On Thu, Aug 18, 2005 at 11:01:27PM -0400, Bruce Momjian wrote: > Enzo D'addario wrote: > > 2.What happens with any DB inserts, updates, deletes etc that occur > > between the SELECT pg_start_backup() and the end of the tar? > > They would be already logged in the WAL files and already applied in the > > tarball, do they then get duplicated during log replay in the recover > > process? > > No, the recovery is just like crash recovery and everything comes back > clean, but you do have to recover to a time _after_ the end of the > backup. If you want to recover to a time during the backup you have to > use the previous backup and xlog files. One important detail is that the system is able to detect whether a change registered in WAL was already applied to the data files or not. So if it's already applied, it doesn't need to be applied again. -- Alvaro Herrera (<alvherre[a]alvh.no-ip.org>) "La naturaleza, tan frágil, tan expuesta a la muerte... y tan viva"
