Large I/O to gfortantmp files
Hi everyone,
We (ATLAS) are seeing very heavy I/O from MG5_aMC processes due to writing 100-300MB to gfortrantmpXYZ files.
On their own this is not too problematic, but when many such processes are arriving at grid sites it's causing ~TBs of read_char and killing the sites.
I spoke briefly with Olivier about this a couple of weeks ago. He suggested that there may be a simple workaround that we can apply to existing gridpacks. Olivier could you elaborate on this?
Here is one of the problematic gridpacks on afs in case it helps:
/afs/cern.
Best,
Josh
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