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LNL CMS M.Biasotto, Bologna, 29 aprile 2002 1 LNL Analysis Farm Massimo Biasotto - LNL.

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Presentation on theme: "LNL CMS M.Biasotto, Bologna, 29 aprile 2002 1 LNL Analysis Farm Massimo Biasotto - LNL."— Presentation transcript:

1 LNL CMS M.Biasotto, Bologna, 29 aprile LNL Analysis Farm Massimo Biasotto - LNL

2 LNL CMS M.Biasotto, Bologna, 29 aprile Hardware available  3 data servers, each with 1.2TB SCSI disk –ready: just to copy DBs as soon as available  Computing nodes for analysis jobs –58 computing nodes available in the farm: use LSF queues to dedicate some of them only for analysis jobs –with LSF, the number of analysis nodes can be easily changed at any time, depending on current needs

3 LNL CMS M.Biasotto, Bologna, 29 aprile User access to Analysis Farm  How to grant user access to the Analysis Farm?  Short term solution: –local accounts on the farm –immediately feasible, provided a not too high number of users (~20?)  Long term solution: –Grid tools –to be implemented at LNL after tests/developments on Padova CMS testbed –june/july 2002?

4 LNL CMS M.Biasotto, Bologna, 29 aprile Layout farm CMS: production + analysis FastEth 32 – GigaEth 1000 BT SWITCH N1 FastEth SWITCH S1 S10 N24 N1 FastEth SWITCH N1 N24 S9 To WAN 34 Mbps 2001 ~ 1Gbps 2002 S11 S12 Production computing nodes Analysis computing nodes Production servers Analysis servers GW G1 G2

5 LNL CMS M.Biasotto, Bologna, 29 aprile Local accounts  User Federation, with all the dataset produced at LNL, is ready and available: cmsfarm012.lnl.infn.it::/data1/MuonUserFed/muon0102/m uon0102.boot  All the data copied on 3 dedicated servers, independent from production servers  2 “gateway” machines for analysis users ready: cmsfarm-agw1.lnl.infn.it cmsfarm-agw2.lnl.infn.it  Analysis Farm web page: http: //cmsfarmgw.lnl.infn.it/analysis_farm/  Still missing: analysis software (ORCA 6.1.0, etc.)

6 LNL CMS M.Biasotto, Bologna, 29 aprile LNL Grid implementation  Grid components like gatekeeper and storage elements should be setup on dedicated machines, indipendent from production farm –at least 1 of the 3 analysis server could be a storage element –other service machines, like the gatekeeper, taken from current pool of computing nodes –if possible, worker nodes should be in common, or easily switchable from production to grid/analysis  In this way the Grid components can be managed with LCFG and tools provided by WP6, without interferences on the production farm

7 LNL CMS M.Biasotto, Bologna, 29 aprile Layout farm CMS: production + analysis + grid FastEth 32 – GigaEth 1000 BT SWITCH N1 FastEth SWITCH S1 S10 N24 N1 FastEth SWITCH N1 N24 S9 To WAN 34 Mbps 2001 ~ 1Gbps 2002 S11 S12 Production computing nodes Analysis computing nodes Production servers Analysis servers GW G1 G2 CE S10 S11 SE N1 N24 N1 N1 UI

8 LNL CMS M.Biasotto, Bologna, 29 aprile CMS Testbed  Setup at LNL of a “CMS dedicated” Grid Testbed (like in Padova) –setup almost completed –it will be used for test/development of CMS Analysis tools  During development it will be completely independent from the farm. In production phase it will be merged with the farm (see previous slide)

9 LNL CMS M.Biasotto, Bologna, 29 aprile Expected outcome  Identify the best strategy for submitting analysis jobs, for example: –1. send a “compilation job” which creates the executable and stores it on a SE –2. send N analysis jobs (to the same CE), which retrieve the executable and run it  Produce guidelines and all necessary documentation needed by users to effectively carry out analysis in a grid environment  Produce a set of tools to automate the process (scripts, JDL templates,...) –These tools could later be integrated in a Web User Interface (like Genius)


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