[OmniOS-discuss] Status of TRIM support?

[Dan Swartzendruber]

(merging comments to Saso and Jim)

I don't think I mentioned my environment - if not, my apologies.  This is
a SOHO/Lab setup, so things like zeusram are non-starters.  The basic
network infrastructure is gigabit, so iSCSI ZIL would suck badly, I
suspect.  As far as over-provisioning the 840PRO, I have it sliced for
16GB.  Once it's been running for awhile, I will re-run the disk
benchmark.  I understand the 840PRO doesn't have a supercap - this was
basically just a performance analysis to see how it stacks up compared to
sync=disabled and on-pool ZIL.  If I go this route, I will need to look
for a decent/affordable unit with supercap.  One other test I can try is
with a 15K 76GB SAS 2.5-inch drive I salvaged from a dead server.  It
should have about 1/2 the latency of a 7200rpm sata drive, and if so would
get me up to about 40MB/sec, which is still not good, but better than
on-pool ZIL.  I'll find out later.  I have googled a fair amount and there
seems to be 'work in progress' for TRIM support for ZoL and illumos, but
no real indication I could find as to when either might support it.