From: Iordan Iordanov <iordan@cdf.toronto.edu>
To: Hank Barta <hbarta@gmail.com>
Cc: linux-raid@vger.kernel.org
Subject: Re: RAID for USB flash drives
Date: Tue, 04 Jan 2011 16:22:16 -0500 [thread overview]
Message-ID: <4D238F88.7050908@cdf.toronto.edu> (raw)
In-Reply-To: <AANLkTi=kcbanFit5x27ccS_1RChxC=Dn+Hs4Ak+FbKsX@mail.gmail.com>
Debirf is a project which allows one to create an initrd image which
contains a complete Debian system.
We use debirf to create an image that we then boot from a single USB
stick. We use this to boot a fleet of machines which export iscsi
targets, so we don't have to waste a drive bay for the OS.
http://cmrg.fifthhorseman.net/wiki/debirf
For us, this solution works great, since there is absolutely NO wear on
the stick - the entire OS runs in memory. However, this does mean that
you would have to consider Debian rather than Ubuntu, or find a way to
make debirf work under Ubuntu.
As far as constructing the RAID sets, I would look into using larger
chunks. Our testing showed that in our environment where our requests
are small (of size around 1 - 2kb), large 1MB chunks gave the best
performance. Chunks of size 512kb were a close second in performance for us.
Booting over the network can create certain chicken-and-egg scenarios
which again depend on your environment :).
Cheers,
Iordan
prev parent reply other threads:[~2011-01-04 21:22 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-04 19:40 RAID for USB flash drives Hank Barta
2011-01-04 20:09 ` John Robinson
2011-01-04 20:14 ` Steven Haigh
2011-01-14 23:25 ` Hank Barta
2011-01-15 20:54 ` John Robinson
[not found] ` <AANLkTinQcu8jwKGiYViBP_CE0Hd4UbaO4spvMgnmRoa8@mail.gmail.com>
[not found] ` <4D358490.4020400@anonymous.org.uk>
2011-01-18 13:47 ` Hank Barta
2011-01-17 15:41 ` Iordan Iordanov
2011-01-04 21:22 ` Iordan Iordanov [this message]
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