What Does pgauto Mean?
What Does pgauto Mean?
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pg_auto_failover depends about the creation of the watch provider that manages a single or a number of HA formations. A development can consist of a bunch of two or even more Postgres nodes.
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But Let's say we lost the two of our standby nodes? Nicely, that could prevent our HA program to work properly. If the two standbys are missing, many of you will require Postgres to simply accept writes, and some of you will want Postgres to refuse writes simply because you can’t settle for the risk that comes with preserving one duplicate of your manufacturing knowledge.
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Increase the new Major node into the HA formation. Login to the new Principal host, and execute pg_autoctl build postgres just like:
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Login for the secondary node, which won't include any database documents and is not initialized, and insert it to the HA formation, just like:
Fault tolerance is particularly wanted in higher-availability or lifetime-vital units. The power of protecting performance when parts of a process break down is called graceful degradation.
In this context “information safety” implies that after the standby node happens to be unavailable, one duplicate of the data is managed, on an individual device. The degradation applied by pg_auto_failover in that situation is graceful pgautoz in terms of the assistance: writes are permitted to be processed yet again.
Our pg_auto_failover documentation contain developer commands for pg_autoctl with the next easter egg. You'll be able to setup a tmux session that operates a Key and two secondary Postgres nodes with just one pg_autoctl developer command:
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