On Tue, Apr 13, 2010 at 3:46 AM, Simon Slavin <slav...@bigfraud.org> wrote:
> > Does SQLite actually use byte-range locking ? I thought it always locked > the entire file. > > Simon, I think it's about the way sqlite implements different locks, a quote from os.h ** A SHARED_LOCK is obtained by locking a single randomly-chosen ** byte out of a specific range of bytes. ... ** An EXCLUSIVE_LOCK is obtained by locking all bytes in the range. ** There can only be one writer. A RESERVED_LOCK is obtained by locking ** a single byte of the file that is designated as the reserved lock byte. ** A PENDING_LOCK is obtained by locking a designated byte different from ** the RESERVED_LOCK byte. It was a note about windows, but there's also a phrase "The same locking strategy and byte ranges are used for Unix." Max Vlasov, maxerist.net _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
