Tandem Capacity Model (TCM) Manual

3 Using MeasTCM
MeasTCM provides the interface between Measure on the NonStop host system and TCM on your
workstation. Running under TACL on the NonStop host system, MeasTCM summarizes and
categorizes the performance data collected by Measure and formats it for use by TCM.
MeasTCM reduces Measure performance data to a manageable form for capacity planning.
Typically, MeasTCM reduces a Measure data file to just a few kilobytes—a size that contains all
the performance data required by TCM.
Features and Functions
MeasTCM does the following:
• Determines the amount of CPU and disk activity that each process category consumes and
computes the average priority of each process category.
Using the CPU, Process, DISC, and DISCOPEN entities of Measure, MeasTCM calculates the
amount of CPU and physical disk activity and the number of cache hits and misses for each
collection of processes in a category. MeasTCM then summarizes process-related and
disk-related Measure performance data into a small number of process categories.
• Summarizes performance data from multiple Measure sessions, or multiple HP nodes, or both.
MeasTCM accepts input from up to 10 Measure data files and summarizes that data into one
file for use by TCM. This feature is particularly useful for applications that span HP nodes via
HP wide area networks (WANs).
• Ensures that all sample data is allocated to the appropriate process categories in such a way
that no data is omitted or counted twice.
• Creates a CSV file or files for use by TCM that will be downloaded to the workstation.
• Documents the results of MeasTCM processing.
• From SPR T6042H01^ABD onwards, OSS pathnames are supported in the audit trail report.
MeasTCM is capable of providing OSS pathnames in the audit document instead of the OSS
file — equivalent Guardian names for those files for which OSS journals are specified.
If the measurement is taken on one system and analyzed on the other system, an OSS journal
must be present to map the OSS pathnames. Therefore, to enable the OSS journals wherever
OSS pathnames are specified, use the command START MEASUREMENT <DATAFILENAME>,
OSS. If OSS journals are not available, relevant message is displayed at the home terminal.
Components and Architecture
The major components of MeasTCM are:
• MeasTCM program
This program launches MeasTCM, which is a single COBOL85 program.
• MeasTCM control file
This file contains all the parameters of the current MeasTCM session. A template file called
CNTLFILE is provided for your customization.
The overall architecture of MeasTCM appears in Figure 4 (page 30). The diagram shows that
MeasTCM uses its control file and one or more Measure data files to create one or more CSV files
of process category for use by TCM on the workstation. CSV (comma separated values) is a
standard file format for Microsoft Excel files.
Features and Functions 29