Pg_dumpall example

PostgreSQL databases of a cluster into one script file. The script file contains SQL commands that can be used as input to psql to restore the databases. It does this by calling pg _dump for each database in a cluster.

Backing up databases is one of the most critical tasks in database administration. When used properly pg _dump will create a portable and highly customizable backup file that can be used to restore all or part of a single database. While not usually necessary, it can be a handy trick to know for exceptions such as the pg _ dumpall script.

Example 9-uses this technique to create one dump file for all databases. If you (as user1) do not have permission to create files in the current directory, then first use the cd command to change to a directory where you do have permission. You can use the pwd command to see what the current directory actually is.

How to pass in password to pg_dump? Hi, I am new to this postgreSQL, currently I am doing the back up and purging the data from one GP server to another new GP server. For offloading the data we are using the pg _dump utitlity pg _dump -t schema. In this blog post, we look at the option for upgrading a postgres database using pg _ dumpall. CREATE TABLE, ALTER TABLE, and COPY SQL statements of source database.

To restore these dumps psql command is enough. Keep in mind pg _dump and pg _ dumpall are version specific meaning do not use pg _dump from 9. Besides psqltool, you can use pg _restore program to restore databases backed up by the pg _dump or pg _dumpalltools. With pg _restore program, you have various options for restoration databases, for example : The pg _restore allows you to perform parallel restores using the -j option to specify the number of threads for restoration. If you need to include global objects (like uses and tablespaces) or dump multiple databases, use pg_dumpall instead.

The output generated by pg_dump is not a traditional “backup”. It omits some information that makes it unusable for some operations, like for example initializing a standby server. It backs up each database in a given cluster, and also preserves cluster-wide data such as role and tablespace definitions.

This article will describe various ways to use of pg _dump command to backup database. Also you will learn how to restore datbase backup. A simple way to achieve this is to configure cron or another external daemon to periodically connect to the database and run a command. A principal vantagem do pg_dumpall, é o backup de todo o cluster, incluindo schemas, bancos de dados, tabelas, templates, usuários e roles, assim como suas permissões. A facilidade do restore, também pode ser considerado uma vantagem, uma vez que segue o mesmo princípio do backup, que também é full.

Postgres Pro databases of a cluster into one script file. It is important to understand the scenarios under which pg _dump and pg _restore utilities will be helpful. This post is the second of our Upgrading or Migrating Your. When your database size is increasing, you should demand compressed backup for saving the disk space and time both.

Thanks for contributing an answer to Database Administrators Stack Exchange! Please be sure to answer the question. Provide details and share your research! Asking for help, clarification, or responding to other. However, the sh example is much simpler to understan and performs well in terms of memory usage.

For production use, I would steer clear of the last examples, as they tend to use a lot of memory. It creates a single (non-parallel) dump file. For routine backups of Greenplum Database it is better to use the Greenplum Database backup utility, gpcrondump, for the best performance.