Orientdb is an open source, non relational database management system. It is used under general hardware and can be stored at the speed and capacity of 150,000 files per second. It is written in Java and belongs to a document database that supports acid tx,http://www.aliyun.com/zixun/aggregation/16666.html ">indexes,asynch queries,sql layer , clustering, and so on, to support ACID transaction processing. Implemented using Java hardware-based.
ORIENTDB is a scalable document-graphics database management system with the flexibility of the text-block database and the ability of graphic database management link. Optional modeless, full mode, or mixed mode. Supports many advanced features such as acid transactions, fast indexing, native and SQL query capabilities. You can import and export documents in JSON format. If you don't perform expensive join operations, a relational database can retrieve hundreds of linked document graphs in milliseconds.
Orientdb 1.0RC7 This version increases storage speed by up to 500 times times. SQL inserts the syntax that supports the map. There is a new date () function. HTTP interface Jsonp support. Create a database, import a database, and export the database has been added, and many errors have been repaired (a total of 34 phases).
Software Information: http://www.orientechnologies.com/orient-document.htm
Download Address:
http://code.google.com/p/orient/downloads/detail?name=orientdb-1.0rc7.zip&can=2&q=
http://code.google.com/p/orient/downloads/detail?name=orientdb-graphed-1.0rc7.zip&can=2&q=