Hi, all
I'm looking for some advice re compression with NVME. Compression helps
performance with a minor CPU hit - but is it still worth it with the far
higher throughputs offered by newer PCI and NVME-type SSDs?
I've ordered a PCIe-to-M.2 adapter along with a 1TB 960 Evo drive for my
home desktop. I previously used compression on an older SATA-based Intel
520 SSD, where compression made sense.
However, the wisdom isn't so clear-cut if the SSD is potentially faster
than the compression algorithm with my CPU (aging i7 3770).
Testing using a copy of the kernel source tarball in tmpfs it seems my
system can compress/decompress at about 670MB/s using zstd with 8
threads. lzop isn't that far behind. But I'm not sure if the benchmark
I'm running is the same as how btrfs would be using it internally.
Given these numbers I'm inclined to believe compression will make things
slower - but can't be sure without knowing if I'm testing correctly.
What is the best practice with benchmarking and with NVME/PCI storage?
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