VMS Help CONVERT, file, Qualifiers, /SORT  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Specifies whether the input file is to be sorted before being
    loaded into an indexed file. The sort is done according to the
    primary key of the output file.

    Format

      /SORT  (DEFAULT)

      /NOSORT

    Two procedures can improve the sort performance:

    o  Increasing the size of the working set for the duration of the
       sort.

    o  Placing the input file, the output file, and the temporary
       work files on separate disk devices.