postgresql开启归档日志
步骤一:修改postgresql的配置文件(postgresql.conf)
wal_level=hot_standby
archive_mode =on
archive_command ='DATE=`date +%Y%m%d`;DIR="/home/postgres/arch/$DATE";(test -d $DIR || mkdir -p $DIR)&& cp %p $DIR/%f'
ps:%p 是指相对路径 %f是指文件名
步骤二:创建归档路径
mkdir -p /home/postgres/arch
chown -R postgres:postgres /home/postgres/arch
步骤三:重启数据库
步骤四:验证归档是否正常
postgres=# checkpoint;
CHECKPOINT
postgres=# select pg_switch_xlog();
pg_switch_xlog
----------------
1/760000E8
(1 row)
postgres@ubuntu:~$ cd /home/postgres/data/data_1999/arch/
postgres@ubuntu:~/data/data_1999/arch$ ls
20150603
postgres@ubuntu:~/data/data_1999/arch$ cd 20150603/
postgres@ubuntu:~/data/data_1999/arch/20150603$ ls
000000010000000100000074 000000010000000100000075 000000010000000100000076