Features
MongoDB
Riak
HyperTable
HBase
Logical Data Model
Rich Document with support for Nested Document
Rich Document
Column Family
Column Family
Support for CAP
CA
AP
CA
CA
Dynamic Addition/Removal of Node
Supported (Coming shortly in next release)
Supported
Supported
Supported
Multi DC support
Supported
Not Supported
Supported
Supported
Interface
Variety of Language specific APIs (Java, Python, Perl, C# etc.)
JSON over HTTP
REST, Thrift, Java
C++, Thrift
Persistence Model
Disk
Disk
Memory + Desk (Tunable)
Memory + Desk (Tunable)
Comparative Performance
Better (Written in C++)
Best (Written in Erlang)
Better (Written in C++)
Good (Written in Java)
Commercial Support
10gen.com
Basho Technologies
Hypertable Inc
Cloudera
http://www.infoq.com/articles/nosql-in-the-enterprise
