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Parallel Database Clustering
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 V Series systems have been certified with MC/Lock Manager
for Oracle Parallel Server and Sun PDB for Oracle Parallel Ser ver.
S t a n d a r d Hot Swap and Redundant Power Supplies
The Lightning 9900 V 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 system.
Figure 22 - Dynamic
Link Manager software
automatically provides
path failover and load
balancing for open
systems.
Hitachi Data Systems
28
Clustering middleware
supports distributed lock
management.