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Re: Recommendation for Solaris 10 verses Linux & RAID for Subversion Server?

From: Michael Goettsche <mgoettsche_at_svn-hosting.com>
Date: 2006-03-18 19:36:36 CET

On Friday 17 March 2006 16:41, Steve Gardell wrote:
> We have experimented a bit with Subversion and are looking to
> move it into production. I have spent a bit of time in the archives,
> but apologies if this has already been addressed in some not-
> immediately obvious fashion.
> I am looking at either a Sun T2000 server with built-in RAID (0,1) or
> some roughly comparable Dell, also with built-in RAID. We
> anticipate using the FSFS mechanism.
> Is there any compelling reason to pursue one alternative over
> the other? Which Linux?
> Also, I saw one poster strongly recommend RAID 5.
> RAID seems like a no-brainer, but is there really a compelling
> argument for RAID5 this verses RAID 1 or RAID 0,1?
> Thanks in advance.
> Steven Gardell
> Vice President of Engineering, Iperia
> 978-437-3544

Both systems are fine.
An advantage of using Linux - when using a popular Linux distribution - is
that the chance of finding binary builds in the future may be higher than
with Solaris. Additionally, you will find more people being able to assist
you with Linux+Subversion than with Solaris+Subversion.
If you have other reasons to prefer one over the other they can outweigh the
reasons I mentioned, though.

The choice of the RAID level depends on your demands. Do you need RAID
primarily to ensure data safety, do you need it to speed up IO access or do
you need it for both?
If the major reason is data safety you should be fine with a RAID 1 system.
If you need data safety and faster operations, RAID 0+1 is a good choice.
RAID 5 is slower at write operations than the two previous configurations. The
advantage of RAID 5 is that the data is stored redudantly on three disks. The
rebuild process is slower than with RAID 1, though.

Unless your Subversion server will be *extremely* busy or the data safey is
extremely critical you shouldn't need anything other than RAID 1. The
probability of two disks crashing at the same time is very low and in that
case you would still have your nightly backups.

Hope this helps.

Best Regards,
Michael Goettsche
svn-hosting.com - Professional Subversion and Trac Hosting

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Received on Sat Mar 18 19:36:58 2006

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