Hi!

> Don't be so eager.
> 
> Replication will break in funny ways when a 5.1 master will get a v5
> event.

??? what do you mean? 



> In the best scenario, all mysql4 slaves stop replicating at once,
> overloading the 5.1 ones and leading the wiki to a halt.

We can run the site off a single slave, usually (well, probably need to send 
watchlists to blackhole for a while, but.. ;-)

> Domas ends up
> removing the offending statement with a hex editor or upgrading all the
> slaves in a hurry.

Who in the sane mind upgrades masters before slaves? 

> Do we have at least one 5.1 slave per 5.1-mastered pool ?

Did we have ever any non-5.1 slave per 5.1-mastered pool?

Domas
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