postgresql 备份恢复(三) pg_rman

时间：2010-09-01 来源：大肚熊

pg_rman是一款专门为postgresql设计的在线备份恢复的工具。其支持在线和基于时间点备份方式，还可以通过创建backup catalog来维护DB cluster备份信息。

看起来好像是模仿oracle的RMAN工具。

pg_rman特点：

使用简单.一个命令即可完成备份和恢复.
支持在线全备,增量备份，归档备份.
支持备份压缩.通过gzip工具实现页内压缩.
自动备份维护.自动删除过期的WAL备份文件.
支持备份验证.
恢复期间无事务丢失.支持基于PITR的配置文件生成器.

pg_rman平台支持:

代码

Tested platforms:
OS     Edition     PostgreSQL     Revision     Date
Linux     Fedora 11     8.4.2     23     2009-12-18
Linux     Fedora 11     8.3.9     23     2009-12-18
Linux     Fedora 11     8.2.15     23     2009-12-18

Requirements:

    * Linux (and some of UNIXes)
    * PostgreSQL 8,2, 8.3, 8.4, and 8.5

Unsupported platforms:

    * Windows
    * PostgreSQL 8.1 or prior versions.

pg_rman命令参考：

代码

[postgre@daduxiong etc]$ pg_rman --help
pg_rman manage backup/recovery of PostgreSQL database.

Usage:
  pg_rman OPTION init
  pg_rman OPTION backup
  pg_rman OPTION restore
  pg_rman OPTION show [DATE]
  pg_rman OPTION show timeline [DATE]
  pg_rman OPTION validate [DATE]
  pg_rman OPTION delete DATE

Common Options:
  -D, --pgdata=PATH         location of the database storage area
  -A, --arclog-path=PATH    location of archive WAL storage area
  -S, --srvlog-path=PATH    location of server log storage area
  -B, --backup-path=PATH    location of the backup storage area
  -c, --check               show what would have been done

Backup options:
  -b, --backup-mode=MODE    full, incremental, or archive
  -s, --with-serverlog      also backup server log files
  -Z, --compress-data       compress data backup with zlib
  -C, --smooth-checkpoint   do smooth checkpoint before backup
  --keep-data-generations=N keep GENERATION of full data backup
  --keep-data-days=DAY      keep enough data backup to recover to DAY days age
  --keep-arclog-files=NUM   keep NUM of archived WAL
  --keep-arclog-days=DAY    keep archived WAL modified in DAY days
  --keep-srvlog-files=NUM   keep NUM of serverlogs
  --keep-srvlog-days=DAY    keep serverlog modified in DAY days

Restore options:
  --recovery-target-time    time stamp up to which recovery will proceed
  --recovery-target-xid     transaction ID up to which recovery will proceed
  --recovery-target-inclusive whether we stop just after the recovery target
  --recovery-target-timeline  recovering into a particular timeline

Catalog options:
  -a, --show-all            show deleted backup too

Connection options:
  -d, --dbname=DBNAME       database to connect
  -h, --host=HOSTNAME       database server host or socket directory
  -p, --port=PORT           database server port
  -U, --username=USERNAME   user name to connect as
  -w, --no-password         never prompt for password
  -W, --password            force password prompt

Generic options:
  -q, --quiet               don't write any messages
  --debug                   debug mode
  --help                    show this help, then exit
  --version                 output version information, then exit

Read the website for details. <http://code.google.com/p/pg-rman/>
Report bugs to <http://code.google.com/p/pg-rman/issues/list>.

pg_rman安装：

进入下载http://code.google.com/p/pg-rman/downloads/list

通过解压,然后编译即可使用。

过程非常简单。