Create a cache pool. Only the superuser should be able to call this function.
Adds a directive, skipping most error checking. This should only be called
internally in special sce
Throws an exception if the CachePool does not have enough capacity to cache the
given path at the re
Resets all tracked directives and pools. Called during 2NN checkpointing to
reset FSNamesystem state
Computes the needed number of bytes and files for a path.