Last modified 6 weeks ago Last modified on 06/13/17 15:12:30

dCache Tier I meeting June 13, 2017

[part of a series of meetings]

Present, Paul), IN2P3(), Sara(), Triumf(), BNL(), NDGF(), PIC(Marc), KIT(Samuel), Fermi(), CERN()


(see box on the other side)

Site reports


Everything running smoothly at PIC.

Next week upgrade dCache to the latest 2.16-release. Currently PIC is running 2.16.29.

NFS problems

Massive jobs with lots of IO

IOError messages

1,000 movers. Open a lot of files, but it seems to take some time before the movers are stopped.

Marc tried to reproduce the problem.

Maybe to do with queue limits on the pool. If PIC has a dedicated the NFS queue then the limit can be increased to something quite large (10,000,000).


Two pools have restart

manual restart

direct buffer error

opened support ticket

RT 9205 will be updated with fio script to test how GPFS performs with different block sizes.

Support tickets for discussion

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Same time, next week.