Comment 7 for bug 1481038

Things look good to me now.

ipdb> counters_cf.get(old_vers_column, column_start='20150806', column_reversed=True)
OrderedDict([(u'20150806', 2), (u'20150805', 2), (u'20150804', 4), (u'20150803', 16), (u'20150802', 4), (u'20150801', 2), (u'20150731', 13), (u'20150730', 39), (u'20150729', 50), (u'20150728', 51), (u'20150727', 1), (u'20150623', 1), (u'20150523', 1), (u'20150519', 1), (u'20150511', 1), (u'20150509', 1), (u'20150419', 1), (u'20150413', 1), (u'20150329', 1), (u'20150302', 1), (u'20150220', 1), (u'20150130', 1), (u'20150129', 1), (u'20150128', 1), (u'20150103', 1), (u'20141021', 1), (u'20140930', 1), (u'20140917', 1), (u'20140904', 1), (u'20140826', 1), (u'20140818', 1), (u'20140808', 1), (u'20140801', 1), (u'20140723', 1)])

ipdb> counters_cf.get(new_vers_column, column_start='20150806', column_reversed=True)
OrderedDict([(u'20150804', 6), (u'20150803', 7), (u'20150802', 1), (u'20150731', 8), (u'20150730', 24), (u'20150729', 25), (u'20150728', 2), (u'20150727', 1)])

The remaining crashes with the old version are probably slow updaters.