One of the most exciting things that have gone into ZFS in recent
history has been the overhaul of the L2ARC code. We fundamentaly
changed the L2ARC such that it would do the following:
reduce its own memory footprint,
be able to survive reboots,
be managed using a better eviction policy,
be compressed on SSD,
and finally allow feeding at much greater rates then ever
achieved before.
Let's review these elements, one by one.Reduced Footprint
We already saw in this ReARC articl...