Decoding binary protocols in python is far away from the speed one knows from C based decoders. Static typing with Cython to the rescue.

I just pushed the code for my replication changes on launchpad:

$ bzr branch lp:~jan-kneschke/mysql-proxy/replication

The presentation should be available ... soon.

One of the first examples is about filtering binlogs. If you want to remove all ALTER statements from the replication stream (or in this case the binlog ...

On the mailing lists we get the question from time to time:

How can I access internal information inside a proxy script ?

MC documented them in the manual, perhaps it is easier to get an idea if you see a picture instead.

The file is generated from a .dot file ...

The MySQL Proxy was split into

• a chassis which handles cmdline, service, logging, plugin loading
• a core library for the life-cycle, network handling and protocol decoding
• a lua layer wrapping around the internals
• a set of plugins: proxy, admin, debug, replicant

It also contains a few tools that reuse the ...

Inspired by http://blogs.sun.com/thava/entry/dump_mysql_frm_file_header I jumped into http://forge.mysql.com/wiki/MySQL_Internals_File_Formats and tried to write a decoder for the .frm files. Sadly the internals document is missing all the interesting parts.

So it was time to get the hands dirty and get into ...

If you use replication with MySQL and memcache at the same time you have the problem to make sure that the memcached and the slave are in sync. If you announce the memcached to mark a entry as dirty and let it update the value from the slave BEFORE it ...

This is an idea I came across at the MySQL UC last week: How many applications handle failing COMMITs correctly ? And how can we test it ?

COMMITs can fail. The most simple case are deadlocks. The sad side of deadlocks is that they only happen under real load when you ...

If you use a transactional storage engine in MySQL like InnoDB some of your transaction may be terminated by the storage engine because of deadlocks. Sadly it is a bit tricky to see what has led to the deadlock. SHOW ENGINE INNODB STATUS gives only a very minimal look into ...

After some delay we are proud to present MySQL Proxy 0.6.1.

This is a pure bug-fix release and fixes some assert()oins and the win32 support. It was branched off in December and it took a while to clean up the windows package until it passed the tests ...

At MySQL I'm writing several different command-line applications from the MEMo Agent to the MySQL Proxy. They all have a common set of requirement:

• command-line options
• config-files (mapping cmd-line options to config-files)
• logfile handling (syslog, SIGHUP, ...)
• a mainloop (SIGINT, CtrlHandler, ...)
• daemonizing (daemonize, services, ...)
• plugin handling

In the proxy svn ...