On 27 Oct 2011, at 12:07, Ricardo Freitas wrote:
> So having a Master-Master where you only write to one Master (lets say the
> main one), you still need the increment and offset changed?
> My guess is no, right?
No, you do need them set because if you switch back and forth between masters it ensures
you won't ever get clashes.
It's common to use an increment of 10 and offsets within that, though be aware that if
you're on a 32-bit system that means your autoincrement fields can run out of numbers
after ~200million records and it will all go horribly wrong, especially in PHP which
doesn't do unsigned ints. It's also very embarrassing. Run MySQL (and PHP) on a 64-bit
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