We loaded 5 million columns into a single row and when accessing the first 30k and last 30k columns we saw no performance difference. We tried just loading 2 rows from the beginning and end and saw no performance difference. I am sure reverse sort is there for a reason though. In what context do you actually see a performance difference with reverse sort???
5 million columns took us a while to load into a single row(in fact, a bit slower than loading 10 million columns into 100 rows took on 4 node cluster) and we could load more if needed, but we don't anticipate going beyond 10 million columns in a row at this point. Thanks, Dean