@prologic@twtxt.net my read on reed-solomon erasure encoding is its the generalized implementation of raid 5, that replication factor is about the data stored’s complete replica count ignoring any capabilities of recovery through FEC. If you’re trusting your FEC, then you’ll be happy with replica-counts of 1. HA, of course, is dependent on use case. CAP teaches us to sacrifice Availability, but you can make very HA systems and keep C & P.
Block size? I assume that’s about compression’s effectiveness - you’ll get better compression with more data.