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Date: Mon, 5 Nov 2001 16:42:50 +0100 (CET)
From: Roy Sigurd Karlsbakk <roy@karlsbakk.net>
To: Tux mailing list <tux-list@redhat.com>
cc: <linux-kernel@vger.kernel.org>
Subject: Re: Lots of questions about tux and kernel setup
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> If you spec your boxes such that you have extra CPU cycles around after
> TUX is done, consider software raid. Software raid is faster than hardware
> raid in almost every circumstance I have seen, with the caveat that it
> uses slightly more CPU resources (RAID 5 has worst CPU performance because
> of parity calculations, RAID 1 is better)

The only writing to the drives, will be weekly batch jobs running at
night. I originally planned to disable all or at least most loggin, but I
changed my mind to allow for logging to an NFS volume on a separate
management segment. Thus, there's virtually no writing in the system while
it's running. Therefor - again - I'd like to run software RAID 4, as
this'll give me read access to what looks like a RAID 0 (the n-1 data
drives), and although writing will be a pain in the ass, reading will be
fast, and I have some sort of redundancy.

What would you think would be a good stripe size in these circumstances
(>=1GB files)

roy


---
Roy Sigurd Karlsbakk, MCSE, MCNE, CLS, LCA

Computers are like air conditioners.
They stop working when you open Windows.


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