[Gluster-devel] One client can effectively hang entire gluster array

[Raghavendra G]

Hi Patrick,

Is it possible to test out whether the patch fixes your issue? There is
nothing like validation from user experiencing the problem first hand.

regards,
Raghavendra

On Tue, Jul 12, 2016 at 10:40 PM, Jeff Darcy <jdarcy at redhat.com> wrote:

> > Thanks for responding so quickly. I'm not familiar with the codebase, so
> if
> > you don't mind me asking, how much would that list reordering slow things
> > down for, say, a queue of 1500 client machines? i.e. round-about how
> long of
> > a client list would significantly affect latency?
> >
> > I only ask because we have quite a few clients and you explicitly call
> out
> > that the queue reordering method used may have problems for lots of
> clients.
>
> It's actually less about the number of clients than about the I/O queue
> depth.  That's typically a pretty small number, generally proportional to
> the number of storage devices and inversely proportional to their speed.
> So for very large numbers of very slow devices there *might* be a problem
> with the list traversals being slow, but otherwise probably not.
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-- 
Raghavendra G
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