Thoughts Cassandra integration with full-stack reactivity in Meteor?

Looking for insights from anyone with experience using other DBs in Meteor. What steps would you imagine to make a complete Cassandra integration for Meteor? Would we need to write a “minicassandra” for the front end if we want the latency compensation? Can we make reactive Meteor subscriptions that serve data we pull from Cassandra? Etc?

Some insight here: https://github.com/graphql/graphql-js/issues/660
I guess an integration could be done with Apollo but these guys talk about some complexities there.