Sometimes it is useful to know where a particular dataset (or replica) is physically stored. To get the list of all sites known to rucio, referred to as Rucio Storage Elements (RSE), type:
rucio list-rses
This will give you an output like:
AGLT2_CALIBDISK
AGLT2_DATADISK
AGLT2_LOCALGROUPDISK
...
ZA-WITS-CORE_LOCALGROUPDISK
ZA-WITS-CORE_PRODDISK
ZA-WITS-CORE_SCRATCHDISK
It is possible to further restrict the possible results by adding an expression argument, such as:
rucio list-rses --expression "cloud=UK"
To find the locations of particular files, datasets or containers (in fact any DID object), then the following commands can be used:
rucio list-dataset-replicas <scope>:<name>
or
rucio list-file-replicas <scope>:<name>
In fact the list-file-replicas options should work for any DID
(e.g., files, datasets, … ).
Exercise
Find the locations of the data15_13TeV dataset of which you listed
the contents in the previous section.
Instructions
Use the command:
rucio list-dataset-replicas data15_13TeV:data15_13TeV.00276329.physics_Main.merge.AOD.f620_m1480
Note that your results may vary from those shown below, depending on when the command was run.
DATASET: data15_13TeV:data15_13TeV.00276329.physics_Main.merge.AOD.f620_m1480
+--------------------------+---------+---------+
| RSE | FOUND | TOTAL |
|--------------------------+---------+---------|
| AUSTRALIA-ATLAS_DATADISK | 1474 | 1474 |
| CERN-PROD_DERIVED | 1474 | 1474 |
+--------------------------+---------+---------+