Hello,

I'm using a Sun Fire X4500 "Thumper" and trying to get some sense of the best 
performance I can get from it with zfs.

I'm running without mirroring or raid, and have checksumming turned off.  I 
built the zfs with these commands:

# zpool create mypool disk0 disk1 ... diskN
# zfs set checksum=off mypool
# zfs create mypool/testing

When I run an application with 8 threads performing writes, I see this 
performance:

   1 disk  --  42 MB/s
   2 disks --  81 MB/s
   4 disks -- 147 MB/s
   8 disks -- 261 MB/s
  12 disks -- 347 MB/s
  16 disks -- 433 MB/s
  32 disks -- 687 MB/s
  45 disks -- 621 MB/s

I'm surprised it doesn't scale better than this, and I'm curious to know what 
the best configuration is for getting the maximum write performance from the 
Thumper.

Thanks,

  --  Bill.
 
 
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