ApacheDS Distributed Database Backends

Introduction

Implemetations

At Apache

• Cassandra (incubation)
• CouchDB
• Hadoop HBase

Outside Apache

• MongoDB
• Valdemort
• ...

Feature Matrix - Similarities and Differences

Supported Platforms

• Linux, Windows, ...
• Java based
• Embeddable for unit tests

Data Model

• Column-oriented (BigTable)
• Document
• Key/Value

APIs

• Native APIs, Java APIs, REST, Thrift
• Query capabilities

Data Processing

• Realtime
• Map/Reduce

Scalability, Partitioning

• Distributed storage
• Distributed queries
• Indexing
• Handling of binary data / streaming support

Replication, HA

ACID Characteristics

Performance Considerations

Resources

Comparision of NoSQL databases

Cassandra Wiki
CouchDB Wiki
HBase Wiki