I endeavored to do some testing of the twp.mysql2 to twp.mysql3 transition today, but without complete success. On my main dev machine, I've upgraded to mysql 5.5. I did that to ensure that the new code solves the problems of working with 5.5. However, on 5.5 the old code doesn't work so I can't do a test migration on that machine. I have a few others to choose from.

The migration process is primarily documented here but there are some additional details:

• Put up the 503 error setup on tiddlyspace.com
• Turn off all the database related cronjobs
• Make a full backup of the database
• Put innodb support back in mysql by editing my.cnf
• Before the migration the mysql3 branch of the TiddlySpace code should be merged to master.
• Shutdown memcached, remove tiddlywebplugins.caching as the store, switching back to direct twp.tiddlyspace.store.
• Migrate according to the other docs.
• After the data is migrated but before the web server is started back up, the new code (from the branch) needs to be installed.
• turn back on the cronjobs (in /etc/cron.d and /etc/cron.daily)