Обсуждение: Promotion of standby to master
I understand that it's possible to promote a "hot standby" pg server simply by creating the failover file. In a scenario where there are multiple standby servers, is it possible to point the other standby servers to the new master without creating a new base backup? When I tried to do this, I ran into the "timeline 2 of the primary does not match recovery target timeline 1". I'm just trying to figure out if that's because the procedure I followed to promote the standby was wrong or because it's just not possible. Thanks, Andy -- Andy Chambers Software Engineer (e) achambers@mcna.net (t) 954-682-0573 CONFIDENTIALITY NOTICE: This electronic mail may contain information that is privileged, confidential, and/or otherwise protected from disclosure to anyone other than its intended recipient(s). Any dissemination or use of this electronic mail or its contents by persons other than the intended recipient(s) is strictly prohibited. If you have received this communication in error, please notify the sender immediately by reply e-mail so that we may correct our internal records. Please then delete the original message. Thank you.
On Jun 29, 2012, at 12:16 PM, Andy Chambers wrote: > I understand that it's possible to promote a "hot standby" pg server > simply by creating the failover file. In a scenario where there are > multiple standby servers, is it possible to point the other standby > servers to the new master without creating a new base backup? > > When I tried to do this, I ran into the "timeline 2 of the primary > does not match recovery target timeline 1". I'm just trying to figure > out if that's because the procedure I followed to promote the standby > was wrong or because it's just not possible. On your slaves, you need to have the line: recovery_target_timeline=latest This allows the slaves to notice that a new timeline has started and move to it. The one gotcha is that you have to makesure to promote a slave which is most ahead in terms of replication; otherwise, if you promote a slave which is furtherbehind than another slave, and that could cause you grief when the lagging slave tries to replicate from the new master.