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.
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