大规模图数据库：Gaffer

Gaffer 是个大规模图数据库。Gaffer 是可以方便存储大规模图的框架，节点和边界有数据统计，比如计数，直方图和草图。这些统计数据是时间窗口的节点和边界属性，可以根据时间动态更新。

• Allow the creation of graphs with summarised properties within Accumulo with a very minimal amount of coding.
• Allow flexibility of statistics that describe the entities and edges.
• Allow easy addition of new types of nodes and edges.
• Allow quick retrieval of data on nodes of interest.
• Deal with data of different security levels - all data has a visibility, and this is used to restrict who can see data based on their authorizations.
• Support automatic age-off of data.

Gaffer 是图形数据库，不是一个图处理系统。

https://github.com/GovernmentCommunicationsHeadquarters/Gaffer