[GE users] manage NFS resources

bomb20 Harvey.Richardson at zeenty.com
Thu Sep 10 10:54:10 BST 2009

> Another technique you could use a lock file. Quite simply when the first 
> job starts reading in the data it creates a file, an empty file is 
> sufficient, then when it's finished reading the data it deletes the file.
> All jobs can then have a while loop which said while the lock file 
> exists, sleep for (say) 60 seconds, then try again.

I used NFS file coordination for a cluster sanity check tool and had
to have long timeouts to make sure the nodes saw the correct state from
If the workload is a jobmix then maybe you could prestage the data locally
by intercepting qsub.  This is the sort of thing the eXludus software
does (or at least their initial software did this).



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