[Lustre-discuss] Network raid6?

Andreas Dilger adilger at sun.com
Thu Apr 9 02:44:41 PDT 2009


On Apr 09, 2009  03:48 -0400, Christopher Deneen wrote:
> For redundancy why not a raid like parity as it stripes across the
> ost's. For example 100 oss's with directly attached raid6 arrays. then
> have 2 parity stripe blocks over the 100 allowing for 2 failures of
> oss's or the directly attached ost's. This seems more cost effective
> than mirroring using drdb or heartbeat. In fact it eliminates the need
> for either.

Sure we've thought of this, but implementation is MUCH more difficult
than describing it, believe us.

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




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