Re: Cassandra Multiple DataCenter Suitability - why?

2010-06-18 Thread Patrick Hunt
On 06/18/2010 01:20 AM, alta...@ceid.upatras.gr wrote: 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. Bandwidth

Re: zookeeper, how do you feed the pets?

2010-05-17 Thread Patrick Hunt
Hi, ZK uses a quorum protocol (similar but not the same as paxos) for writes, as a result it's sensitive to inter-server latency. (however reads are always local and therefore not effected) Running a cluster fully w/in a colo you can achieve 15k writes/second, with a cluster distributed across

Re: Avro Example Code

2010-05-14 Thread Patrick Hunt
My Avro quickstart has an RPC example for various languages http://bit.ly/32T6Mk Patrick On 05/14/2010 01:52 PM, David Wellman wrote: Does anyone have a good link or example code that we can use to spike on Avro with Cassandra? Cheers.