数据库及pg_rman版本
postgresql：(PostgreSQL) 12.3
pg_rman：pg_rman-1.3.9-pg12.tar.gz
编辑环境变量
$ id
uid=5432(postgres) gid=5432(postgres) groups=5432(postgres)
$ pwd
/home/postgres
$vi .bash_profile
export PATH=$PATH:$HOME/.local/bin:$HOME/bin:$PGHOME/bin
$ pg_rman init -B /data/db_backup
INFO: ARCLOG_PATH is set to ‘/data/pgsql_5432/archive/‘
INFO: SRVLOG_PATH is set to ‘/data/pgsql_5432/logs/‘
全量压缩备份
$ pg_rman backup -b full -U postgres -Z -h 127.0.0.1 -p 5432
Password for user postgres:
INFO: copying database files
INFO: copying archived WAL files
INFO: backup complete
INFO: Please execute ‘pg_rman validate‘ to verify the files are correctly copied.
增量压缩备份
pg_rman backup -b incremental -U postgres -Z -h 127.0.0.1 -p 5432
查看备份
pg_rman show
备份校验(每次备份完，必须要做一次校验，否则备份集不可用来恢复，增量备份时也不会用它来做增量比较)
pg_rman validate
还原备份
pg_rman restore --recovery-target-time “2020-06-11 23:00:00”;