What is the use of Service guard

Hi
What is the of service guard, Is this for clustering purpose in O/S level

Service guard is a product implementing a so-called Shared Nothing Cluster.
This means one server is production, and the other server is completely dormant and takes over as soon as the first server crashes and doesn't come back.
This is also called an active/passive cluster.
Oracle has (on 9i) RAC (active-active cluster) and RAC Clusterguard (active-passive). This is the Oracle equivalent of Service Guard.
Sybrand Bakker
Senior Oracle DBA

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