node operations in qmgr [Was: Re: [torqueusers] 64 bit issues.]

Garrick Staples garrick at usc.edu
Mon Aug 29 13:50:17 MDT 2005


On Mon, Aug 29, 2005 at 09:35:48PM +0200, Roy Dragseth alleged:
> On Friday 26 August 2005 23:44, Garrick Staples wrote:
> > Basicly, adding and removing nodes in qmgr is currently an unsupported
> > operation.
> 
> So maybe the best strategy would be to use qmgr to add/remove nodes and then 
> sync up with a pbs_server restart when done?  Would this ensure that all moms 
> get the correct okclients list?

I really can't say at this time.  I haven't explored those portions of
the code yet.  It might work.  No gaurantees from me.

I'll explore it in p6.

With torque p5 on large clusters, it can take a very long time to
reestablish communication with all of the moms.  This should be much
much faster in p6.

 
> > Changing node attributes in qmgr works fine, though maui won't pick up
> > any removed attributes. ??Maui picks up new attributes fine, but you have
> > to restart it if you remove any attributes.
> 
> Thanks for the info.  I'm the maintainer of the pbs/maui setup for the rocks 
> cluster distribution and I'm trying to figure out a way to make it possible 
> to set node properties for inhomogeneous clusters.

Hetergeneous arches running Linux has long been a pet peeve for me in
Torque.  It has an "arch" node attribute which should be useful for this
purpose, but it is set to the useless value of "linux".

-- 
Garrick Staples, Linux/HPCC Administrator
University of Southern California
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