Solaris uses Pooled I/O across all devices in the pool. Now that you add
a second device you doble the performance for all newly written data.
Because ZFS it is a copy on write filesystem, every new write is
"restriped" and thus you double the performance of the array for every
new or rewritten data.
Existing data that has not changed is not restriped.
Robert
The Big T schrieb:
I am hoping that someone can clairify a couple questions that I have about
Storage pools under Solaris. I am pretty sure I have the idea right, just want
to make sure to prevent building myself into the corner.
If i had a Raidz2 array of say 4 drives, with say 50% of its capacity used, and
yeilds me say 70MB/s read/write.
Now i want to add another Raidz2 array of 4 equal sized drives.
Now here lays my question; If i add the new raidz2 vdev to the already created
zpool would it stripe the two raidz2 arrays? or would it just tack on another
2 drives worth of storage onto the end of the current zpool?
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