On Mar 28, 2010, at 6:57 AM, Edward Ned Harvey wrote: >>>> You can't share a device (either as ZIL or L2ARC) between multiple >> pools. >>> >>> Discussion here some weeks ago reached suggested that an L2ARC device >>> was used for all ARC evictions, regardless of the pool. >>> >>> I'd very much like an authoritative statement (and corresponding >>> documentation updates) if this was correct. >> >> I'm responsible for propagating this false rumor. It is the result of >> some >> testing in which my analysis was flawed. The authoritative response >> is, >> as usual, in the source. > > Can't you slice the SSD in two, and then give each slice to the two zpools?
This is exactly what I do :-) For more background, low-cost SSDs intended for the boot market are perfect candidates. Take a X-25V @ 40GB and use 15-20 GB for root and the rest for an L2ARC. For small form factor machines or machines with max capacity of 8GB of RAM (a typical home system) this can make a pleasant improvement over a HDD-only implementation. This morning Amazon says the X-25V is only $125 -- almost pocket change. -- richard ZFS storage and performance consulting at http://www.RichardElling.com ZFS training on deduplication, NexentaStor, and NAS performance Las Vegas, April 29-30, 2010 http://nexenta-vegas.eventbrite.com _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
