If you probably did start out the new cluster, it's got composed to shared documents and it truly is unsafe to utilize the outdated cluster. The outdated cluster will need to be restored from backup In this instance.
If you are attempting to automate the up grade of numerous clusters, you should notice that clusters with identical database schemas call for a similar publish-update measures for all cluster updates; this is because the article-upgrade steps are dependant on the databases schemas, and not consumer data.
Web end postgresql-16 Streaming replication and log-delivery standby servers should be jogging all through this shutdown in order that they receive all improvements.
If you employ website link method, the update might be considerably quicker (no file copying) and use considerably less disk House, but you will not have the capacity to more info entry your previous cluster as soon as You begin The brand new cluster after the improve. connection mode also demands that the aged and new cluster facts directories be in the same file process.
use hyperlink manner, do not need or will not want to use rsync, or want A neater Resolution, skip the instructions On this section and simply recreate the standby servers the moment pg_upgrade completes and the new Main is functioning.
even though rsync need to be operate on the main for at minimum a single standby, it is possible to operate rsync on an upgraded standby to up grade other standbys, so long as the upgraded standby hasn't been started out.
If the condition is actually a contrib module, you may perhaps really need to uninstall the contrib module from the outdated cluster and set up it in the new cluster after the improve, assuming the module will not be getting used to retail outlet consumer details.
You need to use the same port selection for each clusters when doing an update since the outdated and new clusters won't be functioning simultaneously. even so, when examining an old operating server, the aged and new port quantities need to be various.
this selection can significantly reduce the time and energy to up grade a multi-database server functioning with a multiprocessor device.
What this does will be to record the back links created by pg_upgrade's hyperlink manner that connect files while in the outdated and new clusters on the main server. It then finds matching files within the standby's aged cluster and results in links for them during the standby's new cluster.
the old and new cluster directories around the standby. The Listing framework underneath the required directories on the key and standbys ought to match. check with the rsync guide web site for specifics on specifying the distant directory, e.g.,
If you are upgrading standby servers applying techniques outlined in portion action eleven, confirm which the old standby servers are caught up by functioning pg_controldata from the old primary and standby clusters.
For resource installs, if you want to set up the new server inside a personalized spot, make use of the prefix variable:
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the new PostgreSQL executable directory; default will be the Listing where by pg_upgrade resides; surroundings variable PGBINNEW