[Lustre-discuss] HLRN lustre breakdown

[Andreas Dilger]

On Aug 21, 2008  15:59 -0400, Brock Palen wrote:
> Really ?  You sure?  I just set up a new 1.6.5.1 filesystem this week:
>
> [root at nyx003 ~]# cat /proc/fs/lustre/llite/nobackup-0000010037e27c00/ 
> checksum_pages
>  0

This is for keeping checksums of the pages in the client memory.  This
is off by default, but we've used it in the past when trying to diagnose
memory corruption on the clients.

What you want to check is /proc/fs/lustre/osc/*/checksums. 
.../checksum_type allows changing the checksum type, either CRC32 (the
only option for OSTs < 1.6.5) or Adler32 (default if OST supports it).

Cheers, Andreas
--
Andreas Dilger
Sr. Staff Engineer, Lustre Group
Sun Microsystems of Canada, Inc.