pg_dump is a utility for backing up a PostgreSQL database. 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.
pg_dump -j uses multiple database connections it connects to the database once with the master process and once again for each worker job. Without the synchronized snapshot feature, the different worker jobs wouldn’t be guaranteed to see the same data in each connection, which could lead to an inconsistent backup.
4/29/2012 · This article will show you how to use the pg_dump utility that is built-in to PostgreSQL to backup or dump the database to a file. This is a utility I use all the time to quickly make periodic backups of my databases. This tool has the ability to create both compressed and uncompressed dumps of your database.
pg_dump is a utility for dumping out a Postgres database into a script or archive file containing query commands. The script files are in text format and can be used to reconstruct the database, even on other machines and other architectures.
6/20/2018 · pg_dump can back up a running, active database without interfering with other operations (i.e.
other readers and writers). One caveat: pg_dump does not dump roles or other database objects including tablespaces, only a single database. To take backups on your entire PostgreSQL cluster, pg_dumpall is the better choice.
When used with one of the archive file formats and combined with pg_restore, pg_dump provides a flexible archival and transfer mechanism. pg_dump can be used to backup an entire database, then pg_restore can be used to examine the archive and/or.
6/10/2013 · pg_dump -Fc 11m12.443s 4.6G 34m27.218s pg_dump -Z6 -Fc 11m18.154s 4.6G 35m54.344s gzip (and many other zlib-using programs) simply default to compression level six.
pg_dump compress option has the following description: Specify the compression level to use. Zero means no compression. For the custom archive format, this specifies compression of individual table-data segments, and the default is to compress at a moderate level. For plain text output, setting a nonzero compression level causes the entire output …
7/28/2019 · If you need to compress the output file, you must use the – Z option: pg_dump -Z6 database_name > database.gz. This command causes the entire output file to be compressed as though it had been fed through gzip with a compression level equal to 6 (it can vary from 0 to 6).
