On 10/5/2012 12:39 PM, Grant Albitz wrote:
I feel bad asking this question because I generally know what raid type to pick.
I am about to configure 24 256gig ssd drives in a ZFS/Comstar deployment. This
will serve as the datastore for a vmware deployment. Does anyone know what raid
level would be best. I know the workload will determine alot, but obviously
there is varying workload across a vmware environment. Since we are talking
about ssds I dont see a particular reason to not create 1 big zfs pool, with
the exception that I know people generally try to keep the drive count from
getting out of control. Raid 10 seems like a waste of space with little benefit
in performance in this case. i am leaning towards raid z2 but wanted to get
everyones input.
The datastore will host a fileserver, and exchange server for about 50 users.
The environment is all 10g and they have solid states in all desktops so
essentially that is the reason for such a large SSD deployment for a small # of
users.
There seems to be varying opinions, especially when you factor in trying to
keep writes low for ssds.
a 24-drive raidz2 is a really bad idea. you will get one drive IOPs.
you said raid10 is a waste? depends on your workload. keep in mind for
read-heavy random IOPs, raid10 is extremely good. If you insist on some
raidz* flavor, I would do something like 3 8-drive raidz2 vdevs, so you
get 3 vdevs random IOPs...
_______________________________________________
OpenIndiana-discuss mailing list
OpenIndiana-discuss@openindiana.org
http://openindiana.org/mailman/listinfo/openindiana-discuss
