Pg_dumpall vs pg_dump

Fc for each database to get a nice compressed dump suitable for use with pg _restore. What are pg_dump and pg_dumpall? PostgreSQL databases of a cluster into one script file. It does this by calling pg _ dump for each database in a cluster. Hai, Can anyone tell me the difference and performance between pgdump and pg_basebackup if I want to backup a large database.

Secon back up each individual database using the pg _ dump program as described in the above section.

Right now, I only have one database on my postgresql server. 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. I am attempting to migrate from Postgres 9. So far I thought pg_dumpall is a good option. At a previous job, the database grew to nearly 2TB and the pg_dump took nearly hours. We’d by that point already changed the pg_dump schedule from daily to weekly and then to three times a month and then finally to semi-monthly.

How much does pg_dump compress? I wanted to compare the various pg_dump times for each level of compression. Dumping Using pg_dump and pg_dumpall.

The pg_dump utility can be used to generate a logical dump of a single database. 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. CREATE TABLE, ALTER TABLE, and COPY SQL statements of source database.

To restore these dumps psql command is enough. I cover pg_dump and pg_dumpall. SQL commands that can be used as input to psql to restore the databases.

I show you how to restore using psql or even pg_restore. I also how to detect errors and give practical tips on setting up your basic backup scheme. Keep in mind pg_dump and pg_dumpall are version specific meaning do not use pg_dump from 9. NOTES Since pg_dumpall calls pg_dump internally, some diagnostic messages will refer to pg_dump.

Once restore it is wise to run ANALYZE on each database so the optimizer has useful statistics. You can also run vacuumdb -a -z to analyze all databases. To know more about pg_dumpall , you may refer to our previous blog post. When you use pg_dump with custom format (-Fc), you must use pg_restore to restore the dump. I am aware of this post: Postgres password authentication fail.

Backup and Recovery using PITR.

Because pg_dump only creates a backup of one database at a time, it does not store information about database roles or other cluster-wide configuration. To store this information, and back up all of your databases simultaneously, you can use pg_dumpall. You may either use the same technique or connect remotely to a postgresql database (so you need to change the parameters of vacuumdb, pg_dump and pg_dumpall to define the server and credentials to connect to) and put the backups to a local disc.

Using the various options available with the pg_dump and pg_restore programs, you can control which database objects are saved in a backup file, which database objects are restored from a backup file, and how they are restored. Examples of this include whether to run pg_dump vs pg_dumpall and advanced options for specific backup use cases. Restore (pg_restore) The script assumes that the pg_dump backup example above has been run.

Therefore, the primary example should still be running and pg_dump backup should have been successfully created. Stack Exchange Network Stack Exchange network consists of 1QA communities including Stack Overflow , the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.