Could you post a pointer to these patches to the list, I'd Like to look
at them as well.
Evan
________________________________
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Peter J Braam
Sent: Monday, December 11, 2006 8:19 PM
To: Julien Perez
Cc: [email protected]; Andreas Dilger
Subject: Re: [Lustre-discuss] Software RAID support
The versions of the Linux kernel for which there are Lustre
patches do not have stable RAID6. Some of our customers experienced
data corruption in the RAID6 layer.
We have a highly optimized RAID5 layer for use with Lustre
(several times faster than normal RAID5) - with that layer the SUN
thumper boxes can get over 1GB/sec. Alex can point you at the kernel
patches for that, if you'd like to try it.
- Peter -
On Dec 11, 2006, at 9:07 AM, Julien Perez wrote:
Hello Andreas, everyone,
Im planning to use software RAID6 (mdadm) on an OST with
Lustre. Do you think it is safe to do so ? Any advise against it ?
Julien
On 12/6/06, Andreas Dilger <[EMAIL PROTECTED]>
wrote:
On Dec 05, 2006 16:58 -0800, Lin Shen (lshen)
wrote:
> The FAQ says that Lustre supports software
RAID. Is the software RAID
> cluster aware? Can I put two partitions from
two different nodes into
> the same RAID set?
No. The cluster-aware RAID feature (Lustre RAID
= LAID) is only in the
planning stages.
This is only indicating that Lustre can use MD
RAID{0,1,5} devices
for a back-end OST or MDT filesystem. That
said, there was a bug just
found with Lustre OSTs and software RAID 5 (bug
11313) if you are
planning on using software RAID 5 you need a
patch.
Cheers, Andreas
--
Andreas Dilger
Principal Software Engineer
Cluster File Systems, Inc.
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