1：开源产品 pg_rman

特点：支持在线备份和任意时间点恢复功能，即如果备份做好了，可以恢复到任意故障点

详细情况：

pg_rman --help

2：全备

To take an online backup, use the  backup  command:

$ pg_rman backup --backup-mode=full --with-serverlog

3：查看备份情况

To list all the backups taken so far, use the  show  command:

$ pg_rman show

4：恢复

To restore from a backup, use the  restore  command. Note that pg_rman itself generates the  recovery.conf  file required to perform PostgreSQL PITR.

$ pg_ctl stop -m immediate
$ pg_rman restore
$ cat $PGDATA/recovery.conf
# recovery.conf generated by pg_rman 1.3.7
restore_command = 'cp /home/postgres/arclog/%f %p'
recovery_target_timeline = '1'
$ pg_ctl start

99： 再次强调备份有效性校验

必须定期做，往往问题出现的时候都是一堆问题