Nicolas Dorfsman wrote:
The hard part is getting a set of simple
requirements. As you go into
more complex data center environments you get hit
with older Solaris
revs, other OSs, SOX compliance issues, etc. etc.
etc. The world where
most of us seem to be playing with ZFS is on the
lower end of the
complexity scale. Sure, throw your desktop some fast
SATA drives. No
problem. Oh wait, you've got ten Oracle DBs on three
E25Ks that need to
be backed up every other blue moon ...
Another fact is CPU use.
Does anybody really know what will be effects of intensive CPU workload on
ZFS perfs, and effects of ZFS RAID CPU compute on intensive CPU workload ?
I heard a story about a customer complaining about his higend server
performances; when a guy came on site...and discover beautiful SVM RAID-5
volumes, the solution was almost found.
Raid calculations take CPU time but I haven't seen numbers on ZFS usage.
SVM is known for using a fair bit of CPU when performing R5 calculations
and I'm sure other OS have the same issue. EMC used to go around saying
that offloading raid calculations to their storage arrays would increase
application performance because you would free up CPU time to do other
stuff. The "EMC effect" is how they used to market it.
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