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HOW TO USE GRID STORAGE RESOURCES Branimir Acković acko@scl.rs Scientific Computing Laboratory

HOW TO USE GRID STORAGE RESOURCES Branimir Acković acko@scl.rs Scientific Computing Laboratory Institute of Physics Belgrade, Serbia. Overview. How to find available storage elements File transfer protocols LCG CLI Utils Logical File Catalog. File Transfer Protocols.

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HOW TO USE GRID STORAGE RESOURCES Branimir Acković acko@scl.rs Scientific Computing Laboratory

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  1. HOW TO USE GRID STORAGE RESOURCES Branimir Acković acko@scl.rs Scientific Computing Laboratory Institute of Physics Belgrade, Serbia

  2. Overview • How to find available storage elements • File transfer protocols • LCG CLI Utils • Logical File Catalog

  3. File Transfer Protocols • 1st Generation – GDMP + edg-replica-managerC++ base, used Globus for Secure file transfer • 2nd Generation – uses web services via XML

  4. Data Management Terminology • GUID – Globally Unique Identifier • LFN – Logical File Name • SURL - SiteURL

  5. LCG-Util CLI • lcg-aa - add an alias in the RMC or the LFC for a given GUID • lcg-cp - copy a Grid file to a local destination • lcg-cr - copy and register a file • lcg-del - delete one file (either one replica or all replicas)‏ • lcg-gt - get the TURL for a given SURL and transfer protocol • lcg-la - list the aliases for a given LFN, GUID or SURL • lcg-lg - get the GUID for a given LFN or SURL • lcg-lr - list the replicas for a given LFN, GUID or SURL • lcg-ra - remove an alias in the RMC or the LFC for a given GUID • lcg-rep - copy a file from one Storage Element to another Storage Element and registers it in the LRC or the LFC • lcg-rf - register in the LRC (and optionally in the RMC) or the LFC a file residing on an SE • lcg-sd - set file status to "Done" for a given SURL in a specified request • lcg-uf - unregister in the LRC or the LFC a file residing on an SE get the GUID for a given LFN or SURL

  6. LFC CLI • lfc-chmod - change access mode of a LFC directory/file in the name server • lfc-chown - change owner and group of a LFC directory/file in the name server • lfc-delcomment - delete the comment associated with a file/directory • lfc-entergrpmap - define a new group entry in Virtual Id table • lfc-enterusrmap - define a new user entry in Virtual Id table • lfc-getacl - get LFC directory/file access control lists • lfc-ln - make a symbolic link to a file or a directory in the LFC Name Server • lfc-ls - list LFC name server directory/file entries • lfc-mkdir - make LFC directory in the name server • lfc-modifygrpmap - modify group entry corresponding to a given virtual gid • lfc-modifyusrmap - modify user entry corresponding to a given virtual uid • lfc-rename - rename a LFC file or directory in the name server • lfc-rm - remove LFC files or directories in the name server • lfc-rmgrpmap - suppress group entry corresponding to a given virtual gid or group name get the GUID for a given LFN or SURL

  7. LFC CLI • lfc-rmusrmap - suppress user entry corresponding to a given virtual uid or user name • lfc-setacl - set LFC directory/file access control lists • lfc-setcomment - add/replace a comment associated with a file/directory

  8. Links • http://grid-deployment.web.cern.ch/grid-deployment/documentation/LFC_DPM/lcg_util /html/ • https://twiki.cern.ch/twiki/bin/view/LCG/LfcApi

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