my @AoH=(
      {secID=>'SZ0001',
       date=>20090201,
       dataentry=>1, # dataentry is start address in data file '20090201.bin'
       filename=>'20090201.bin'}

       {secID=>'SZ0002',
       date=>'20090201'
       dataentry=>2,
       filename=>'20090201.bin'}

       {secID=>'SZ0001',
       date=>'20090202'
       dataentry=>1,
       filename=>'20090202.bin'}
       
       {secID=>'SZ0002',
       date=>'20090202'
       dataentry=>2,
       filename=>'20090202.bin'}


     )