VMS Help MERGE, Output File Qualifiers, /BUCKET_SIZE, Example  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  $ SORT/KEY=(POS:1,SIZ:80) STATS1.DAT,STATS2.DAT -
  _$ SUMMARY.LIS/BUCKET_SIZE=16/RELATIVE

      This SORT command results in the output file SUMMARY.LIS that
      has a bucket size of 16 with relative organization.