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CassandraHomeDownloadGetting StartedPlanet CassandraContributeWelcomeVideoSlidesWelcome to Apache Cassandra ™The Apache Cassandra database is the right choice when you need scalability and high availability without compromising performance. Linear scalability and proven fault-tolerance on commodity hardware or cloud infrastructure make it the perfect platform for mission-critical data. Cassandra's support for replicating across multiple datacenters is best-in-class, providing lower latency for your users and the peace of mind of knowing that you can survive regional outages.Cassandra's data model offers the convenience of column indexes with the performance of log-structured updates, strong support for denormalization and materialized views, and powerful built-in caching.Cassandra at NoSql Matters 2012 from jbellisDownloadLatest release 2.1.3 (Changes)Stable release 2.0.13 (Changes)Download optionsOverviewProvenCassandra is in use at Constant Contact,CERN, Comcast, eBay, GitHub, GoDaddy, Hulu, Instagram, Intuit, Netflix, Reddit, The Weather Channel, and over 1500 more companies that have large, active data sets. One of the largest production deployments is Apple's, with over 75,000 nodes storing over 10 PB of data. Other large Cassandra installations include Netflix (2,500 nodes, 420 TB, over 1 trillion requests per day), Chinese search engine Easou (270 nodes, 300 TB, over 800 million reqests per day), and eBay (over 100 nodes, 250 TB). Fault Tolerant Data is automatically replicated to multiple nodes for fault-tolerance. Replication across multiple data centers is supported. Failed nodes can be replaced with no downtime. Performant Cassandra consistently outperforms popular NoSQL alternatives in benchmarks and real applications, primarily because of fundamental architectural choices. Decentralized There are no single points of failure. There are no network bottlenecks. Every node in the cluster is identical. Durable Cassandra is suitable for applications that can't afford to lose data, even when an entire data center goes down. You're in Control Choose between synchronous or asynchronous replication for each update. Highly available asynchronous operations are optimized with features like Hinted Handoff and Read Repair. Elastic Read and write throughput both increase linearly as new machines are added, with no downtime or interruption to applications. Professionally Supported Cassandra support contracts and services are available from third parties. Learn More On The Web Getting Started News and articles FAQ Wiki Mailing Lists Users – General discussion list for users. Subscribe | Unsubscribe | Archives Developers – Development related discussion. Subscribe | Unsubscribe | Archives Commits – Commit notification source repository. Subscribe | Unsubscribe | Archives Client Libraries – Discussion related to the development of idiomatic client APIs. Subscribe | Unsubscribe | Archives Chat Many of the Cassandra dev
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