Reginald Beardsley via openindiana-discuss wrote:
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.
Even an SSD will be way slower than RAM..
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.
I don't think you can add the drive as a drive, but you could create a
pool with a single volume on on it and add that volume with "swap -a
/dev/zvol/dsk/<pool>/<volume>.
--
Ian.
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