Consider the Apache Cassandra database. Introduction In the database history article "What Goes Around Comes Around," (see Resources) Michal Stonebraker describes in detail how storage techniques have evolved over time. Before arriving at the relational model, developers tried other models such as hierarchical and directed graph.
It is worth noting that the SQL-based relational model—which is the de facto standard even now—has prevailed for about 30 years. Given the short history and fast pace of computer science, this is a remarkable achievement. The relational model is so well-established that for many years, selecting data storage for an application was an easy choice for the solution architect. The choice was invariably a relational database. Developments like increasing user bases of systems, mobile devices, extended online presence of users, cloud computing, and multi-core systems have led to increasingly large-scale systems. There are many NoSQL systems, and each relaxes or alters some aspect of the relational model.
Getting Started with NoSQL Apache Cassandra | Planet Cassandra. Apache Cassandra. Apache Cassandra is an open source distributed database management system designed to handle large amounts of data across many commodity servers, providing high availability with no single point of failure. Cassandra offers robust support for clusters spanning multiple datacenters,[1] with asynchronous masterless replication allowing low latency operations for all clients. Cassandra also places a high value on performance. In 2012, University of Toronto researchers studying NoSQL systems concluded that "In terms of scalability, there is a clear winner throughout our experiments. Cassandra achieves the highest throughput for the maximum number of nodes in all experiments Tables may be created, dropped, and altered at runtime without blocking updates and queries.[6] History[edit] Releases after graduation include Licensing and support[edit] Apache Cassandra is an Apache Software Foundation project, so it has an Apache License (version 2.0).
Main features[edit] Decentralized Scalability. GettingStarted. Cassandra documentation from DataStax DataStax's latest Cassandra documentation covers topics from installation to troubleshooting, including a Quick Start Guide. Documentation for older releases is also available. Introduction This document aims to provide a few easy to follow steps to take the first-time user from installation, to running single node Cassandra, and overview to configure multinode cluster.
Cassandra is meant to run on a cluster of nodes, but will run equally well on a single machine. Step 0: Prerequisites and Connecting to the Community Cassandra requires the most stable version of Java 7 you can deploy, preferably the Oracle/Sun JVM. The best way to ensure you always have up to date information on the project, releases, stability, bugs, and features is to subscribe to the users mailing list (subscription required) and participate in the #cassandra channel on IRC.
Step 1: Download Cassandra Download links for the latest stable release can always be found on the website. Tjake: How to set up a 4 node Cassandra cluster in under 2 minutes.