
198 DS8800 Performance Monitoring and Tuning
Figure 6-30 zSeries workload growth impact on response time components
In Figure 6-31, observe that the FICON host adapter started to reach the red area at 22000
I/O per second. The workload growth projection stops at 40000 I/O per second, because the
FICON host adapter reaches 100% utilization when the I/O rate is greater than 40000 I/O per
second.
Figure 6-31 zSeries workload growth impact on resource utilization
6.3 Disk Magic for Open Systems
In this section, we show how to use Disk Magic as a modeling tool for Open Systems. We
illustrate the example of merging two ESS-800s into one DS8300 system. ...