Five graphics databases to focus on

Graphic database is a kind of non relational database, it applies graph theory to store the relation information between entities. The most common example is the http://www.aliyun.com/zixun/aggregation/7518.html "> Relationship between people" in social networks. Relational databases are not good for storing "relational" data, their queries are complex, slow, and beyond expectations, and the unique design of a graphics database compensates for this flaw.

Google's graphics computing system named Pregel, let's introduce you to a few popular graphics databases.

1.neo4j

Neo4j is a popular graphics database, it is open source. Recently, NEO4J's community edition has shifted from following the AGPL license agreement to following the GPL license agreement. Still, the NEO4J Enterprise version still uses the AGPL license. NEO4J is based on a Java implementation, compatible with ACID properties, and supports other programming languages such as Ruby and Python.

2.FlockDB

FLOCKDB is built by Twitter for relational data analysis. FLOCKDB has so far not had a stable version, and it is debatable whether it is a real graphics database.

The difference between FLOCKDB and other graphic databases, such as neo4j and Orientdb, is that the graph is traversed, and Twitter's data model does not need to traverse social maps.

Still, because FLOCKDB is applied to large sites such as Twitter and its simplicity compared to other graphic databases, it deserves our attention.

3.AllegroGraph

Allegrograph is a graphics database built for the resource Description framework based on the standard of the consortium. It is designed to handle linked data and web semantics, and supports SPARQL, rdfs++, and Prolog.

Allegrograph is one of the products of Franz Lnc Inc. (a Web semantic product provider, the flagship product is a Lisp Based Enterprise development tool), and Pfizer, Ford, Kodak, NASA and the U.S. Department of Defense are all clients of the company.

4.GraphDB

Graphdb is a German sones company built on. Net. The Sones company was established in 2007 and has carried out several rounds of financing in recent years. The GRAPHDB Community Edition follows the AGPL V3 license Agreement, and the Enterprise Edition is commercial. Graphdb hosted on Windows Azure platform.

5.InfiniteGraph

Infinitegraph is based on the Java implementation, its goal is to build a "distributed graphics Database", has been used by the U.S. Department of Defense and the United States Central Intelligence Agency.

In addition, there are other graphic databases, such as Orientdb, Infogrid, and Hypergraphdb. Ravel is built on the Pregel implementation of open source, and the Trinity Project of Microsoft is also a graphical database project. (Zhang Zhiping/compiling)

(Responsible editor: The good of the Legacy)