Hp XP P9500 Storage User Manual Page 83

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average efficiency is calculated based on very different duration (short and long) periods
information obtained in the past cycles.
Unlike Period mode, which usually has a longer monitor cycle time, Continuous mode can
effectively manage workload and tiers using a short or long duration cycle. Note that the
shorter monitor cycles tend to be more responsive to relocating new workloads.
When the monitoring mode is set to Continuous, the following values that appear in the Remote
Web Console window and in RAID Manager use the monitor value on which the weighted
calculation is performed.
Performance utilization of each tier.
Tier range values.
Frequency distribution of each pool and THP V-VOL.
These calculated values are the predictive values for the next cycle after successfully relocating
all pages. Therefore, these values may differ from an actual monitoring result when they
appear.
If you switch the monitoring mode from Period to Continuous or from Continuous to Period,
the current cycle’s monitoring data that is being collected is not discarded. However, the data
calculated by using past monitor cycle information on which the weighted calculation is done
will be reset.
Switching from Continuous to Period mode therefore resets all the historical trend information
zero.
Monitor status
Performance Monitor has two types of status parameters: monitor operation status and monitor
information status.
Monitor operation status (STS). The monitor operation status indicates whether monitoring is
operating or stopped.
STP: Monitor is stopped.
MON: Monitor is operating.
Monitor information status (DAT). The monitor information status indicates whether monitoring
information is invalid, calculating (monitor data is being summarized, and the tier range is
being calculated), or valid (when the summarization of monitor data and calculation of the
tier range have finished, and relocation is available).
VAL: Valid
INV: Invalid
PND: Calculating
Notes on performing monitoring
You can collect a new cycle of monitoring data while performing relocation.
After monitoring stops, the tier range is automatically calculated.
The latest available monitoring information is used for relocation processing.
When relocation is performed, the status of the monitor information must be valid (VAL).
Downloading the tier relocation log file
You can download the log file that contains the results of the tier relocation. See Tier relocation
log file contents” (page 84) for information about the contents of the log.
1. In the Storage Systems tree, select Pool.
Smart Tiers 83
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