On 13.07.2017 21:57, Philip Martin wrote: > Branko Čibej <br...@apache.org> writes: > >> Agreed. That's why I didn't propose this. I proposed spawning off a >> daemon that would post-process _one_ commit and exit. It could do all >> sorts of analysis of the content and finding the best (for some >> definition of "best") source for the delta, etc. > One difficulty is the that FSFS makes the assumption that revision files > are immutable. The pack operation can get around this as it deletes the > immutable revision files and adds distinct immutable pack files. > > A separate deltification operation would probably need to do something > similar, introduce a second form of revision file distinguished by name > or path. Commit would write immutable pre-delta revision files and > deltification would write immutable post-delta revision files before > deleting the pre-delta file. All the FSFS code would have to fall over > from pre-delta revision file to post-delta revision file much like it > falls over from revision file to pack file.
Agreed on all points. Whether this actually forces a format bump or not is a different question which I don't know the answer to. -- Brane
