配置环境: 主机名 IP地址 角色 数据目录 pg 186.168.100.14 主库 /Postgresql/9.6.1/datan pghs 186.168.100.24 standby /Postgresql/9.6.1/datahs 主数据库的配置: 允许主库接受流复制的连接pg_hba.conf中: host replication postgres 186.168.100.0/24 trust postgresql.conf设置: listen_addresses = '*' max_wal_senders = 5 wal_level = hot_standby 重启数据库 standby上的操作: 在备库生成基础备份: [postgres@pghs data]$ pg_basebackup -h 186.168.100.14 -U postgres -F p -P -x -R -D /Postgresql/9.6.1/datahs -l postgresbackup20170209 45089/45089 kB (100%),2/2 tablespaces 那么在/Postgresql/9.6.1/datahs 路径下就看到了拷贝过来的文件等,因为使用了-R,所以有recovery.conf文件,内容:、 standby_mode = 'on' primary_conninfo = 'user=postgres host=186.168.100.14 port=5432 sslmode=disable sslcompression=1' 在启动standby数据库之前,需要修改postgresql.conf文件: hot_standby = on 启动standby: [postgres@pghs datahs]$ pg_ctl start -D /Postgresql/9.6.1/datahs/ server starting [postgres@pghs datahs]$ FATAL: data directory "/Postgresql/9.6.1/datahs" has group or world access DETAIL: Permissions should be u=rwx (0700). [postgres@pghs 9.6.1]$ chmod 700 datahs/ [postgres@pghs 9.6.1]$ LOG: redirecting log output to logging collector process HINT: Future log output will appear in directory "pg_log". 在主库建一个表,然后插入几条数据: postgres=# create table testhsb(id int,name varchar(10)); CREATE TABLE postgres=# insert into testhsb values (1,'test'); INSERT 0 1 备库查询: postgres=# select * from testhsb; id | name ----+------ 1 | test (1 row) 操作马上就同步了 在备库尝试修改: postgres=# delete from testhsb where id=1; ERROR: cannot execute DELETE in a read-only transaction