On Sunday 12 September 2010 00:43:19 Bruce Momjian wrote: > Gabe Nell wrote: > > > That section has been removed from the current 9.0 docs because we are > > > unsure it works. > > > > Hmm. So the only way to make a consistent backup from a standby server > > is to shut down the standby first? Or is even that problematic? > > > > Would it change anything if we are able to guarantee that the > > filesystem is snapshotted as a point-in-time snapshot by using LVM or > > on Amazon EC2 by snapshotting an EBS volume? > > I believe a snapshot of the standby is fine even if it is running, just > like on the master.
How can you ensure the snapshot is in a consistent state if the server is running? If a snapshot is taken between 2 updates in a single transaction, only half of this transaction is included in the snapshot. I would never take an LVM (or similar) snapshot of an application that can't be paused in a way to provide a consistent filesystem. -- Joost -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
