You are creating a resource definition called WEBAPP for a web-based application that requires an application called WEBVIP. Both WEBVIP and WEBAPP are normally active on a single node, but may fail…

The correct answer is C. pullup (WEBVIP) D. hard(WEBVlP). Start Dependencies Define a hard start dependency for a resource if another resource must be running before the dependent resource can start. For example, if resource A has a hard start dependency on resource B, then resource B must be running before resource A can start…

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Question

You are creating a resource definition called WEBAPP for a web-based application that requires an application called WEBVIP. Both WEBVIP and WEBAPP are normally active on a single node, but may fail over if required to another cluster node in your eight-node cluster. A second VIP application resource called appsvip exists, used by a second application resource called secapp. webvip and webapp must start In the correct sequence. Which two start dependencies would you use for the WEBAPP application resource definition?

Options

Ahard(SECAPP)
Bpullup(SECAPP)
Cpullup (WEBVIP)
Dhard(WEBVlP)
Edispersion(WEBVIP)
Fweak (WEBVIP)

How the community answered

(54 responses)

A
2% (1)
B
7% (4)
C
74% (40)
E
4% (2)
F
13% (7)

Explanation

Start Dependencies Define a hard start dependency for a resource if another resource must be running before the dependent resource can start. For example, if resource A has a hard start dependency on resource B, then resource B must be running before resource A can start. Oracle recommends that resources with hard start dependencies also have pullup start dependencies. weak If resource A has a weak start dependency on resource B, then an attempt to start resource A attempts to start resource B, if resource B is not running. The result of the attempt to start resource B is, however, of no consequence to the result of starting resource A. If resource A has an attraction dependency on resource B, then Oracle Clusterware prefers to place resource A on servers hosting resource B. Dependent resources, such as resource A in this case, are more likely to run on servers on which resources to which they have attraction dependencies are running. Oracle Clusterware places dependent resources on servers with resources to which they are attracted. Use the pullup start dependency if resource A must automatically start whenever resource B starts. This dependency only affects resource A if it is not running. As is the case for other dependencies, pullup may cause the dependent resource to start on any server. Use the pullup dependency whenever there is a hard stop dependency, so that if resource A depends on resource B and resource B fails and then recovers, then resource A is restarted. If you specify the dispersion start dependency for a resource, then Oracle Clusterware starts this resource on a server that has the fewest number of resources to which this resource has dispersion. Resources with dispersion may still end up running on the same server if there are not enough servers to disperse them to. Oracle® Clusterware Administration and Deployment Guide 11g Release 2 (11.2)

Topics

#resource dependencies#hard dependency#pullup dependency#VIP application resources

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