Tandem Capacity Model (TCM) Manual

Significant Rows
1. Application—Not directly Modifiable
Application is the user-defined name of the application as it appears in the associated WA
model.
2. Sample File—Not directly Modifiable
Sample File is the file name of the associated WA model.
3. Sample Date—Not directly Modifiable
Is the creation date of the input file which used to work with the performance model.
4. Planning Unit—Modifiable by the user
Planning unit is the unit of transaction rate.
In some cases, you will want to use a larger throughput unit than the TCM default of transactions
per second. The value in the Planning Unit field can be Second, Minute, Hour, Day, or Month.
If you enter Day, for example, all Performance model throughputs appear as transactions per
day. The axis on the charts (see “Planning Timeline Model Chart” (page 162)) are also adjusted
to reflect the new unit. An error message appears in a nearby field if an incorrect planning
unit is entered.
5. Apportionment—Not directly Modifiable
Apportionment is the name of the apportionment method used in the associated WA model.
6. CPUs—Modifiable by the TCM administrator
This row lists the number and type of the CPUs in the sample. For a list of valid CPUs, refer
the CPU Factors screen. (See Figure 49 (page 151).)
7. SW Release—Modifiable by the TCM administrator
SW Release is a changing in RVU number. Whenever the TCM administrator or super user
modifies the CPU type, the value of SW Release is automatically set to the latest intended RVU
for which this CPU type is supported in the CPU Factors screen.
8. Disks—Modifiable by the TCM administrator
Disks is the number of disks.
9. Disk Config—Modifiable by the TCM administrator
Disk Config is the number and configuration type for all logical disk volumes in the sample.
A list of valid disk configuration types is shown on the TCM Parameters Screen. (See Figure 48
(page 150).)
10. TMF Audit Trails—Modifiable by the TCM administrator
TMF audit trails depict the number of audit trails used in the sample. The value for the TMF
audit trail can be between 1 and 16 for audit disk configuration. For unaudited disk
configuration, it is not applicable.
11. Disk Write Cache—Modifiable by the TCM administrator
Disk Write Cache specifies if the write cache enable (WCE) option is ENABLED or DISABLED.
For disks that support WCE, the default value is DISABLED. For disks that do not support WCE,
this field is NA (not applicable).
12. Physical Disks—Not directly modifiable
Physical Disks is number of physical disks in the system.
Capacity Baseline—Actual Screen 139