software RAID-0 recommendations

[Douglas Furlong]

On Tue, 2004-09-07 at 21:22 -0400, Matthew Miller wrote:
> On Tue, Sep 07, 2004 at 03:11:37PM -0500, Christopher J. Bottaro wrote:
> > > all RAID 0 does is double your chance of catastrophic
> > > drive failure.
> > what about doubling your read/write speed?  =P
> > p.s. i do understand that you won't get exactly linear speedup for each hard
> > drive added to a RAID-0, but i'm just sayin...
> 
> It's unlikely to be even close to linear. I'd be surprised if you get a
> real-world performance improvement of 10%. It just ain't worth it.
If you create the RAID 0 in striped mode then the read/write speed for
large files is substantially increased. I believe, in the region of 70%
-> 80%. However I can't remember exactly off the top of my head.

However, if you don't use striped raid 0 (if you loose a disk there is a
marginally better chance of recovering data). Then there is absolutely
NO speed performance, but you do get larger volumes.

-- 
Douglas Furlong
Systems Administrator
Firebox.com
T: 0870 420 4475        F: 0870 220 2178
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 189 bytes
Desc: This is a digitally signed message part
URL: <http://listman.redhat.com/archives/fedora-list/attachments/20040908/76ee3461/attachment-0001.sig>