Difference: GridMapDir (2 vs. 3)

Revision 32011-06-22 - AndresAeschlimann

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Grid Map dir mechanism

This page is supposed to give a quick insight into the grid map dir mechanism currently used in the gLite middleware by all EGEE adhering sites.

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  The reader might argue: what if all pool accounts are taken? There is a cronjob on the CE that systematically goes through this directory for all groups of pool accounts defined and checks whether at least the 20% of them is free. In case (and this happens so often for default pool accounts) they run out of this threshold the cronjob selects the pool account to release by taking into account the date of the last activity/assignation.
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In any case it does not remove accounts newer than 10 days. It might even be that also with 200 pool accounts available a VO (ATLAS or CMS most likely) can run out of available mapping possibilities but this is far to be probable for LHCb where we do not even have 200 different users. YAIM at the moment comes with default very confrotable in temrs of main pool accounts. Of course this becomes impossible for LHCb in case of pool accounts for sgm users. In VOMS we have at most 10 users elilgible to be mapped to local sofwtare managers. In case no pool accounts can be released the job submission fail with some globus error (like the globus error 3)
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In any case it does not remove accounts newer than 10 days. It might even be that also with 200 pool accounts available a VO (ATLAS or CMS most likely) can run out of available mapping possibilities but this is far to be probable for LHCb where we do not even have 200 different users. YAIM at the moment comes with default very confrotable in temrs of main pool accounts. Of course this becomes impossible for LHCb in case of pool accounts for sgm users. In VOMS we have at most 10 users elilgible to be mapped to local sofwtare managers. In case no pool accounts can be released the job submission fail with some globus error (like the globus error 3)
  Further reading (about YAIM and SGM/PRD pool accounts might be found at here
 
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