Enable dataset cache requests based source bag #111
Merged
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The cache management API allows an admin to request either specific data files or whole data sets to be cached. This proved limiting when caching very large datasets if any large part of the caching failed, the only practical remedy was to try caching the whole dataset again. This PR addresses this limitation by allowing one to request caching of all files from a particular bag. This provides more granularity in a request but which is more efficient than requesting individual files.
This change was implemented in support of mds2-2775, dataset of 10^4 files.