Right, that&#x27;s the real value here — holding databases accountable for their claims. Zookeeper clearly documented that writes are consistent but reads aren&#x27;t, so it &quot;passed&quot; Jepsen cleanly. The Etcd guys claimed reads are linearizable, so Aphyr  tested for linearizability and it failed.<p><a href="https:&#x2F;&#x2F;aphyr.com&#x2F;posts&#x2F;291-call-me-maybe-zookeeper" rel="nofollow">https:&#x2F;&#x2F;aphyr.com&#x2F;posts&#x2F;291-call-me-maybe-zookeeper</a><p><a href="https:&#x2F;&#x2F;aphyr.com&#x2F;posts&#x2F;316-call-me-maybe-etcd-and-consul" rel="nofollow">https:&#x2F;&#x2F;aphyr.com&#x2F;posts&#x2F;316-call-me-maybe-etcd-and-consul</a>