On 5.10.16 10:14 , Julian Sedding wrote:
Would it be possible to improve the heuristic without traversing the node tree? I.e. do the segment tar files contain sufficient information in their indexes to safely determine that some binary references are dead? I'm looking for no false positives but possibly many false negatives.
Oak Segment Tar now has an index of binaries in the tar files. See OAK-4201. This avoids having to traverse for reachability.
It suffers the same issue though: DSGC is only effective after a revision gc. Since Oak Segment Tar implements a retention time based revision gc model, this will also affect the DSCG. I agree this should be better documents and I hope to do so once Oak Segment Tar is sufficiently stabilised. See OAK-4292. Patches are always welcome though ;-)
Michael
