PostgreSQL 15 : Backup and Restore2024/02/09

	For Backup and Restore PostgreSQL Data, it's possible to run with [pg_dump] and [pg_restore].
[1]	Backup Databases.

# available types for [--format=*]
#     p = plain (SQL)
#     c = custom (compression)
#     t = tar
#     d = directory

# [freebsd] user takes backup of [testdb]

freebsd@www:~ $

pg_dump -U freebsd --format=t -d testdb > pg_testdb.tar

freebsd@www:~ $

ls -l

total 5
-rw-r--r--  1 freebsd freebsd 6656 Feb  9 15:56 pg_testdb.tar

# admin user [postgres] takes backup of all databases

postgres@www:~ $

mkdir ~/backups

postgres@www:~ $

pg_dumpall -f ~/backups/pg_DB_all.sql

postgres@www:~ $

ls -l ~/backups

total 1
-rw-r--r--  1 postgres postgres 3271 Feb  9 15:57 pg_DB_all.sql

[2]	Restore Databases.

# [freebsd] user restores [testdb] database from backup file

freebsd@www:~ $

pg_restore -U freebsd -d testdb pg_testdb.tar

# admin user [postgres] restores all database from backup file
# if the type of backup file is SQL text, use [psql] command for restoring

postgres@www:~ $

psql -f ~/backups/pg_DB_all.sql

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