Name: Key Charliecloud Innovation - Build Cache - Reid Priedhorsky, Los Alamos National Laboratory
Start: 2025-05-07T13:35:00-0500
End: 2025-05-07T13:55:00-0500

May 5-8, 2025
Chicago, IL
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Wednesday May 7, 2025 1:35pm - 1:55pm CDT

Illinois River

Container images are built by interpreting instructions in a machine-readable recipe, typically a Dockerfile, which is often faster with a build cache that stores instruction results for re-use. The standard approach (used e.g. by Docker and Podman) is a many-layered union filesystem, encoding differences between layers as tar archives.

This talk describes a new approach, as implemented in Charliecloud: store changing images in a Git repository. Our experiments show this performs similarly to layered caches on both build time and disk usage, with a considerable advantage for many-instruction recipes. Our approach also has structural advantages: better diff format, lower cache overhead, and better file de-duplication. These results show that a Git-based cache for layer-free container implementations is not only possible but may outperform the layered approach on important dimensions.

LA-UR-25-22140

Speakers

Reid Priedhorsky

Scientist, Los Alamos National Laboratory

I am a staff scientist at Los Alamos National Laboratory. Prior to Los Alamos, I was a research staff member at IBM Research. I hold a Ph.D. in computer science from the University of Minnesota and a B.A., also in computer science, from Macalester College.My work focuses on large-scale... Read More →

Wednesday May 7, 2025 1:35pm - 1:55pm CDT
Illinois River

Charliecloud

HPSF Conference 2025

Reid Priedhorsky

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