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What is a Postgres dump?
pg_dump is a utility for backing up a PostgreSQL database. Script dumps are plain-text files containing the SQL commands required to reconstruct the database to the state it was in at the time it was saved. To restore from such a script, feed it to psql.
Does pg_dump lock DB?
pg_dump doesn’t lock the entire database, it does get an explicit lock on all the tables it is going to dump, though.
What is a SQL dump?
A database dump (also: SQL dump) contains a record of the table structure and/or the data from a database and is usually in the form of a list of SQL statements. A database dump is most often used for backing up a database so that its contents can be restored in the event of data loss.
What is Pgdmp?
pgdmp is a custom format file. Note that the custom format file is gzip-compressed and it is not required to compress it again. The PostgreSQL docs have more info about all the options for pg_dump and pg_dumpall.
What’s the difference between PG dump and PG dumpall?
It makes consistent backups even if the database is being used concurrently. pg_dump does not block other users accessing the database (readers or writers). pg_dump only dumps a single database. To back up an entire cluster, or to back up global objects that are common to all databases in a cluster (such as roles and tablespaces), use pg_dumpall.
How to get a PG _ dump-s to include the create database?
Begin the output with a command to create the database itself and reconnect to the created database. (With a script of this form, it doesn’t matter which database in the destination installation you connect to before running the script.) If –clean is also specified, the script drops and recreates the target database before reconnecting to it.
What causes PG _ dump to fail in PostgreSQL?
pg_dump will open njobs + 1 connections to the database, so make sure your max_connections setting is high enough to accommodate all connections. Requesting exclusive locks on database objects while running a parallel dump could cause the dump to fail.
Can you force PG _ dump to prompt for password?
Force pg_dump to prompt for a password before connecting to a database. This option is never essential, since pg_dump will automatically prompt for a password if the server demands password authentication. However, pg_dump will waste a connection attempt finding out that the