053 Question No. 521

521.You notice a job in a chain have not completed on a nonconstrained RAC database. Which of
These is valid reasons why is that might occur?
A. The job priority is 1 and the resource consumer group CPU Emphasis allocation are a low percentage.
B. The job affinity is to a service and one node in this service is unavailable.
C. The job affinity is to a instance and that instance is unavailable.
D. There is no service affinity.
E. None of the above.

Answer: C

the Scheduler enables you to specify the database service under which a job should is run (service AF finity). This ensures better availability than instance affinity because it guarantees the other nodes can be dynamically Assigned to the service if a instance goes down . Instance Affinity does not has this capability, so, when a Instance goes down, none of the jobs with an affinity to that Instance can run until the instance comes back Up. figure 28-8 illustrates A typical example of what services an D instances could be used.

Figure 28-8 Service Affinity and the Scheduler

Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced.

053 Question No. 521