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Active Cache is the integration of Coherence and WebLogic Server. Which component is NOT part of this integration?
WebLogic Server includes features that allow deployed applications to easily use Coherence data caches, and seamlessly incorporate Coherence*Web (not A) for session management and TopLink Grid (not C) as an object-to-relational persistence framework. Collectively, these features are referred to as ActiveCache.
ActiveCache is employed by applications running on WebLogic Server and provides replicated and distributed caching services that make an application's data available to all servers in a Coherence data cluster. New features in this release provide direct access by applications to data caches, either through resource injection or component-based JNDI lookup, and let you display, monitor, create, and configure Coherence clusters using the WebLogic Server Administration Console and WLST.
A highly available WebLogic cluster in UNIX is configured for automatic server migration. Node Managed is configured on both machines to start managed servers.
How should you simulate a managed server failure to test whether automatic server migration is working?
Note:
* It is recommended that you shutdown WebLogic Server instances through the Administration Console.
* If automatic server migration is enabled, the servers are required to contact the cluster leader and renew their leases periodically. Servers will shut themselves down if they are unable to renew their leases. The failed servers will then be automatically migrated to the machines in the majority partition.
Identify three components of the WebLogic JMS architecture.
The major components of the WebLogic JMS Server architecture, as illustrated in the figure below.
* (A) JMS servers that can host a defined set of modules and any associated persistent storage that reside on a WebLogic Server instance.
* (B) JMS modules contains configuration resources (such as queues, topics, and connections factories) and are defined by XML documents that conform to the weblogic-jmsmd.xsd schema.
* Client JMS applications that either produce messages to destinations or consume messages from destinations.
* JNDI (Java Naming and Directory Interface), which provides a resource lookup facility. JMS resources such as connection factories and destinations are configured with a JNDI name. The runtime implementations of these resources are then bound into JNDI using the given names.
* (E) WebLogic persistent storage (file store or JDBC-accessible) for storing persistent message data.
The following figure illustrates the WebLogic JMS architecture.
You are configuring a JMS server with a need for load balancing the messages. To achieve the load balance you should _______and _______.
Load Balancing for JMS
WebLogic Server JMS supports server affinity for distributed JMS destinations and client connections. (B, not A)
By default, a WebLogic Server cluster uses the round-robin method to load balance objects. To use a load balancing algorithm that provides server affinity for JMS objects (not D), you must configure the desired method for the cluster as a whole.
You want to use WLST to view metrics for a running domain. Which command should you issue to navigate through the Mbean hierarchy containing the metrics?
Similar to the configuration information, WebLogic Server runtime MBeans are arranged in a hierarchical data structure. When connected to an Administration Server, you access the runtime MBean hierarchy by entering the serverRuntime or the domainRuntime command. The serverRuntime command places WLST at the root of the server runtime management objects, ServerRuntimeMBean; the domainRuntime command, at the root of the domain-wide runtime management objects, DomainRuntimeMBean.
