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Why does using multiple datacenters in Kafka improve availability?

easy📝 Conceptual Q11 of 15
Kafka - Multi-Datacenter and Replication
Why does using multiple datacenters in Kafka improve availability?
ABecause if one datacenter fails, others can continue serving data
BBecause it reduces the total amount of data stored
CBecause it makes Kafka run faster on a single machine
DBecause it removes the need for data replication
Step-by-Step Solution
Solution:

  1. Step 1: Understand what availability means in Kafka

    Availability means Kafka can keep working and serving data even if some parts fail.

  2. Step 2: Explain how multiple datacenters help availability

    By having data in multiple datacenters, if one datacenter goes down, others still have the data and keep Kafka running.

  3. Final Answer:

    Because if one datacenter fails, others can continue serving data -> Option A

  4. Quick Check:

    Multi-datacenter = High availability [OK]
Quick Trick: Think: backup locations keep service running [OK]
Common Mistakes:
MISTAKES
  • Confusing availability with performance
  • Thinking multi-datacenter reduces data size
  • Believing replication is not needed

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