11 декабря 2015 г. 20:45:34 CET, Reginald Beardsley via openindiana-discuss <openindiana-discuss@openindiana.org> пишет: >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 > >_______________________________________________ >openindiana-discuss mailing list >openindiana-discuss@openindiana.org >http://openindiana.org/mailman/listinfo/openindiana-discuss
I am hot sure I see a problem here. You can still make a raw partition and swap there, or a separate pool on the ssd and a zvol and swap there (there are some special options to optimize for the swap/dump zvols, see e.g. my OI/illumos wiki pages on "advanced" installs). The swap area does not have to be part of rpool, and you can have more than one, and you can enable/disable them on the fly (free VirtMem space permitting). The only downside is that unlike linux you can't prioritize among your different active swap areas. Jim -- Typos courtesy of K-9 Mail on my Samsung Android _______________________________________________ openindiana-discuss mailing list openindiana-discuss@openindiana.org http://openindiana.org/mailman/listinfo/openindiana-discuss
