ZFS - moving from a zraid1 to zraid2 pool with 1.5tb disks

Matthew D. Fuller fullermd at over-yonder.net
Fri Jan 7 11:16:38 UTC 2011

On Thu, Jan 06, 2011 at 03:45:04PM +0200 I heard the voice of
Daniel Kalchev, and lo! it spake thus:
> You should also know that having large L2ARC requires that you also
> have larger ARC, because there are data pointers in the ARC that
> point to the L2ARC data. Someone will do good to the community to
> publish some reasonable estimates of the memory needs, so that
> people do not end up with large but unusable L2ARC setups.

Estimates I've read in the past are that L2ARC consumes ARC space at
around 1-2%.

Matthew Fuller     (MF4839)   |  fullermd at over-yonder.net
Systems/Network Administrator |  http://www.over-yonder.net/~fullermd/
           On the Internet, nobody can hear you scream.

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