>> For user requested replication, the fact that there are replicas would
>> still not appear in the PNFS namespace of dCache. You really need a DB
>> query to pick out _all_ of the files.
>
> I must agree with Greig as we cant just bill for space used but SHOULD
> also bill for bandwidth. Replicas are a consequence of bandwidth.
Cost modeling is quite a tricky business - a whole new sub-branch of
astrology!
So how does the dCache thing work then; do users effectively get Disk2Tape0
(at least for certain files, ignore the spaces for now) or are the replicas
temporary, for internal optimisations?
Can we infer from this that cumulative data in and/or data out should be
a metric.
-j
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