[Bugs] [Bug 1358606] limited throughput with disperse volume over small number of bricks

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1358606

Raghavendra G <rgowdapp at redhat.com> changed:

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--- Comment #30 from Raghavendra G <rgowdapp at redhat.com> ---
(In reply to Manoj Pillai from comment #26)
> We hit this bug in an "EC over RAID-6 bricks" configuration. But I expect
> that it will hurt us badly in an EC+JBOD+brick-multiplexing config as well.
> 
> Do you folks agree?

Manoj,

Based on our discussions, you were concerned about connections being shared by
multiple bricks. But, each brick gets an exclusive socket (not shared by any
other brick) for each client connected to it (this is true without brick-mux
and brick-mux doesn't change it). This socket is used for data (I/O) traffic.
If we consider just that parameter Brick-multiplexing should've no effect
(neither positive/nor negative). However, other resources like threads in
server process, server process memory, OS, physical network, disks etc are
still shared by bricks. Not sure whether that will have any effects on
performance.

regards,
Raghavendra

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