| repmgr 4.2 Documentation | |||
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repmgr is a suite of open-source tools to manage replication and failover within a cluster of PostgreSQL servers. It supports and enhances PostgreSQL's built-in streaming replication, which provides a single read/write primary server and one or more read-only standbys containing near-real time copies of the primary server's database. It provides two main tools:
A command-line tool used to perform administrative tasks such as:
setting up standby servers
promoting a standby server to primary
switching over primary and standby servers
displaying the status of servers in the replication cluster
A daemon which actively monitors servers in a replication cluster and performs the following tasks:
monitoring and recording replication performance
performing failover by detecting failure of the primary and promoting the most suitable standby server
provide notifications about events in the cluster to a user-defined script which can perform tasks such as sending alerts by email