You might try setting zfs_scrub_limit to 1 or 2 and attach a customer service record to :
6494473 ZFS needs a way to slow down resilvering
-r
Le 7 oct. 09 à 06:14, John a écrit :
Hi,We are running b118, with a LSI 3801 controller which is connected to 44 drives (yes it's a lot behind a single controller). We also use a pair of ssd connected to another controller for read cache. Everything works fine and we achieve acceptable performance for our needs. However, during scrubbing or resilvering operations, it seems ZFS generates so much traffic that it overwhelmes the controller. The controller then logs the following errors:Oct 6 07:30:04 nas101 scsi: [ID 107833 kern.warning] WARNING: / p...@0,0/pci8086,6...@4/pci1000,3...@0/s...@16,0 (sd19):Oct 6 07:30:04 nas101 incomplete read- retryingIs there anything that can be done to slow down zfs operations such as resilvering/scrubbing? We tried tuning zfs:zfs_vdev_max_pending but it did not really help. This is a bit frustrating because this configuration works well to serve data. It's just too aggressive when the kernel accesses drives for some operations.Iostat looks liks this:r/s w/s kr/s kw/s wait actv wsvc_t asvc_t %w %b s/w h/w trn tot device 9681.5 37.3 116403.3 35.1 0.0 30.2 0.0 3.1 0 1000 0 21 8 29 c9 420.3 1.5 5058.2 1.4 0.0 1.3 0.0 3.1 0 44 0 0 0 0 c9t8d0Any help would be appreciated. thanks, JJ -- This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
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