Backup Restore from other node after switchover/failover
Hi,
haven't tested it yet but maybe I can get a quick answer here.
We have discussed the following scenario.
Few nodes as streaming replication cluster all in sync with taking backup
only from one dedicated node. Now that node which is responsible for the backups
goes down. For sure I have a full backup taken from that crashed node
some time ago but now this node is gone and I have to take care for a
restore for some reason.
Am I able to make a full restore with that last backup from the offline node
to any other still existing node with Recovering the archived WAL from the new
selected node if I have activated archive_mode as "always"?
Or is it strictly necessary to create a new full backup from the new node
which is responsible for the backups after the failover or maybe after a
Switchover, too?
Thanks and best regards
Dirk
Hi Dirk,
Yes, this will work fine. You can use the existing backup to restore it on
the new node and use the WAL archives from new node for the recovery
purpose. As a best practice, I would suggest setting the parameter
"recovery_target_timeline=latest" in your recovery command to ensure the
recovery happens along the latest timeline.
Regards
Sushant
On Wed, Oct 28, 2020 at 2:53 PM Dirk Krautschick <
Dirk.Krautschick@trivadis.com> wrote:
Show quoted text
Hi,
haven’t tested it yet but maybe I can get a quick answer here.
We have discussed the following scenario.
Few nodes as streaming replication cluster all in sync with taking backup
only from one dedicated node. Now that node which is responsible for the
backupsgoes down. For sure I have a full backup taken from that crashed node
some time ago but now this node is gone and I have to take care for a
restore for some reason.
Am I able to make a full restore with that last backup from the offline
nodeto any other still existing node with Recovering the archived WAL from the
newselected node if I have activated archive_mode as “always”?
Or is it strictly necessary to create a new full backup from the new node
which is responsible for the backups after the failover or maybe after a
Switchover, too?
Thanks and best regards
Dirk