HPE XP7

compare similar components of different XP and XP7 disk arrays to determine their performance and
observe trends. You can plot performance graphs of components for different metrics that belong to the
following metric categories:
Metric category Description Unit of measurement
Frontend IO Metrics Provides metrics for measuring the
I/Os from a host to the array.
IO/second
Frontend MB Metrics Provides metrics for measuring the
throughput of the I/Os from a host to
the array.
MB/second
Utilization Metrics Provides metrics for measuring the
CPU cycles of the processors that
reside on the CHAs and DKAs in
the XP disk arrays, and on the MP
Blades in the P9500/XP7 disk
arrays. In addition, this category
also provides metrics for measuring
the cache and the RAID Group
utilization in an array.
% utilization
Backend Metrics Provides metrics for measuring the
number of reads and writes on the
disks on a given array, applies to
RAID Groups and physical LDEVs.
Number of reads
Number of writes
Response Time Metrics Provides metrics for measuring the
read response time and the write
response time for the read I/O
requests and the write I/O requests
on an array.
Read response time
Write response time
The metrics that you select are component-driven, where specific set of metrics are displayed for the
selected components. Associated components are displayed for selection in the Actions menu. For
example, all the DKA pairs and their MPs, RAID Groups and associated physical LDEVs and pool LDEVs
are grouped in the backend category. You can also analyze the performance of a component by viewing
its data points collected at different collection rates in the same chart. You can compare components
across the XP and the XP7 disk arrays based on the following above categories. (Ensure that you select
every element that you want to appear in your chart, because PA graphs only those elements that are
specified).
Navigating the PA graphical user interface 27