Have you used cyanite in any meaningful way? The original author's (pyr) repo has been pretty dead.
This person has been doing a lot of good work: https://github.com/mwmanley/cyanite
I've considered it but haven't made the jump yet. Pyr gave a presentation a few weeks ago that suggested his company is already using it and further development is coming.
Cyanite: https://github.com/pyr/cyanite and https://github.com/brutasse/graphite-cyanite
KairosDB: https://github.com/kairosdb/kairosdb and https://github.com/kairosdb/kairos-carbon and https://github.com/Lastik/KairosdbGraphiteFinder