Berkeley DB Java Edition Oracle Berkeley DB Java Edition is an open source, embeddable, transactional storage engine written entirely in Java. It takes full advantage of the Java environment to simplify development and deployment. The architecture of Oracle Berkeley DB Java Edition supports very high performance and concurrency for both read-intensive and write-intensive workloads. Depending on your needs choose between Berkeley DB Java Edition's Direct Persistence Layer (DPL), Persistent Collections API, or simply store key/value pairs of arbitrary data. If your application requires something outside the bounds of relational databases then Berkeley DB Java Edition is likely to be the best choice. The majority of Java solutions use object-to-relational (ORM) solutions like the Java Persistence API (JPA) to map class and instance data into rows and columns in a RDBMS.
Social network analysis software Social network analysis software (SNA software) is software which facilitates quantitative or qualitative analysis of social networks, by describing features of a network either through numerical or visual representation. Overview Some SNA software can perform predictive analysis. This includes using network phenomena such as a tie to predict individual level outcomes (often called peer influence or contagion modeling), using individual-level phenomena to predict network outcomes such as the formation of a tie/edge (often called homophily models) or particular type of triad, or using network phenomena to predict other network phenomena, such as using a triad formation at time 0 to predict tie formation at time 1. Network analysis software generally consists of either packages based on graphical user interfaces (GUIs), or packages built for scripting/programming languages. GUI packages are easier to learn, while scripting tools are more powerful and extensible. See also
Jeremy Zawodny's blog I found myself reading NoSQL is a Premature Optimization a few minutes ago and threw up in my mouth a little. That article is so far off base that I’m not even sure where to start, so I guess I’ll go in order. In fact, I would argue that starting with NoSQL because you think you might someday have enough traffic and scale to warrant it is a premature optimization, and as such, should be avoided by smaller and even medium sized organizations. You will have plenty of time to switch to NoSQL as and if it becomes helpful. Until that time, NoSQL is an expensive distraction you don’t need. Uhm… WHAT?! Home - GitHub Rexster is a graph server that exposes any Blueprints graph through REST and a binary protocol called RexPro. The HTTP web service provides standard low-level GET, POST, PUT, and DELETE methods, a flexible extensions model which allows plug-in like development for external services (such as adhoc graph queries through Gremlin), server-side “stored procedures” written in Gremlin, and a browser-based interface called The Dog House. Rexster Console makes it possible to do remote script evaluation against configured graphs inside of a Rexster Server.1 Rexster Kibbles is a collection of various Rexster server extensions provided by TinkerPop. Please join the Gremlin users group at for all TinkerPop related discussions. Access graphs via the Basic REST API:
Home · tinkerpop/pipes Wiki Pipes is a dataflow framework using process graphs. A process graph is composed of Pipe vertices connected by communication edges. A Pipe implements a simple computational step that can be composed with other Pipe objects to create a larger computation. Such data flow graphs allow for the splitting, merging, looping, and in general, the transformation of data from input to output. There are numerous Pipe classes that come with the main Pipes distribution. Once a good understanding of each Pipe accomplished, then using the framework is straightforward.
Titan: Distributed Graph Database Titan is a scalable graph database optimized for storing and querying graphs containing hundreds of billions of vertices and edges distributed across a multi-machine cluster. Titan is a transactional database that can support thousands of concurrent users executing complex graph traversals in real time. In addition, Titan provides the following features: Download Titan or clone from GitHub. Read the Titan documentation and join the mailing list. Metaprogramming Metaprogramming usually works in one of three ways. The first way is to expose the internals of the run-time engine to the programming code through application programming interfaces (APIs). The second approach is dynamic execution of expressions that contain programming commands, often composed from strings, but can also be from other methods using arguments and/or context. Thus, "programs can write programs."
AllegroGraph News August 2011 AllegroGraph News November, 2013 In this issue Free Webcast: Augmenting Hadoop for Graph Analytics Wednesday, November 20 - 10:00 AM Pacific E-commerce sites, auction sites, financial institutions, insurance companies and telephone companies all have event based data that describes transactions between customers (Social Networks) that are located in time and space (GeoTemporal). Bulbs API Open-source Python library for graph databases. Bulbs Bulbs is an open-source Python library for graph databases. Bulbs supports pluggable backends and currently has bindings for Neo4j Server and Rexster. Rexster is the Blueprints server and so this means Bulbs supports any Blueprints-enabled graph database, including: Neo4j, InfiniteGraph, OrientDB, Dex, TinkerGraph, and OpenRDF Sail.
Home · tinkerpop/blueprints Wiki Blueprints is a collection of interfaces, implementations, ouplementations, and test suites for the property graph data model. Blueprints is analogous to the JDBC, but for graph databases. As such, it provides a common set of interfaces to allow developers to plug-and-play their graph database backend. Moreover, software written atop Blueprints works over all Blueprints-enabled graph databases. Representing time dependent graphs in Neo4j · SocioPatterns/neo4j-dynagraph Wiki Background Large-scale data collection efforts using wearable sensors to mine for proximity of individuals (for example, the SocioPatterns project) produce time-varying social graphs, where nodes are individuals, edges represent proximity/contact relations of individuals, and the proximity graph changes over time. Both nodes and edges can have rich attributes.
Glossary of graph theory Graph theory is a growing area in mathematical research, and has a large specialized vocabulary. Some authors use the same word with different meanings. Some authors use different words to mean the same thing. This page attempts to describe the majority of current usage. Basics
Database Models: Hierarcical, Network, Relational, Object-Oriented, Semistructured, Associative and Context. The context data model combines features of all the above models. It can be considered as a collection of object-oriented, network and semistructured models or as some kind of object database. In other words this is a flexible model, you can use any type of database structure depending on task.