Справочник Пользователя для Hitachi 9900 Series

This type of middleware is a special version of host failover middleware, which 
supports major parallel database servers like Oracle

®

Parallel Server, Informix

®

XPS, and Sybase

®

MPP. Clustering middleware supports distributed lock 

management, a feature that enables parallel database software running on separate 
cluster nodes to share access to the same database. If one host fails, the other hosts
can take over its work. Database clusters allow a customer to grow a database 
incrementally simply by adding additional nodes. With non-parallel database 
servers, the server has to be replaced or an additional server with another database 
instance has to be purchased and installed when the capacity of the original     
system is exceeded.

The Lightning 9900

™

system has been certified with MC/Lock Manager for 

Oracle

®

Parallel Server and Sun

™

PDB for Oracle

®

Parallel Server.

The Lightning 9900

™

Series provides fully redundant power supplies to ensure

uninterrupted power and cooling to all chassis in the system – supporting full system
power in the event of a power supply failure. In the event of such a failure, the power
supply that has failed can be “hot swapped” without disruption to the power subsystem.

28