I like to have 3 replicas across 3 racks in each datacenter as a rue of thumb. You can vary that, but it depends upon the use case, and the SLA's for latency.
This can get a little complicated if you're using the cloud and automated deployment strategies as I like to use the same abstractions externally as internally. -- Colin Clark +1-320-221-9531 > On Jan 18, 2015, at 9:49 PM, Kevin Burton <bur...@spinn3r.com> wrote: > > How do people normally setup multiple data center replication in terms of > number of *local* replicas? > > So say you have two data centers, do you have 2 local replicas, for a total > of 4 replicas? Or do you have 2 in one datacenter, and 1 in another? > > If you only have one in a local datacenter then when it fails you have to > transfer all that data over the WAN. > > > > -- > Founder/CEO Spinn3r.com > Location: San Francisco, CA > blog: http://burtonator.wordpress.com > … or check out my Google+ profile >
