Github user onkarshedge commented on the issue: https://github.com/apache/zeppelin/pull/989 @bzz I had a doubt about versioning approach. Currently I am saving(ipfs add 'note') the note in IPFS for every call to save function. This gives me a new multihash on saving. So for versioning I have to save the multihash with time. The `GitNotebookRepo` has a checkpoint which corresponds to git commit. Here in ipfs each call to ipfs add is like git commit. So the List<Rev> from history function will be large because save() method is called multiple times. So the List<Rev> should contain only those few multihashes which user wants to choose.
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