В Птн, 08/02/2013 в 09:47 -0500, John Madden пишет:
As far as I can see there is no difference in configuration. The only distinction I can see is the "use case", as N-Way supposed to accept writes on all Masters, but Mirror only on one at a time.
There are configuration differences (see the Admin Guide for the needed snippets; N-Way requires MirrorMode and then some) but yes, MirrorMode requires writes to go to only one node at a time.
I've re-red those sections of docs two more times, still don't see the difference
This is not clearly stated anywhere, so do they really differ only in proxy/balancer in front of Mirrors?
Well I'd say that's a pretty big difference, wouldn't you? :)
Sure, this is a big difference if you look at it as on Deployment/Usage case scenarios.
And, as the proxy/balancer for Mirror mode could be setup separately, I would think of Mirror mode as of identical configuration to N-Way Multi-Master, plus a separate/combined proxy/balancer.
It would be very helpful if somebody can confirm that Mirror mode and N-Way Multi-Master setups are identical in *configuration* not counting proxy/ballancer. I would be thankful for pointers on the difference in setups if that if not true.
If so, why can't I do 3 Mirrors with proxy/balancer in front?
You can have multiple replicas, you just have to ensure writes only go to the current master.
So, Mirror mode can be setup across more than 2 Servers?