New serial classes available on seaborg

From: Michael Stewart (pmstewart_at_lbl.gov)
Date: 12/11/2003

• Next message: David Skinner: "notice: /scratch at 93%"
• Previous message: Francesca Verdier: "increases in allocations"

Two new LoadLeveler serial classes are available on Seaborg, serial
and xfer.  Jobs run in these classes will be charged only for one
processor's actual wall clock time.  These classes are designed for

   * preprocessing data needed by large parallel runs
   * postprocessing data produced by large parallel runs
   * transferring data between Seaborg, HPSS and NERSC servers (such as
the visualization server)
   * transferring data between the user's home site and NERSC.


====================================================================
serial:

This class is for serial pre-and-post data processing.  The jobs in
this class will share a single 16 GB node.  There is a run limit of
16 jobs that can share the node at the same time.  It will have wall
clock and CPU limits of 12 hours and a memory limit of 1 GigaByte.

You can make use of this class by specifying the following
LoadLeveler keywords:

#@ job_type = serial
#@ class = regular

====================================================================
xfer:

This class is intended specifically for data transfer jobs.  The run
limit for the class will be 8 jobs sharing a node especially configured
for good network access to HPSS.  It will have wall clock and CPU limits
of 4 hours and a memory limit of 1 GigaByte.  (It takes approximately 3
hours for 1 terabyte of data to be transferred to HPSS from Seaborg).

This class is specifically intended only for data transfer and not
for any other type of serial job.  There is a discussion with examples
of using HPSS in a batch job at
http://hpcf.nersc.gov/storage/hpss/usage_batch.php.

You can make use of this class by specifying the following LoadLeveler
keywords:
#@ job_type = serial
#@ class = xfer
====================================================================

These classes are not designed for single node multi-threaded jobs, e.g.
OpenMP.  Jobs of this type should be submitted with these LoadLeveler
keywords:

#@ job_type = parallel
#@ node            = 1

Please contact consult@nersc.gov if you have any questions.

-- 
Michael Stewart
NERSC Consultant
510-486-6648
pmstewart@lbl.gov

• Next message: David Skinner: "notice: /scratch at 93%"
• Previous message: Francesca Verdier: "increases in allocations"

This archive was generated by hypermail 2.1.6 : 08/21/2008 PDT