So, I setup a flash drive for ZIL (zpool add <pool> log <dev>) and
another for L2ARC (zpool add <pool> cache <dev>). I then set the
secondarycache to be used for metadata only. The cache seems to work
fine but log is not used at all ("zpool iostat -v <pool> 2" doesn't
show any IO). So, I have couple of questions:
1. Why is the ZIL not getting used? I see no writes to it. I was
hoping to get my small random writes to go up.
2. Why does the L2ARC get flushed on a restart? So much write for
nothing? It wrote about 8Gigs on that SSD and then a restart later it
shows 0 size in iostat...:-( Why does it treat as RAM when it knows
Are these features not implemented correctly in zfs-fuse or is it
expected behavior for ZFS?
Thanks a bunch!
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