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| Document revision date: 19 July 1999 | |
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This qualifier specifies the type of graph you want displayed.
/DISPLAY graph-option
graph-option
Specifies the type of graph you want displayed: LINE, FILL, KEY, RECORD, INIT, or ADD.
| LINE | Plots bucket size against index depth. |
| FILL | Plots bucket size by the percentage of load fill by index depth. |
| KEY | Plots bucket size by key length by index depth. |
| RECORD | Plots bucket size by record size by index depth. |
| INIT | Plots bucket size by initial load record count by index depth. |
| ADD | Plots bucket size by additional record count by index depth. |
The default is LINE.
$ EDIT/FDL/DISPLAY=KEY TEMP_DATA
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This command begins an interactive session in which the default value for the type of graph to be displayed has been changed from LINE to KEY. TEMP_DATA is the name of the FDL file to be created.
This qualifier provides you with a choice between smaller buffers and flatter files. You can use /EMPHASIS with the /NOINTERACTIVE qualifier if you want EDIT/FDL to be executed without an interactive terminal dialogue.
/EMPHASIS tuning-bias
tuning-bias
Represents how you want to weight the default bucket size for your file.There are two valid options, FLATTER_FILES and SMALLER_BUFFERS.
FLATTER_FILES Generally increases bucket size. The bucket size, in turn, controls the number of levels in the index structure. If a larger bucket size eliminates one level, then you should use this option. At some point, however, the benefit of having fewer levels will be offset by the cost of scanning through the larger buckets. SMALLER_BUFFERS Generally decreases the amount of memory you have to use. The default is FLATTER_FILES and it should be used unless excessive paging or RMS CPU time occurs because of oversized buffers. However, if your system has little extra memory or if you are not sure which tuning bias will improve the performance of your program, try tuning your file using SMALLER_BUFFERS and then FLATTER_FILES.
$ EDIT/FDL/EMPHASIS=SMALLER_BUFFERS TEMP_DATA
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This command begins an interactive session in which the default value for the bucket size emphasis has been changed from FLATTER_FILES to SMALLER_BUFFERS. TEMP_DATA is the name of the FDL file to be created.
This qualifier specifies the number of key-associated areas in an indexed file. A file can contain from 1 to 255 key-associated areas and each area can contain one or more index levels from one or more keys.Each key definition contains the following area designations:
During input processing, the optimization and redesign functions assign two areas per key, one for data and one for both indexes. During output processing, the area designators are adjusted according to the granularity specified. Checks are made to exclude areas that have no key indexes and to create new key indexed areas where none previously existed.
- DATA_AREA
- LEVEL1_INDEX_AREA
- INDEX_AREA
To assign more than two areas per key (DOUBLE) or to assign nonstandard key and area associations, you must invoke an interactive session. With the granularity qualifier configured as GRANULARITY=DOUBLE, create new areas and set the corresponding area designators to reference the new areas on a per-key basis.
/GRANULARITY n
n
The following table shows the relationship between granularity, key, and area for various values of granularity.
The acceptable values are the numeric values 1, 2, 3, or 4; the literal values ONE, TWO, THREE, FOUR; or the logical value DOUBLE. If you do not specify granularity, the system establishes a default value of three (3).
| Granularity | Key and Area Relationships |
|---|---|
| 1 | All indexes for all keys are assigned to AREA 0. |
| 2 | Primary KEY data to AREA 0, all other indexes for all other keys to AREA 1. |
| 3 | Primary KEY data to AREA 0, Primary KEY indexes to AREA 1, all other indexes for all other keys to AREA 2. |
| 4 | Primary KEY data to AREA 0, Primary KEY indexes to AREA 1, all other key data to AREA 2, all other key indexes to AREA 3. |
| DOUBLE | Primary KEY data to AREA 0, Primary KEY indexes to AREA 1, all other key data to AREA (key_number*2), all other key indexes to AREA ((key_number*2)+1). |
$ EDIT/FDL/GRANULARITY=2 TEMP_DATA.FDL
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This command begins an interactive session in which the output granularity will be two (2). TEMP_DATA.FDL is the name of the FDL file being processed.
This qualifier causes the Edit/FDL utility to execute the Optimize script without a terminal dialogue.
/NOINTERACTIVE
The /NOINTERACTIVE qualifier allows you to optimize an existing FDL file with the Edit/FDL utility but without an interactive terminal dialogue. You must have previously entered the ANALYZE/RMS_FILE/FDL command, specifying your existing RMS data file as the target file, to output an analysis FDL file. The EDIT/FDL utility requires the following data from two sources in order for the Optimize script to proceed noninteractively:
- The analysis sections contained in the analysis FDL file produced by ANALYZE/RMS_FILE/FDL and unique to an analysis FDL
- The FDL definition sections contained in either the original FDL file or the analysis FDL file
If there is no analysis section in the FDL file specified for /ANALYSIS, the Edit/FDL utility exits without producing an output file.
| #1 |
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$ ANALYZE/RMS_FILE/FDL/OUTPUT=TEMP_DATA_ANAL.FDL TEMP_DATA.IDX
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This command should precede a noninteractive Edit/FDL session. It generates an analysis FDL file TEMP_DATA_ANAL.FDL from the data file TEMP_DATA.IDX. If the /OUTPUT specification was not included, this command would have created the analysis FDL file with the default name TEMP_DATA.FDL.
| #2 |
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$EDIT/FDL/ANALYSIS=TEMP_DATA_ANAL.FDL/NOINTERACTIVE -
$_/OUTPUT=TEMP_DATA_OPT.FDL TEMP_DATA.FDL
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This command initiates a noninteractive session in which a new optimized FDL file TEMP_DATA_OPT.FDL is created using the FDL parameter input file TEMP_DATA.FDL and the analysis FDL file TEMP_DATA_ANAL.FDL. If the /OUTPUT specification was not included, this command would have created a new version of TEMP_DATA.FDL; for example, TEMP_DATA.FDL;3 would be created, if the parameter input file was TEMP_DATA.FDL;2.
| #3 |
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$EDIT/FDL/ANALYSIS=TEMP_DATA_ANAL.FDL/NOINTERACTIVE -
$_/OUTPUT=TEMP_DATA_OPT.FDL TEMP_DATA_ANAL.FDL
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This command initiates a noninteractive session in which a new optimized FDL file TEMP_DATA_OPT.FDL is generated from only the analysis FDL file. However, the analysis FDL file has to be specified in the command twice. The Edit/FDL utility will retrieve the data from the analysis sections using the /ANALYSIS file specification and the data from the FDL definition sections using the parameter input file specification. While the /ANALYSIS specification has to contain FDL analysis sections, the parameter specification does not have to, and if it does, they will be ignored.
This qualifier allows you to specify the number of keys in your indexed file.
/NUMBER_KEYS n
n
Indicates how many keys you want to define for your indexed file. You can define up to 255 keys. The default is 1 key.
$ EDIT/FDL/NUMBER_KEYS=3 TEMP_DATA
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This command begins an interactive session in which the default value for the number of keys in an indexed file is changed from 1 key to 3 keys. TEMP_DATA is the name of the FDL file to be created.
This qualifier specifies the FDL file in which to place the definition from the current session.
/OUTPUT [=fdl-filespec]
fdl-filespec
Specifies the output FDL file.
If you omit the /OUTPUT qualifier, the output FDL file will have the same name and file type as the input file, with a version number that is one higher than the highest existing version of the file.The default file type is .FDL.
$ EDIT/FDL/OUTPUT=NEWINDEX INDEX
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Begins a session in which the contents of INDEX.FDL are read into the FDL editor and can then be modified. NEWINDEX.FDL is created; INDEX.FDL is not changed.
Specifies the level of prompting to be used during the terminal session.
/PROMPTING prompt-option
prompt-option
Specifies the level of menu prompting to be used during the terminal session, BRIEF or FULL.
BRIEF Selects a terse level of prompting. FULL Provides more information about each menu question. By default, the Edit/FDL utility chooses either BRIEF or FULL, depending on the terminal type and the line speed. High-speed CRT terminals are set to FULL; nonscope terminals and terminals operating at less than 2400 baud are set to BRIEF.
If the Edit/FDL utility has to repeat a question, it repeats the FULL version of the question, with a BRIEF form of the HELP text. You can also type a question mark (?) for help on a particular question.
The extra line of HELP text is not given for menu questions.
$ EDIT/FDL/PROMPTING=BRIEF TEMP_DATA
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This command begins an interactive session in which the value of the prompting level for the Edit/FDL utility menus is set to BRIEF.
This qualifier allows you to select how you want to respond to script questions.
/RESPONSES response-option
response-option
Specifies the type of script response you want to use, AUTOMATIC or MANUAL.
AUTOMATIC Indicates that you want all script default responses to be used automatically. This option speeds the progress of the question and answer session. Once you have entered the design phase, you can modify most of the answers you took by default. MANUAL Indicates that you want to provide all script responses. If you use the SET RESPONSES command during the interactive session, the default is AUTOMATIC; otherwise the default is MANUAL.
$ EDIT/FDL/RESPONSES=MANUAL TEMP_DATA
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This command begins an interactive session in which the type of script response is MANUAL.
This qualifier controls whether the Edit/FDL utility begins the session by asking a logically grouped sequence of questions to aid you in creating the FDL file.
/SCRIPT script-title
script-title
This qualifier specifies a script title. The valid options are as follows:
ADD_KEY Allows you to model or add to the attributes of a new index. DELETE_KEY Allows you to remove attributes from the highest index of your file. INDEXED Begins a dialogue in which you are prompted for information about the indexed data file to be created from the FDL file. The Edit/FDL utility supplies values for certain attributes. OPTIMIZE Requires that you use the analysis information from an FDL file that was created with the Analyze/RMS_File utility (ANALYZE/RMS_FILE). The FDL file itself is one of the inputs to the Edit/FDL utility (EDIT/FDL). In other words, you can tune the parameters of all your indexes using the file statistics gathered from a file analysis. RELATIVE Begins a dialogue in which you are prompted for information about the relative data file to be created from the FDL file. The Edit/FDL utility supplies values for certain attributes. SEQUENTIAL Begins a dialogue in which you are prompted for information about the sequential data file to be created from the FDL file. The Edit/FDL utility supplies values for certain attributes. TOUCHUP Begins a dialogue in which you are prompted for information about the changes you want to make to an existing index.
The default is not to invoke a script automatically. Note that, if you specify /NOSCRIPT, you can still use the scripts by entering the INVOKE command in response to the main editor function prompt.
$ EDIT/FDL/SCRIPT=INDEXED TEMP_DATA
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This command begins an interactive session in which both the main menu and the script menu are bypassed. Instead, the Indexed script is generated immediately.
| #1 |
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$ EDIT/FDL INDEX
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This command begins an interactive session that will modify an FDL file named INDEX.FDL.
| #2 |
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$ EDIT/FDL/ANALYSIS=INDEXFILE/SCRIPT=OPTIMIZE MAKEINDEX
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This command uses the analysis information in the file INDEXFILE.FDL to create a more efficient MAKEINDEX.FDL file. The sequence of events is as follows:
- The FDL file MAKEINDEX.FDL is created by the Edit/FDL utility.
- INDEXFILE.DAT is created by the CREATE/FDL=MAKEINDEX command.
- INDEXFILE.DAT is used in applications.
- INDEXFILE.FDL is created with the ANALYZE/RMS_FILE/FDL command.
- The following command uses INDEXFILE.FDL to optimize MAKEINDEX.FDL:
$ CONVERT/FDL=MAKEINDEX INDEXFILE.DAT INDEXFILE.DAT
| #3 |
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$ EDIT/FDL/NOINT/A=INVENTORY/G=4
File: SALES
$
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This command creates the output FDL file SALES from the analysis FDL file INVENTORY without an interactive terminal dialogue. In addition, the Edit/FDL utility optimizes the input file, changing the granularity factor to 4 areas and the number of keys to 2. Otherwise, all the defaults supplied by the Edit/FDL utility are used.
The Edit/FDL utility commands are used during the interactive session only. The Edit/FDL utility prompts for one of the following commands at the start of your interactive session:
However, because the Edit/FDL utility is not command oriented but menu oriented, the prompt may change during the interactive session to fit the needs of the menu questions. In general, the prompt consists of a short question, the type of required value or the range of acceptable values (in parentheses), and the default answer (in brackets), as follows:
question (keyword or range)[default] : answer
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In addition, some prompts consist of a short question, a list or a range of acceptable values (either in parentheses or in a table), the required type of the value (in parentheses), and the default answer (in brackets), as follows:
question (list of values) (keyword or range)[default] : answer
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If no default is allowed, you see the symbol [-], in which case you
must supply an answer.
ADD
This command allows you to add one or more lines to the FDL file. If the line already exists, you can optionally replace it with the new line. After you insert a line, you can optionally continue to add lines under that particular primary section. If no primary section exists to hold the secondary attribute being added, one is automatically created.
ADD
Main Editor Function (Keyword)[Help] : ADD
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This command allows you to add lines to your existing FDL file. When you enter the ADD command, the Edit/FDL utility prompts you with the following menu.
Legal Primary Attributes ACCESS attributes set the run-time access mode of the file AREA x attributes define the characteristics of file area x CONNECT attributes set various RMS run-time options DATE attributes set the date parameters of the file FILE attributes affect the entire RMS data file JOURNAL attributes set the journaling parameters of the file KEY y attributes define the characteristics of key y RECORD attributes set the non-key aspects of each record SHARING attributes set the run-time sharing mode of the file SYSTEM attributes document operating system-specific items TITLE is the header line for the FDL file Enter desired primary (Keyword)[FILE] :After you enter the name of the primary attribute, the Edit/FDL utility provides another menu showing all the secondary attributes for the primary attribute and asks which secondary attribute value you want to change.
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