Update of sr #135998 (project xrootd):
Assigned to: None => abh
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Follow-up Comment #2:
Hi Tommaso,
From what I understand here, the cmsd simple sits on top of your gpfs storage
which provides a union of online as well as offline files. So, from the file
system stand-point there is no way to know where the file is actually located
(disk or tape). If this is the case, we have only two options:
1) If we issue a filesystem stat() call, is there something in the returned
information that indicates whether or not the file is actually on disk? If it
does, we could make our oss plug-in sensitive to that and return file not
found.
2) If it is more complicated, then you would have to come up with a
specialized oss plugin (not very hard to do) to actually do the necessary
processing for his type of configuration.
So, how would I determine, as an application sitting on top of GPFS, whether
the file is actually on disk or not?
Andy
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