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UUID Use Case

UUID Node ID

In a distributed system, 'which machine' matters. A UUID node ID is stable per instance and survives IP or hostname changes.

Stable per nodeRestart-safev4

Version

How many

Uppercase Hyphens Braces { }

Result

Generated locally with the Web Crypto API — nothing leaves your browser.

What Is UUID Node ID?

A node ID labels a process in the cluster. A v4 UUID stays constant across restarts even if the pod gets a new IP.
Use it in consensus, shard ownership, and heartbeats.

How to generate

Generate a v4 UUID at process start (or persist per host).
Advertise it in cluster membership.
Reference it in logs and shard maps.

Use Cases

Raft / Paxos peers.
Shard owners.
Kubernetes pod identity.

Code Examples

JavaScript

const id = crypto.randomUUID();

Python

import uuid
id = uuid.uuid4()

Frequently Asked Questions

Persist the node ID or regenerate?

Persist per host so restarts keep identity; regenerate only on true new nodes.

Node ID vs instance ID?

Node ID is the logical member; instance ID may change per deploy. Keep them distinct.

Related tools

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