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PostgreSQL Replication, Second Edition

PostgreSQL Replication, Second Edition

By : Hans-Jürgen Schönig
4.5 (4)
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PostgreSQL Replication, Second Edition

PostgreSQL Replication, Second Edition

4.5 (4)
By: Hans-Jürgen Schönig

Overview of this book

This book is ideal for PostgreSQL administrators who want to set up and understand replication. By the end of the book, you will be able to make your databases more robust and secure by getting to grips with PostgreSQL replication.
Table of Contents (17 chapters)
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16
Index

Setting up replication and load balancing


To set up pgpool, we can simply take an existing sample file containing a typical configuration, copy it to our configuration directory, and modify it:

$ cp /usr/local/etc/pgpool.conf.sample /usr/local/etc/pgpool.conf

It is a lot easier to just adapt this config file than to write things from scratch. In the following listing, you will see a sample config that you can use for a simple two-node setup:

listen_addresses = '*'
port = 9999
socket_dir = '/tmp'
pcp_port = 9898
pcp_socket_dir = '/tmp'

backend_hostname0 = 'localhost'
backend_port0 = 5432
backend_weight0 = 1
backend_data_directory0 = '/home/hs/db'
backend_flag0 = 'ALLOW_TO_FAILOVER'

backend_hostname1 = 'localhost'
backend_port1 = 5433
backend_weight1 = 1
backend_data_directory1 = '/home/hs/db2'
backend_flag1 = 'ALLOW_TO_FAILOVER'

enable_pool_hba = off
pool_passwd = 'pool_passwd'
authentication_timeout = 60
ssl = off
num_init_children = 32
max_pool = 4
child_life_time = 300
child_max_connections...

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