[torqueusers] What is the Maximum no of compute Nodes in torque

Garrick garrick at usc.edu
Wed May 13 08:23:04 MDT 2009


There is no hard limit. It is limited by tuning, network, and CPU.

HPCC/Linux Systems Admin

On May 13, 2009, at 2:08 AM, Bogdan Costescu <Bogdan.Costescu at iwr.uni-heidelberg.de 
 > wrote:

> On Tue, 12 May 2009, Gus Correa wrote:
>
>> The Torque documentation is quite terse about the hard limits.
>
> Indeed, I have looked for these some time ago as well...
>
>> 1) If Torque doesn't allow more than 1024 simultaneous connections to
>> pbs_moms, can one run simultaneous jobs on more than 1024 nodes?
>
> My understanding is that the connections are not persistent, so there
> is no direct link between this number and the number of pbs_moms. This
> only shows how many pbs_moms can talk to the master at one time.
>
>> 2) Or does this require increasing the PBS_NET_MAX_CONNECTIONS value?
>
> Not without switching from select() to poll().
>
>> 3) Would a larger value require also changes in the OS limits,
>> to work properly?
>
> You might need to first set (u)limits, possibly in the init.d start
> script.
>
> -- 
> Bogdan Costescu
>
> IWR, University of Heidelberg, INF 368, D-69120 Heidelberg, Germany
> Phone: +49 6221 54 8240, Fax: +49 6221 54 8850
> E-mail: bogdan.costescu at iwr.uni-heidelberg.de
> _______________________________________________
> torqueusers mailing list
> torqueusers at supercluster.org
> http://www.supercluster.org/mailman/listinfo/torqueusers


More information about the torqueusers mailing list