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Re: raid5 rebuild time

To: Robin Humble <rjh@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
Subject: Re: raid5 rebuild time
From: "Martin K. Petersen" <mkp@xxxxxxxxxxxxx>
Date: 19 Mar 2001 18:58:08 -0500
Cc: linux-xfs@xxxxxxxxxxx
In-reply-to: <200103192330.XAA01298@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
Organization: Linuxcare, Inc.
References: <200103192330.XAA01298@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
Sender: owner-linux-xfs@xxxxxxxxxxx
User-agent: Gnus/5.0808 (Gnus v5.8.8) XEmacs/21.1 (Canyonlands)
>>>>> "Robin" == Robin Humble <rjh@xxxxxxxxxxxxxxxxxxxxxxxxxxx> writes:

Robin> This is more a RAID5 question than an XFS one, but perhaps it's
Robin> relevant anyway - I'm not sure - I'm a bit of a novice at
Robin> RAID5.

Robin> It's running at a speed of ~1300K/sec...

My recent RAID changes seem to have caused a bigger performance
penalty than expected.  But only on some configurations.  My box at
works blasts away on both SCSI and FC-AL.  And here at home my testbox
crawls during resync.

I've begun fixing the stripe cache.  That should hopefully get things
accelerated a bit.

-- 
Martin K. Petersen, Principal Linux Consultant, Linuxcare, Inc.
mkp@xxxxxxxxxxxxx, http://www.linuxcare.com/
SGI XFS for Linux Developer, http://oss.sgi.com/projects/xfs/

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