Messages in this thread | | | Date | Tue, 26 Feb 2008 13:33:36 -0500 | From | Chris Snook <> | Subject | Re: Performance problems with 3ware 9500S-4LP and 2.6.25-rc3 |
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Andre Noll wrote: > we are experiencing massive performance problems with two of our > Linux servers that contain 3ware controllers on a Tyan mainboard and > a couple of 1T disks. > > During the daily cron job that uses rsync to sync a 500G file system > from another machine to the raid on the 3ware controller the load > jumps up, and the machine becomes sluggish as hell. For example, an > ssh login to that machine takes minutes to complete and ldap becomes > unreliable while the rsync job is running. Even Nagios complains > about the machine being down while rsync is running.
You're putting your box under astronomical load. This is generally regarded as a bad idea, regardless of how well your storage controller is performing. Can you measure the single-threaded throughput (say, coping one huge file, and then syncing) to give us a baseline performance figure? rsync will happily peg your box, your network, and your cat if you let it.
-- Chris
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