2. PERFORMANCE REPORTING ANALYSIS › 2.4 I/O Configuration Analysis › 2.4.3 Shared DASD Analysis Inquiry › 2.4.3.4 Component Operation › 2.4.3.4.3 Global Data Selection Panel

2.4.3.4.3 Global Data Selection Panel

If you enter Y (yes) in the Specify global data selection
exit field, the Global Data Selection Panel, which is shown
in Figure 2-93, is displayed. This panel allows you to enter
SAS statements that will perform special data selection
functions in addition to the normal DATE/HOUR/ZONE option on
the main inquiry panel.

/--------------------------------  SAS Statements  -------------------------------\
| Command ===>                                                  Scroll ===> CSR   |
|                                                                                 |
| Inquiry Step:  IOA Shared DASD Analysis                                         |
|                                                                                 |
| Line Cmds: I Insert  D Delete  R Repeat  M Move  C Copy                         |
|                                                                                 |
| Cmd  SAS Statements for:  Specifying global data selection                      |
|  -   ------------------------------------------------------------------------   |
|  _ - %MACRO SELECT;                                                             |
|  _ - IF SYSID='SYSA' THEN DO;                                                   |
|  _ -   IF VOLSER='SYSRES' THEN VOLSER='SYSAAA';                                 |
|  _ - END;                                                                       |
|  _ - IF SYSID='SYSB' THEN DO;                                                   |
|  _ -   IF VOLSER='SYSRES' THEN VOLSER='SYSBBB';                                 |
|  _ - END;                                                                       |
|  _   ________________________________________________________________________   |
|  _   ________________________________________________________________________   |
|  _   ________________________________________________________________________   |
|  _   ________________________________________________________________________   |
|  _ - %MEND SELECT;                                                              |
| ****************************** BOTTOM OF DATA  ******************************** |
|                                                                                 |
\-------------------------------------------------------------------------------/

 Figure 2-93.  Case Study - IOA Shared DASD Analysis Report Global Data Selection Panel


To illustrate the use of this option, consider an
installation that is comprised of two processors, SYSA and
SYSB.  Although most of the volume serial numbers in the
installation are unique, the system resident volumes of each
of the systems are named SYSRES.  To prevent the I/O Shared
DASD Analysis inquiry from assuming that the two unique
SYSRES packs are only one shared volume, you would code this
Global Data Solution Exit shown in Figure 2-93.

Unless you specify the SELECT MACRO, the assumptions made by
the I/O Analysis routines may produce invalid results.