How to request the number of nodes (not procs), while job submission in SGE?
for e.g. In TORQUE, we can specify qsub -l nodes=3
How to request the nodes by their names in SGE?
for e.g. In TORQUE, we can do this by qsub -l nodes=abc+xyz+pqr, where abc, xyz and pqr are hostnames
For single hostname, qsub -l hostname=abc it works. But how do I delimit multiple hostnames in SGE?
Requesting the number of nodes with Grid Engine is done indirectly.
When you want to submit a parallel job then you have to request
a parallel environment (man sge_pe) together with the amount
of slots (processors etc) like qsub -pe mytestpe 12...
Depending on the allocation_rule defined in the parallel environment
(qconf -sp mytestpe) the slots are distributed over one or more
nodes. If you have a so called fixed allocation rule where you
just add a certain number as allocation rule like 4 (4 slots per
host) it is easy. If you like one host just submit with -pe mytestpe 4
if you want 10 nodes just submit with -pe mytestpe 40.
Node name can be requested by the -l h=abc. Since node names are
RESTRINGS (regular expression strings) in Grid Engine you can create
a regular expression for host filtering: qsub -l h="abc|xyz".
You can also create host groups (qconf -ahgrp) and request
so called queue domains (qsub -q all.q@@mygroup).
Daniel