> If they cannot be optimized you can get about a 12% performance bump
> using UFS + directio
>
> http://blogs.sun.com/realneel/
Go re-read that blog entry:
If you do not penalize ZFS with double checksums, you can note
that we are within 6% of our best UFS number. So 6% gives you
provable data integrity, unlimited snapshots, no fsck, and all
the other good features. Quite good in my book :-) Of course,
this number is only going to get better as more performances
enhancements make it into the ZFS code.
(http://blogs.sun.com/realneel/entry/zfs_and_databases_time_for)
...and those numbers were from last year (2007) on a synthetic OLTP
workload.
I would suggest that Pao follow Neel's reccomendations about tuning your
database, and also look at his I/O configuration.
-j
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