On Mon, Mar 29, 2010 at 2:41 PM, Joe Stump <j...@joestump.net> wrote: > I know at least three Diggers patrol the list and one of them is a committer > to Cassandra. Last I heard from my former coworkers at Digg was that > ZooKeeper can be more overhead than wanted when doing locks in a high write > environment.
ZK basically does 2PC for each write, so all the ZK members need to be in the same datacenter. Digg is operating 2 data centers now, so that's not a good fit -- either you have bad latency every time a client in the 2nd DC needs to access ZK or everyone has terrible write performance. ZK should be fine in a single datacenter though. -Jonathan
