In theory with correct settings you should get all (or be told that the results are partial, e.g when shard is unavailable or timed out). In practice there are

In theory with correct settings you should get all (or be told that the results are partial, e.g when shard is unavailable or timed out). In practice there are bugs, which are notoriously difficult to find and reproduce when you go distributed. Jepsen is closest to that I know about.