1. EGEE-II INFSO-RI-031688 Enabling Grids for E-sciencE www.eu-egee.org gLite Demo Yaodong Cheng CC-IHEP, Chinese Academy of Sciences chyd@ihep.ac.cn The 6th Joint Training of OMII-Europe&CNGrid, Hong Kong, 10-11 January, 2008

2. Enabling Grids for E-sciencE EGEE-II INFSO-RI-031688 The 6th Joint Training of OMII-Europe&CNGrid, Hong kong, 10-11 January, 2008 2/39 Start… Follow the link http://training.omii-europe.org/Tutorials/glite3.0/Tutorials.html Login into UI –ssh UI_Machine -l chyd –wget http://training.omii- europe.org/Tutorials/glite3.0/tutorial.tar.gz –tar -xvzf tutorial.tar.gz

3. Enabling Grids for E-sciencE EGEE-II INFSO-RI-031688 The 6th Joint Training of OMII-Europe&CNGrid, Hong kong, 10-11 January, 2008 3/39 outline Security –globus –VOMS Information Systems Workload Management System (WMS) Data Management

4. Enabling Grids for E-sciencE EGEE-II INFSO-RI-031688 The 6th Joint Training of OMII-Europe&CNGrid, Hong kong, 10-11 January, 2008 4/39 Security If you want to use grid resource, you need to: – get your certificate from trusted CA – Join a VO (dteam, gilda, atlas, cms, bes, …)  Send request to given VOMS server (web) – Log into a UI (local or ssh remote machine) –Create your proxy  Sign a new short lived certificate using your certificate in order to vulnerability Proxy operations –Create –Query –Destroy

5. Enabling Grids for E-sciencE EGEE-II INFSO-RI-031688 The 6th Joint Training of OMII-Europe&CNGrid, Hong kong, 10-11 January, 2008 5/39 Security Demo List your certificate –[chyd@glitedemo2 chyd]$ ls -l ~/.globus -rw-r--r-- 1 chyd u07 2360 Jan 7 17:36 usercert.pem -rw------- 1 chyd u07 1916 Jan 7 17:36 userkey.pem Inspect what your public key contains –[chyd@glitedemo2 chyd]$ grid-cert-info Certificate: Data: Version: 3 (0x2) Serial Number: 306 (0x132) Signature Algorithm: sha1WithRSAEncryption Issuer: C=CN, O=HEP, CN=gridca-cn/Email=gridca@ihep.ac.cn Validity Not Before: May 13 13:44:22 2007 GMT Not After : May 12 13:44:22 2008 GMT Subject: C=CN, O=HEP, O=IHEP, OU=CC, CN=yaodong cheng Subject Public Key Info: Public Key Algorithm: rsaEncryption RSA Public Key: (2048 bit) Modulus (2048 bit): 00:dc:42:64:bf:1b:61:f1:75:8f:ce:9e:8f:75:a1: 3a:7d:2b:e5:41:1b:de:c1:2d:be:f0:8a:75:73:ef: …

6. Enabling Grids for E-sciencE EGEE-II INFSO-RI-031688 The 6th Joint Training of OMII-Europe&CNGrid, Hong kong, 10-11 January, 2008 6/39 Proxy Create proxy –[chyd@glitedemo2 chyd]$ grid-proxy-init Your identity: /C=CN/O=HEP/O=IHEP/OU=CC/CN=yaodong cheng Enter GRID pass phrase for this identity: Creating proxy................................................. Done Your proxy is valid until: Tue Jan 8 21:39:29 2008 Query proxy info –[chyd@glitedemo2 chyd]$ grid-proxy-info subject : /C=CN/O=HEP/O=IHEP/OU=CC/CN=yaodong cheng/CN=proxy issuer : /C=CN/O=HEP/O=IHEP/OU=CC/CN=yaodong cheng identity : /C=CN/O=HEP/O=IHEP/OU=CC/CN=yaodong cheng type : full legacy globus proxy strength : 512 bits path : /tmp/x509up_u60003 timeleft : 11:59:19 VOMS proxy –Extends the proxy with info on VO membership, group, roles –Voms-proxy-init –voms VO_NAME –VOMS-proxy-info –all –VOMS-proxy-destroy

7. Enabling Grids for E-sciencE EGEE-II INFSO-RI-031688 The 6th Joint Training of OMII-Europe&CNGrid, Hong kong, 10-11 January, 2008 7/39 Testing proxy cd /home/chyd/omii/tutorial [chyd@glitedemo2 tutorial]$ edg-job-list-match --vo dteam hostname.jdl Selected Virtual Organisation name (from --vo option): dteam Connecting to host lcg005.ihep.ac.cn, port 7772 *************************************************************************** COMPUTING ELEMENT IDs LIST The following CE(s) matching your job requirements have been found: a01-004-128.gridka.de:2119/jobmanager-pbspro-gLite3 … apcpc79.in2p3.fr:2119/jobmanager-pbs-dteam [chyd@glitedemo2 tutorial]$ grid-proxy-destroy [chyd@glitedemo2 tutorial]$ edg-job-list-match --vo dteam hostname.jdl Selected Virtual Organisation name (from --vo option): dteam **** Error: UI_PROXY_NOT_FOUND **** Proxy certificate not found.

8. Enabling Grids for E-sciencE EGEE-II INFSO-RI-031688 The 6th Joint Training of OMII-Europe&CNGrid, Hong kong, 10-11 January, 2008 8/39 Information Demo

9. Enabling Grids for E-sciencE EGEE-II INFSO-RI-031688 The 6th Joint Training of OMII-Europe&CNGrid, Hong kong, 10-11 January, 2008 9/39 Information system The Information System (IS) provides information about grid´s resources and their actual status Resource level: Grid Resource Information Server (GRIS) –One GRIS on top of each CE, SE, RB, MyProxy (no WNs). –Sensors and scripts get status of concrete resources statically (e.g. GlueCEUniqueID) or dynamically (e.g. GlueCEStateWaitingJobs) Site level: Grid Index Information Server (GIIS) –Compiles all the information of the different GRISs in a site. –LCG-2 recommends using a BDII instead of a GIIS  Improves robustness and stability.  Called the site BDII. Top level: Berkeley DB Information Index (BDII) –Keeps all Grid information about the VOs (generally only one). –Stores information from local BDIIs or GIISs in its database. –Only queries sites that are included in a configuration file.

10. Enabling Grids for E-sciencE EGEE-II INFSO-RI-031688 The 6th Joint Training of OMII-Europe&CNGrid, Hong kong, 10-11 January, 2008 10/39 BDII RB Local GRIS SE Local GRIS CE Local GRIS BDII-A BDII-B SE Local GRIS SE Local GRIS CE Local GRIS SE Local GRIS BDII-C Site 1 Site 2 Site 3 Site BDII

11. Enabling Grids for E-sciencE EGEE-II INFSO-RI-031688 The 6th Joint Training of OMII-Europe&CNGrid, Hong kong, 10-11 January, 2008 11/39 lcg-infosites Actually just a perl script wrapping a series of LDAP commands –allow the user to retrieve information on Grid resources for the most common cases Query CE –[chyd@glitedemo2 tutorial]$ lcg-infosites --vo dteam ce|more #CPU Free Total Jobs Running Waiting ComputingElement ---------------------------------------------------------- 121 0 0 0 0 ce.phy.bg.ac.yu:2119/jobmanager-pbs-dteam 457 1 0 0 0 ce64.phy.bg.ac.yu:2119/jobmanager-pbs-dteam 126 2 0 0 0 fangorn.man.poznan.pl:2119/jobmanager-pbs-dteam 32 2 0 0 0 agh2.atlas.unimelb.edu.au:2119/jobmanager-lcgpbs-dteam –lcg-infosites –v 1 or 2  -v 1: Only the names of the queues are given  -v 2: more information, RAMMemory, Operation system and its version, the processors

12. Enabling Grids for E-sciencE EGEE-II INFSO-RI-031688 The 6th Joint Training of OMII-Europe&CNGrid, Hong kong, 10-11 January, 2008 12/39 lcg-infosites (cont.) Query SE –[chyd@glitedemo2 tutorial]$ lcg-infosites --vo dteam se Avail Space(Kb) Used Space(Kb) Type SEs ---------------------------------------------------------- 16070000000 34 n.a se.phy.bg.ac.yu 4378660000 301320000 n.a se1.egee.man.poznan.pl 21530000000 2108852 n.a agh3.atlas.unimelb.edu.au –Obtain which SE is closest to which CE.  The term "close" in grids can have several interpretations including physical distance apart and speed of data access (available bandwidth)  The closest SE to a CE is defined by the manager of the CE.  To see the closet SE to each CE use the command: [chyd@glitedemo2 tutorial]$ lcg-infosites --vo dteam closeSE Name of the CE: grid-ce.lns.infn.it:2119/jobmanager-lcgpbs-infinite grid-se.lns.infn.it Name of the CE: t2-ce-01.mi.infn.it:2119/jobmanager-lcgpbs-cert t2-se-01.mi.infn.it

13. Enabling Grids for E-sciencE EGEE-II INFSO-RI-031688 The 6th Joint Training of OMII-Europe&CNGrid, Hong kong, 10-11 January, 2008 13/39 Workload Management System

14. Enabling Grids for E-sciencE EGEE-II INFSO-RI-031688 The 6th Joint Training of OMII-Europe&CNGrid, Hong kong, 10-11 January, 2008 14/39 Simple job cd /home/chyd/omii/tutorial more hostname.jdl # Type = "Job"; JobType = "Normal"; Executable = "/bin/hostname"; StdOutput = "hostname.out"; StdError = "hostname.err"; OutputSandbox = {"hostname.err","hostname.out"}; Arguments = "-f"; ShallowRetryCount = 3; RetryCount = 0; edg-job-submit --vo dteam -o jobid hostname.jdl more jobid ###Submitted Job Ids### https://lcg005.ihep.ac.cn:9000/YJ9ZXtspVpiaFHwxUGr36g edg-job-status -i jobid

15. Enabling Grids for E-sciencE EGEE-II INFSO-RI-031688 The 6th Joint Training of OMII-Europe&CNGrid, Hong kong, 10-11 January, 2008 15/39 hostname.jdl JobType = "Normal"; –The type of job to run. One of: Normal (simple, sequential job), interactive, MPICH Executable = "/bin/hostname"; –The executable that is eventually run on the worker node. StdOutput = "hostname.out"; –All the standard output of the job will be stored in the named file StdError = "hostname.err"; –All the standard output of the job will be stored in the named file OutputSandbox = {"hostname.err","hostname.out"}; –List of files created by the job which have to be retrieved. Arguments = "-f"; –The arguments passed to the executable as a string ShallowRetryCount = 3; –If the job fails before arriving at the worker node the number of times to attempt resubmitting the job. RetryCount = 0; –If the job fails after arriving at the worker node the number of times to attempt resubmitting the job

16. Enabling Grids for E-sciencE EGEE-II INFSO-RI-031688 The 6th Joint Training of OMII-Europe&CNGrid, Hong kong, 10-11 January, 2008 16/39 Get output edg-job-status -i jobid Status info for the Job : https://lcg005.ihep.ac.cn:9000/YJ9ZXtspVpiaFHwxUGr36g Current Status: Done (Success) Exit code: 0 Status Reason: Job terminated successfully Destination: dgc-grid-35.brunel.ac.uk:2119/jobmanager-lcgpbs-rampdown reached on: Tue Jan 8 03:02:36 2008 edg-job-get-output -i jobid Output sandbox files for the job: - https://lcg005.ihep.ac.cn:9000/YJ9ZXtspVpiaFHwxUGr36g have been successfully retrieved and stored in the directory: /tmp/jobOutput/chyd_YJ9ZXtspVpiaFHwxUGr36g cd /tmp/jobOutput/chyd_YJ9ZXtspVpiaFHwxUGr36g [lcg003] /tmp/jobOutput/chyd_YJ9ZXtspVpiaFHwxUGr36g > ls hostname.err hostname.out more hostname.out dgc-grid-37.brunel.ac.uk

17. Enabling Grids for E-sciencE EGEE-II INFSO-RI-031688 The 6th Joint Training of OMII-Europe&CNGrid, Hong kong, 10-11 January, 2008 17/39 env.jdl edg-job-submit --vo dteam -o jobid env.jdl More env.jdl JobType = "Normal"; Executable = "/bin/bash"; StdOutput = "env.out"; StdError = "env.err"; InputSandbox = {"getenv.sh"}; OutputSandbox = {"env.err","env.out","Env.txt"}; Arguments = "getenv.sh"; ShallowRetryCount = 3; RetryCount = 0; InputSandbox = {"getenv.sh"}; –Not available on any of the worker nodes Executable = "/bin/bash"; Arguments = "getenv.sh"; –File permissions may change when “getenv.sh” is transferred

18. Enabling Grids for E-sciencE EGEE-II INFSO-RI-031688 The 6th Joint Training of OMII-Europe&CNGrid, Hong kong, 10-11 January, 2008 18/39 env.jdl OutputSandbox = {"env.err","env.out","Env.txt"}; –Env.tex is produced by getenv.sh, which looks like #!/bin/bash host=`hostname -f` echo Getting Env On $host env > Env.txt edg-job-status -i jobid Current Status: Done (Success) Exit code: 0 Status Reason: Job terminated successfully Destination: lcg2ce.ific.uv.es:2119/jobmanager-pbs-dteamL reached on: Tue Jan 8 03:42:08 2008 edg-job-get-output -i jobid ls –l /tmp/jobOutput/chyd_m23nUzTmKg9ftHzyGtd6yQ -rw-r--r-- 1 chyd zh 0 Jan 8 11:51 env.err -rw-r--r-- 1 chyd zh 32 Jan 8 11:51 env.out -rw-r--r-- 1 chyd zh 4450 Jan 8 11:51 Env.txt

19. Enabling Grids for E-sciencE EGEE-II INFSO-RI-031688 The 6th Joint Training of OMII-Europe&CNGrid, Hong kong, 10-11 January, 2008 19/39 Specify requirements more req1.jdl # Type = "Job"; JobType = "Normal"; Executable = "/bin/bash"; StdOutput = "env.out"; StdError = "env.err"; InputSandbox = {"getenv.sh"}; OutputSandbox = {"env.err","env.out","Env.txt"}; Arguments = "getenv.sh"; ShallowRetryCount = 3; RetryCount = 0; Requirements = (other.GlueCEUniqueID == "moss-g4.man.poznan.pl:2119/blah-pbs- omiieurope"); You can get these requirements from information system –lcg-infosites –lcg-info

20. Enabling Grids for E-sciencE EGEE-II INFSO-RI-031688 The 6th Joint Training of OMII-Europe&CNGrid, Hong kong, 10-11 January, 2008 20/39 Data Management DEMO

21. Enabling Grids for E-sciencE EGEE-II INFSO-RI-031688 The 6th Joint Training of OMII-Europe&CNGrid, Hong kong, 10-11 January, 2008 21/39 Environment variables $ echo $LCG_GFAL_INFOSYS –lcg007.ihep.ac.cn:2170 echo $LCG_CATALOG_TYPE –lfc echo $LFC_HOST –gilda02.ihep.ac.cn If one or more of them has different or empty value, please set it (them) in this way: for example –export LCG_GFAL_INFOSYS=lcg007.ihep.ac.cn:2170 –export LCG_CATALOG_TYPE=lfc –export LFC_HOST=gilda02.ihep.ac.cn

22. Enabling Grids for E-sciencE EGEE-II INFSO-RI-031688 The 6th Joint Training of OMII-Europe&CNGrid, Hong kong, 10-11 January, 2008 22/39 Command sets Two sets of commands –lfc-*  Interact with the LFC catalogue server that manages logical filenames (lfns), including mapping logical filenames to filenames to "site URLs". –lcg-*  Used to copy files to and from an SE, and to replicate files  Interact with both the storage elements and the catalogue server LFC SE lfc-* lcg-* UI

23. Enabling Grids for E-sciencE EGEE-II INFSO-RI-031688 The 6th Joint Training of OMII-Europe&CNGrid, Hong kong, 10-11 January, 2008 23/39 LFC Catalog commands lfc-chmodChange access mode of the LFC file/directory lfc-chownChange owner and group of the LFC file-directory lfc-delcommentDelete the comment associated with the file/directory lfc-getaclGet file/directory access control lists lfc-lnMake a symbolic link to a file/directory lfc-lsList file/directory entries in a directory lfc-mkdirCreate a directory lfc-renameRename a file/directory lfc-rmRemove a file/directory lfc-setaclSet file/directory access control lists lfc-setcommentAdd/replace a comment

24. Enabling Grids for E-sciencE EGEE-II INFSO-RI-031688 The 6th Joint Training of OMII-Europe&CNGrid, Hong kong, 10-11 January, 2008 24/39 Listing file and directory For each of the supported VO a separate "top level" directory exists under the "/grid" directory. You can see all the files that are stored for the gilda VO. First ensure you have a running VOMS proxy and then type: –$ lfc-ls -l /grid/dteam You will see a listing of the contents of the /grid/dteam, directory. Rather than having to type an absolute path for every file and directory you use, it is instead possible to define a HOME directory from which you may use relative file/directory paths. Set this now by setting the environment variable LFC_HOME as follows: –$ export LFC_HOME=/ grid/dteam/tutorial

25. Enabling Grids for E-sciencE EGEE-II INFSO-RI-031688 The 6th Joint Training of OMII-Europe&CNGrid, Hong kong, 10-11 January, 2008 25/39 Create directory Before creating and uploading any of your own files create a personal directory for storage by typing: –$ lfc-mkdir $USER To check that you have created your directory type: –$ lfc-ls -l and you should see your directory (plus possibly those of other attendees).

26. Enabling Grids for E-sciencE EGEE-II INFSO-RI-031688 The 6th Joint Training of OMII-Europe&CNGrid, Hong kong, 10-11 January, 2008 26/39 Add metadata information lfc-setcomment path comment lfc-setcomment adds/replaces a comment associated with a file/directory in the LFC Catalog Example: lfc-setcomment / grid/dteam/tutorial / ‘Hello World’ Check your job with lfc-ls --comment –l /grid/dteam/tutorial drwxr-xr-x 0 119 104 0 Jan 08 16:04 john hello world

27. Enabling Grids for E-sciencE EGEE-II INFSO-RI-031688 The 6th Joint Training of OMII-Europe&CNGrid, Hong kong, 10-11 January, 2008 27/39 Delete metadata information lfc-delcomment path lfc-delcomment deletes a comment previously added Example: lfc-delcomment /grid/dteam/tutorial/ Check if it was successful with lfc-ls --comment -l drwxr-xr-x 0 119 104 0 Jan 08 16:04 john

28. Enabling Grids for E-sciencE EGEE-II INFSO-RI-031688 The 6th Joint Training of OMII-Europe&CNGrid, Hong kong, 10-11 January, 2008 28/39 lcg-utils The LCG Data Management tools (usually called lcg-utils) allow users to copy files between UI, CE, WN and a SE, to register entries in the File Catalogs and replicate files between SEs. Check if LCG_GFAL_INFOSYS environment variable is correctly set to the local GILDA Information Index (BDII) –Eg: export LCG_GFAL_INFOSYS= lcg007.ihep.ac.cn:2170

29. Enabling Grids for E-sciencE EGEE-II INFSO-RI-031688 The 6th Joint Training of OMII-Europe&CNGrid, Hong kong, 10-11 January, 2008 29/39 lcg-utils commands lcg-cp Copies a Grid file to a local destination lcg-cr Copies a file to a SE and registers the file in the LRC lcg-del Deletes one file (either one replica or all replicas) lcg-lg Gets the guid for a given lfn or surl lcg-rep Copies a file from SE to SE and registers it in the LRC lcg-aa Adds an alias in RMC for a given guid lcg-la Lists the aliases for a given LFN, GUID or SURL lcg-gt Gets the turl for a given surl and transfer protocol lcg-lr Lists the replicas for a given lfn, guid or surl lcg-ra Removes an alias in RMC for a given guid lcg-rf Registers a SE file in the LRC (optionally in the RMC) lcg-uf Un-registers a file residing on an SE from the LRC

30. Enabling Grids for E-sciencE EGEE-II INFSO-RI-031688 The 6th Joint Training of OMII-Europe&CNGrid, Hong kong, 10-11 January, 2008 30/39 Upload file into SE use lcg-infosites in order to find which the available SE –$[lcg003] /home/chyd > lcg-infosites --vo dteam se|grep ihep.ac.cn –307078859 867594697 n.a cmsse01.ihep.ac.cn –3912097491 86517061 n.a srm.ihep.ac.cn –266947853 854038611 n.a atlasse01.ihep.ac.cn –531101511 216222799 n.a lcg004.ihep.ac.cn The command is lcg-cr (LCG copy and register). Type the following to store this file on the lcg004.ihep.ac.cn storage element $ lcg-cr --vo dteam -v -d lcg004.ihep.ac.cn -l lfn:/grid/dteam/chyd/hosts file:///etc/hosts guid:41a0c124-7f2f-44fd-bb10-b3a820d1f72c

31. Enabling Grids for E-sciencE EGEE-II INFSO-RI-031688 The 6th Joint Training of OMII-Europe&CNGrid, Hong kong, 10-11 January, 2008 31/39 Get the file SURL For several purpose, FTS for instance, is useful to know the file SURL (they can be many if the file has replicas somewhere). The appropriate command is lcg-lr (list-replicas) [lfn | guid] –[lcg003] /home/chyd > lcg-lr --vo dteam lfn:/grid/dteam/chyd/hosts srm://lcg004.ihep.ac.cn/pnfs/ihep.ac.cn/data/dteam/generated/20 08-01-08/file56ecb1c7-62dc-40e7-95aa-37b5a4635455

32. Enabling Grids for E-sciencE EGEE-II INFSO-RI-031688 The 6th Joint Training of OMII-Europe&CNGrid, Hong kong, 10-11 January, 2008 32/39 Replicate file A file can be stored on multiple SE's and then a running job can access the closest SE with the file on it, thus giving faster access times to the data. This also helps protect against failures/access difficulties with a particular SE. To find the list of SE'S available to you see the tutorial on lcg-infosites which can be found here. We will replicate the file just created to the SE lcg004.ihep.ac.cn with the command –$ lcg-rep -v --vo dteam -d srm-dteam.cern.ch lfn:/grid/dteam/chyd/hosts There is no output from this command on success, but you can check that the replica was created by listing all the replicas of your file, that is done by using the LCG list replicas command: –$lcg-lr --vo dteam lfn:/grid/dteam/chyd/hosts You should get two replicas listed, as here: srm://lcg004.ihep.ac.cn/pnfs/ihep.ac.cn/data/dteam/generated/2008-01- 08/file56ecb1c7-62dc-40e7-95aa-37b5a4635455 srm://srm-dteam.cern.ch/castor/cern.ch/grid/dteam/generated/2008-01- 08/file75d0c933-64e1-4078-8a2d-237e5bf2e6d8

33. Enabling Grids for E-sciencE EGEE-II INFSO-RI-031688 The 6th Joint Training of OMII-Europe&CNGrid, Hong kong, 10-11 January, 2008 33/39 Create symbolic link As an example of some of some of the other functionality available a second lfn for the file you uploaded is created. This is very similar to the Unix symbolic link. A second lfn is created with the command: –$ lfc-ln -s /grid/dteam/chyd/hosts /grid/dteam/chyd/hosts_ln Note the file path for the source file was used so as to avoid problems with relative links being used from the wrong directory. If you now list the contents of your directory you should see both names, but the symbolic link has 0 size and also the link target is shown: –$ lfc-ls -l /grid/dteam/chyd -rw-r--r-- 1 119 104 187 Jan 08 16:22 hosts lrwxrwxrwx 1 119 104 0 Jan 08 16:37 hosts_ln -> /grid/dteam/chyd/hosts

34. Enabling Grids for E-sciencE EGEE-II INFSO-RI-031688 The 6th Joint Training of OMII-Europe&CNGrid, Hong kong, 10-11 January, 2008 34/39 Download a file from SE to UI Having already uploaded a file the next step is to show downloading a file. To download the file you already uploaded using the new lfn you have just created use the command: –$ lcg-cp --vo dteam lfn:/grid/dteam/chyd/hosts file:///$PWD/hosts You can check that the file you just downloaded is the same as the file you uploaded with cat command –$ cat hosts

35. Enabling Grids for E-sciencE EGEE-II INFSO-RI-031688 The 6th Joint Training of OMII-Europe&CNGrid, Hong kong, 10-11 January, 2008 35/39 lcg-aa Adding an alias for a given GUID lcg-aa --vo vo guid lfn where  vo specifies the Virtual Organization the user belongs to  guid specifies the Grid Unique Identifier of the file you want to add the alias to  lfn specifies the new alias Example: – $ lcg-lg lfn:/grid/dteam/chyd/hosts guid:41a0c124-7f2f-44fd-bb10-b3a820d1f72c – $ lcg-aa --vo dteam guid:41a0c124-7f2f-44fd-bb10- b3a820d1f72c lfn:/grid/dteam/chyd/hosts_alias

36. Enabling Grids for E-sciencE EGEE-II INFSO-RI-031688 The 6th Joint Training of OMII-Europe&CNGrid, Hong kong, 10-11 January, 2008 36/39 lcg-la To check if the previous command was successful, you can use lcg-la command to list the aliases for a given LFN, GUID or SURL lcg-la lfn:/grid/dteam/chyd/hosts lfn:/grid/dteam/chyd/hosts lfn:/grid/dteam/chyd/hosts_ln lfn:/grid/dteam/chyd/hosts_alias

37. Enabling Grids for E-sciencE EGEE-II INFSO-RI-031688 The 6th Joint Training of OMII-Europe&CNGrid, Hong kong, 10-11 January, 2008 37/39 lcg-gt get the TURL for a given SURL and transfer protocol $ lcg-gt surl protocol –surl: specifies the Site URL. An SURL scheme can be sfn: for a classical SE or srm: –Protocol: specifies the protocol which will be used to access the file. $ lcg-lr lfn:/grid/dteam/chyd/hosts srm://lcg004.ihep.ac.cn/pnfs/ihep.ac.cn/data/dteam/generated/2008-01-08/file56ecb1c7-62dc-40e7-95aa- 37b5a4635455 srm://srm-dteam.cern.ch/castor/cern.ch/grid/dteam/generated/2008-01-08/file75d0c933-64e1-4078-8a2d- 237e5bf2e6d8 $ lcg-gt srm://lcg004.ihep.ac.cn/pnfs/ihep.ac.cn/data/dteam/generated/2008-01- 08/file56ecb1c7-62dc-40e7-95aa-37b5a4635455 dcap dcap://lcg004.ihep.ac.cn:22125//pnfs/ihep.ac.cn/data/dteam/generated/200 8-01-08/file56ecb1c7-62dc-40e7-95aa-37b5a4635455 $ lcg-gt srm://srm- dteam.cern.ch/castor/cern.ch/grid/dteam/generated/2008-01- 08/file75d0c933-64e1-4078-8a2d-237e5bf2e6d8 rfio rfio://castorpublic.cern.ch:9002?svcClass=dteam&castorVersion=2&path=/castor/c ern.ch/grid/dteam/generated/2008-01-08/file75d0c933-64e1-4078-8a2d-237e5bf2e6d8

38. Enabling Grids for E-sciencE EGEE-II INFSO-RI-031688 The 6th Joint Training of OMII-Europe&CNGrid, Hong kong, 10-11 January, 2008 38/39 References WMS User's Guide https://edms.cern.ch/file/572489/1/EGEE-JRA1-TEC-572489-WMS-guide-v0-2.pdf JDL Attributes Specification Fabrizio Pacini https://edms.cern.ch/file/555796/1/EGEE-JRA1-TEC-555796-JDL-Attributes-v0- 8.pdf Omii-Europe training http://training.omii-europe.org/Tutorials/glite3.0/Tutorials.html

39. Enabling Grids for E-sciencE EGEE-II INFSO-RI-031688 The 6th Joint Training of OMII-Europe&CNGrid, Hong kong, 10-11 January, 2008 39/39