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Rescooped by Abhishek kapoor from BigData NoSql and Data Stuff
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Facebook Apollo NoSQL Database

Facebook Apollo NoSQL Database | Big data | Scoop.it
Facebook’s latest project is a NoSQL database called Apollo that provides online low latency hierarchical storage. The details of the database project were revealed at QCon New York on Wednesday by Jeff Johnson, a software engineer in Facebook’s Core Data group. He described Apollo as a distributed database around strong consistency using Paxos-style quorum protocols. Paxos is a family of quorum consensus protocols, originally defined for deriving a single agreed result from a number of possibilities on a network of unreliable processors. It can be used in replicated databases to overcome the problems caused if distributed servers fail. In order for an update to be accepted it must be voted on by a majority of servers within a shard, and updates are only completed when they make their way to a majority of servers. Distributed databases suffer from a problem described using the CAP or Brewer’s theorem, which states that a distributed database can’t achieve the following all at the same time: Consistency of data across nodesAvailability in the sense of always responding to requests;Partition tolerance in working even if part of the network is unavailable
Via Alex Kantone
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Rescooped by Abhishek kapoor from BigData Hadoop Ecosystem
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VMware Updates Big Data Extensions with Hadoop 2 Support - Virtualization Review

VMware Updates Big Data Extensions with Hadoop 2 Support - Virtualization Review | Big data | Scoop.it
“ Virtualization Review VMware Updates Big Data Extensions with Hadoop 2 Support Virtualization Review VMware Inc. on Friday updated its Big Data Extensions (BDE) for its vSphere virtualization platform, including support for Hadoop 2.”
Via Charles Gerth
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