what is diff between configuration file and node

seshikumar · Post by **seshikumar** » Sun Jan 27, 2008 11:22 am

please let me know the diff between Configuration file and Node

Node is nothing but cpu?what is cpu?

ray.wurlod · Post by **ray.wurlod** » Sun Jan 27, 2008 1:21 pm

A configuration file contains definitions of processing nodes.

Your statement "Node is nothing but cpu" is totally incorrect. A processing node is a logical construct, totally unrelated to CPU (central processing unit). A node is a set of resources that is available for processing data, including a machine location, disk space for storing data, disk space for scratch space, and so on.

I believe you are confusing the statement "the number of nodes is unrelated to the number of CPUs". You can have more nodes than CPUs, you can have fewer nodes than CPUs, you can have the same number of nodes as CPUs. And the number of nodes used by a particular run of a job is controlled by which configuration file is selected (through the APT_CONFIG_FILE environment variable) when that job run is requested.

chulett · Post by **chulett** » Sun Jan 27, 2008 3:06 pm

On the off chance that the "what is cpu?" question is for real, find an in-depth answer here.

ray.wurlod · Post by **ray.wurlod** » Sun Jan 27, 2008 3:54 pm

What is CPU? It's a TLA!

Apologies to anyone whose first language is not English. My joke works well in English once it is understood that TLA is an acronym for "three letter acronym".

chulett · Post by **chulett** » Sun Jan 27, 2008 4:01 pm

Um, yah... 'works well'...