CRDT: Fractional Indexing
CRDTs are often talked about in the same breath as collaborative editing software, but they're useful for much more than that.<p>They really are a theoretical model of how distributed, convergent, multi-master systems have to work. IE the DT in CRDT could be a whole datastore, not as just an individual document.<p>(Wish I could remember who on HN alerted me to this. I had read the paper but didn't grok the full implications).