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FermilabdCache

​Using touch to modifiy the date stamps on files in the dCache
scratch area is not enough to update the
use date.  I think you have to open the files but we can test this,
though a test will take a while (1 month).

FermilabdCache

​There is more dCache monitoring then you can shake a stick at.

FermilabdCache

​dCache ‘mv’ gotcha – if you ’mv’ a file from one pool type to another, it will retain the behavior of the origianl pool type. Use ‘cp’ in order to change file types.

FermilabdCache

​Read/Write dCache pool files DO end up on tape. Least recently used file is deleted first (usually there is no to very little space available here)

FermilabdCache

​Scratch dCache pool files do NOT end up on tape. dCache tries to keep scratch files for at least 30 days.  Least recently used file is deleted first. No quotas.

FermilabdCache

​Persistent (analysis) dCache pool files do NOT end up on tape. These files are experiment controlled and will use pool space until explicitly deleted.  This area does fill up, we may need quotas.

FermilabdCache

​Use dCache for storing/reading big files – eventually blue arc will not be available from the worker nodes.