journal on an ssd

Andreas Dilger adilger at
Thu Sep 11 21:17:41 UTC 2008

On Sep 11, 2008  23:10 +0200, Tobias Oetiker wrote:
> Today Andreas Dilger wrote:
> > No, because RAID6 is terribly sucky for performance.  If you need this
> > kind of reliability triple-mirrored RAID 1 would be better.  Much less
> > CPU overhead, and no extra IO.
> do you happen to know how zfs handles it when the intent log is on
> an ssd ?

My (limited) understanding is that it will also mirror the intent log.
I'm not really a ZFS guru, and Lustre's use of the DMU doesn't (yet)
include use of the intent log.

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

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