pg数据库的迁移

执行步骤：

• 停止原应用，备份原库
• 创建新库及授权
• 修改备份文件的内容
• 导入数据

1. 备份数据库

[postgres@test ~]$ /usr/pgsql-9.6/bin/pg_dump pp100_loanapply | /bin/gzip > loanapply_$(date +%F).sql.gz  

2.创建数据库并授权

create database db_name owner user_name;

3.将备份的文件上传到新pg服务器上

gzip -dv loanapply_2018-03-22.sql.gz

4.修改备份文件的内容

sed -i  "/osdba/d"  loanapply_2018-03-22.sql
sed -i  "/SET idle_in_transaction_session_timeout = 0;/d"   loanapply_2018-03-22.sql
sed -i  "/SET row_security = off;/d"  loanapply_2018-03-22.sql
sed -i '/plpgsql/d'  loanapply_2018-03-22.sql
sed -i  "/pgpool_/d"  loanapply_2018-03-22.sql

5.导入数据

psql -h 192.168.1.10 -p 3433 -Udba_user   -W  loanapply  <  loanapply_2018-03-22.sql