3 points | by kalbasit 10 hours ago ago
1 comments
Building a Nix cache server and faced a classic system design dilemma: chunk compressed data (fast/simple) or decompress first (slow/complex)?
I tested 60k+ NAR files to find out.
Compressed: 6.4% dedup hit rate Uncompressed: 47.8% dedup hit rate
Decompression wins, saving 18% in total storage.
(P.S. To handle the pipeline throughput, I also built the fastest FastCDC implementation in Go: https://github.com/kalbasit/fastcdc)
Building a Nix cache server and faced a classic system design dilemma: chunk compressed data (fast/simple) or decompress first (slow/complex)?
I tested 60k+ NAR files to find out.
Compressed: 6.4% dedup hit rate Uncompressed: 47.8% dedup hit rate
Decompression wins, saving 18% in total storage.
(P.S. To handle the pipeline throughput, I also built the fastest FastCDC implementation in Go: https://github.com/kalbasit/fastcdc)