I built one recently. We have a SQLite VFS built on top of Zookeeper for doing metadata-like stuff. We can pull between 1000-100000 reads per seconds out of it.<p>I realize that this is a total abuse of what Zookeeper does, and how it is supposed to work, but hey, this is a solution that&#x27;s _simple_ and _correct_.<p>Here are the benchmarks comparing the traditional VFS with the ZK VFS: <a href="https:&#x2F;&#x2F;gist.github.com&#x2F;sargun&#x2F;7503ba636c1a0eb2e2f5cda7a6a23db2" rel="nofollow">https:&#x2F;&#x2F;gist.github.com&#x2F;sargun&#x2F;7503ba636c1a0eb2e2f5cda7a6a23...</a><p>PS: Feel free to ask me any questions