Depends. a) Pool design 5 x SSD as raidZ = 4 SSD space - read I/O performance of one drive Adding 5 cheap 40 GB L2ARC device (which are pooled) increases the read performance for your working window of 200 GB.
If you have a pool of mirrors - adding L2ARC does not make sence. b) SSD type Is your devices are MLC adding a ZIL makes sence. Watch out for drive qualification ! (honor the cache flush command). Robert -- This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
