Harper, Rob (STFC,RAL,PPD) wrote:
> Hi all,
>
> We have an issue where Torque is using up a lot of ports (as expected)
> to talk to the MOMs, but these are all in the range <1024. The upshot
> of this is that at times, other services (we're specifically noticing
> this with NFS) are unable to get hold of a port themselves, and hilarity
> ensues.
>
> Googling has yielded limited results, but it does seem that, by default,
> PBS uses privileged ports so that the MOMs know that requests are coming
> from a root account, using this as a form of sanity/security check.
> Seeing as we could have up to ~1500 job slots available, I imagine we're
> going to see issues of this type from time to time.
>
> Has anyone out there seen this, and possibly even dealt with it? I'd
> like to clear the batch system away from that port range, but haven't
> yet been able to work out how to approach this. Any thoughts?
>
> Cheers,
> Rob
>
>
We've seen the same at Durham.
We've mitigated slightly by extending the range of ports that NFS uses,
by setting sunrpc.min_resvport to 300 (from 600) in sysctl.conf
This doesn't fix it, just gives NFS a better chance of getting a port.
--
David Ambrose-Griffith - [log in to unmask]
Assistant Systems Programmer,
IPPP, Department of Physics, Durham University,
Science Laboratories, South Road, Durham, DH1 3LE
Direct Dial: +44 (0)191 3343704
Office: +44 (0)191 334 3811
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