Zookeeper easy
How does ZooKeeper organize its data internally?
- A As a relational table with rows and columns.
- B As a flat list of keys.
- C As a Hierarchical Namespace (Tree) looking like a standard filesystem, where nodes are called ZNodes.
- D As a graph of connected objects.
Answer: C. As a Hierarchical Namespace (Tree) looking like a standard filesystem, where nodes are called ZNodes.
The data is structured in a tree, referenced by paths like `/app/config/db`. Each node in the tree (ZNode) can store data and have children.
One system design question a day, with spaced repetition so the ones you miss come back.
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?