I have only occasional need to run problems larger than main memory (16 GB at 
present), so  I can't justify replacing all the DRAM for an infrequent need.  
The drop in SSD prices has me contemplating adding a 128 GB SSD as a swap 
device.  The SSD latency and IOPS specs look as if they might be a useful 
compromise.

Does anyone have any experience with this?  The sort of jobs I'm interested in 
are batch processes that take several hours, not interactive tasks.  

At present rpool is a ZFS 3 way mirror.  It's become a bit unclear to me if it 
is still possible to control the swap device independently of other parts of 
the system contained in rpool.  Back in SunOS 4.x days I ran with a pair of 
swap partitions spread across two disks which got me twice the performance on 
large array operations.

Reg

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