[GE users] Given 2 types of hosts fast/slow, how do I have sge use the slow machines first and the fast machines only if specifically requested first

craffi dag at sonsorol.org
Wed Apr 14 18:40:16 BST 2010

Hi Bill,

Search the docs in wikis.sun.com -- the keyword you want is "seqno" or 
"seqno sorting.

Basically when the SGE scheduler is considering a lists of hosts that 
are capable of satisfying all of the job resource requests there is a 
default subsort by load so that the "least busy, most suitable machine" 
gets your job first. You can override this behavior by assigning each 
server host an integer value and then changing queue_sort to "seqno"

For your system you'd do something simple like give all of your old 
systems a value of 10 and all of the new systems a seqno of 100 (I might 
have the values reversed, can't remember who wins the sort - high or low 
number ...)


bdbaddog wrote:
> Greetings,
> So we have a pile of new Xeon 5500 systems, and we have some older
> opteron based systems, we'd like all users jobs to first fill up the
> opteron systems and then fill up the Xeon systems.
> Unless they specifically request via a resource request (we have
> "node_type" for that purpose)..
> What's the best way to configure this in SGE ?
> Thanks,
> Bill
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