[GE users] Sort by sequence number question

Lönroth Erik erik.lonroth at scania.com
Wed Jul 11 14:40:08 BST 2007


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We use sge 6.0u8

I'll attach some files to this email (don't know if it works) showing the config from qmon.


Is there some way I can "reset" the SGE entire configuration to see if there is something wrong with my setup that produces this?

/Erik




-----Original Message-----
From: Reuti [mailto:reuti at staff.uni-marburg.de]
Sent: Wed 7/11/2007 2:26 PM
To: users at gridengine.sunsource.net
Subject: Re: [GE users] Sort by sequence number question
 
Am 11.07.2007 um 13:42 schrieb Paul MacInnis:

> On Wed, 11 Jul 2007, [iso-8859-1] Lönroth Erik wrote:
>
>> yes, it is set. Still no luck on this.
>>
>> The only way I can force the damn slaves off the MASTER node, is  
>> to remove the requested "PE" explicitly from the nodes. This is  
>> not what I would want, but I just can't make it happen. It simply  
>> ignores my sequence number alltogether. I have recreated all  
>> queues and restarted the qmaster and scheduler, but no luck  
>> whatsoever.
>>
>> Is there something else affecting the effect of "sequence number"  
>> outside of the general queue configuration and the cluster config?
>
> I would like to add our experience to this discussion.
>
> We recently switched from SGE5.3 to 6.1.  We have 1G, 2G and 4G  
> nodes in
> our cluster.  If a job doesn't specify special memory requirements
> we want it scheduled to the smallest memory machine available.
>
> For 4 years with SGE5.3 this worked well.  We assigned sequence number
> 1965 to the 1G nodes, 2965 to the 2G nodes and 4965 to the 4G nodes.
>
> With SGE6.1 we defined our queues with
> seq_no  1965,[@2g.hg=2965],[@4g.hg=4965]
>
> @2g.hg being the 2G host group nodes and @4g.hg being the 4G nodes.
>
> With qconf -msconf we defined:
> queue_sort_method     seqno
>
> qstat -F presents the queues correctly ordered by this seqno.  However
> jobs are being scheduled to 2G and 4G nodes when there are 1G nodes
> available!
>
> This never happened in SGE5.3!
>
> It seems that in 6.1 either
> 1. "queue_sort_method  seqno" isn't working for queue selection or
> 2. there is some other queue selection criteria that overrides
>    "queue_sort_method  seqno"

I don't see this with our setup. Do you have any default requests  
(either in the complex definition (qconf -sc) or the sge_request file)?

-- Reuti

> Any thoughts?
>
> Paul
>
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