Tandem Capacity Model (TCM) Manual

Glossary
accelerated mode
The operational environment in which Accelerator-generated RISC instructions execute.
application
A set of processes that execute an end-user business function on an HP NonStop system. These
processes are assigned to categories, and the application is given a name in the MeasTCM control
file.
Apportionment Weights table
A table that defines the way in which process category performance data should be apportioned
to transactions. This table is created and modified only by users with a TCM administrator or
super-user authorization level.
batch transaction
A workload that processes several transactions at once. Batch transactions have the following
characteristics: long job duration, low priority, significant disk activity, little or no terminal interaction,
and work within a closed system.
Capacity Baseline
A Performance model screen that summarizes the source data for the model. It shows each defined
transaction in terms of CPU, disk read, and disk write seconds.
Capacity History
A database used to archive and organize apportionment data from the WA model. Capacity
History is organized as a Microsoft Excel database and presents information that is useful to the
capacity planner for such tasks as apportionment validation, trend analysis, and selection of
representative samples.
Category Demand report
A Workload Apportionment (WA) model report that provides a summary of the performance data
for process categories as summarized by MeasTCM on the NonStop host system.
Consumption model
A component of the Performance model used to compute the number of CPUs and disks required
to accommodate one or more user-defined targets, including target host response time; target CPU,
disk utilization or both; planned throughputs; CPU device type; and disk configuration type (such
as audited and nonaudited). The Consumption model also computes utilizations, response times,
and maximum throughput given other specified constraints.
CPU conversion factors
A set of factors that represent the relative CPU speeds assumed for the application or set of
applications in the Performance model. The Performance model uses these factors when the planned
CPU type is different from the actual CPU type.
accelerated mode 253