I recently did some auditing and clean-up on the datastream checksums in our repository, and I found large numbers of RDF and XML datastream versions which Fedora reports to be invalid (I'm using the compare datastream checksum API method). Based on the dates, it looks like the invalid checksums were all generated by previous versions of Fedora-- the last of the invalid checksums are from just before we migrated to Fedora 3.4.2, which is what we're currently running.
Besides the obvious problems of having invalid checksums in our repository (so many potentially inaccurate invalid checksums makes it harder to identify truly invalid checksums), this also means we get errors when we try to import and export content from one Fedora instance to another or copy these objects between Fedora instances with fedora-cloudsync. For objects with versioned XML and RDF datastreams, even if the current version of the datastream is valid, if there are older versions with invalid checksums, import fails. I'm curious if anyone else has run into this problem? Also, I'm *very* interested in any suggestions or ideas about how to go about cleaning up these invalid checksums. It looks like my problem might be partially related to this: https://jira.duraspace.org/browse/FCREPO-190 - but that doesn't really help with cleaning up the existing problem (and I'm seeing invalid checksums on both managed and inline xml datastreams, so it may not be the whole picture-- although many of the managed datastreams may have been migrated from inline to managed in one of our upgrades, so it could be related). Thanks in advance for any advice. -- Rebecca Sutton Koeser, Ph.D. rebecca.s.koe...@emory.edu Digital Programs & Systems - Woodruff Library, Emory University
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