浅谈 Redis 与 MySQL 的耦合性以及利用管道完成 MySQL 到 Redis
㈠ Redis 与 MySQL 的耦合性 ? ?? ? ?? ? ? 在业务架构早期、我们便该吃着碗里的看着锅里的、切莫让MySQL 有梦、而Redis 无心 ? ? 毕竟、有些关系型的结构不适合放到Redis跑、男女搭配、干活不累嘛、推荐让MySQL与Redis喜结连理 ? ?? ? ? 其次、这 2 人、一
㈠ Redis 与 MySQL 的耦合性? ??
? ??
? ? 在业务架构早期、我们便该"吃着碗里的看着锅里的"、切莫让MySQL 有梦、而Redis 无心
? ? 毕竟、有些关系型的结构不适合放到Redis跑、"男女搭配、干活不累"嘛、推荐让MySQL与Redis喜结连理
? ??
? ? 其次、这 2 人、一般是在不同场景做选择、而不会在性能上选择、
? ? 只有在 2 者都可用的情况下、综合性能、硬件成本、运维成本等选择
? ? 比如、网页游戏启用 Redis+MySQL:
? ? 游戏中的:好友关系、排行榜、计数器、队列、cache都很适合通过 Redis来实现
? ??
? ? 再举个例子是新浪微博的架构、比如用户关注关系:
? ? 在 MySQL中是 这样一行一行存储的。而在 Redis中你可以存成一个set,或者zset等
? ? ? ? ??
? ? 大体流程是由 MySQL 复制到 Redis 的
? ? 基本结构应该是:
? ? 1. 发微博-- > 进入消息队列-- > 存入MySQL-- > 复制到Redis
? ? 2. 查询 -- > 查询缓存-- > 查询Redis -- > 查询MySQL
? ??
? ??
? ??
? ? ㈡ 快速迁移 MySQL →→ Redis?
? ??
? ? ? ?① MySQL 要导出的表 david_lin
mysql> desc david_lin; +---------+-------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +---------+-------------+------+-----+---------+-------+ | id | int(11) | NO | PRI | NULL | | | myname | varchar(25) | NO | UNI | NULL | | | mymoney | int(11) | NO | | 0 | | +---------+-------------+------+-----+---------+-------+ mysql> select * from david_lin; +----+--------+---------+ | id | myname | mymoney | +----+--------+---------+ | 1 | david | 100000 | | 2 | rocky | 200000 | +----+--------+---------+
? ? ? ? ??
? ? ? ? ? ? 每行数据中执行的 Redis命令如下:
? ? ? ? ? ? HSET david_lin [myname] [mymoney]
[root@odd ~]# cat mysql_to_redis.sql SELECT CONCAT( "*4\r\n", '$', LENGTH(redis_cmd), '\r\n', redis_cmd, '\r\n', '$', LENGTH(redis_key), '\r\n', redis_key, '\r\n', '$', LENGTH(hkey), '\r\n', hkey, '\r\n', '$', LENGTH(hval), '\r\n', hval, '\r' ) FROM ( SELECT 'HSET' AS redis_cmd, 'david' AS redis_key, myname AS hkey, mymoney AS hval FROM david_lin ) AS t
? ? ? ?③ 开始导入
[root@odd ~]# mysql -uroot -poracle test --skip-column-names --raw <br> <br>? ? ? ?④ 在Redis 里查询 <p> </p><pre class="brush:php;toolbar:false">redis 127.0.0.1:6379> hgetall david 1) "david" 2) "100000" 3) "rocky" 4) "200000"
? ? 这里仅是个 demo、数据量小、不过、看这结果、有些类似行转列哈、列运算了、有木有 :)
? ??
? ? By David Lin
? ? 2013-05-30
? ? Good Lucky
作者:linwaterbin 发表于2013-5-30 22:11:24 原文链接
阅读:82 评论:0 查看评论
原文地址:浅谈 Redis 与 MySQL 的耦合性以及利用管道完成 MySQL 到 Redis 的高效迁移, 感谢原作者分享。

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