We are running Solaris 10 11/06 on a Sun V240 with 2 CPUS and 8 GB of memory. 
This V240 is attached to a 3510 FC that has 12 x 300 GB disks. The 3510 is 
configured as HW RAID 5 with 10 disks and 2 spares and it's exported to the 
V240 as a single LUN.

We create iso images of our product in the following way (high-level):

# mkfile 3g /isoimages/myiso
# lofiadm -a /isoimages/myiso
/dev/lofi/1
# newfs /dev/rlofi/1
# mount /dev/lofi/1 /mnt
# cd /mnt; zcat /product/myproduct.tar.Z | tar xf -

and we finally use mkisofs to create the iso image.

UFS performance
----------------------
We created a UFS file system on the above LUN and the above iso creation 
process takes about 5 mins. (I don't have the exact numbers)

ZFS performance
---------------------
When we create a ZFS file system on the above LUN and create the iso it takes 
forever it seems to be hanging in the tar extraction (we killed this after a 
while i.e. > few hours).

My questions are:

* are we doing something wrong
* is this a known issue
* what are the configuration recommendation for a 3510 FC for ZFS

Thanks in advance,
-- prasad
 
 
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