IBM TotalStorage DS6000 Series: Performance Monitoring and Tuning

94 IBM TotalStorage DS6000 Series: Performance Monitoring and Tuning

Figure 4-8 Merge Result

4.1.5 Disk Magic for open systems

In this section we do an overview of the more relevant dialog panels that Disk Magic presents

when doing an open systems modeling and we discuss what information to complete in those

panels. Here we start with a disk subsystem where the workload will be moving to, in this

case a DS6000.

Hardware configuration

Figure 4-9 on page 95 shows the Disk Subsystem - DSS1 dialog window with the DS6800

disk subsystem. The General tab is used to enter hardware information like the Hardware

Type (that basically identifies the

base model machine), as well as the cache and persistent

memory size information.

Chapter 4. Planning and monitoring tools 95

Figure 4-9 Disk Subsystem open systems dialog

Interfaces panel

Figure 4-10 on page 96 shows the panel where you define the interface connections used

between the server and the disk subsystem. If Remote Copy is used, you should define the

Remote Copy function used, the connection to the Remote Copy site, and the distance

between the Primary and Secondary site. Note that the distance here is defined in kilometers.

96 IBM TotalStorage DS6000 Series: Performance Monitoring and Tuning

Figure 4-10 Interfaces panel open systems

Open Disk panel

Select Open Disk to enter the disk characteristics:

򐂰 Physical device type

– DDM capacity in GB and RPM

򐂰 RAID type

򐂰 Total capacity in GB

Open systems workload

For an open systems modeling, you need to enter the workload statistics for every open

systems server on the Open Workload panel (see Figure 4-11 on page 97). This includes the

I/O Rate or the MB/s and also the average Transfer Size in KB for each I/O. The cache

statistics can be entered by clicking Cache Statistics and the Remote Copy percentages by

clicking Remote Copy.