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<!-- keep this as a security measure: * Set ALLOWTOPICCHANGE = Main.TWikiAdminGroup,Main.LCGAdminGroup * Set ALLOWTOPICRENAME = Main.TWikiAdminGroup,Main.LCGAdminGroup #uncomment this if you want the page only be viewable by the internal people * #Set ALLOWTOPICVIEW = Main.TWikiAdminGroup,Main.LCGAdminGroup --> ---+ Phenix updated installation and configuration status - 2nd March 2007 * Minutes of the phone call held the 2nd March 2007 * Participants: * Sergio Maffioletti ---+++ Status of installation and configuration * *WN (X2200)* * SLC4.4 [tobe finalized and integrated into cfengine] * *CE (X4200)* * 1 X4200 used for PNFS + postgres [ok] * *Thumper* * 1 Thumper integrated as pool node [ok] * Configuration of pools (Alessandro will report) * *Problem encoutered, solutions and workarounds* * * *Tests* (tentative dates) * Reliability tests on whole system (Derek + Tom + Alessandro) --> * Performance test from WNs to Thumpers via dcache (Derek + Sigve + Alessandro) --> * Test different configurations of ZSF [ok] * *Organisation of the dCache tests* * functionality tests * VO codes * local load tests (mainly dcap): * writing files in parallel from multiple nodes * reading same file from multiple nodes * trying to write file that is being written by another process * erasing file that is being read by another process * measure I/O rates as function of parallel clients * WAN protocol tests (SRM, gridftp) * CMS PhEDEx transfers * Storage access profile of CMS jobs -> they will use dcap protocol * Storage access profile of Atlas jobs -> for those using ARC, maily the access is through SRM and/or Gridftp * each VO should prepare their own specific tests * General test suite ( local and wan test ) will be prepared by Derek * Sigve will forward the test description to the Atlas contact to check if Atlas will need additional tests ---+++ SE dcache configuration scenario * is it necessary to mount PNFS on Thumper ? apparently yes if Thumper is running Gridftp ( thanks to Lionel Schwarz ) * what is necessary for WN to use the dcap protocol to access the dcache pools ? apparently the client-only dcache package ( Alessandro will check ) ---+++ What bandwidth can we expect: * We may have preformance problem from Dalco WNs to Thumper due to single Gb link from switch to switch ---+++ Deadlines * next week --> tests * 15th March --> production ---+++ AOB * update UI machine (Strange java exception errors)? * UI will be re-installed in the next two weeks * Proposal to migrate to a server box ( gain reliability ) * VOBoxes * should we reinstall as true LCG VO-Boxes? This would provide gsissh and easier myproxy management * We are planning to migrate these boxes anyway * responsibility for Twiki areas (CSCS will take care) * Create 1 page per VO * add a page with logs of problems * VOBoxes page with info about how to start services --- ---++ Resume of the Configuration * 1 X2200 = cluster management system * 1 X2200 = SRM + dcache domains + LCG SE related software * 1 X4200 = PNFS + posgres * 1 X4500 Thumpers = Gridftpd + dcache pool node * 1 X4500 Thumpers = Gridftpd + dcache pool node * ZFS configuration (Proposal): * 1 Thumper test with 4 Raid and 2 parity disks = 16TB + 4 spare disks * 1 Thumper test with 4 Raid and 1 parity disk = 18TB + 4 spare disks * 1 ZFS pool per Thumper * 1 Filesystem per VO per Thumper * each VO gets space on both Thumpers * Thumper dcache configuration * each Thumper will have 1 dcache pool per VO/FS (CMS,Atlas,dteam) * 1 Thumper will also have FS for lhcb and hone --- -- Main.SergioMaffioletti - 2 March 2007
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Topic revision: r2 - 2007-03-02
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SergioMaffioletti
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