On 2013-06-01 17:05:57 +0900, Michael Paquier wrote: > On Sat, Jun 1, 2013 at 4:55 AM, Alvaro Herrera > <alvhe...@2ndquadrant.com>wrote: > > > Heikki Linnakangas wrote: > > > > > The manual says: > > > >pg_is_in_backup() bool True if an on-line exclusive backup is > > still in progress. > > > > > > So clearly that is intentional. That could use some rephrasing, > > > though; a layman won't know what an "exclusive backup" is. > > > > Heck, I don't understand what it is either. > > > Same here. Does it mean taking a backup not with pg_basebackup but by > executing yourself external operations between pg_start/stop_backup calls?
Basically yes. pg_start/stop_backup places the backup label into the data directory itself so there can only be one of them at a time since it has to have a fixed name. With the streaming protocol the backup label is only added to the streamed data, so there can be multiple ones at the same time. Greetings, Andres Freund -- Andres Freund http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Training & Services -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
