The only significant change in the protocol is the new metalayout format: `#a#b#c` instead of the previously proposed `a#b#c#` .
### Disk storage format
The disk storage format was changed rendering existing binary data files incompatible. However, if you have any existing data - which is important, open an issue - because we'll be able to provide a tool that can help you easily migrate your existing datasets - with a one line command - so - no worries!