Hello,
I was wondering if someone could point me to any information describing
how the l2arc works?
I attached an SSD as a cache device to the root pool of a 2009.11
system. Although the cache has started filling up (zpool iostat -v) it
just seems that when I do a reboot, I hear quite a bit of disk activity.
I was hoping, in the best case, that most of the disk access that was
needed to boot would have been served though the SSD.
Does the cache fill only on writes? And what is the cache replacement
policy if/when the cache becomes full?
I did notice some information regarding how limiting the speed at which
the l2arc populates, and I think bug 6748030 discusses a "turbo warmup".
Thanks for any information.
--joe
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