We have at least redis in rumprun-packages -- <a href="https:&#x2F;&#x2F;github.com&#x2F;rumpkernel&#x2F;rumprun-packages&#x2F;tree&#x2F;master&#x2F;redis" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;rumpkernel&#x2F;rumprun-packages&#x2F;tree&#x2F;master&#x2F;r...</a> -- which AFAIK was packaged based on a non-toy need.<p>Yes, the need for persistent storage for persistent values is quite solid ;-)