What was that replicated filesystem back in the 90s that promised to be the next NFS, but with disconnected operation and merging when you came back online? Co

What was that replicated filesystem back in the 90s that promised to be the next NFS, but with disconnected operation and merging when you came back online? Coda, that's right. I had such high hopes for it in my move to using a laptop as my primary machine, but never got it working despite several attempts at it. Admittedly they weren't more than a couple hours at a given time...