Postgres在线备份步骤

Postgres在线备份步骤：

1.在线备份数据库：

[postgres@localhost~]$ vi .bash_profile

exportPGDATA=$HOME/pgdata

export BACKBASE=/home/postgres/wmpay_bak

exportARCHIVE=/home/postgres/wmpay_archive_log

[postgres@localhost~]$ psql -d wmpay -c "select PG_START_BACKUP('backup baseline')"

pg_start_backup

-----------------

0/4C51EC

(1 row)



[postgres@localhostwmpay_archive_log]$ cp -R $PGDATA/* $BACKBASE



[postgres@localhostwmpay_archive_log]$ psql -d wmpay -c "select PG_STOP_BACKUP()"

pg_stop_backup

----------------

0/4C5248

(1 row)

######################################################################################

#[postgres@localhost~]$ cd wmpay_archive_log/

#[postgres@localhostwmpay_archive_log]$ ls

#000000010000000000000000 000000010000000000000002

#000000010000000000000000.004C51EC.backup archive_status

#000000010000000000000001

#[postgres@localhostwmpay_archive_log]$ more 000000010000000000000000.004C51EC.backup

#START WAL LOCATION:0/4C51EC (file 000000010000000000000000)

#STOP WAL LOCATION:0/4C5248 (file 000000010000000000000000)

#CHECKPOINTLOCATION: 0/4C51EC

#START TIME:2013-05-11 00:01:31 CST

#LABEL: backupbaseline

#STOP TIME:2013-05-11 00:19:37 CST

######################################################################################

2.备份在线日志：

cp -R$PGDATA/pg_xlog/* $ARCHIVE