ZooKeeper - A Reliable, Scalable Distributed Coordination System - High Scalability -
ZooKeeper is a high available and reliable coordination system. Distributed applications use ZooKeeper to store and mediate updates key configuration information. ZooKeeper can be used for leader election, group membership, and configuration maintenance. In addition ZooKeeper can be used for event notification, locking, and as a priority queue mechanism. It's a sort of central nervous system for d
How Google Serves Data from Multiple Datacenters - High Scalability -
Update: Streamy Explains CAP and HBase's Approach to CAP. We plan to employ inter-cluster replication, with each cluster located in a single DC. Remote replication will introduce some eventual consistency into the system, but each cluster will continue to be strongly consistent. Ryan Barrett, Google App Engine datastore lead, gave this talk Transactions Across Datacenters (and Other Weekend Projec
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