1. CC IN2P3 - T1 for CMS: CSA07: production and transfer
Nelli PUKHAEVA
30 November 2007

2. CCIN2P3 on CMS computing model
The CCIN2P3 is one of the CMS T1 target is to be around 10 % of the overall T1 resources.
Several national and foreign T2 are attached to the CC T1:
CC-IN2P3 T2
GRIF federated T2
Belgium_IIHE, UCL T2
Beijing T2
Nelli Pukhaeva / CMS at CC

3. CC in CMS computing model
At CCIN2P3 we are sharing T1-T2-T3 functionality
~230TB fully deployed and available
Current spliting is:
T TB
T TB
T TB
The splitting between T1 and T2 is done through dedicated CEs.
Separate CEs: T1 - cclcgceli01(SL4),
T2 - cclcgceli02(SL4), cclcgceli05(SL3)
The splitting in term of resources is done by priority for jobs according to CEs and job user (prod vs else).
Nelli Pukhaeva / CMS at CC

4. CSA07 general objective for T1 site CSA07 -- 1 Oct. -- 10 Nov.
This was important event to access
CC-IN2P3 capabilities for transfer,
CMS job production etc…
Tasks to be completed for physics:
alacreco, background data sets, ‘enhanced lepton’ reco
Nelli Pukhaeva / CMS at CC

5. Daily CMS work operation at CC
Number of issues with storage and transfers: HPSS, dCache, srm, afs…
merging jobs problem - solved
Cleaning unmerged files
What we can do for the 2GB job problem?
FTS parameter tuning for matrix transfer
Can we avoid accessing HF libraries on /afs and just copy them on WN?
Nelli Pukhaeva / CMS at CC

6. CMS jobs monitoring
One good day for us
Nelli Pukhaeva / CMS at CC

7. Monitoring jobs at CC: CMS jobs at CC IN2P3 Nelli Pukhaeva / CMS at CC
Max all cmsf running jobs: Average all cmsf running jobs: Current all cmsf running jobs: 538
Max all running jobs: Average all running jobs: Current all running jobs:
Max Percentage % Average Percentage % Current Percentage %
Nelli Pukhaeva / CMS at CC

8. CMS jobs monitoring at CC
T1 jobs
T2 jobs
Nelli Pukhaeva / CMS at CC

9. Monitoring of jobs at CC: Grid CMS jobs at CC IN2P3 Analysis
Nelli Pukhaeva / CMS at CC

10. T1-T1 Transfer
Nelli Pukhaeva / CMS at CC

11. CMS data transfer by PhEDEx
Nelli Pukhaeva / CMS at CC

12. It should started from good link to all T1s
DDT
It should started from good link to all T1s
Things have improved BUT after 1 month of hard effort.
Reasonable strategy - to get in priority T1-T1 links and then T1-associated T2 links, then enabling any T1-T2 connection through other T1s.
We don’t see a need for continuous commissioning rather recommission after upgrades or several shutdown periods
Nelli Pukhaeva / CMS at CC

13. Data transfer at CC FTS Dedicated channels for each T1
Dedicated channels for each corresponding T2 –GRIF, Belgium, Beijing
STAR channel with 10 strims
During of CSA07 we have tune the FTS parameters for each channel
Nelli Pukhaeva / CMS at CC

14. transfer and production Next step - get more
CSA07 at CCIN2P3
CCIN2P3 have done
GOOD
There is room for
improvement for
transfer and production
Next step - get more
efficient use of these ressources
Nelli Pukhaeva / CMS at CC

15. support
Ready for NY ?
Number of jobs: Today - 900, 250 production jobs
Transfer: Why we cant to keep transfer stable?
We believe a LOT can be done improving CMS
application and tools - examples of job merging
with connection pb, reading data file on /afs to be
avoided, manual cleaning of files to be avoided,
CMSSW 64 bit build…
Nelli Pukhaeva / CMS at CC