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BNL’s Experience dCache1.8 and SRM V2.2

BNL’s Experience dCache1.8 and SRM V2.2. Carlos Fernando Gamboa Dantong Yu. RHIC/ATLAS computer facility Brook Haven National Lab. Table of Content. BNL’s dCache 1.8 storage and hardware configuration BNL’s dCache1.8 configuration Deployment problems

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BNL’s Experience dCache1.8 and SRM V2.2

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  1. BNL’s Experience dCache1.8 and SRM V2.2 Carlos Fernando Gamboa Dantong Yu RHIC/ATLAS computer facility Brook Haven National Lab LCG Storage workshop at CERN. July 2-3 2007. Geneva, Switzerland.

  2. Table of Content • BNL’s dCache 1.8 storage and hardware configuration • BNL’s dCache1.8 configuration • Deployment problems • Second re-deployment dCache 1.8 patch level 1 • General Commentaries • Future Plans LCG Storage workshop at CERN. July 2-3 2007. Geneva, Switzerland.

  3. BNL’s dCache storage and hardware configuration • BNL end point: srm://dct00.usatlas.bnl.gov:8443/srm/managerv2?SFN=//pnfs/usatlas.bnl.gov/data/dteam • Storage class REPLICA-ONLINE (Tape0Disk1) • BNL’s end point hardware specification • CPU speed 3400 MHz • Memory 4149240 KB • This is a server located outside BNL firewall • BNL's firewall not tape storage configured. • Disk space for storage 60GB LCG Storage workshop at CERN. July 2-3 2007. Geneva, Switzerland.

  4. BNL’s dCache1.8 configuration • All dCache 1.8 components are installed on same server • Components installed: • SRM V2.2 door • Dcap door • Gridftp door • GSIdcap door • Gplazma cell • 3 write pool of 20GB each one • PNFS LCG Storage workshop at CERN. July 2-3 2007. Geneva, Switzerland.

  5. BNL’s dCache1.8 configuration (cont.) • Space Manager Configuration • Standar configuration based on dCache’s PoolManager.conf default parameters (1 write link, 1 linkGroup) • VO access control configuration • Group accounts: dteam001, ops001, usatlas5, usatlas4, usatlas3, usatlas2, usatlas1 • VO:ATLAS • Roles: dteamRole=*, /atlas/Role=production /atlas/soft-valid/Role=production LCG Storage workshop at CERN. July 2-3 2007. Geneva, Switzerland.

  6. Deployment problemsdCache 1.8 patch level 1 - Stability LCG Storage workshop at CERN. July 2-3 2007. Geneva, Switzerland.

  7. Deployment problemsdCache 1.8 patch level 1 Tracing file from a specific test that reported SRM_REQUEST_QUEUED Files appeared on the write pool not (PnfsManager) admin > cacheinfoof 000100000000000000095F48 cacheinfoof 000100000000000000095F48 No pool was returned However, the file does exist on the pool: [root@dct00 data]# pwd /data/data5/dcache_pool_5/pool/data [root@dct00 data]# ls -l 000100000000000000095F48 -rw-r--r-- 1 root root 2691 May 24 15:01 000100000000000000095F48 Then looking in the admin on the pool (dct00_5) admin > rep ls -l 000100000000000000095F48 rep ls -l 000100000000000000095F48 000100000000000000095F48 <C-------X--(0)[0]> 2691 si={myStore:STRING} LCG Storage workshop at CERN. July 2-3 2007. Geneva, Switzerland.

  8. Deployment problemsdCache 1.8 patch level 1 (cont) • Authentication gPlazma: An entry on the DN of the user is not fully recreated authentication fails; differs from dn stored on kpwd file. Solution Work around: included the USER’s DN without the CN=xxxxx number. LCG Storage workshop at CERN. July 2-3 2007. Geneva, Switzerland.

  9. Second re-deployment dCache 1.8 patch level 1 dCache1.8 and pnfs was re-installed. LCG Storage workshop at CERN. July 2-3 2007. Geneva, Switzerland.

  10. General commentaries • Tuning Try several values for previous parameters until a stable configuration was found. • Learning curve Would be useful to have examples on using different SRM parameters for tuning purpose. LCG Storage workshop at CERN. July 2-3 2007. Geneva, Switzerland.

  11. General commentaries (cont.) Validation Looking forward to install dCache 1.8 patch level 6 and verify if previous strategy can be used to keep passing the tests. LCG Storage workshop at CERN. July 2-3 2007. Geneva, Switzerland.

  12. Future plans • Update dCache 1.8 patch level1 to patch level 6. • Setup a second test point with access to tape resource. LCG Storage workshop at CERN. July 2-3 2007. Geneva, Switzerland.

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