1  INVOKE
   This command prompts you for a script and initiates your choice.
   The scripts guide you through the design and optimization of a
   data file to ensure that complex operations are completed in a
   logical fashion. If a script is aborted, script operations and
   calculations are discarded, except for clearing the previous
   definition. All scripts assume that the files you are desiging
   reside on a Files-11 disk.
 

ADD_KEY

   Modeling and addition of a new index's parameters. See
   documentation under the "INDEXED" script for more information
   about the design modes used in this script.
 

DELETE_KEY

   Removal of the highest index's parameters.
 

INDEXED

   The Edit/FDL utility asks several questions and then enters a
   graphical design mode that allows modeling of the file indexes.
   Two such modes are available: Line_plot and Surface_plot modes.
   These refer to the type of graph on which the Edit/FDL utility
   will display its calculated design choices. The basic goal of
   these plots is to allow you to choose the best trade-off between
   index bucket size versus index depth. While many of the other
   file parameters have a significant effect on file performance,
   these two are the most important.

   o  Line_plot - This design mode uses a graph that responds to
      adjustments in the file design parameters. The current values
      of the parameters are shown at the bottom of the screen and
      you set them to new values to see their effect on the depth of
      the index.

   o  Surface_plot - This design mode will graph a surface that
      indicates index depth versus bucket size versus one other
      parameter, which is swept through a range of values. The
      choice of the 'other parameter' which is swept through a range
      is: Load Fill Percent, Key Length, Record Size, Initial Load
      Record Count, and Additional Record Count.

      To aid in selecting an optimal bucket size for a particular
      value of 'other parameter', a Recommended Range is delimited
      on the surface plot. Bucket size values within this range
      should provide a reasonably good trade-off between a flatter
      index (less I/O) and larger buckets (more RMS processing).
      Depending on your terminal's capabilities, the Recommended
      Range is delimited either with "/"s on either side or by
      the lightest or green shading. The left-most edge of the
      Recommended Range will produce the flattest file for a given
      bucket size, but if you're not very sure of the real-life
      accuracy of all the answers given about the application
      environment, it is better to be more conservative and choose a
      value somewhere closer to the middle of the Recommended Range.
      The default answer to the bucket size question is equivalent
      to the left-most edge of the Recommended Range.
 

OPTIMIZE

   This script is basically a Redesign of a particular index, with
   the additional feature of using actual file structure data. The
   ANALYZE/RMS_FILE utility can gather the required statistics
   with the DCL ANALYZE/RMS/FDL command (which produces an FDL
   file containing Analysis_of_area and Analysis_of_key Primary
   sections).

   The /ANALYSIS=file-spec qualifier of the DCL EDIT/FDL command is
   used to input that information into the Edit/FDL utility.
 

RELATIVE

   Selection of parameters for a Relative file
 

SEQUENTIAL

   Selection of parameters for a Sequential file
 

TOUCHUP

   This script allows the modification of one index's parameters at
   a time. Only those FDL attributes pertaining to the chosen index
   are changed. See documentation under the "INDEXED" script for
   more information about the design modes used in this script.

   Format

     INVOKE
 

2  Example

 Main Editor Function     (Keyword)[Help] : INVOKE


                               Script Title Selection

          Add_key     modeling and addition of a new index's parameters
          Delete_key  removal of the highest index's parameters
          Indexed     modeling of parameters for an entire Indexed file
          Optimize    tuning of all indices' parameters using file
                      statistics
          Relative    selection of parameters for a Relative file
          Sequential  selection of parameters for a Sequential file
          Touchup     remodeling of parameters for a particular index

          Editing Script Title     (Keyword)[-] :

     This command allows you to select which script you want to help
     you design your FDL file. After you enter the INVOKE command,
     the Edit/FDL utility prompts you with another menu displaying
     the possible script choices.