July 2005
Intermediate to advanced
1032 pages
27h 10m
English
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Managing Databases
PostgreSQL stores data in a collection of operating system files. At the highest level of organization, you find a cluster. A cluster is a collection of databases (which, in turn, is a collection of schemas).
Creating a New Cluster
You create a new cluster using the initdb program. Note that initdb is an external program, not a command that you would execute in a PostgreSQL client.
When you run initdb, you are creating the data files that define a cluster. The most important command-line argument to initdb is —pgdata= cluster-location[4]. The —pgdata argument tells initdb the name of the directory that should contain the new cluster. For example, if you execute the command
[4] There are actually three ways to specify the cluster ...
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