Slow dir / Performance.
Hello,
We have 2 Equallogic Systems, And a Dell Servers.
We have every server give a block device home dir , so the user data are on the home dir this is working great its format on xfs filesystem, and running iscsiadm version 2.0-870 with linux kernel 3.10.62
But when we logging on the server, the first time we do a dir command on the home dir, its take a long time when we get feedback on the dir , the next time is fast when we do a dir. Now we have users on this systems and this problem give not good performance on sql and websites an e-mail we are running on the server.
Are the some information how i can fix ore maybe get this problem better under control ?
I hope so that somebody can help me, i am searching for more than 3 weeks now.
Thanks,
Stefan
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Le Tue, 09 Dec 2014 09:26:10 +0100
"Stefan Bottelier | Sharper.nl" <[email protected]> écrivait:
Quoted 7 lines
But when we logging on the server, the first time we do a dir command on the home dir, its take a long time when we get feedback on the dir , the next time is fast when we do a dir.
Now we have users on this systems and this problem give not good performance on sql and websites an e-mail we are running on the server.
I suspect that you're using slow, 7200 RPM drives in RAID-5 or RAID-6, and you're IO bound. Equallogic arrays are notably slow. Easy to use, cheap, and sloooow ("fast, good, cheap, choose two" as the saying go).
What is your drive/RAID configuration? Is the iSCSI link 1GigE or 10 GigE?
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http://oss.sgi.com/mailman/listinfo/xfsQuoted 8 lines · Stefan Bottelier | Sharper.nl
Hello,
We have 2 Equallogic Systems, And a Dell Servers.
We have every server give a block device home dir , so the user data are on the home dir this is working great its format on xfs filesystem, and running iscsiadm version 2.0-870 with linux kernel 3.10.62
Quoted 8 lines
But when we logging on the server, the first time we do a dir command on the home dir, its take a long time when we get feedback on the dir , the next time is fast when we do a dir.
Now we have users on this systems and this problem give not good performance on sql and websites an e-mail we are running on the server.Are the some information how i can fix ore maybe get this problem better under control ?
That's not enough information to diagnose the problem. See:
http://xfs.org/index.php/XFS_FAQ#Q:_What_information_should_I_include_when_reporting_a_problem.3F
Cheers,
Stan
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