[CentOS] question on RAID performance

Fri Apr 11 13:34:19 UTC 2008
Jason <jason at jasonandjessi.com>

while it takes a minimum of 6 disks,  we've had great luck with RAID 50.
 Two separate RAID 5 arrays (fast read, moderate writes) that are then
placed into a RAID 0 (fast read, fast write). you lose 2 drives worth of
space, but lord it's fast and the data is mirrored.  Not sure if you can
do the whole thing in software. I use two 3Ware 9650SE cards to do the
RAID 5 and I do RAID 0 in software.


John J. Lee wrote:
> I am currently running 7 raid10 data servers.  I can say read speed
> increases but I doubt the write speed comparing to non raid setup.
> The main advantage of the raid is redundancy but not
> the performance.  If you want to boost the disk performance, go for
> the faster drive with more than
> 10,000rpm spinning speed.
> -john
> On Thu, Apr 10, 2008 at 8:18 PM, Miguel Medalha <miguelmedalha at sapo.pt> wrote:
>> Have you tried RAID 10? It combines the security of RAID 1 with the speed of
>> RAID 0. dmraid supports this RAID type.
>>> I was wonder what experiences there are out there with using RAID-X for
>>> performance increases. I do use RAID-1 (2 disks) but am interested in
>>> attemtps to gain higher R/W performance. Do the RAID-5's etc give
>> noticeable performace increases?
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