Data Management in gLite

In order to proceed with these exercises, you need to:
• login to the glite-tutor.ct.infn.it machine
• Create a proxy with voms extensions using the command voms-proxy-init --voms gilda

• Use the command "lcg-infosites --vo gilda se" to inspect the available storage elements
• Inspect the contents of the Logical File Catalog (LFC) using "lfc-ls /"
• Use the command lfc-ls to inspect the directory tree of the LFC
• Can you tell in which machine/domain is the LFC running? (you may need to search for it using google or browse the gilda twiki)
• Create a directory under /grid/gilda/tutorials
• Use lfc-ls to make sure your directory was properly created
• Choose a favorite Storage Element (SE) from the list produced by lcg-infosites above (what happens?)
• Use the command lcg-cr to copy a file from your current directory to your chosen SE
• Check your copied files using lfc-ls
• Retrieve the SURL (Storage URL) or PFN (Physical File Name) of your file using lcg-lr
• Use the command lcg-rep to create multiple copies of your file
• Use the command lcg-cp to copy your file from the storage element to your current directory
• Try other commands such as lfc-ln, lfc-rm, lcg-del
• What is the difference between lfc-rm and lcg-del?
• Use the code examples available here to submit a job that will write to a file created in an SE

  For help with the commands visit the GILDA wiki training material web page and follow the exercises or visit the gLite documentation page