首页 / 数据库 / MySQL / Python迁移MySQL数据到MongoDB脚本
MongoDB是一个文档数据库,在存储小文件方面存在天然优势。随着业务求的变化,需要将线上MySQL数据库中的行记录,导入到MongoDB中文档记录。一、场景:线上MySQL数据库某表迁移到MongoDB,字段无变化。二、Python模块:
使用Python的torndb,pymongo和time模块。
*注释:首先安装setup.py,pip,MySQLdb
执行如下命令即可:
pip install torndb
pip install pymongo三、脚本内容如下:
[root ~]#cat nmytomongo.py#!/usr/bin/env python
#fielName: mytomongo.py
#Author:xkops
#coding: utf-8
import torndb,pymongo,time
# connect to mysql database
mysql = torndb.Connection(host="127.0.0.1", database="database", user="username", password="password")
#connect to mongodb and obtain total lines in mysql
mongo = pymongo.MongoClient("mongodb://ip").database
mongo.authenticate("username",password="password")
countlines = mysql.query("SELECT max(table_field) FROM table_name")
count = countlines[0]["max(table_field)"]#count = 300
print counti = 0
j = 100
start_time = time.time()
#select from mysql to insert mongodb by 100 lines.
for i in range(0,count,100):
#print a,b
#print i
#print "SELECT * FROM quiz_submission where quiz_submission_id > %d and quiz_submission_id <= %d" %(i,j)
submission = mysql.query("SELECT * FROM table_name where table_field > %d and table_field <= %d" %(i,j))
#print submission
if submission:
#collection_name like mysql table_name
mongo.collection_name.insert_many(submission)
else:
i +=100
j +=100
continue
i +=100
j +=100
end_time = time.time()
deltatime = end_time - start_time
totalhour = int(deltatime / 3600)
totalminute = int((deltatime - totalhour * 3600) / 60)
totalsecond = int(deltatime - totalhour * 3600 - totalminute * 60)
#print migrate data total time consuming.
print "Data Migrate Finished,Total Time Consuming: %d Hour %d Minute %d Seconds" %(totalhour,totalminute,totalsecond)*注释:按照自己的需求更改上述代码中的数据库地址,用户,密码,库名,表名以及字段名等。四、执行迁移脚本:
[root ~]#python nmytomongo.py &> /tmp/migratelog.txt &
脚本执行完成后查看/tmp/migratelog.txt数据迁移消耗的时间。更多MongoDB相关教程见以下内容:CentOS 编译安装 MongoDB与mongoDB的php扩展 http://www.linuxidc.com/Linux/2012-02/53833.htmCentOS 6 使用 yum 安装MongoDB及服务器端配置 http://www.linuxidc.com/Linux/2012-08/68196.htmUbuntu 13.04下安装MongoDB2.4.3 http://www.linuxidc.com/Linux/2013-05/84227.htmMongoDB入门必读(概念与实战并重) http://www.linuxidc.com/Linux/2013-07/87105.htmUbunu 14.04下MongoDB的安装指南 http://www.linuxidc.com/Linux/2014-08/105364.htm《MongoDB 权威指南》(MongoDB: The Definitive Guide)英文文字版[PDF] http://www.linuxidc.com/Linux/2012-07/66735.htmNagios监控MongoDB分片集群服务实战 http://www.linuxidc.com/Linux/2014-10/107826.htm基于CentOS 6.5操作系统搭建MongoDB服务 http://www.linuxidc.com/Linux/2014-11/108900.htmMongoDB 的详细介绍:请点这里
MongoDB 的下载地址:请点这里本文永久更新链接地址