BatchScanner bs = conn.createBatchScanner(table, Constants.NO_AUTHS, 20);
for (long i = 0; i < iterations; i += 1) {
Text[] columns = randTerms.get(rand.nextInt(randTerms.size()));
bs.clearScanIterators();
bs.clearColumns();
IteratorSetting ii = new IteratorSetting(20, "ii", IntersectingIterator.class);
IntersectingIterator.setColumnFamilies(ii, columns);
bs.addScanIterator(ii);