I know it's probably not a good idea to use multiget, but for my use case, it's the only choice,

I have question regarding the SlicePredicate argument of the multiget_slice

The SlicePredicate takes slice_range which takes start, end and range. I suppose start and end will apply to each individual row. How about range, is it a accumulative column count of all the rows or to the individual row? 
If I set range to 100, is it 100 columns per row, or total?

Thanks for you reply,