Install Guide

28 Best Practices for Sharing an iSCSI SAN Infrastructure with Dell PS Series and SC Series Storage using VMware vSphere
Hosts | 2015-A-BP-INF
6.2.2 I/O performance results and analysis: dedicated hosts
Performance analysis in the dedicated host environment is designed to show the impact to the PS Series
storage environment when a dedicated SC Series storage environment is added to the same iSCSI
infrastructure.
Figure 6 below shows the baseline IOPS and latency information gathered on the PS Series environment on
the left side. The right side shows the PS Series environment IOPS and latency, as a percentage of the
baseline, with the same workload running on the SC Series environment that shares the iSCSI infrastructure.
This chart shows no significant decrease in IOPS nor increase in latency when SC Series storage
environment shares the iSCSI infrastructure.
Dedicated host performance data
6.3 High availability testing
High availability was demonstrated by showing performance during an iSCSI switch failure. In this test
scenario, both VMware vSphere servers were connected to both PS Series and SC Series storage platforms.
The workload VMs, one on each vSphere server, each had eight virtual disks on each storage platform.
80%
85%
90%
95%
100%
105%
PS Series — dedicated iSCSI SAN PS Series and SC Series — shared iSCSI SAN
8K random IOPS 64K random IOPS 8K random latency 64K random latency
256K sequential read IOPS 256K sequential write IOPS 256K sequential read latency 256K sequential write latency