How To Install pgpool2 on Ubuntu 22.04
Introduction
In this tutorial we learn how to install pgpool2 on Ubuntu 22.04.
What is pgpool2
pgpool2 is:
pgpool-II is a middleware that works between PostgreSQL servers and a PostgreSQL database client. It provides the following features:
- Connection Pooling
- Replication
- Load Balance
- Limiting Exceeding Connections
- Parallel Query
pgpool-II talks PostgreSQL’s backend and frontend protocol, and relays a connection between them. Therefore, a database application (frontend) thinks that pgpool-II is the actual PostgreSQL server, and the server (backend) sees pgpool-II as one of its clients. Because pgpool-II is transparent to both the server and the client, an existing database application can be used with pgpool-II almost without a change to its sources.
This is version 3 of pgpool-II, the second generation of pgpool.
There are three methods to install pgpool2 on Ubuntu 22.04. We can use apt-get, apt and aptitude. In the following sections we will describe each method. You can choose one of them.
Install pgpool2 Using apt-get
Update apt database with apt-get using the following command.
sudo apt-get update
After updating apt database, We can install pgpool2 using apt-get by running the following command:
sudo apt-get -y install pgpool2
Install pgpool2 Using apt
Update apt database with apt using the following command.
sudo apt update
After updating apt database, We can install pgpool2 using apt by running the following command:
sudo apt -y install pgpool2
Install pgpool2 Using aptitude
If you want to follow this method, you might need to install aptitude first since aptitude is usually not installed by default on Ubuntu. Update apt database with aptitude using the following command.
sudo aptitude update
After updating apt database, We can install pgpool2 using aptitude by running the following command:
sudo aptitude -y install pgpool2
How To Uninstall pgpool2 on Ubuntu 22.04
To uninstall only the pgpool2 package we can use the following command:
sudo apt-get remove pgpool2
Uninstall pgpool2 And Its Dependencies
To uninstall pgpool2 and its dependencies that are no longer needed by Ubuntu 22.04, we can use the command below:
sudo apt-get -y autoremove pgpool2
Remove pgpool2 Configurations and Data
To remove pgpool2 configuration and data from Ubuntu 22.04 we can use the following command:
sudo apt-get -y purge pgpool2
Remove pgpool2 configuration, data, and all of its dependencies
We can use the following command to remove pgpool2 configurations, data and all of its dependencies, we can use the following command:
sudo apt-get -y autoremove --purge pgpool2
References
Summary
In this tutorial we learn how to install pgpool2 package on Ubuntu 22.04 using different package management tools: apt, apt-get and aptitude.
