[CentOS] 40TB File System Recommendations

Thu Apr 14 11:20:25 UTC 2011
Peter Kjellström <cap at nsc.liu.se>

On Wednesday, April 13, 2011 04:54:01 AM Ross Walker wrote:
> On Apr 12, 2011, at 8:53 AM, Rudi Ahlers <Rudi at SoftDux.com> wrote:
> > As matter of interest, what hardware do you use? i.e. what CPU's, size
> > of RAM and RAID cards do you use on this size system?
> > 
> > Everyone always recommends to use smaller RAID arrays than one big fat
> > one. So, I'm interested to know what you use, and how effective it
> > works. i.e. if that 30TB was actively used by many hosts how does it
> > cope? Or is it just archival storage?
> I would never create a RAID5/6 greater then 8 disks. Usually I create a 6
> or 7 disk RAID5 which means I can fit 2 in a 15 disk enclosure and have a
> hot spare and stripe them.

Personal preference here, personal preference there. Here's a datapoint: We 
run >PB of data on 12 drive raid6 using sata (no hot spare). Are we happy with 
that config: yes, would it be faster to use 15K sas in raid10: yes *shrug*

> The more RAID5 sets you have the greater the write IOPS you can achieve.
> Though for max IOPS nothing beats RAID10.
> -Ross
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 198 bytes
Desc: This is a digitally signed message part.
URL: <http://lists.centos.org/pipermail/centos/attachments/20110414/1993ec09/attachment-0003.sig>