• MongoDB
• 

• Provision
• -
• Verison
• 2.2.3
• OS
• CentOS 5.4

MongoDB is a document-based NoSQL DB, which has very good scalability using open source DB. It isalso very easy to save JSON-type data.

• Riak (1.2.0 2012-08-06) Debian x86_64
• 

• Provision
• -
• Verison
• 1.2.1
• OS
• Ubuntu 10.04 64bit

Riak is the Amazon Dynamo-based NoSQL DB. It is storing Key-Value which is Jason document. Key characteristics of Riak is dispersed storage, masterless and data reproduction etc.

• Cassandra Database
• 

• Provision
• Apache Software Foundation
• Verison
• 1.1.14
• OS
• CentOS 5.4

Cassandra Database also can be used in VM environment. Cassandra Database is the representative NoSQL which has high scalability. It is good for BigData model-based service, which is showing HA(High Availability) with multi node and non-concentrated structure.

• PostgreSQL
• 

• Provision
• PostgreSQL Global Development Group
• Verison
• 9.1.9
• OS
• ubuntu 12.04 (64Bit)

PostgreSQL is ORDBMS(object-relational database management system), provided by license(MIT-style). It supports ACID transaction, succession and UnicodeSQL-92 standard.