Hi Piotr! Yes, HBase is storing data in a sorted fashion, rows with similar row keys will be stores close to eachother. So if you want to only scan rows in a specific range and use that as an input for your map-reduce job this is possible in two ways. You can either use a filter that filters out the rows not included in this range or as soon as we get 0.20 out you can specify the start and the stop row in the Scan object. So when you are out of that range you can safely stop scanning, not really sure how this was done in 0.19 and earlier.
Hope that this can help. Regards Erik
