Configuring High Availability Database
Clustering for WDM
High-availability clusters (also known as HA clusters or failover clusters) are groups of computers that
support server applications that can be reliably utilized with a minimum down-time. They operate by
harnessing redundant computers in groups or clusters that provide continued service when system
components fail.
If a server running a particular application crashes, then without clustering, the application is unavailable
until the crashed server is fixed. HA clustering remedies this situation by detecting hardware/software
faults, and immediately restarting the application on another system without requiring administrative
intervention. This process is termed failover.
HA clusters usually use a heartbeat private network connection which is used to monitor the health and
status of each node in the cluster.
The most common size for a HA cluster is a two-node cluster.
Figure 1. WDM High Availability Database Clustering
This section provides the steps to configure high-availability (HA) database clustering for Dell Wyse
Device Manager (WDM) version 5.0 and above.
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