From: Russell Coker <russell@coker.com.au>
To: Peter Rabbitson <rabbit+list@rabbit.us>
Cc: linux-raid@vger.kernel.org, pkg-mdadm-devel@lists.alioth.debian.org
Subject: Re: write-intent bitmaps
Date: Tue, 29 Jan 2008 20:40:20 +1100 [thread overview]
Message-ID: <200801292040.23532.russell@coker.com.au> (raw)
In-Reply-To: <479EEE38.9070505@rabbit.us>
On Tuesday 29 January 2008 20:13, Peter Rabbitson <rabbit+list@rabbit.us>
wrote:
> Russell Coker wrote:
> > Are there plans for supporting a NVRAM write-back cache with Linux
> > software RAID?
>
> AFAIK even today you can place the bitmap in an external file residing on a
> file system which in turn can reside on the nvram...
True, and you can also put the journal of a filesystem on a NVRAM device. But
that doesn't give the stripe aggregating benefits for RAID-5 or the general
write-back cache benefits for everything else.
--
russell@coker.com.au
http://etbe.coker.com.au/ My Blog
http://www.coker.com.au/sponsorship.html Sponsoring Free Software development
prev parent reply other threads:[~2008-01-29 9:40 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-27 10:34 write-intent bitmaps Russell Coker
2008-01-27 11:21 ` Neil Brown
2008-01-27 15:12 ` Russell Coker
[not found] ` <479E1BB3.2080702@tmr.com>
2008-01-29 7:32 ` Russell Coker
2008-01-29 9:13 ` Peter Rabbitson
2008-01-29 9:40 ` Russell Coker [this message]
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