I did my job. You can benefit from that.

WARNING: nerdy ops stuff below

Want to add low-latency counter support to your app and already run OpenTSDB? Don't like how OpenTSDB only takes updates via TCP? No, I don't either. I wrote a hacky proxy to accept UDP increment and decrement operations and send updates to OpenTSDB. It uses a persistent intermediary to store the values before updating OpenTSDB. It's up on the githubs. Have fun. RTFM.

https://github.com/scurvy/OpenTSDB-UDP-Proxy