---
title: "Discussion on \"CosmosDB Partition Internals: Logical vs Physical Partitions Explained\" | Hashnode"
description: "Discussion on \"CosmosDB Partition Internals: Logical vs Physical Partitions Explained\". How CosmosDB maps your partition key to physical storage — and why the wrong choice costs 10x more at scale"
url: "https://hashnode.com/posts/cosmosdb-logical-vs-physical-partitions/69e436c884751f11f5e3b425"
---

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# [CosmosDB Partition Internals: Logical vs Physical Partitions Explained](https://abstractalgorithms.hashnode.dev/cosmosdb-logical-vs-physical-partitions?utm_source=hashnode&utm_medium=feed)

How CosmosDB maps your partition key to physical storage — and why the wrong choice costs 10x more at scale

Apr 19 · 16 min read · abstractalgorithms.hashnode.dev  
Updated Jun 18  
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-   [#partitioning](https://hashnode.com/tag/partitioning)

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