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+# 修改储存路径
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+
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+```shell
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+systemctl edit postgresql-13.service
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+```
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+
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+```service
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+[Service]
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+Environment=PGDATA=/home/postgresql/13/data/
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+```
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+
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+
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+
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+# 添加postgres账户环境变量
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+
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+```shell
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+vi .bash_profile
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+```
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+
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+```
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+PGDATA=/home/postgresql/13/data/
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+```
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+
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+```shell
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+vi .pgsql_profile
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+```
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+
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+```sh
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+PATH=/usr/pgsql-13/bin:$PATH
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+export PATH
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+```
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+
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+# 配置读写分离
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+
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+1. 登录postgres账户,修改主服务器配置文件：postgresql.conf
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+
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+ ```conf
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+ listen_addresses= '*'
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+ wal_level = replica
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+ archive_mode = on
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+ archive_command = 'cp %p /data/postgresql/archive/%f'
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+ max_wal_senders= 10
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+ wal_keep_size = 1000 # in megabytes; 0 disables
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+ max_slot_wal_keep_size = 10 # in megabytes; -1 disables
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+ wal_sender_timeout = 120s # in milliseconds; 0 disables
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+ hot_standby = on
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+ ```
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+
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+2. 新建用户用于主从复制
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+
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+ ```sql
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+ create user replica REPLICATION LOGIN ENCRYPTED PASSWORD 'asdf*123';
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+ ```
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+
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+3. 将主从IP添加到hba配置文件：pg_hba.conf
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+
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+ ```
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+ host replication replica 192.168.0.0/24 md5
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+ host all all 0.0.0.0/0 md5
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+ ```
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+
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+
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+4. 在从服务器新建文件夹：
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+
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+ ```shell
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+ mkdir -p /home/postgresql/13/data/
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+ ```
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+
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+5. 在从服务器执行命令在线热备份
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+
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+ ```shell
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+ pg_basebackup -h 192.168.0.10 -U replica -F p -X s -v -P -R -D $PGDATA
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+ ```
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+6. 在从服务器执行命令启动服务器
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+ ```shell
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+ pg_ctl start
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+ ```
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+7. 主服务器测试
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+ ```shell
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+ psql
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+ ```
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+ ```sql
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+ select client_addr,sync_state from pg_stat_replication;
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+ ```
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+ 查看是否有从服务器连接
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+# 备份恢复
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+
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+```shell
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+# 备份
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+pg_dumpall -h 127.0.0.1 -U postgres > /var/lib/pgsql/bakup1221.bakup
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+# 恢复服务器从备份服务器下载备份文件
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+scp postgres@192.168.0.3:"/var/lib/pgsql/bakup1221.bakup" /var/lib/pgsql/
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+# 恢复，使用postgres账号
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+psql -f bakup1221.bakup postgres
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+```
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zrufo