Grid Technology

CERN IT Department

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Update on ACE

Wojciech Lapka

LCG MB, 7th June 2011

Grid Technology May availability reports

• ACE (“official” only for OPS):– ORing of CE flavours + LHC experiments:

• http://gridview015.cern.ch/GRIDVIEW/downloads/Reports/201105-ace/

• GridView (official for LHC experiments):– http://gridview015.cern.ch

/GRIDVIEW/downloads/Reports/201105/wlcg/

Update on ACE - 2

Grid Technology ACE/GridView comparison

• ACE numbers correct since 1st of May– Minor differences

• Services not declared in GOCDB• Automatic status re-computations when data received with a

delay• Downtime declared for several sites• Few sites with availabilities higher in ACE for standard algorithm

(to be checked)

• WLCG and EGI reports fixed– Tier-2 reports (country name & description missing)

Update on ACE - 3

Grid Technology ORing of CEs & standard GV algorithm

• T1 sites– Average (the same as with the old algorithm)

• Availability & Reliability: 92%– FZK-LCG2: 3% higher in ACE

• CE was failing while CREAM was OK– TW-LCG: 5% lower in ACE

• Different SRMv2 services

• General for T1s & T2s:– Lower availability for 59 sites– Higher availability for 16 sites

Update on ACE - 4

Grid Technology GridView portal based on ACE

• https://gvdev.cern.ch/ACEVAL/ace_index.php– Till the time this functionality integrated in MyWLCG– Data transfers, FTS and old GridView availabilities: http

://gridview.cern.ch/GRIDVIEW/

• Excel Report Generation Form– http://gvdev.cern.ch/GVPC/Excel/ACE/

Update on ACE - 5

Grid Technology ACE - next steps

• ACE still using Integration Database– Migration to Production Database

• Availabilities for LHC experiments– VO feeds need improvement in ATP– Validation by the experiments

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Grid Technology Conclusion

ACE ready for OPS based on any CE flavour

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Grid Technology Miscellaneous

• Delayed metric results– We would like to set ‘max delay’. – If yes, how many days?

• Replacement of CA probe– 'org.sam.WN-CAver' by new probe 'hr.srce.CADist-Check’– Tentative date: 01st August

Update on ACE - 8

Grid Technology

Questions?

Update on ACE - 9

Grid Technology Acknowledgments

• GridView Team from BARC:– Rajesh Kalmady– Phool Chand– Vaibhav Kumar– Digamber Sonvane– Pradyumna Joshi– Vibhuti Duggal– Kislay Bhatt

Update on ACE - 10