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CKA study material · question 581 of 1000

What is the effect of running etcdctl snapshot save against a live etcd member?

  1. The member is briefly made read-only while the snapshot is written
  2. A snapshot is taken without affecting that member's performance
  3. The member leaves the cluster and rejoins afterwards
  4. Writes are buffered until the snapshot completes
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Answer: B. A snapshot is taken without affecting that member's performance

Creating a snapshot from a live member does not affect its performance; the alternative is copying member/snap/db from a data directory no etcd process is using.

Source: Operating etcd clusters for Kubernetes (Kubernetes) — Backing up an etcd cluster › Built-in snapshot

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