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Cluster and Grid information from configuration file?
Posted: Thu Feb 28, 2013 1:22 am
by vamsi.4a6
In a configuration file if the fastname is same for all the nodes then it denotes SMP.Could anybody help how me to find it out the Cluster and Grid configuration form the configuration file?
Posted: Thu Feb 28, 2013 3:48 pm
by ray.wurlod
A cluster will have more than one fastname in the configuration file. None of the fastnames is a variable.
Posted: Thu Feb 28, 2013 5:32 pm
by lstsaur
In a clustered scenario, the APT configuration files for the parallel framework are statically defined and referenced explicitly in the job.
So management of node use can be a significant effort in clustered configurations.
Posted: Fri Mar 01, 2013 1:03 am
by vamsi.4a6
Thanks ray for u input.Cluster is clear now.Is there anyway to identify the Grid based on fastnames or something else from configuration file ?
Posted: Fri Mar 01, 2013 4:16 am
by ray.wurlod
In a grid the configuration file is usually a prototype, with placeholders such as $$Compute (a Compute node) and $$fastname (a node name) whose values are placed by negotiation with grid management software.
Posted: Fri Mar 01, 2013 6:27 pm
by PaulVL
A) Always ask your local admin.
B) MOST grid installs are using the Grid Enablement Toolkit. So variables like APT_GRID_ENABLE and GRIDHOMEDIR (or something like that) would be set.
You can have the Grid Enablement Toolkit and set it up with an SMP mode as well, so the fastname would be hardcoded, but the nodes would not.
A shop can also be grid and brew their own mechanism to select which pre-generated apt file to use based upon Grid Resource Manager feedback. Not likely, but technically possible.