一个异构数据库的集群中间件(转)

Features in a nutshell

• No modification of existing applications or databases.
• Operational with any database providing a JDBC driver.
• High availability provided by advanced RAIDb technology.
• Transparent failover and recovery capabilities.
• Performance scalability with unique load balancing and query result caching features.
• Integrated JMX-based administration and monitoring.
• 100% Java implementation allowing portability across platforms with a JRE 1.4 or greater.
• Open source licensed under Apache v2 license.
• Professional support, training and consulting provided by Continuent Inc∞.
  
  Sequoia is the core technology providing database clustering capabilities. It is composed of a controller implementing the RAIDb (Redundant Array of Inexpensive Databases)∞ technology.
  
  Sequoia controllers are replicated for HA and scalability purposes. Controllers use group communication to synchronize the cluster. Hedera∞ is a group communication wrapper that can be plugged to work with multiple group communication implementations such as Appia∞, JGroups or Spread.
  
  Sequoia comes with a JDBC driver for Java application. Additional drivers for PHP, Perl, ODBC∞, MySQL native API∞ and C/C++ applications are also provided through the Carob project∞. with transparent failover capabilities.

参考网址：

http://code.google.com/p/tungsten-replicator/