Learn how to refresh the Linklist Lookaside (LLA) in mainframe systems using the F LLA,REFRESH command. Discover the correct syntax and understand why this command is essential for maintaining optimal system performance.
Table of Contents
Question
Which command is used to Refresh LL
A. P LLA,REFRESH
B. C LLA,REFRESH
C. F LLA,REFRESH
D. None
Answer
The correct command used to refresh the Linklist Lookaside (LLA) in mainframe systems is:
C. F LLA,REFRESH
Explanation
The Linklist Lookaside (LLA) is a feature in mainframe systems that helps improve the performance of the system by caching directory entries of frequently used modules. When changes are made to the linklist libraries, such as adding or updating modules, the LLA needs to be refreshed to reflect these changes.
The F LLA,REFRESH command is used to refresh the LLA. This command instructs the system to update the LLA with the latest information from the linklist libraries. The “F” stands for “MODIFY,” which is a command used to modify the behavior of a running system component. In this case, it modifies the behavior of the LLA by refreshing its contents.
The other options provided in the question are incorrect:
A. P LLA,REFRESH – The “P” command is not a valid command for modifying the LLA.
B. C LLA,REFRESH – The “C” command is not a valid command for modifying the LLA.
D. None – This option suggests that none of the provided commands are correct, which is not true since option C is the correct answer.
In summary, the F LLA,REFRESH command is the correct choice for refreshing the Linklist Lookaside (LLA) in mainframe systems. Using this command ensures that the LLA is up-to-date with the latest changes in the linklist libraries, which helps maintain optimal system performance.
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