> For AI agents: the complete documentation index is available at /llms.txt, the full documentation bundle is available at /llms-full.txt.

# Node Hours

> **Themelio compatibility reference.** This page describes the retained Themelio implementation or its historical design. Check the [parallel-operation guide](/compatibility/index.md) before applying it to the current platform.

Node hours are the unit of compute usage measurement for HPC environments like Daedalus. Since the bulk of processing is done in compute nodes collaborating as part of distributed systems, usage is measured in node hours to account for scalability, fault tolerance, and parallel processing across multiple nodes.

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