On Tue, 12 Apr 2011, Marian Marinov wrote:
On Tuesday 12 April 2011 10:36:54 Alain Péan wrote:
Le 12/04/2011 09:23, Matthew Feinberg a écrit :
Hello All
I have a brand spanking new 40TB Hardware Raid6 array to play around
with. I am looking for recommendations for which filesystem to use. I am
trying not to break this up into multiple file systems as we are going
to use it for backups. Other factors is performance and reliability.
CentOS 5.6
array is /dev/sdb
So here is what I have tried so far
reiserfs is limited to 16TB
ext4 does not seem to be fully baked in 5.6 yet. parted 1.8 does not
support creating ext4 (strange)
Anyone work with large filesystems like this that have any
suggestions/recommendations?
Hi Matthew,
I would go for xfs, which is now supported in CentOS. This is what I use
for a 16 TB storage, with CentOS 5.3 (Rocks Cluster), and it woks fine.
No problem with lengthy fsck, as with ext3 (which does not support such
capacities). I did not try yet ext4...
Alain
I have Raid6 Arrays with 30TB. We have tested XFS and its write performance
was really dissapointing. So we looked at Ext4. It is really good for our
workloads, but it lacks the ability to grow over 16TB. So we crated two
partitions on the raid with ext4.
The RAID rebuild time is around 2 days, max 3 if the workload is higher. So I
presume that for 40TB it will be around 4 days.
Marian
For interest how much *memory* would you need in your raid management node
to support "fsck" on a 40TB array. I imagine it would be very high.
Steve
_______________________________________________
CentOS mailing list
CentOS@xxxxxxxxxx
http://lists.centos.org/mailman/listinfo/centos
