What is slony replication?

What is slony replication?

What is Slony? Slony-I (referred to as just ‘Slony’ from here on out) is a third-party replication system for PostgreSQL that dates back to before version 8.0, making it one of the older options for replication available. It operates as a trigger-based replication method that is a ‘master to multiple slaves’ solution.

What is streaming replication in Postgres?

Streaming replication, a standard feature of PostgreSQL, allows the updated information on the primary server to be transferred to the standby server in real time, so that the databases of the primary server and standby server can be kept in sync.

What is PostgreSQL replication?

What Is PostgreSQL Replication? The process of copying data from a PostgreSQL database server to another server is called PostgreSQL Replication. The source database server is usually called the Master server, whereas the database server receiving the copied data is called the Replica server.

What is Pglogical?

pglogical is an open source PostgreSQL extension that helps customers replicate data between independent Aurora PostgreSQL databases while maintaining consistent read-write access and a mix of private and common data in each database. x or higher (compatible with PostgreSQL 10.13 or higher), and Aurora PostgreSQL 3.3.

What is Pgpool II?

pgpool-II is a middleware that works between PostgreSQL servers and a PostgreSQL database client. Connection Pooling: pgpool-II saves connections to the PostgreSQL servers, and reuse them whenever a new connection with the same properties (i.e. username, database, protocol version) comes in.

What is PG bouncer?

PgBouncer is an open-source, lightweight, single-binary connection pooler for PostgreSQL. It can pool connections to one or more databases (on possibly different servers) and serve clients over TCP and Unix domain sockets. PgBouncer maintains a pool of connections for each unique user, database pair.

How does postgres logical replication work?

Logical replication uses a publish and subscribe model with one or more subscribers subscribing to one or more publications on a publisher node. Subscribers pull data from the publications they subscribe to and may subsequently re-publish data to allow cascading replication or more complex configurations.

How do I stop postgres from replication?

2 Answers

1. on both master / slave, edit pg_hba.conf , remove: host replication replicator x.x.x.x/32 md5.
2. in master, reload config, via: select pg_reload_conf()
3. in slave’s data dir, remove file: standby.signal.

What is Pg_dirtyread?

pg_dirtyread is an extension for reading dead but unvacuumed tuples from a PostgreSQL relation. IMPORTANT: pg_dirtyread is an “option of last resort” for restoring lost data.

What is wal2json?

wal2json is an output plugin for logical decoding. It means that the plugin have access to tuples produced by INSERT and UPDATE. All of the new/old tuples are available in the JSON object. Also, there are options to include properties such as transaction timestamp, schema-qualified, data types, and transaction ids.

What is PostgreSQL Slony-I?

What is Slony? Slony-I (referred to as just ‘Slony’ from here on out) is a third-party replication system for PostgreSQL that dates back to before version 8.0, making it one of the older options for replication available. It operates as a trigger-based replication method that is a ‘master to multiple slaves’ solution.

Can Slony be used to replicate data between Postgresql clusters?

Since Slony can replicate data between PostgreSQL clusters of different versions, it can be used to set up replication between an older version as the master and a newer version as the slave. When the upgrade is to happen, simply perform a ‘switchover’, making the slave the new master, and the old master becomes the slave.

What is a Slony replication node?

Node: A specific PostgreSQL database as Slony replication node, which operates as either a master or slave for a replication set. Replication Set: A group of tables and / or sequences to be replicated.

How do I set up a Slony replication cluster?

After installation, a Slony replication cluster is set up by issuing a few commands using the ‘slonik’ binary. ‘slonik’ is a command with a simple, yet unique syntax of its own to initialize and maintain a slony cluster. It is the main interface for issuing commands to the running Slony cluster that is in charge of replication.