[OpenIndiana-discuss] SSD as a dedicated swap device

[Jacob Ritorto]

I've used swap plain partitions on zfs-rooted machines as well as
multi-disk zfs swap, both to good effect.

Even if secondary storage (SSD) can never be as fast as primary (RAM),
it'll should allow the job to proceed when the batch process peaks its
memory utilisation.  Since it's batch processing, the swap delay accrued
might not even matter that much.

I think the OP's plan is a sensible design compromise and see no problems
with giving it a shot.

If the swap partition ends up being on ZFS, it'll garner the additional
benefit of being able to be periodically scrubbed to check for degradation
of the SSD (these only accommodate a finite number of write cycles, but
most modern ones have write leveling to distribute the exercise across the
whole device).


--jake