From: Goswin von Brederlow <goswin-v-b@web.de>
To: John Robinson <john.robinson@anonymous.org.uk>
Cc: NeilBrown <neilb@suse.de>, Linux RAID <linux-raid@vger.kernel.org>
Subject: Re: Poor write performance with write-intent bitmap?
Date: Wed, 22 Apr 2009 11:16:16 +0200 [thread overview]
Message-ID: <87d4b5m4kf.fsf@frosties.localdomain> (raw)
In-Reply-To: <49ED2BC3.7050109@anonymous.org.uk> (John Robinson's message of "Tue, 21 Apr 2009 03:13:23 +0100")
John Robinson <john.robinson@anonymous.org.uk> writes:
> Can't do that, my root filesystem is on the RAID-5, and part of the
> reason for wanting the bitmap is because the md can't be stopped while
> shutting down, so it was always wanting to resync at startup, which is
> rather tedious.
Normal shutdown should put the raid in read-only mode as last step. At
least Debian does that. That way even a mounted raid will be clean
after reboot.
I would also suggest restructuring your system like this:
sdX1 1GB raid1 / (+/boot)
sdX2 rest raid5 lvm with /usr, /var, /home, ...
Both / and /usr can usualy be read-only preventing any filesystem
corruption and raid resyncs in that part of the raid.
MfG
Goswin
next prev parent reply other threads:[~2009-04-22 9:16 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-20 17:12 Performance of a software raid 5 Johannes Segitz
2009-04-20 23:46 ` John Robinson
2009-04-21 0:10 ` Johannes Segitz
2009-04-21 0:52 ` John Robinson
2009-04-21 1:05 ` Johannes Segitz
2009-04-21 1:12 ` John Robinson
2009-04-21 1:19 ` NeilBrown
2009-04-21 2:04 ` Johannes Segitz
2009-04-21 5:46 ` Neil Brown
2009-04-21 12:40 ` Johannes Segitz
2009-04-24 13:49 ` Johannes Segitz
2009-04-26 17:03 ` Johannes Segitz
2009-04-21 18:56 ` Corey Hickey
2009-04-22 12:29 ` Bill Davidsen
2009-04-22 22:32 ` Corey Hickey
2009-04-22 9:07 ` Goswin von Brederlow
2009-04-21 0:44 ` Poor write performance with write-intent bitmap? John Robinson
2009-04-21 1:33 ` NeilBrown
2009-04-21 2:13 ` John Robinson
2009-04-21 5:50 ` Neil Brown
2009-04-21 12:05 ` John Robinson
2009-05-22 23:00 ` Redeeman
2009-04-22 9:16 ` Goswin von Brederlow [this message]
2009-04-22 12:41 ` John Robinson
2009-04-22 14:02 ` Goswin von Brederlow
2009-04-23 7:48 ` John Robinson
2009-04-22 14:21 ` Andre Noll
2009-04-23 8:04 ` John Robinson
2009-04-23 20:23 ` Goswin von Brederlow
2009-04-21 16:00 ` Bill Davidsen
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