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

On Mar 18, 2006, at 1:36 PM, Michael Goettsche wrote:
> 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.

one more RAID 5 caution: RAID 5 does not tolerate multiple disk failures
at all. a well configured RAID 10 setup has a fair chance of surviving
multiple disk failures; with RAID 5, if you lose a second disk before
the
rebuild finishes, you're toast.

RAID can be a good high availability solution; it's no substitute for
proper "traditional" backups, though, so don't install a RAID system
because you don't want to handle tapes or burn CD-R copies.

richard

-- 
Richard P. Welty
rwelty@suespammers.org           518-269-8232
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