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Solved by mikel_martin. Go to Solution.
The Vault never does delta file storage for any file types.
The reasoning behind this is that we have found in our testing there was not a significant gain in doing so, however there was a significant performance slowdown when trying to calculate the delta between two versions.
That said, technology changes and we may find at some point in the future it does provide enough benefit and re-evaluate.
What we do to reduce file storage issue is;
1. If you checkout a file and then check it back in, if not actual changes has occurred to the file we perform and undo checkout and do not re-upload the file.
2. If two versions in the Vault have the same file bits (meta-data change only) we do not make a new copy of the file in the file store.
The purge system will is the supported method for removing files from the file store. Purge can be ran in batch via the ADMS and can be scripted via the command line.