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

Gus Correa gus at ldeo.columbia.edu
Wed May 13 08:30:30 MDT 2009


Hi Chi, list

Thank you!
Great information!

Yes, I read that thread while it was going on,
but I was just too lazy to search for it on the Torque list archives.

Thank you also for the information relating PBS_NET_MAX_CONNECTIONS=1024
to the maximum number of sockets, select(), etc.
I guessed there was some system related limit there, but didn't know 
which/where to find it.

In any case, according to answers on that thread, one can have more than
1024 pbs_moms running.
However, it is unclear to me how this will
work with the 1024 limit on open sockets/connections.

What happens if more than 1024 pbs_moms try to connect to the pbs_server?
Do some of them wait on a queue, or are they simply dropped,
and keep trying until the server has available connections?

Thank you,
Gus Correa
---------------------------------------------------------------------
Gustavo Correa
Lamont-Doherty Earth Observatory - Columbia University
Palisades, NY, 10964-8000 - USA
---------------------------------------------------------------------

Chi Chan wrote:
> I was having the same question, and the discussion can be found in
> this discussion thread:
> 
> http://www.clusterresources.com/pipermail/torqueusers/2009-April/008978.html
> 
> Also, Linux's implementation of select() has a limit of 1024 sockets,
> so I think that's why the Torque code has PBS_NET_MAX_CONNECTIONS
> defined to 1024. If a larger number of simultaneous connections is
> needed, you will need to change the definition in Torque and also the
> system header file. (Another batch system changed the FD_SETSIZE
> definition to 8K, see:
> http://gridengine.sunsource.net/issues/show_bug.cgi?id=1502 ).
> 
> --Chi
> 
> 
> On Mon, May 11, 2009 at 2:48 AM, Rajiv Rajaian <rajiv.care at gmail.com> wrote:
>> Hi
>> Im using torque-2.0.0p8.
>> What is the maximum no of the compute nodes that can be configured with
>> torque..
>> Is there any configuration to limit the no of compute nodes that can be
>> configured..
>>
>> Thanks in Advance
>> Rajiv
>> Project associate,
>> CARE,
>> Anna university
>>
>> _______________________________________________
>> torqueusers mailing list
>> torqueusers at supercluster.org
>> http://www.supercluster.org/mailman/listinfo/torqueusers
>>
>>
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