Tandem Capacity Model (TCM) Manual

screen is used as input for the TCM Performance model described in Chapter 6: “Creating a
Performance Model”.
Unlike the Workload Apportionment screens that show CPU, disk read, and disk write information
on separate screens, the Workload Summary screen displays all the information on one screen.
Figure 38 (page 114) shows a sample Workload Summary screen.
Figure 38 Workload Summary Screen
Significant Rows
1. CPU Config—Not directly modifiable
CPU Config is the name of the actual CPU and the HP product version that was measured for
the sample, as determined by MeasTCM on the NonStop host system, such as NSR-GG06
with NA for IPU count. Valid CPU types are listed on the CPU conversion factor screen in the
TCM Performance Model.
2. Disk Config—Not directly modifiable
Disk Config is the actual disk configuration that was measured for the sample, as determined
by MeasTCM on the NonStop host system. The configuration includes the number of logical
disk volumes, their configuration type, their write cache (WCE) configuration status and TMF
audit trail count. Valid disk write cache configuration status can be:
WCE enabled for disks that support WCEEnabled
WCE disabled for disks that support WCEDisabled
NA for disks that do not support WCENA
The WA model assigns an Aud disk configuration type if there are any audited transactions.
If none are audited and the number of logical and physical disks are equal, it assigns an
Unmirr disk type. Otherwise, the WA model assigns an Unaud disk type.
Significant Columns
3. #Txns per Task
The #Txns per Task column shows the number of transactions per task. This parameter applies
to batch transactions only. For OLTP transactions, this parameter is always 1.
4. Mix
The Mix column shows the transaction mix in percentage for the sample used.
114 Workload Apportionment Model