000-221 · Question #4
What are key considerations when planning for Live Application Mobility?
The correct answer is B. That the WPAR is checkpointable and both global environments are on the same subnet. Live Application Mobility in AIX requires the WPAR to support checkpointing and both the source and destination global environments to reside on the same subnet so the WPAR's network identity is preserved during migration.
Question
What are key considerations when planning for Live Application Mobility?
Options
- AThe WPAR is an Application WPAR and both global environments are at the same AIX level
- BThat the WPAR is checkpointable and both global environments are on the same subnet
- CThe NFS services are running and applications are stopped
- DThe NFS services are running and there is an HMC attached to both managed systems
How the community answered
(27 responses)- A15% (4)
- B74% (20)
- C4% (1)
- D7% (2)
Why each option
Live Application Mobility in AIX requires the WPAR to support checkpointing and both the source and destination global environments to reside on the same subnet so the WPAR's network identity is preserved during migration.
Live Application Mobility applies to System WPARs, not Application WPARs, and requires checkpointability rather than merely matching AIX levels between systems.
The checkpoint facility captures and transfers the complete runtime state of the WPAR to the destination system, which is what makes the migration 'live' without stopping applications. Being on the same subnet ensures the WPAR retains its IP address and network connections transparently after the move. Without both conditions, the live migration either cannot capture application state or will break network connectivity upon arrival.
Live Application Mobility is specifically designed to migrate running applications without stopping them, so requiring applications to be stopped contradicts the purpose of the feature.
An HMC is used for managing logical partitions and is not a prerequisite for WPAR Live Application Mobility, which operates at the AIX OS level independently of partition management tools.
Concept tested: AIX WPAR Live Application Mobility prerequisites
Source: https://www.ibm.com/docs/en/aix/7.3?topic=mobility-live-application-mobility
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