sMerger = new BlockStructureMerger(src1, src2, dst);
else
sMerger = new StructureMerger(src1, src2, dst);
//sMerger.setNumberOfBits(FieldScore.FIELDS_COUNT);
sMerger.mergeStructures();
try{
src1.close(); src2.close(); dst.close();
} catch (IOException ioe) {
// logger.error("Problem flushing index dst", ioe);
}