Peformance data collection from SUN ZFS storage

Hi,
We will be doing a performance load tests on couple of ZFS 7420 soon. what all the performance data needs collected and how?
I am pretty new with this(SUN) line of products and tools. what will you do in those scenario as performance experts?

1) It would certainly be faster as it does not have large ethernet/tcpip overheads.
2) LUNs can be created on the same pool as your existing NAS shares.
3) You can test out with iSCSI, but performance wise it would be very close to your existing NAS. You might want to try to LACP a couple of network ports dedicated to iSCSI.

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