LINUX PC CLUSTER AND SEISMIC MIGRATION

[Eugene Leitl]

Sorry for forwarding this late, I'm processing a large backlog.

---------- Forwarded message ----------
Date: Sun, 11 Nov 2001 18:21:41 -0600
From: Roberto Cervantes Muller <robertoc at tesenergy.net>
To: linuxbios at lanl.gov
Subject: info

Dear Sir:

LINUX PC CLUSTER AND SEISMIC MIGRATION

If we run migration software package in a PC Cluster
environment, we distribute all task among the
clusters and also the hard space available on each
cluster. What would happened if one of the clusters
go down while performing a pre stack depth migration?
that might takes months, do we have to re-start
the process , else what would happened with that data?


PROBABLY WILL DEPEND ON COMMUNICATION SOFTWARE:

It depends on the software. The package I am most familiar with, MPICH,
cannot recover from a failed node and the entire parallel process must be
restarted. I don't know if there are any generic software systems that
can handle dynamic changes to the cluster.
Otherwise, it may be possible to adjust your application so it will
checkpoint itself at stages of the computation so it can be
completely restarted at a checkpoint after a node fails.


thanks and regards,






________________________________________
Roberto  Cervantes  Muller
Technical Manager
Tesenergy Services
E-mail: robertoc at tesenergy.net
E-fax: 1 509 696 8501
URL=http://www.tesenergy.net
________________________________________

**********************************************************************
This email and any files transmitted with it are confidential and
intended solely for the use of the individual or entity to whom they
are addressed. If you have received this email in error please notify
me.

This footnote also confirms that this email message has been swept by
for the presence of computer viruses.
**********************************************************************