Brandon Williams <bmwill@xxxxxxxxxx> writes: > On 03/26, Jeff Hostetler wrote: [...] >> All of these cases could be eliminated if the type/size were available >> in the OID. >> >> Just a thought. While we are converting to a new hash it seems like >> this would be a good time to at least discuss it. > > Echoing what Stefan said. I don't think its a good idea to embed this > sort of data into the OID. There are a lot of reasons but one of them > being that would block having access to this data behind completing the > hash transition (which could very well still be years away from > completing). > > I think that a much better approach would be to create a meta-data data > structure, much like the commit graph that stolee has been working on) > which can store this data along side the objects (but not in the > packfiles themselves). It could be a stacking structure which is > periodically coalesced and we could add in a wire feature to fetch this > meta data from the server upon fetching objects. Well, the type of the object is available, from what I remember, in the bitmap file for a packfile (if one does enable creaating them). There are four compressed bit vectors, one for each type, with bit set to 1 on i-th place if i-th object in packfile is of given type. Just FYI. -- Jakub Narębski
