tune ZFS for fast clone and creation?

[Lars R. Noldan]

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
>
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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