[Unbound-users] libunbound parallelism
rmf at fleischman.net
Wed Nov 3 19:55:31 UTC 2010
Question regarding parallelism in libunbound:
Using "async" requests, multiple threads can request async resolutions
It appears these threads do a "tube_write()" to a SINGLE background
thread insides libunbound.a
This is concerning! What if 10 threads are all asking for something
that is in the cache?
How can a user of libunbound get more parallelism during resolution?
If the non-async methods are used, the requesting threads block,
reverting to thread-per-request parallelism! That can be even worse.
You'd have to have a thread-per-outstanding request. Even more
The "unbound" server doesn't seem to have this problem. (num-threads
parameter is ignored by libunbound.a users).
All libunbound tips appreciated!!
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