Andre Noll schrieb: > Hi > > 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. Could you give some numbers, please? However there are some known issues: http://forums.storagereview.net/index.php?showtopic=25923 http://tumbleweed.org.za/2007/02/16/horrific-performance-with-3ware-raid Symptons are reasonable performance with large block ops, but really bad performance with small block ops. time (cp -a linux-2.6.24.2 linux-2.6.24.2b; sync) Gives me with some tuning 50 seconds here with a 9650SE in a 4 disk raid5 setup. (very bad, single disk will do it in <30s!!!) But reading and writing large files with large block sizes is usually beyond > 100 MB/s [snipped a lot] > Andre Best regards, Arnd - To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
