FlockDB is an
open-source
Open source is source code that is made freely available for possible modification and redistribution. Products include permission to use the source code, design documents, or content of the product. The open-source model is a decentralized sof ...
distributed,
fault-tolerant
Fault tolerance is the property that enables a system to continue operating properly in the event of the failure of one or more faults within some of its components. If its operating quality decreases at all, the decrease is proportional to the ...
graph database
A graph database (GDB) is a database that uses graph structures for semantic queries with nodes, edges, and properties to represent and store data. A key concept of the system is the ''graph'' (or ''edge'' or ''relationship''). The graph relat ...
for managing wide but shallow network graphs.
It was initially used by
Twitter
Twitter is an online social media and social networking service owned and operated by American company Twitter, Inc., on which users post and interact with 280-character-long messages known as "tweets". Registered users can post, like, and ...
to store relationships between users, e.g. followings and favorites. FlockDB differs from other graph databases, e.g.
Neo4j
Neo4j is a graph database management system developed by Neo4j, Inc. Described by its developers as an ACID-compliant transactional database with native graph storage and processing, Neo4j is available in a non-open-source "community edition" ...
in that it is not designed for multi-hop graph traversal but rather for rapid set operations, not unlike the primary use-case for
Redis
Redis (; Remote Dictionary Server) is an in-memory data structure store, used as a distributed, in-memory key–value database, cache and message broker, with optional durability. Redis supports different kinds of abstract data structures, suc ...
sets.
Since it is still in the process of being packaged for outside of Twitter use, the code is still very rough and hence there is no stable release available yet. FlockDB was posted on
GitHub
GitHub, Inc. () is an Internet hosting service for software development and version control using Git. It provides the distributed version control of Git plus access control, bug tracking, software feature requests, task management, co ...
shortly after Twitter released its
Gizzard framework, which it uses to
query
In general, a query is a form of questioning, in a line of inquiry.
Query may also refer to:
Computing and technology
* Query, a precise request for information retrieval made to a database or information system
** Query language, a computer la ...
the FlockDB distributed
datastore. The database is licensed under the
Apache License.
Twitter no longer supports FlockDB.
See also
*
Gizzard (Scala framework)
Gizzard is an open source sharding framework to create custom fault-tolerant, distributed databases. It was initially used by Twitter and emerged from a wide variety of data storage problems. Gizzard operates as a middleware networking servic ...
References
External links
*
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Graph databases
2010 software
Free database management systems
Free software programmed in Java (programming language)
Java platform
Free software programmed in Scala
Fault-tolerant computer systems
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