[GE users] h_vmem and mmap

murple andreas.kuntzagk at mdc-berlin.de
Fri May 21 16:00:03 BST 2010


Hi,

I just made h_vmem consumable to manage memory usage.
Now one user askes how that's going to work out with his huge jobs using 
mmap calls.

He runs many different jobs in parallel (on one node) which access the 
same big file (20G) with mmap calls.
So the used/needed virtual memory for EACH job would look like 20G 
meaning he can not run as many jobs in parallel as possible if the 
"real" memory used would be taken into account.

So am I right so far?
Is there any workaround?
(Btw this is still 6.2)

regards, Andreas

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