From: Ross S. W. W. <RW...@me...> - 2012-01-19 14:42:13
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On Jan 19, 2012, at 4:54 AM, "James Bewley" <jam...@te...> wrote: > Hi all, > > Just wondering what kind of performance people are getting out of their IET SANs. I have just run a disk IO test on my windows server 2008 R2 server using sqlio and got the following results: > > C:\>sqlio -kR -s300 -dc -b16 -frandom -Fpar > sqlio v1.5.SG > parameter file used: param.txt > file M:\testfile.dat with 1 thread (0) using mask 0x0 (0) > 1 thread reading for 300 secs from file M:\testfile.dat > using 16KB random IOs > size of file M:\testfile.dat needs to be: 3221225472 bytes > current file size: 0 bytes > need to expand by: 3221225472 bytes > expanding M:\testfile.dat ... done. > using specified size: 3072 MB for file: M:\testfile.dat > initialization done > CUMULATIVE DATA: > throughput metrics: > IOs/sec: 118.11 > MBs/sec: 1.84 > > Obviously these are pretty disappointing results, is there anything I can do to improve performance? What's the physical storage configuration? The above test is a single threaded random IO test of 16K sized IOs run for 5min over a 3GB region. In these tests you can ignore the throughput because that isn't important here IOPS is. What application will be using this? SQL or Exchange? Is this for log or database data? I would try again with the thread count set to 4 or 8 and the IO size set to 8K to get a better idea of the number of IOPS your storage can drive. -Ross ______________________________________________________________________ This e-mail, and any attachments thereto, is intended only for use by the addressee(s) named herein and may contain legally privileged and/or confidential information. If you are not the intended recipient of this e-mail, you are hereby notified that any dissemination, distribution or copying of this e-mail, and any attachments thereto, is strictly prohibited. If you have received this e-mail in error, please immediately notify the sender and permanently delete the original and any copy or printout thereof. |