HP XP Array Manager Software - Manual (Page 183)

• Top 10: Pools with the Highest Used %
Check on a regular basis for THP/Smart pools with a high capacity usage rate to determine THP/
Smart pools that need pool expansion or data migration.
• Top 10: Pools with the Highest Subscription
Check on a regular basis for THP/Smart pools with a high reservation rate to determine THP/
Smart pools that need pool expansion or data migration on a regular basis.
• Top 10: Tiers with the Highest Performance Utilization
Check on a regular basis for hardware tier configurations with high ratio of actual I/O operations
to the calculated maximum number of I/O operations. Used to determine Smart pools that include
hardware tier configurations with saturated performance.
The information displayed when each THP/Smart pool is selected is as follows:
• Summary
Summarizes information in a list, such as the total capacity and usage of THP/Smart pools, and
the reservation rate. Based on this information, you can review the usage status of the THP/Smart
pool.
In addition, you can determine whether you need to add capacity to the THP/Smart pool by se-
lecting Show Trend Chart from the Actions menu, and then checking each pool's trends in the in-
crease of IOPS and in capacity usage. You can change the display period of the trend chart as
needed, or save the trend chart as a report after exporting it to a CSV file.
If a Smart pool is selected, the following information can also be viewed:
• Tier Summary
Check information such as drive type, drive rotational speed, and capacity usage rate for each
hardware tier. Based on this information, you can review the usage status of hardware tiers. Note
that this summary only appears for Smart pools.
• Capacity & Performance Utilization
Check the total capacity and used capacity of the Smart pools for each hardware tier. This lets
you confirm whether the Smart pool has the necessary capacity and identifies which hardware
tier needs more capacity added to it. This summary only appears for Smart pools. For example,
if capacity is increasing, but IOPS shows little change, then adding more capacity for future use
is suggested with this capacity added to Tier 2 or Tier 3. If capacity shows little change, but IOPS
is increasing, then adding more capacity for future use is suggested with this capacity added to
the upper tiers (Tier 1 and Tier 2), or reducing Tier 3 by the amount needed. If both capacity and
IOPS are increasing, then adding more capacity for future use is necessary. You can determine
to which tiers this capacity is added based on the trend graph and distribution chart for each tier.
• Capacity & Performance Trend Chart
Check the trend chart, which combines and displays the capacity usage and performance inform-
ation for each hardware tier. Based on this information, you can determine whether the hardware
tier configuration in the Smart pool is appropriate, and which hardware tiers need additional
capacity. You can change the display period of the trend chart as needed, or save the trend chart
as a report after exporting it to a CSV file.
• Capacity Utilization
Check the total capacity and used capacity of the Smart pools for each hardware tier. Based on
this information, you can check whether the Smart pool has the necessary capacity. You need to
perform capacity planning for pools in which the remaining capacity is small. Look at the trends
for how pool contents increase, and estimate when you must increase capacity, and possibly add
additional media.
• Performance Utilization
User Guide 183