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A UDF(user defined functions) plugin for MySQL, which can be used for pushing data to Redis
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branch: master

README.md

MySQL2Redis

This is a user-defined function (UDF) plugin for MySQL, which can provide some redis command support function to push data from MySQL to Redis.

This application just test on CentOS 6.2(Final),MySQL Server 5.1 and 5.5. In a Dell Server PowerEdge R601 (CPU Xeon(R) E5506 * 8, 24GB Memory), about 3000 calls in a second.

If you want to a thread-able solution, you can try this project of dawnbreaks.

Requirements

  1. MySQL2Redis is built with HiRedis. So, you should install the library first.

  2. MySQL2Redis is a plugin for MySQL, with the UDF support, so the MySQL server you used must support this feacture. See the UDF for more information.

Installation

Use the ./install.sh script.

Test

See the test directory.

Uninstallation

Using the uninstall.sh

Notice

When you do a lot of redis_command() calling in a short time, you may get a lot of error like this "Connection error on (xxxx/xxx): Cannot assign requested address" in the error log of MySQL Server. And, at the same time, you can see a lot of TIME_WAIT in the netstat command output.

In this case, you can set the kernel parameters or try to modify the code in hiredis on socket operation (setsockopt() with SO_REUSEADDR).

vi /etc/sysctl.conf

net.ipv4.tcp_syncookies=1

net.ipv4.tcp_tw_reuse=1

net.ipv4.tcp_tw_recycle=1

and /sbin/sysctl -p to make it be usefull.

Support

You may ask for help and discuss various other issues on the ... and report bugs on the bug tracker.

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