Oracle 19c Clusterware What-If Command Entities

Clusterware and RAC troubleshooting
Answer Correct answer: C, D, E — Local resources, Administrator-defined resources, and Pluggable Databases (PDBs) can be evaluated using the 'what-if' command.

For which three entities can the "what-if" command evaluation be used to determine the impact of clusterware management operations in Oracle 19c Clusterware? (Choose three.)

  1. Cluster resources
  2. Database transactions
  3. Local resources Correct Answer
  4. Administrator-defined resources Correct Answer
  5. Pluggable Databases (PDBs) Correct Answer

Community Votes

ACD
75%
ADE
25%

75% of anonymous learners picked answer ACD. Votes are pick records left by other test-takers — they are not the verified answer.

Community Insight

Tests knowledge of srvctl what-if capabilities while trapping candidates who assume only traditional local/cluster resources apply.

Determines which three entity types support the 'what-if' command evaluation for clusterware management operations in Oracle 19c. The page establishes that local resources, administrator-defined resources, and pluggable databases are the correct targets.

Candidates often select ACD (Cluster resources, Local resources, Administrator-defined resources) because they overlook that Pluggable Databases (PDBs) are also supported via specific relocation evaluations.

Community Discussion (3 comments)

Tunglinfo9 👍 1 Selected: ADE
Pluggable Databases (PDBs). TRUE. You can use srvctl relocate pdb -eval or srvctl relocate service -eval to see the potential impact of relocating a PDB or a service associated with a PDB. This helps you understand which instances will be affected and how the PDB and its services will be moved. You can also evaluate the impact on PDBs when activating a policy using crsctl activate serverpool <pool_name> -eval or srvctl activate serverpool -serverpool <pool_name> -eval --- Local resources. FALSE. While local_resource is a type of cluster resource that can be created, the -eval option is intended for evaluating the impact of commands that affect cluster-managed resources and their dependencies. It won't provide specific insights into resources that are purely local to an operating system and not managed by Clusterware
217972f 👍 2 Selected: ACD
Sure of ACD
xRodge 👍 1 Selected: ACD
Given answer ACD is correct From documentation: "Oracle Clusterware 12c has the ability to react to events in the system and produce a response action plan. This action plan consists of a series of resource state transitions and/or server pool reconfigurations. What-If response plans are available for the following event categories: • Resources: start, stop, relocate, add, and modify • Server Pools: add, remove, and modify • Servers: add, remove and relocate • Policies: change active policy • Server Category: modify" https://www.oracle.com/docs/tech/database/oracle-clusterware-12c-overview.pdf

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Expert Analysis

Why the Answer Is Correct

The 'what-if' capability in Oracle Clusterware allows administrators to evaluate the impact of operations without executing them. According to Oracle documentation, this applies to Local resources (Option C), Administrator-defined resources (Option D), and Pluggable Databases (PDBs) (Option E). For PDBs, commands like srvctl relocate pdb -eval provide the necessary impact analysis.

Why the Other Options Are Wrong

Cluster resources (Option A) is a distractor; while related, the specific terminology used in the context of the 'what-if' response plans distinguishes between local resources and broader cluster resource categories. Database transactions (Option B) are internal database mechanisms not directly managed or evaluated by the clusterware 'what-if' engine.

Community Comment Notes

User Tunglinfo9 correctly identifies that PDBs are included, citing srvctl relocate pdb -eval. User xRodge references documentation regarding event categories but ultimately supports ACD, missing the nuance of PDB support. The community split highlights the difficulty of remembering PDBs as a distinct 'what-if' target.

Official Reference

https://docs.oracle.com/en/database/oracle/oracle-database/19/crfrw/relocating-pluggable-databases.html

Exam Strategy

Focus on the specific entities mentioned in the 'What-If' response plan documentation, paying close attention to modern features like PDBs which are often overlooked in favor of traditional RAC components.

Frequently Asked Questions

Why are Pluggable Databases (PDBs) included in 'what-if'?

PDBs can be relocated using srvctl, and the -eval flag allows checking impact on instances and services.

Is 'Cluster resources' a valid option for 'what-if'?

No, the specific documentation lists Local resources, Administrator-defined resources, and PDBs as the evaluable entities.

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