Unclean Leader Election

The video tutorial discusses leader election and unclean leader election in distributed systems. It explains the default behavior when in-sync replicas (ISR) fail and the option to enable unclean leader election for improved availability at the cost of potential data loss. The tutorial emphasizes the risks and tradeoffs between availability and consistency, recommending that beginners avoid enabling unclean leader election. Advanced use cases where data loss is acceptable are also covered.

What is the default behavior when all in-sync replicas fail?

• Enable unclean leader election

• Wait for an ISR to come back online

• Switch to a backup server

• Stop all operations

What is a potential risk of enabling unclean leader election?

• Increased data consistency

• Loss of data from ISRs

• Improved data security

• Reduced system availability

What trade-off does enabling unclean leader election involve?

• Availability vs. consistency

• Cost vs. efficiency

• Security vs. performance

• Speed vs. accuracy

For whom is the unclean leader election setting not recommended?

• System administrators

• Beginners

• Advanced users

• Data analysts

In which scenario might unclean leader election be acceptable?

• During metrics and log collection

• When data loss is unacceptable

• For real-time data processing

• For critical financial transactions