Comparison of structured storage software

Not to be confused with COM Structured Storage.

Structured storage is computer storage for structured data, often in the form of a distributed database.^[1] Computer software formally known as structured storage systems include Apache Cassandra,^[2] Google's BigTable^[3] and HBase.^[4]

Comparison

The following is a comparison of notable structured storage systems.

Project Name	Type	Persistence	Replication	High Availability	Transactions	Rack-locality Awareness	Implementation Language	Influences, Sponsors	License
AllegroGraph	Graph database	Yes	No - v5, 2010	Yes	Yes	No	Common Lisp	Franz Inc.	Commercial, Limited Free Version
Apache Jackrabbit	Key-value & Hierarchical & Document	Yes	Yes	Yes	Yes	likely	Java	Apache, Roy Fielding, Day Software	Apache 2.0
Berkeley DB/Dbm/Ndbm (bdb)1.x	Key-value	Yes	No	No	No	No	C	old school	Various
Berkeley DB Sleepycat/Oracle Berkeley DB 2.x	Key-value	Yes	Yes	Unknown	Yes	No	C, C++, or Java	dbm, Sleepycat/Oracle	dual BSD-like Sleepycat License/commercial
Cassandra	Key-value	Yes	Yes	Distributed	Eventually consistent	Yes	Java	Dynamo and BigTable, Facebook/Digg/Rackspace	Apache 2.0
CouchDB	Document	Yes	Yes	replication + load balancing	Atomicity is per document, per CouchDB instance	No	Erlang	Lotus Notes / Ubuntu, Mozilla, IBM	Apache 2.0
Extensible Storage Engine(ESE/NT)	Document or Key-value	Yes	No	No	Yes	No	C++, Assembly	Microsoft	per Windows License
GigaSpaces	Tuple Space & Relational & Document & key-value	Yes	Yes	Yes	Yes	Depends on user configuration	Java	Tuple space	commercial
GT.M	Key-value	Yes	Yes	Yes	Yes	Depends on user configuration	C (small bits of assembly language)	FIS	AGPL v3
Project Name	Type	Persistence	Replication	High Availability	Transactions	Rack-locality Awareness	Implementation Language	Influences, Sponsors	License
HBase	Key-value	Yes. Major version upgrades require re-import.	See HDFS, S3 or EBS.	maybe with Zookeeper in 0.21?	Unknown	See HDFS, S3 or EBS.	Java	BigTable	Apache 2.0
Hypertable	Key-value	Yes	Yes, with KosmosFS and Ceph	coming in 2.0	coming	Yes, with KosmosFS	C++	BigTable	GPL 2.0
Information Management System IBM IMS aka DB1	Key-value. Multi-level	Yes	Yes	Yes, with HALDB	Yes, with IMS TM	Unknown	Assembler	IBM since 1966	Proprietary
Memcached	Key-value	No	No	No	Yes	No	C	Six Apart/Couchbase/Fotolog/Facebook	BSD-like permissive copyright by Danga
MongoDB	Document (JSON)	Yes	Yes	fail-over	Single document atomicity	No	C++	10gen	GNU AGPL v3.0
Neo4j	Graph database	Yes	Yes	Yes	Yes	No	Java	Neo Technology	GNU GPL v3.0
Redis	Key-value	Yes. But last few queries can be lost.	Yes	No	Yes	No	Ansi-C	VMWare, Memcache	BSD
SimpleDB (Amazon.com)	Document & Key-value	Yes	Yes (automatic)	Yes	Unknown	likely	Erlang	Amazon.com	Amazon internal only
Tarantool	Free-dimensional tuples with primary and secondary keys	Yes. (Asynchronous)	Yes	Yes	Yes	No	Objective C, Lua	Memcached, Mnesia, MySQL, Mail.ru	BSD
Project Name	Type	Persistence	Replication	High Availability	Transactions	Rack-locality Awareness	Implementation Language	Influences, Sponsors	License

See also

• Structured storage

References

1. ^ Hamilton, James (3 November 2009). "Perspectives: One Size Does Not Fit All". http://perspectives.mvdirona.com/CommentView,guid,afe46691-a293-4f9a-8900-5688a597726a.aspx. Retrieved 13 November 2009. 
2. ^ Lakshman, Avinash; Malik, Prashant. Cassandra - A Decentralized Structured Storage System. Cornell University. http://www.cs.cornell.edu/projects/ladis2009/papers/lakshman-ladis2009.pdf. Retrieved 13 November 2009. 
3. ^ Chang, Fay; Jeffrey Dean, Sanjay Ghemawat, Wilson C. Hsieh, Deborah A. Wallach, Mike Burrows, Tushar Chandra, Andrew Fikes, and Robert E. Gruber. Bigtable: A Distributed Storage System for Structured Data. Google. http://labs.google.com/papers/bigtable-osdi06.pdf. Retrieved 13 November 2009. 
4. ^ Kellerman, Jim. "HBase: structured storage of sparse data for Hadoop". http://www.rapleaf.com/pdfs/hbase_part_2.pdf. Retrieved 13 November 2009. ^{[dead link]}