Hello, I keep reading everywhere that Cassandra has supported multiple datacenters from the beginning. I would like to know what does Cassandra do to achieve that. Is it just that the developers have written some code that supports that scenario, or is there something inherent in Cassandra's design that is suitable for a multi DC environment, like minimizing inter-DC traffic?
I have read about RackAwareStrategy on the wiki, and have also browsed through some code (DataCenterShardStrategy), but I would like to see what people have to say about this. I also read about an implemenetation of Rack Awareness employing Zookeeper, but I gather that wasn't released by Facebook and it was more geared towards single-DC rack awareness because Zookeeper is a bit heavy on the bandwidth. Anyway, just to sum it up, my question is this: please explain in brief the reasons why Cassandra is well suited for multi-DC environments. Alexander Altanis
