if you continue to use iMovie 6.
The main reason for the performance difference between iMovie and FCE is that in order to provide a reasonably sophisticated video editing package that will run on very basic hardware, Apple relied heavily on caching techniques, meaning that while FCE basically spools from video and relies on CPU power, iMovie constantly moves data to and from the hard drive. The mini's hard drive is a (relatively) slow device in comparison to the iMac's - thus the iMac runs iMovie rather more seamlessly. In FCE, the difference is, as said, rather less clear unless you were to go for the top-end model.
If your budget can stretch to an iMac it makes sense to go that route simply because the extra power and overall performance (and the better graphics processor) will give you greater flexibility down the road. On the other hand, if funds are tight and you need to spend as little as reasonably possible, a mini will do fine, and is sufficient;y inexpensive that in a couple of years could be sold off and replaced without severe financial implications.
In terms of the choice between FCE or iMovie, beware that if you haven't used FCE before, the transition is not easy, and the learning curve for it is pretty steep. That said, it has far greater power and flexibility in terms of what you can achieve with it than has ever been possible with iMovie.
That said, for casual and home use, iMovie (version 6 at least) has plenty of power and tools for the majority of projects. iMovie 8 is, in many ways, deeply flawed for those who want that sort of power and workflow tools, being that it is designed for quick and easy creation of movies, not creative and considered productions. It has it's uses, but if you have experience with iMovie already, v8 is really not intended for you at all.
All that said, I've used iMovie 6 on systems will a lot less power than the current Intel minis, and have found it stable and workable, so I have no doubt it would work well on any current Mac.

FAQ's, intros and memorable discussions in the Performance and Tuning Forum

Welcome to the SDN ABAP Performance and Tuning Forum!
In addition to release dependent information avalaible by:
- pressing the F1 key on an ABAP statement,
- or searching for them in transaction ABAPDOCU,
- using the [SDN ABAP Development Forum Search|https://www.sdn.sap.com/irj/sdn/directforumsearch?threadid=&q=&objid=c42&daterange=all&numresults=15&rankby=10001],
- the information accessible via the [SDN ABAP Main Wiki|https://wiki.sdn.sap.com/wiki/display/ABAP],
- the [SAP Service Marketplace|http://service.sap.com] and see [SAP Note 192194|https://service.sap.com/sap/support/notes/192194] for search tips,
- the 3 part [How to write guru ABAP code series|https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/f2dac69e-0e01-0010-e2b6-81c1e8e5ce50] ... (use the search to easily find the other 2 documents...)
... this "sticky post" lists some threads from the ABAP forums as:
- An introduction for new members / visitors on topics discussed in threads,
- An introduction to how the forums are used and the quality expected,
- A collection of some threads which provided usefull answers to questions which are frequently asked, and,
- A collection of some memorable threads if you feel like reading some ABAP related material.
The listed threads will be enhanced from time to time. Please feel welcome to post to [this thread|Suggestions thread for ABAP FAQ sticky; to suggest any additional inclusions.
Note: When asking a question in the forum, please also provide sufficient information such that the question can be answered usefully, do not repeat interview-type questions, and once closed please indicate which solution was usefull - to help others who search for it.

ABAP Performance and Tuning
Read Performance => Gurus take over the discussion from Guests caught cheating the points-system.
SELECT INTO TABLE => Initial questions often result in interesting follow-up discussions.
Inner Joins vs For all Entries. => Including infos about system parameters for performance optimization.
Inner Join Vs Database view Vs for all entries => Usefull literature recommended by performance guru YukonKid.
Inner Joins vs For All Entries - performance query => Performance legends unplugged... read the blogs as well.
The ABAP Runtime Trace (SE30) - Quick and Easy => New tricks in old tools. See other blogs by the same author as well.
Skip scan used instead of (better?) range scan => Insider information on how index access works.
DELETE WHERE sample case that i would like to share with you => Experts discussing the deletion of data from internal tables.
Impact of Order of fields in Secondary index => Also discussing order of fields in WHERE-clause
"SELECT SINGLE" vs. "SELECT UP TO 1 ROWS" => Better for performance or semantics?
into corresponding fields of table VERSUS into table => detailed discussion incl. runtime measurements
Indexes making program run slower... => Everything you ever wanted to know about Oracle indexes.
New! Mass reading standard texts (STXH, STXL) => avoiding single calls to READ_TEXT for time-critical processes
New! Next Generation ABAP Runtime Analysis (SAT) => detailed introduction to the successor of SE30
New! Points to note when using FOR ALL ENTRIES => detailed blog on the pitfall(s) a developer might face when using FAE
New! Performance: What is the best way to check if a record exist on a table ? => Hermann's tips on checking existence of a record in a table
Message was edited by: Oxana Noa Zubarev

Where's the music on iTunes, and what's with the quality and compatibility?

I'm just curious as to whether anyone else has had this issue or not: Does anyone else feel like, after searching for specific songs, there's just little to nothing in the database? I feel like most of my searches are pointless because iTunes has either no data of my requested search and/or only has bits and pieces of it.
Another question I have: After having a slightly successful search, why am I left with low quality tunes? I mean, you can hear the compression... badly. (I know it's not my speakers)
Last question: If I'm paying for the song, shouldn't I be allowed to download a universal file? iTunes uses a unique format that no other application uses. In other words, more money has to be spend for m4a to mp3 converters (unless you're a cracker [not a racial comment]).
To me, I value iTunes and its team, so I'm sorry if I've offended anyone. I understand there are contracts involved with the artists and it's hard to please ALL of the subscribers. But seriously, where's the music on iTunes, and what's with the quality and compatibility?
Custom Windows XP Pro Negative, I am a meat popsicle.

Today I thought of finally putting lyrics on my songs. So I've been quite some time busy doing that, then I tried it on my iPad (2) and I can't find them. Just as the people above say. Then I went to search where I can find them and I found this page. I'm really dissapointed and I don't understand how something like this could happen. So I hope Apple will fix this soon.
(I'm just posting this so that Apple will do something about it)

SQL Performance and Security

Help needed here please. I am new to this concept and i am working on a tutorial based on SQL performance and security. I have worked my head round this but now i am stuck.
Here is the questions:
1. Analyse possible performance problems, and suggest solutions for each of the following transactions against the database
a) A manager of a project needs to inspect total planned and actual hours spent on a project broken down by activity.
e.g
Project: xxxxxxxxxxxxxx
Activity Code          planned     actual (to date)
     1          20          25
     2          30          30
     3          40          24
Total               300          200
Note that actual time spent on an activity must be calculated from the WORK UNIT table.
b)On several lists (e.g. list or combo boxes) in the on-line system it is necessary to identify completed, current, or future projects.
2. Security: Justify and implement solutions at the server that meet the following security requirements
(i)Only members of the Corporate Strategy Department (which is an organisation unit) should be able to enter, update and delete data in the project table. All users should be able to read this information.
(ii)Employees should only be able to read information from the project table (excluding the budget) for projects they are assigned to.
(iii)Only the manager of a project should be able to update (insert, update, delete) any non-key information in the project table relating to that project.
Here is the project tables
set echo on
* Changes
* 4.10.00
* manager of employee on a project included in the employee on project table
* activity table now has compound key, based on ID dependence between project
* and activity
drop table org_unit cascade constraints;
drop table project cascade constraints;
drop table employee cascade constraints;
drop table employee_on_project cascade constraints;
drop table employee_on_activity cascade constraints;
drop table activity cascade constraints;
drop table activity_order cascade constraints;
drop table work_unit cascade constraints;
* org_unit
* type - for example in lmu might be FACULTY, or SCHOOL
CREATE TABLE org_unit
ou_id               NUMBER(4)      CONSTRAINT ou_pk PRIMARY KEY,
ou_name          VARCHAR2(40)     CONSTRAINT ou_name_uq UNIQUE
                         CONSTRAINT ou_name_nn NOT NULL,
ou_type          VARCHAR2(30) CONSTRAINT ou_type_nn NOT NULL,
ou_parent_org_id     NUMBER(4)     CONSTRAINT ou_parent_org_unit_fk
                         REFERENCES org_unit
* project
CREATE TABLE project
proj_id          NUMBER(5)     CONSTRAINT project_pk PRIMARY KEY,
proj_name          VARCHAR2(40)     CONSTRAINT proj_name_uq UNIQUE
                         CONSTRAINT proj_name_nn NOT NULL,
proj_budget          NUMBER(8,2)     CONSTRAINT proj_budget_nn NOT NULL,
proj_ou_id          NUMBER(4)     CONSTRAINT proj_ou_fk REFERENCES org_unit,
proj_planned_start_dt     DATE,
proj_planned_finish_dt DATE,
proj_actual_start_dt DATE
* employee
CREATE TABLE employee
emp_id               NUMBER(6)     CONSTRAINT emp_pk PRIMARY KEY,
emp_name          VARCHAR2(40)     CONSTRAINT emp_name_nn NOT NULL,
emp_hiredate          DATE          CONSTRAINT emp_hiredate_nn NOT NULL,
ou_id               NUMBER(4)      CONSTRAINT emp_ou_fk REFERENCES org_unit
* activity
* note each activity is associated with a project
* act_type is the type of the activity, for example ANALYSIS, DESIGN, BUILD,
* USER ACCEPTANCE TESTING ...
* each activity has a people budget , in other words an amount to spend on
* wages
CREATE TABLE activity
act_id               NUMBER(6),
act_proj_id          NUMBER(5)     CONSTRAINT act_proj_fk REFERENCES project
                         CONSTRAINT act_proj_id_nn NOT NULL,
act_name          VARCHAR2(40)     CONSTRAINT act_name_nn NOT NULL,
act_type          VARCHAR2(30)     CONSTRAINT act_type_nn NOT NULL,
act_planned_start_dt     DATE,
act_actual_start_dt      DATE,
act_planned_end_dt     DATE,
act_actual_end_dt     DATE,
act_planned_hours     number(6)     CONSTRAINT act_planned_hours_nn NOT NULL,
act_people_budget     NUMBER(8,2)      CONSTRAINT act_people_budget_nn NOT NULL,
CONSTRAINT act_pk PRIMARY KEY (act_id, act_proj_id)
* employee on project
* when an employee is assigned to a project, an hourly rate is set
* remember that the persons manager depends on the project they are on
* the implication being that the manager needs to be assigned to the project
* before the 'managed'
CREATE TABLE employee_on_project
ep_emp_id          NUMBER(6)     CONSTRAINT ep_emp_fk REFERENCES employee,
ep_proj_id          NUMBER(5)     CONSTRAINT ep_proj_fk REFERENCES project,
ep_hourly_rate      NUMBER(5,2)      CONSTRAINT ep_hourly_rate_nn NOT NULL,
ep_mgr_emp_id          NUMBER(6),
CONSTRAINT ep_pk PRIMARY KEY(ep_emp_id, ep_proj_id),
CONSTRAINT ep_mgr_fk FOREIGN KEY (ep_mgr_emp_id, ep_proj_id) REFERENCES employee_on_project
* employee on activity
* type - for example in lmu might be FACULTY, or SCHOOL
CREATE TABLE employee_on_activity
ea_emp_id          NUMBER(6),
ea_proj_id          NUMBER(5),
ea_act_id          NUMBER(6),
ea_planned_hours      NUMBER(3)     CONSTRAINT ea_planned_hours_nn NOT NULL,
CONSTRAINT ea_pk PRIMARY KEY(ea_emp_id, ea_proj_id, ea_act_id),
CONSTRAINT ea_act_fk FOREIGN KEY (ea_act_id, ea_proj_id) REFERENCES activity ,
CONSTRAINT ea_ep_fk FOREIGN KEY (ea_emp_id, ea_proj_id) REFERENCES employee_on_project
* activity order
* only need a prior activity. If activity A is followed by activity B then
(B is the prior activity of A)
CREATE TABLE activity_order
ao_act_id          NUMBER(6),
ao_proj_id          NUMBER(5),
ao_prior_act_id      NUMBER(6),
CONSTRAINT ao_pk PRIMARY KEY (ao_act_id, ao_prior_act_id, ao_proj_id),
CONSTRAINT ao_act_fk FOREIGN KEY (ao_act_id, ao_proj_id) REFERENCES activity (act_id, act_proj_id),
CONSTRAINT ao_prior_act_fk FOREIGN KEY (ao_prior_act_id, ao_proj_id) REFERENCES activity (act_id, act_proj_id)
* work unit
* remember that DATE includes time
CREATE TABLE work_unit
wu_emp_id          NUMBER(5),
wu_act_id          NUMBER(6),
wu_proj_id          NUMBER(5),
wu_start_dt          DATE CONSTRAINT wu_start_dt_nn NOT NULL,
wu_end_dt          DATE CONSTRAINT wu_end_dt_nn NOT NULL,
CONSTRAINT wu_pk PRIMARY KEY (wu_emp_id, wu_proj_id, wu_act_id, wu_start_dt),
CONSTRAINT wu_ea_fk FOREIGN KEY (wu_emp_id, wu_proj_id, wu_act_id)
          REFERENCES employee_on_activity( ea_emp_id, ea_proj_id, ea_act_id)
/* enter data */
start ouins
start empins
start projins
start actins
start aoins
start epins
start eains
start wuins
start pmselect
I have the tables containing ouins and the rest. email me on [email protected] if you want to have a look at the tables.

Answer to your 2nd question is easy. Create database roles for the various groups of people who are allowed to access or perform various DML actions.
The assign the various users to these groups. The users will be restricted to what the roles are restricted to.
Look up roles if you are not familiar with it.

Performance and Compatability questions

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