Just following up since this thread went silent after a few comments
showing similar concerns, but no explanation of the behavior. Can anyone
point to some code or documentation which explains how to estimate the
expected number of TCP connections a client would open based on read/write
volume, # of volumes, # of OSDs in the pool, etc?


On Tue, Oct 27, 2015 at 5:05 AM, Dan van der Ster <d...@vanderster.com>
wrote:

> On Mon, Oct 26, 2015 at 10:48 PM, Jan Schermer <j...@schermer.cz> wrote:
> > If we're talking about RBD clients (qemu) then the number also grows with
> > number of volumes attached to the client.
>
> I never thought about that but it might explain a problem we have
> where multiple attached volumes crashes an HV. I had assumed that
> multiple volumes would reuse the same rados client instance, and thus
> reuse the same connections to the OSDs.
>
> -- dan
>



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*Rick Balsano*
Senior Software Engineer
Opower <http://www.opower.com>

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