||Oracle Tips by Burleson
Oracle10g Grid Computing
Chapter 3 - High
Performance and Highly Available
UDB EEE Architecture
DB2 UDB EEE supports a diverse set of hardware
options including SMP, MPP, NUMA, and RISC servers, and clustered
configurations with a range of interconnect options. DB2 exploits
high-availability solutions on each platform. DB2 UDB EEE can run on
multiple operating systems including IBM AIX, Linux, HP-UX, Sun
Solaris, and Windows NT.
General Requirements for Parallel Database Clusters
In this section, let us examine the critical
issues pertaining to the scalable cluster and the parallel database:
Avoiding Split Brain
It is reasonable to expect that server
components are prone to failures. It is the responsibility of the
cluster to detect and monitor and stabilize the application running
on the cluster. Clusters Systems are geared to handle peculiar
situations like Amnesia and Split Brain conditions.
Amnesia occurs when the cluster restarts after
a shutdown with cluster data older than at the time of the shutdown.
This can happen if multiple versions of the framework data are
stored on disk and a new incarnation of the cluster is started when
the latest version is not available.
For more information,
see the book
Grid and Real Application Clusters 30% off if you
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Written by top Oracle
experts, this RAC book has a complete online code depot with
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