Interesting! Thanks so much for the note. I inherited the OpenSolaris
infrastructure (the guy who was working on it is leaving), and he's got
the X25-E's as ZIL's in many of our OpenSolaris systems that are already
running. Is there a better choice that doesn't cost $6k? :)
I'd expect the data loss to at least be better than enabling the RAM-level
write cache.. is there a test available for this specific case, to try
different configs and see how much data is lost?
On Wed, 24 Feb 2010, Robert Heinzmann (reg) wrote:
watch out for proper ZIL devices. X25-E is not a good choice.
see
http://www.mysqlperformanceblog.com/2009/03/02/ssd-xfs-lvm-fsync-write-cache-barrier-and-lost-transactions/
Choosing the right ZIL devices is essential for data integrity. Same goes for
data disks (cache flush).
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