[willis936]

Most zstd implementations are multithreaded for single compression and decompression tasks. My home server has 24 cores and is using 16x PCIe 3.0 for storage (16 GB/s). Through benchmarking I found that I am storage bound from zstd-3+ and compute bound from zstd-2 and zstd-1. I run zstd-3.

[1_player]

Dumb question, but shouldn't it be the opposite? The lower the compression level, the faster the CPU can process the data, making storage the bottleneck. Higher compression level -> CPU becomes the bottleneck.

[willis936]

I believe in the TrueNAS interface I use these are negative compression levels. I could be wrong. It was just some empirical observations. I may flesh out my matrix more to paint a better picture.