Release Notes

16 Analyzing Dell PS Series Storage with SAN Headquarters | TR1050
Figure 8 Performance and monitoring relationships: SAN HQ monitors iSCSI SAN for PS Series groups
SAN HQ provides the resources needed to monitor and determine where bottlenecks may occur in the PS Series
infrastructure. Server resources attached to the SAN such as processor and memory consumption may be understood
using other tools such as Dell Performance Analysis Collection Kit (DPACK), Windows Perfmon, Linux iostat, or Dell’s
Foglight.
2.3 Performance analysis goals
For faster problem resolution, it is important to understand the overall goal before initiating a performance review.
Performance goal types
• Benchmark: Focuses on the common tests and the hardware differences between solutions; helps understand
the RAID configurations, virtualization differences, and disks types; and helps understand the criteria for
success.
• Diagnostics: Focuses on the context, times of complaints, or high latency.
• Planning or designing: Determines the additional load a current infrastructure may support or the appropriate
configuration for new workloads.
Performance metrics
• Input/output per second (IOPS): The measurement of actual units of work (based on I/O size) that are
processed by the subsystem. Randomness usually requires more mechanical movement in the case of spinning
disks.