In this webinar we will discuss:
- The concept of a floating Central node
- How to failover / failback in a graceful way
- Live Demonstration
- Troubleshooting Tips
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Q&A - Failover in Qlik Sense
Q: Why would an administrator want to utilize fail-over?
A: To allow resiliency in the environment. The obvious use of this is if the Repository database and Apps are hosted off the Central node.
Q: What build is fail-over introduced?
A: Fail-over was introduced in the June 2017 release.
Q: Is the fail-over automatic or API driven?
A: Both are possible. By default, it fails over after 10 minutes (http://help.qlik.com/en-US/sense/June2017/Subsystems/PlanningQlikSenseDeployments/Content/Deployment/Failover.htm). Or earlier based on API calls.
Q: Can you fail-over if the Central node hosts the Repository Database and the apps?
A: Yes, but there's little added value to this style of deployment.
Q: Do you have to add a new node to allow the node to be a fail-over candidate?
A: Out of the box, yes. If you're comfortable with APIs then you can elevate an existing RIM node. See article Elevating an existing RIM node to fail-over candidate in June 2017 or higher in our knowledge base.