Zookeeper easy
What does 'Sequential Consistency' mean in ZooKeeper?
- A Requests are processed in random order.
- B Only read requests are ordered.
- C Updates are applied instantly.
- D Updates from a client are applied in the order that they were sent.
Answer: D. Updates from a client are applied in the order that they were sent.
If a client sends Update A followed by Update B, ZooKeeper guarantees that Update A will happen before Update B. It never reorders operations from a single client.
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Get the appRelated questions
- What is the primary technical function of a ZooKeeper 'Watch'?
- A system administrator increases `jute.maxbuffer` to 5MB on every ZooKeeper server to store large configuration objects. However, write operations larger than 1MB still fail. What is the most likely cause?
- By default, `forceSync` is enabled. If you disable it, what trade-off are you making?
- If the specific ZooKeeper node a client is connected to crashes, what should the client do?
- Which cluster configuration has *worse* availability: A 3-node cluster or a 4-node cluster? (Assuming simple majority quorum)
- According to the CAP Theorem, how is ZooKeeper classified?