The CMS Beijing Site: Status and Application Xiaomei Zhang CMS IHEP Group Meeting   March 14 2008

Outline Introduction to new T3 site The status of T2 site 第1页 Outline Introduction to new T3 site Resource management CMSSW management User Space management The status of T2 site Data Management Job Management CMS IHEP Twiki and indico CMS IHEP grid operation

CMS IHEP Grid Env 第2页 T3 PBS 1Gb/s T2 PhEDEx VOBox PBS BDII CMS User serve only for local CMS group CMS UI can do both grid and Local Farm submission NFS Storage system T2: shared in grid, a complete grid System needed Support official MC production And part of analysis dCache storage system (complicated) support fast and enormous data transferring from remote server Remote grid env PBS WN CMS User Interface NFS WN WN 1Gb/s T2 Resource Broker PhEDEx DCACHE Storage Element SRM Computing Element Global Local VOBox computing PBS storage WN BDII

New T3 site(1) Resource: Real Architecture: 第3页 New T3 site(1) Resource: 1 UI, 5 work nodes(40 cores) 2 Xeon 5345 cpu 4 cores 16GB RAM T2: 64 cpu cores Real Architecture: Login servers: cmsui01.ihep.ac.cn lxplus.ihep.ac.cn lxslc.ihep.ac.cn - PBS server: shared with other farms WN: cws012.ihep.ac.cn~cws016.ihep.ac.cn 公共批处理服务器 用户登录机群 lxplus lxslc cmsui01 , , CMS工作结点

New T3 site(2) CMSSW management User storage space management 第4页 New T3 site(2) CMSSW management Official version, shared with T2 /opt/exp_soft/cms/ Not reasonable to have another official version in T3 User storage space management Login home: /afs/ihep.ac.cn/users/…., not big enough to run your work, less than 1GB Working directory: /work, much bigger, 20T total(?)

New T3 site(3) Usage: huge analysis data downloaded by PhEDEx to SE 第5页 New T3 site(3) Usage: huge analysis data downloaded by PhEDEx to SE One way: copy SE to local NFS disk using SE tools Another way: Add another poolnode and pool in SE for local access, mounted to local T3 nodes just like local disk Warning: data in SE is not backed up Small analysis data filtered by crab job (less than 200MB) can be copied to local UI directly Huge production data submitted by crab to outside should be copied to SE, then downloaded to local NFS disk Hurt RB, if copied directly to local UI Not able to download to local NFS disk directly

The status of T2(1) DDT08: CCRC08 The status of T2_Beijing 第6页 The status of T2(1) DDT08: New metric: download link 20MB/s, upload link 10MB/s CCRC08 Dcache upgrade:1.7->1.8, srmv1->srmv2 Vobox: slc3->slc4 Phedex:2_5_2->2_6_2 Reach the specified transferring rate with IN2P3 The status of T2_Beijing Got 5 links, two with FNAL, two with IN2P3, one with CERN Reach our goal, the rate is higher than we expected If we have better SE, the rate should be a little higher

The status of T2(2) CMSSW installation procedure Job running 第7页 The status of T2(2) CMSSW installation procedure https://twiki.cern.ch/twiki/bin/view/CMS/CMSSWdeployment Job running CMS SAM tests:OK --- test basic functions and grid sites Job robot tests:OK --- crab job tests MC production tests:OK Computing resources ready now(100 cores) Additional cmssw1_4_9 needed Ask for a cerntain number of MC jobs to come in

CMS IHEP Twiki A documentation server established by CC: 第8页 CMS IHEP Twiki A documentation server established by CC: twiki.ihep.ac.cn : documents, guide, links indico.ihep.ac.cn: register meeting schedule and upload ppt report A special space for IHEP CMS a good place for communications in CMS issues https://twiki.ihep.ac.cn/twiki/bin/view/CMS/WebHome Usage: Easy to use, user guide is in the first page Everyone can put your information in , including: your document, your guide, userful link Make twiki a home for CMS physics Directory trees (discussion)

CMS IHEP grid operation 第9页 CMS IHEP grid operation Xiaomei zhang is responsible for all the respects of CMS computing YAN Xiaofei and Chen Liangchen helps on the system installation, configuration, management Regular computing meeting once two weeks

questions Anything missing? 第10页 questions Anything missing? Any applications needed in future grid uses?