Hello Jan! On Mittwoch, 31. März 2010, Jan Horák wrote: > 30.3.2010 13:55, Philipp Marek wrote: > > I looked at that, and I'd like to post two wishes: > > * Please provide representations with a SHA1 (or similar) field; > > then it's possible to split blocks on manber-borders, to save > > space. > > Thank you for respond, this is definitely a good point, I will involve it. Fine, thank you. Even if no Manber-blocks would be used at first, it would provide consistency checks. > > * Furthermore, how about allowing the plain data to reside in files? > > Would make the database much smaller, and then these data blocks > > could possibly be shared among multiple repositories. > > (Really easy, too, if they're named by their SHA1, for example). > > That should allow for zero-copy IO, too (at least for sending data). > > The question is, how much faster it would be.. I would like to make a > simple test to simulate this soon and estimate the percentage difference.. That would be very interesting to me. I just know of some similar system where bitmaps were fetched out of a database - instead of just using Apache and static paths the whole data was transferred multiple times over multiple sockets ... > Another point is a simple backup of the SQL database, using an existed > global backup system in a company, which is one of the main benefits of > the SQL backend. Would the external plain data be a problem for global > backup or not? That's a good point against that idea, yes.
Regards, Phil
