postgres 9.6 replication

1. How replication works in PostgreSQL?
2. How many types of replication are there in PostgreSQL?
3. How install and configure PostgreSQL replication?
4. What is replication slots in Postgres?
5. Does Postgres have replication?
6. Can Postgres scale horizontally?
7. How many types of replication are there?
8. What are the types of replication?
9. What is PgBouncer in PostgreSQL?
10. How do you do logical replication in PostgreSQL?
11. How do I cluster a Postgres database?
12. How do I migrate a Postgres database to another server?

How replication works in PostgreSQL?

Understanding replication in PostgreSQL

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.

How many types of replication are there in PostgreSQL?

PostgreSQL comes with three different replication methods. As with so many things, each replication method has its pros and cons.

How install and configure PostgreSQL replication?

How to Install and Configure PostgreSQL Replication with Hot Standby on Ubuntu 15.04

1. Step 1 - Setup the Hostname.
2. Step 2 - Install PostgreSQL on Master and Slave Server.
3. Step 3 - Configure Master-server.
4. Step 4 - Slave-server Configuration.
5. Step 5 - Syncronize Data from Master server to Slave server.
6. Step 6 - Testing.

What is replication slots in Postgres?

What are replication slots? Streaming replication slots are a new facility introduced in PostgreSQL 9.4. They are a persistent record of the state of a replica that is kept on the master server even when the replica is offline and disconnected.

Does Postgres have 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.

Can Postgres scale horizontally?

For Horizontal Scaling, we can add more database nodes as slave nodes. It can help us to improve the read performance balancing the traffic between the nodes. In this case, we'll need to add a load balancer to distribute traffic to the correct node depending on the policy and the node state.

How many types of replication are there?

There are four MS SQL Server replication types: snapshot replication, transactional replication, peer-to-peer replication and merge replication.

What are the types of replication?

Types of data replication

• Full table replication.
• Transactional replication.
• Snapshot replication.
• Merge replication.
• Key-based incremental replication.

What is PgBouncer in PostgreSQL?

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 do you do logical replication in PostgreSQL?

PostgreSQL Logical Replication Process

1. Step 1: A snapshot of the publishing database is copied to the subscriber. ...
2. Step 2: After the copy is completed, subsequent changes made in the publisher node will be sent to the subscriber node. ...
3. /etc/postgresql/version/main. ...
4. C:Program FilesPostgreSQLversiondata. ...
5. wal_level = logical.

How do I cluster a Postgres database?

17.2. Creating a Database Cluster

1. In file system terms, a database cluster is a single directory under which all data will be stored. ...
2. Note that you must execute this command while logged into the PostgreSQL user account, which is described in the previous section.

How do I migrate a Postgres database to another server?

How to copy a PostgreSQL database to another server?

1. Using pg_dump command. pg_dump -C -h localhost -U localuser dbname | psql -h remotehost -U remoteuser dbname. ...
2. With TablePlus. In TablePlus, you can copy a database to another server using the Backup and Restore feature.
3. Backup Data. ...
4. Restore Data.