On Wed, Dec 7, 2016 at 10:31 AM, Doug Hughes <[email protected]> wrote: > > On 12/7/2016 8:24 AM, Skylar Thompson wrote: >> >> I think ZFS can do this, although it's been a while since I've looked >> and might just be for caching metadata. Most enterprise filesystems can >> support it as well, though probably aren't an option for Drobo. We have >> that option on our GPFS (er, Spectrum Scale), OneFS, and BlueARC systems. >> > ZFS main-line can't do this yet, but it is capable of using the SSD for ZIL > accceleration, which is a big win for NFS metadata operations. There are > proprietary enhancements to ZFS that have metadata on SSD, but none in the > Illumos tree yet that are production worthy.
I realize that this is getting a bit far off from the original topic, but Isilon's OneFS can put metadata on SSDs, among a bunch of other cool stuff. There were some simulator VMs floating around at one point, but we are squarely into enterprisey-land, and far beyond a home-use Drobo. If you do go the all-SSD route, as several people have suggested, there are some other things you may want to consider doing, if possible with the Drobo. Off the top of my head: * change the IO scheduler to "noop" * disable or reduce readahead * set /sys/block/<device>/queue/rotational to "0" I also strongly suggest that you *not* use RAID5 or RAID6 if you can afford the overhead. RAID10 should give you better latency, faster rebuilds, smaller performance hit under degraded conditions, and less chance of a second failure during rebuild. -- Jesse Becker _______________________________________________ Discuss mailing list [email protected] https://lists.lopsa.org/cgi-bin/mailman/listinfo/discuss This list provided by the League of Professional System Administrators http://lopsa.org/
