Böhringer, S.

Halstenberg, S.

Ressmann, D.

van Wezel, J.

Wezel, J. van

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Forschungszentrum Karlsruhe GmbH, Institute for Scientific Computing, Postfach 36 40, 76021 KarlsruheDoris Ressmann, Stephanie Böhringer, Silke Halstenberg, Jos van WezelData storage layout and architecture of the German T1dCache storage area866 TB storage on 233 dCache poolsFurther GridKa poster:75 A distributed approach for a regional grid operation centre by Sven Hermann82 An interface to tape for disk pool managers by Jos van Wezel92 Monitoring a WLCG Tier-1 computing facility aiming at a reliable 24/7 service by Andreas Heiss96 Beyond Grid Security by Bruno HoeftdCache poolsdCacheh12x2.8GHz     2.5 GB mem31GB disk SL4 kernel:2.6.9-34dcapdirDomainutilityDomainlmDomaindCacheDomainAdmin-doorhttpdDomainStatisticDomainxrootdDomaingPlazmagridka-dCache.fzk.de1x1.9GHz    4GB mem172GB system 92 GB dB SL-CERN kernel: 2.6.9-42gLite-SEsrmDomainInfoProviderSRM Postgres DBF01-015-103Billing DBSRM WatchF01-015-1111x3GHz   4GB mem32GB disk mirror135GB dB SL4Kernel:2.6.9-34pnfsServerPostgres DBpnfsManagerCompanion DBdCache ManagementdCache 1.8 in pre production• SRM 2.2 • limited VO support in pre production• OPS, DTEAM, ATLAS, CMS, LHCb• Tape connection• dedicated  TSM server• testing new Tape library • testing our dCache – TSM connection• gPlazma authentication• different roles e.g. for space reservation• separation of SE and SRM node• SE on a small virtual machineGridKa Data ManagementAt GridKa we have different types of storage areas. • the classic storage elementaccessible only from the private network, using NFS mounted GPFS file-systems and access via xrootd• production dCache version 1.7• accessible worldwide via LCG-GFAL, FTS, SRM v1, gridftp• accessible from the private network via dcap, xrootd, gridftp, SRM v1• preproduction dCache version 1.8This installation is for testing all new SRM 2.2 features, to be ready to install the new dCache version in production as soon as a stable dCache 1.8  version has been released. 48 Pools48 TB T0D1155 TB Tape connected53 Pools127 TB T0D191 TB Tape connectedno dCache  Pools62 Pools16 TB T0D1286 TB Tape connectedc13 Pools12 TB Tape connected13 Pools17 TB Tape connectedno dCache  Pools26 Pools51 TB T0D16 TB Tape connectedDTEAM / OPS / DECH16 Pools8 TB T0D114 TB Tape connected2 Pools30 TB Tape connecteddCache FileserverAlways two dCache file server have access to the same disk area, as such if one file server crashes, it is straight forward for the second to start the pools of the failed machine.Pool SetupThis picture illustrates the pool setup for one of the LHC experiments and the connection to the external (Tier 0,1,2) sites. For simplicity reasons the dCache management nodes and TSM server are missing in this picture.read/write poolsTSMStorage Agentsread poolTSMStorage Agentdisk-only poolsinput bufferwrite poolsTSMStorage Agentsfile hoppingconstant streamCERNTier0/1/2read poolsfile hoppingfile hopping

Data storage layout and architecture of the German T1

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Data storage layout and architecture of the German T1

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