Reuti wrote:
Hi,
Am 09.05.2008 um 20:26 schrieb Prentice Bisbal:
At a previous job, I installed SGE for our cluster. At my current job
Torque is the queuing system of choice. I'm very familar with SGE, but
only have a cursory knowledge of Torque (installed it for evaluation,
and that's it). We're about to purchase a new cluster. I'd have to make
a good argument for using SGE over Torque. I was wondering if the
following SGE features exist in Torque:
1. Interactive shells managed by queuing system
2. Counting licenses in use (done using a contributed shell script in
SGE)
3. Separation of roles between submit hosts, execution hosts, and
administration hosts
4. Certificate-based security.
Are there any notable features available in Torque that aren't available
in SGE?
what you can find in Torque but not in SGE: request a mixture of nodes,
i.e. one heavy node with much memory (or big I/O options) and 5 nodes
with less memory or less disk performance for a parallel job.
Not true. Torque syntax is much cleaner for doing this, but you
can do it in SGE. Call the big memory hosts "bigmemN", where N
is an integer from zero to how many ever servers you have.
Create a hostgroup with the compute nodes called "@compx". Subsequently
create at parallel environment and queue that use this host group.
Normal jobs will go into this parallel environment.
Next, create a parallel environment called pebigmem. Then,
for each host, create an individual queue called qbigmemN.q
(replace N with the appropriate integer). For each queue,
specify the host list as:
hostlist bigmemN @compx
When you launch a job, the call to qsub should include:
qsub -pe pebigmem 6 -masterq [EMAIL PROTECTED],[EMAIL PROTECTED],.....
The -masterq line should list every bigmem queue instance.
At our site, we have a qsub wrapper script that when a user asks
for the parallel environment "pebigmem", we add the -masterq line
to hide the details from them.
If I hadn't figured out how to do this 6 years ago, we could
have never migrated from OpenPBS to SGE.
Craig
OTOH, if you have parallel jobs:
http://www.beowulf.org/archive/2007-September/019269.html
What is different between them from the idea: in Torque you submit a job
into a queue, while in SGE you request resources and SGE will select an
appropriate queue for you.
-- Reuti
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--
Craig Tierney ([EMAIL PROTECTED])
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