一个异构数据库的集群中间件(转)
Product: Sequoia Database Clustering Technology
Sequoia is a transparent middleware solution offering clustering, load balancing and failover services for any database. Sequoia is the continuation of the C-JDBC project. The database is distributed and replicated among several nodes and Sequoia balances the queries among these nodes. Sequoia handles node and network failures with transparent failover. It also provides support for hot recovery, online maintenance operations and online upgrades.
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/