使用GZIP进行备份和恢复

对于较大的数据库，这是非常好的

备份

pg_dump -U user -d mydb | gzip > mydb.pgsql.gz

恢复

gunzip -c mydb.pgsql.gz | psql dbname -U user

https://www.postgresql.org/docs/14/backup-dump.html

创建备份

pg_dump -h localhost -p 5432 -U postgres -F c -b -v -f 
"/usr/local/backup/10.70.0.61.backup" old_db

-F c是自定义格式(压缩后，可以与-j N并行)-b是包含blobs， -v是verbose， -F是备份文件名。

从备份恢复

pg_restore -h localhost -p 5432 -U postgres -d old_db -v 
"/usr/local/backup/10.70.0.61.backup"

设置-h localhost - option很重要

试试下面的命令是否能帮到你:

sudo su - yourdbuser
psql
\i yourbackupfile

遵循以下3个步骤:

启动postgresql server - sudo systemctl Start postgresql 启用same - sudo systemctl Enable postgresql restore命令- pg_restore -h localhost -p 5432 - u postgres -d old_db . sh

假设转储文件在同一目录中

链接:

https://www.postgresqltutorial.com/postgresql-restore-database https://askubuntu.com/questions/50621/cannot-connect-to-postgresql-on-port-5432

根据创建转储文件的方式，有两个工具可供参考。

您的第一个引用源应该是手册页pg_dump，因为它创建了转储本身。它说:

Dumps can be output in script or archive file formats. 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(1). Script files can be used to reconstruct the database even on other machines and other architectures; with some modifications even on other SQL database products. The alternative archive file formats must be used with pg_restore(1) to rebuild the database. They allow pg_restore to be selective about what is restored, or even to reorder the items prior to being restored. The archive file formats are designed to be portable across architectures.

所以这取决于它被倾倒的方式。如果使用Linux/Unix，您可能可以使用excellent file(1)命令来找出它-如果它提到ASCII文本和/或SQL，它应该用psql恢复，否则您可能应该使用pg_restore。

恢复非常简单:

psql -U username -d dbname < filename.sql

-- For Postgres versions 9.0 or earlier
psql -U username -d dbname -1 -f filename.sql

or

pg_restore -U username -d dbname -1 filename.dump

查看它们各自的手册页-有相当多的选项会影响恢复的工作方式。在恢复之前，您可能必须清除“活动”数据库或从template0重新创建它们(正如评论中指出的那样)，这取决于转储是如何生成的。

恢复转储文件

psql -d [Dbname] -U [UserName] -p 5432 < [FileLocation]

恢复一个.SQL文件

pg_restore -U [Username] -d [Dbname] -1 [FileLocation]

如果出现用户身份验证错误，请转到程序文件PSQL/data文件夹中的pg_hba.conf文件，并将“METHOD”更改为“Trust”。 重新启动windows服务中的psql serive (Win + R—> services.msc)。