Greetings Holger,
From: Holger Kiehl <redacted>
Subject: Re: 3ware escalade vs software raid, from a different jeff
Date: Thu, 19 Feb 2004 11:49:09 +0000 (GMT)
I have a system running for nearly three years distributing some 2.3 million
files with 200GB daily. This is with linux software raid and have encountered
absolutly no problems. During the same period another system (not linux) with
a similar workload but with hardware raid has failed twice, once makeing
all data useless.
I am curious as to which filesystem you are using on that server. I've asked questions on other
mailing lists before regarding journaling filesystems but it's always interesting to see how people
are using them in real-life scenarios. Currently I'm trying to choose between Reiser and XFS.
Kind Regards,
Jeff Gray: the "other" Jeff ;)
_________________________________________________________________
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Hello Jeff
On Mon, 23 Feb 2004, Jeff Gray wrote:
Greetings Holger,
quoted
From: Holger Kiehl <redacted>
Subject: Re: 3ware escalade vs software raid, from a different jeff
Date: Thu, 19 Feb 2004 11:49:09 +0000 (GMT)
quoted
I have a system running for nearly three years distributing some 2.3
million
files with 200GB daily. This is with linux software raid and have
encountered
absolutly no problems. During the same period another system (not linux)
with
a similar workload but with hardware raid has failed twice, once makeing
all data useless.
I am curious as to which filesystem you are using on that server. I've asked
questions on other
mailing lists before regarding journaling filesystems but it's always
interesting to see how people
are using them in real-life scenarios. Currently I'm trying to choose
between Reiser and XFS.
I am using ext2.
Holger
On Mon, 23 Feb 2004 at 5:23pm, Jeff Gray wrote
I am curious as to which filesystem you are using on that server. I've asked
questions on other
mailing lists before regarding journaling filesystems but it's always
interesting to see how people
are using them in real-life scenarios. Currently I'm trying to choose
between Reiser and XFS.
It very much depends on your workload and typical file size. I use XFS on
my big 3ware based servers (2 2TB servers, and 1 1TB), and generally am
*very* pleased with it. It's very popular on the linux-ide-arrays list as
well.
XFS usually is very fast. Where it falls down (at least, I think it's the
culprit) is when you have *lots* of very small files. One directory on
one of my servers is ~450 GB big and has ~3.4M files in ~29K
subdirectories (avg file size 140Kb). Operations on that directory are
noticeably slow. For that sort of workload, I'd think Reiser would
be better.
And lots of folks just stick with ext3. The best answer, of course, is to
test with something that as closely as possible resembles your expected
workload.
--
Joshua Baker-LePain
Department of Biomedical Engineering
Duke University