On Feb 4, 2009, at 5:12 PM, Brown, Daniel wrote: > Good Afternoon List, > > I've been looking at how best to save/load SQLite database that is > 100% > in memory to and from a memory buffer instead of a file via a VFS > operating system wrapper. I had initially thought that implementing a > Virtual File System (VFS) was a solution but then I realised that > would > double my memory usage. As I would be holding the pages internally in > the VFS and SQLite would also be holding duplicates internally in its > page system, as well as another partial set of duplicates in the > SQLite > page cache. > > After thinking about this for a bit, a more efficient implementation > could be to save or load the database pages held in SQLite's internal > page system. This would effectively involve two new functions being > added to the SQLite API: one to seed the page system with pages > contained in a supplied buffer (load) and another to copy pages out of > the page system and into a buffer (save). > > I've had a look through the O'Reilly eBook "Inside SQLite" and through > the SQLite source code and I think this solution is possible. I would > like to know if this approach seems a reasonable solution or not? I > would also appreciate any advice about safely modifying the page > system > that anyone would be able to share. >
http://www.sqlite.org/draft/c3ref/backup_finish.html D. Richard Hipp d...@hwaci.com _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
