Nosql数据库分类：

Nosql DEFINITION:Next Generation Databases mostly addressing some of the points: being non-relational,distributed,open-source and horizontally scalable.

The original intention has been modern web-scale databases. The movement began early 2009 andis growing rapidly. Often more characteristics apply such as: schema-free,easy replication support,simple API,eventually consistent / BASE (not ACID),a huge amount of data and more. So the misleading term "nosql" (the community nowtranslates it mostly with " not only sql") should be seen as an alias to something like thedefinition above.

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Wide Column Store / Column Families

Document Store

Key Value / Tuple Store

Graph Databases

Multimodel Databases

Object Databases

Grid & Cloud Database Solutions

XML Databases

Multidimensional Databases

Multivalue Databases

Classification based on data model

以下列表来自于http://en.wikipedia.org/wiki/NoSQL

Stephen Yen in his blog post "A yes for Nosql taxonomy" suggests the following:

Term	Matching Database
KV Store	keyspace Flare SchemaFree RAMCloud Oracle Nosql Database(OnDB)
KV Store - Eventually consistent	Dynamo Voldemort Dynomite SubRecord Mo8onDb Dovetaildb
KV Store - Ordered	TokyoTyrant Lightcloud NMDB Luxio MemcacheDB Actord
KV Cache	Memcached Repcached Coherence Infinispan EXtremeScale JBossCache Velocity Terracoqua
Tuple Store	Gigaspaces Coord ApacheRiver
Object Database	ZopeDB DB40 Shoal
Document Store	CouchDB Couchbase MongoDB Jackrabbit XML-Databases ThruDB CloudKit Prsevere Riak-Basho Scalaris
Wide Columnar Store	Bigtable Hbase Cassandra Hypertable KAI OpenNeptune Qbase KDI

Classification based on feature

Ben Scofield categorized Nosql databases based on nonfunctional categories (“(il)ities“) plus a rating of their feature coverage:

Data Model	Performance	Scalability	Flexibility	Complexity	Functionality
Key-Value Stores	high	high	high	none	variable (none)
Column Store	high	high	moderate	low	minimal
Document Store	high	variable (high)	high	low	variable (low)
Graph Database	variable	variable	high	high	graph theory
Relational Database	variable	variable	low	moderate	relational algebra.

http://nosql-database.org/