On 04/13/11 9:51 PM, Emmanuel Noobadmin wrote:
I'm was stuck trying to decide whether to go for the cheaper RAID 5 setup and possibly getting killed by the IOPS penalty and the risk associated with rebuild time, or figure out a way to use the recommended RAID 10 setup with a smaller usable capacity for the budget but do so with the ability to expand in the near future. So really hoping that it could be done.
since this is the centos list, I really didn't want to suggest this, but if I was building a 20 or 40TB or whatever storage server, I do believe I'd be strongly consider using Solaris, or one of its variants like OpenIndiana, with ZFS.
ZFS was engineered from the ground up to scale to zetabytes
# zpool create archive mirror c2t0d0 c2t1d0 mirror c2t2d0 c2t3d0 mirror c3t0d0 c3t1d0 mirror c3t2d0 c3t2d0 ..... spare c?t?d0 c?t?d0
done. available for use in a few seconds. default mountpoint is /archive
# zfs create -o mountpoint=/u01 archive/u01 # zfs create -o mountpoint=/u02 archive/u02
creates a couple more filesystems that share the free space, mounted as /u01 and /u02
adding more disks?
# zpool add archive mirror c7t0d0 c7t1d0 mirror c7t2d0 c7t3d0