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Which three JVM options would you add to investigate performance issues in a Hot-Spot JVM?
You want to configure WebLogic so that Managed Servers are restarted when they are in a FAILED state. Which three steps are necessary to accomplish this?
D: auto-kill-if-failed
Specifies whether the Node Manager should automatically kill
this server (the managed server) if its health state is failed.
(Interface=weblogic.management.configuration.ServerMBean Attribute=getAutoKillIfFailed)
When Auto Restart is enabled, Node Manager will try to restart the Managed Server if it crashes or goes down unexpectedly, for instance, as the result of a machine reboot.
E: When Auto Restart is enabled, Node Manager will try to restart the Managed Server if it crashes or goes down unexpectedly, for instance, as the result of a machine reboot.
Which two statements are true regarding the WebLogic domain?
B: A domain consists of one or more WebLogic Server instances (and their associated resources) that you manage with a single Administration Server.
D: In a domain, server instances other than the Administration Server are referred to as Managed Servers. Managed Servers host the components and associated resources that constitute your applications.
Incorrect:
Not A: Each WebLogic Server domain must have one server instance that acts as the Administration Server.
Not C: A domain can include multiple WebLogic Server clusters and non-clustered WebLogic Server instances.
Not E: A Node Manager process is not associated with a specific WebLogic domain but with a
machine. You can use the same Node Manager process to control server instances in
any WebLogic Server domain, as long as the server instances reside on the same
machine as the Node Manager process. Node Manager must run on each computer
that hosts WebLogic Server instances---whether Administration Server or Managed
Server---that you want to control with Node Manager.
A customer has a web application with HTTP Sessions that need to be replicated to a backup site that is more than 100 miles away from the primary site, connected over the Internet.
Which type of session replication in WebLogic is recommended?
WAN HTTP Session State Replication
Resources in a wide area network (WAN) are frequently spread across separate geographical regions. In addition to requiring network traffic to cross long distances, these resources are often separated by multiple routers and other network bottle necks. Network communication in a WAN generally has higher latency and slower interconnect.
Slower network performance within a WAN makes it difficult to use a synchronous replication mechanism like the one used within a MAN. WebLogic Server provides failover across clusters in WAN by using an asynchronous data replication scheme.
Note:
HTTP Session State Replication
Weblogic Server uses two methods for replicating HTTP session state across clusters:
in-memory replication
* Using in-memory replication, WebLogic Server copies a session state from one server instance to another. The primary server creates a primary session state on the server to which the client first connects, and a secondary replica on another WebLogic Server instance in the cluster. The replica is kept up-to-date so that it may be used if the server that hosts the servlet fails.
* JDBC-based persistence
In JDBC-based persistence, WebLogic Server maintains the HTTP session state of a servlet or JSP using file-based or JDBC-based persistence.
JDBC-based persistence is also used for HTTP session state replication within a Wide Area Network (WAN).
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