I've done some similar testing with my ZFS pool with excellent results. I have hundreds of gigabytes of rarely used and easily compressible data that I store a

I've done some similar testing with my ZFS pool with excellent results. I have hundreds of gigabytes of rarely used and easily compressible data that I store as gzip-9 and all of my data is at least lzjb compressed. I also experimented a little with different checksums and found that sha256 was too slow so I use fletcher4.