Re: Behavior on inconsistent reads

2012-05-14 Thread aaron morton
What sort of corruption are you thinking about ? Whenever the first CL nodes involved in a read do not agree on the current value a process is run to resolve their differences. This can result in an a node that is out of sync getting repaired. Cheers - Aaron Morton Freelance

RE: Behavior on inconsistent reads

2012-05-11 Thread Carpenter, Curt
I (now) understand that the point of this is to get the most recent copy (at least of the nodes checked) if all replicas simply haven't been updated to the latest changes. But what about dealing with corruption? What if the most recent copy is corrupt? With a Zookeeper-based transaction system on

Behavior on inconsistent reads

2012-05-10 Thread Carpenter, Curt
Hi all, newbie here. Be gentle. From http://www.datastax.com/docs/1.0/cluster_architecture/about_client_reque sts: Thus, the coordinator first contacts the replicas specified by the consistency level. The coordinator will send these requests to the replicas that are currently responding most

Re: Behavior on inconsistent reads

2012-05-10 Thread Dave Brosius
If you read at Consistency of at least quorum, you are guaranteed that at least one of the nodes has the latest data, and so you get the right data. If you read with less than quorum it would be possible for all the nodes that respond to have stale data. On 05/10/2012 09:46 PM, Carpenter,