Tandem Capacity Model (TCM) Manual

custom folder
A folder where the performance data samples, custom models, and sample models for the
application or set of applications under study reside. It is recommended that a different custom
folder be established for each set of applications under study.
Disk Factors
A screen used to view disk model number, rotational speed (rpm), and controller.
distribution folder
The folder where the TCM distribution files are located.
Distribution model
The set of template files distributed with TCM and installed by the user. TCM custom models are
constructed using the Distribution model. The Distribution model is composed of the Distribution
WA model and the Distribution Performance model located in the distribution folder.
Expert
A feature that enables you to generate a workload apportionment weights table without detailed
knowledge of your applications. The Expert menu provides five options: generate Expert
apportionment weights, update history with selected CSV samples, create default transaction count
table, pick the best CSV sample, and view or modify Expert parameters.
MeasTCM
The interface between Measure on the NonStop host system and the capacity planning tool TCM
on the PC. MeasTCM runs under TACL on the NonStop host system, summarizes the performance
data collected by Measure, and formats this data for use by TCM.
MeasTCM control file
The MeasTCM file that defines the criteria for summarizing Measure processes into process
categories. Process category information is translated into transaction-oriented performance
information by TCM.
Measure
A performance monitoring product that runs on the operating system. You can use Measure to
collect and examine system performance data.
model
A group of files (typically in a custom folder) that contains a list of transaction names for a given
application, CPU seconds, disk seconds, and transactions per second for each named transaction.
model set
A group of WA models that use the same Apportionment Weights table and Transaction Count
table but have different CSV data.
native mode
See “TNS-R native mode” (page 255).
254 Glossary