Hello,
For sometime now we've used a backend (non-internet accessible) server
to generate static content that is shared via NFS to a front-end server
for internet access. Both machines use ZFS exclusively.
The webserver is nginx and we had AIO set to on, with the AIO module
built into the kernel.In 10.x it "just worked".
About two weeks ago I upgraded that backend machine to 11-STABLE in
order to start building packages for 11. I've just updated it again to
r305417. I don't recall it not working as expected.
More recently I upgraded the front-end machine to 11-STABLE @r305311.
Since then, AIO is not working and I get a critical error in the nginx
logs like this:
2016/09/05 15:58:02 [crit] 21145#0: *649 aio_read("/path/to/file")
failed (45: Operation not supported) while sending response to client ...
In 11 AIO is built into the kernel by default, and I have confirmed that
it works as expected in files from a local file system. Since the
webserver isn't aware that the file system in question is shared via
NFS, it seems this is an operating system issue.
--
Jim Ohlstein
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