Get a file from Grid with 'rucio'

1. Setup the ATLAS environment and the rucio tools:

    lsetup rucio
   

2. Look for the collection on the Grid, specifying a scope (user:username) and a pattern:

    rucio list-dids user.username:user.username.EventPicking.RAW.part.01_event.dat.\*
   

   You will get a list of matching collections:

    | user.username:user.username....113967521 | DATASET |
    | user.username:user.username....113967512 | DATASET |
    | user.username:user.username....113943566 | DATASET |
    | user.username:user.username....113967555 | DATASET |
   

3. You can dowload the whole collection with this command:

   rucio get user.username:user.username....113967521

4. Also, you can see the content of one particular collection:

    rucio list-content user.username:user.username....113967521
   

   You will get a list of files in the collection:

    | user.username:...10378332._000016.event.dat | FILE |
    | user.username:...10378332._000017.event.dat | FILE |
    | user.username:...10378332._000018.event.dat | FILE |
    | user.username:...10378332._000019.event.dat | FILE |
    ...
   

5. and you can get a single file from the collection:

    rucio get user.username:user.username.10378332._000016.event.dat