Zetta is an open-source NoSQL database that supports Transaction and Cloud Spanner like API
$> cd zetta
$> make zetta-server
$> ./bin/zetta-server -store tikv -path='{pd.address:port}'
Note:
We are working on this, but could use more help since it is a massive project.
Zetta is under the Apache 2.0 license. See the LICENSE file for details.