Contents
When to use PG base backup in PostgreSQL?
These are taken without affecting other clients to the database, and can be used both for point-in-time recovery (see Section 24.3) and as the starting point for a log shipping or streaming replication standby servers (see Section 25.2 ).
Why does PG _ basebackup not switch to a new Wal file?
The backup history file is not created in the database cluster backed up. pg_basebackup cannot force the standby to switch to a new WAL file at the end of backup. When you are using -X none, if write activity on the primary is low, pg_basebackup may need to wait a long time for the last WAL file required for the backup to be switched and archived.
Which is the target directory for PG basebackup?
Sets the target directory to write the output to. pg_basebackup will create this directory (and any missing parent directories) if it does not exist. If it already exists, it must be empty. When the backup is in tar format, the target directory may be specified as – (dash), causing the tar file to be written to stdout.
What does recovery.conf file do in PG _ basebackup?
The recovery.conf file will record the connection settings and, if specified, the replication slot that pg_basebackup is using, so that the streaming replication will use the same settings later on. This option can only be used together with -X stream. It causes the WAL streaming to use the specified replication slot.
pg_basebackup is used to take a base backup of a running PostgreSQL database cluster. The backup is taken without affecting other clients of the database, and can be used both for point-in-time recovery (see Section 25.3) and as the starting point for a log-shipping or streaming-replication standby server (see Section 26.2).
What is the default timeout for PostgreSQL replication?
This is useful for the sending server to detect a standby crash or network outage. If this value is specified without units, it is taken as milliseconds. The default value is 60 seconds. A value of zero disables the timeout mechanism.
How does streaming replication in PostgreSQL work?
Streaming replication in PostgreSQL works on log shipping. Every transaction in postgres is written to a transaction log called WAL (write-ahead log) to achieve durability. A slave uses these WAL segments to continuously replicate changes from its master.