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Databases - Practical PostgreSQL
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Initializing the Filesystem

Before you can create a database in a database cluster, the filesystem must first be initialized. There are two ways to initialize the filesystem for use with PostgreSQL; you may either use the initdb application to create an entirely new database cluster (as was used to prepare your initial database system, in Chapter 2), or you may use the initlocation application to prepare a secondary data directory.

A database cluster represents several associated databases. A single instance of the postmaster process can only access one database cluster at a time. Alternatively, through initlocation , you can create databases that are part of an existing cluster that just happen to be stored in another data directory.

The following sections cover these two applications.

Databases - Practical PostgreSQL
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