Date: Mon, 21 Nov 2011 19:11:44 -0500 From: "Lars R. Noldan" <lars@w9zeb.org> To: freebsd-fs@freebsd.org Subject: Re: tune ZFS for fast clone and creation? Message-ID: <4ECAE8C0.7080306@w9zeb.org> In-Reply-To: <20111122000726.GA46653@weta.local> References: <20111122000726.GA46653@weta.local>
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On 11/21/11 07:07 PM, Ian Downes wrote: > Hello, > > I know ZFS is already 'fast' with COW clones etc., but can ZFS be tuned > for faster clone and creation? The fast random access of a SSD helps but > what other options are there? Tuning caches? Different zpool layouts? > ...? > > I haven't been able to find any info so any suggestions would be > welcome! > > some basic experiments: > > zpool with a single 500 GB 7200 rpm consumer HDD > zpool with a single 64 GB consumer SSD > > zfs create: > 250 ms on HDD > 110 ms on SSD > > zfs clone: (about 1 GB of mixed size) > 250 ms on HDD > 85 ms on SSD > > _______________________________________________ > freebsd-fs@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-fs > To unsubscribe, send any mail to "freebsd-fs-unsubscribe@freebsd.org" Hello Ian, Our storage configuration has 7 spindles in a RaidZ2, 2 SSDs as a ZFS mirrored ZIL, and 2 SSDs as a zfs L2ARC cache. Adding a fast ZIL and L2ARC certainly won't hurt your performance. If that L2ARC was something like a Fusion-IO it'd be faster still I imagine. Lars
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