-- William Gibson, All Tomorrow's Parties
hdp noted that since our databases are now entirely InnoDBized (all the MyISAMisms have been ripped out), we no longer need to lock the entire database to get a consistant dump.
Others have written about MySQL backups, so I will just say that it makes me happy I no longer have to entirely rely on the validity of our replicas to get good backups. (Or lock the master for half an hour to get a dump.)
(Of course, all may not be light and fairies in the land of MySqueel, but if you've used it extensively for any period of time, I guess you know that already.)
And yes, it terrifies me to consider that the replicas are out of sync with the master, but errors definitely creep in. It saddens me.
In happier news, there is a new Slony-I site in the works, it seems.