fatcache - Memcache on SSD
> False positives from SHA-1 hash collisions are detected after object retrieval from the disk by comparison with the requested key<p>Is that check really necessary?<p>To have <i>1 in a trillion</i> chance of having accidental SHA-1 collision they'd have to store 1.7*10^18 keys, and mere key index of that would require 54000 petabytes of RAM.