# No more disks: the architecture behind stateless compute in ClickHouse Cloud

DevFeed: [No more disks: the architecture behind stateless compute in ClickHouse Cloud](<https://devfeed.tech/articles/no-more-disks-the-architecture-behind-stateless-compute-in-clickhouse-cloud-5085.md>)

Original publisher: [Read original article](<https://clickhouse.com/blog/clickhouse-cloud-stateless-compute>)

Author: Tom Schreiber

Published: 2025-07-09T00:00:00Z

Content type: article

Language: en

Sources: [ClickHouse Blog](<https://devfeed.tech/sources/clickhouse-blog.md>)

Topics: [clickhouse](<https://devfeed.tech/topics/clickhouse.md>), [Cloud](<https://devfeed.tech/topics/cloud.md>), [Databases](<https://devfeed.tech/topics/databases.md>), [Apache Iceberg](<https://devfeed.tech/topics/apache-iceberg.md>)

Tags: [architecture](<https://devfeed.tech/tags/architecture.md>), [atomic](<https://devfeed.tech/tags/atomic.md>), [building](<https://devfeed.tech/tags/building.md>), [catalog](<https://devfeed.tech/tags/catalog.md>), [clickhouse](<https://devfeed.tech/tags/clickhouse.md>), [cloud](<https://devfeed.tech/tags/cloud.md>), [cloud-native](<https://devfeed.tech/tags/cloud-native.md>), [latency](<https://devfeed.tech/tags/latency.md>), [low-latency](<https://devfeed.tech/tags/low-latency.md>), [scale](<https://devfeed.tech/tags/scale.md>), [state](<https://devfeed.tech/tags/state.md>), [stateless](<https://devfeed.tech/tags/stateless.md>), [storage](<https://devfeed.tech/tags/storage.md>)

## AI overview

This post explains how ClickHouse Cloud achieved fully stateless compute by introducing an in-memory database engine powered by a Shared Catalog. Compute nodes no longer depend on local disks, enabling fast elastic provisioning, rapid wake-ups, and stateless processing across native and open data formats.

## Source excerpt

ClickHouse Cloud compute is now fully stateless. This post introduces the final piece that made it possible, a new in-memory database engine powered by a Shared Catalog, and walks through how we got there.