Flow Map Manual

Understanding the Flow Map Host Components
Flow Map Host
3–2 098935 Tandem Computers Incorporated
Database Object FMH combines performance counters from the FILE (type 3) and DISKFILE Measure
entities into a single Database object. To create a Database object, first Measure FILE
entities with the same name are added, and then the counters from all related
DISKFILE entities are included. The relationship between FILE and DISKFILE entities
is automatically formed using the file label data collected by TPDC. All partitions and
alternate key files (DISKFILEs) that form a logical file are combined with their related
FILE entities. All objects, even grouped ones, contain aggregate counters from
selected Measure entities.
Object Types
A FILE Group object is the aggregate of one or more FILE objects grouped by your
own criteria. This grouping typically represents the database for a given application.
A FILE object is based on counters from two TPDC entity types. The first is FILE
(type 3), the sum of all FILEs with the same name. The second is DISKFILE, the sum of
all associated DISKFILE entities owned by the logical file. A logical file is a Flow Map
group of all partitions and altkey files. The FILE object is the sum of all the activity
from all opener processes to the same logical disk file.
A DISKFILE object is an individual physical file or file partition and contains only
counters from the TPDC DISKFILE entity. Other counters are shown, but they are
always zero. This is so all database objects conform to the same set of counters.
Object Names All objects are assigned names. Group names are user-defined and each group name
is unique. The names are formed as follows for all other objects:
Object Name Example
Program object filename/volume.subvol MAINOBJ/$JOBS.ACCOUNTS
Named PROCESS object name-cpu number.pin $BROK1-6.35
Unnamed PROCESS object cpu number.pin 4.134
FILE object filename/volume.subvol DATAFILE/$DATA.ACCOUNTS
DISKFILE object D: filename/volume.subvol D:DATAFILE/$DATA.ACCOUNTS
The D: prefix distinguishes a DISKFILE object from its parent file object that might
otherwise have the same name.
The “filename” portion of some names is placed first. This makes it easier to identify
the object when it is displayed on the PC.
Hierarchy of Objects Generated objects are stored and related to each other in a strict hierarchy. A
PROCESS Group owns Programs, and Programs own PROCESSes. A FILE Group
owns FILEs, and FILEs own DISKFILEs.