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| How VCS ensures application availability | ||
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When VCS detects an application or node failure, VCS brings application services up on a different node in a cluster. VCS virtualizes IP addresses and system names, so client systems continue to access the application and are unaware of which server they use.
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For example, in a 2-node cluster consisting of db-server1 and db-server2, a virtual address may be called db-server. Clients access db-server and are unaware of which physical server hosts the db-server.
Switchover and failover are the processes of bringing up application services on a different node in a cluster.