Entire Pool or Tiering Policy

Select the following resource to display the performance graph.

• Entire Pool: Displays the performance graph of the entire pool.
• Tiering Policy: Displays the performance graph of the tiering policy.

All(0), and from Level1(1) to Level31(31)

Select the Tiering Policy.

The performance graph that corresponds to the selected tiering policy appears.

From Level 6 (6) to Level 31 (31), the names of tiering policies can be changed. If these names have changed, the new names appear.

Pool Name (ID)

Displays the pool name and ID.

Tier name

Displays the tier names: Tier1, Tier2, Tier3, and Total. Each column displays information about the tier.

Drive Type/RPM

Displays the data drive type and RPM of tier.

If multiple types exist in a tier, Mixed is displayed. For an external volume, Drive Type displays External Storage with the value of the external LDEV tier rank.

Buffer Space

Displays the following buffer spaces.

• New page assignment: Buffer spaces for new page assignment.
• Tier relocation: Buffer spaces for tier relocation.

Capacity

Displays the capacity of the pool and each tier.

• Total: displays the total capacity of each tier and a pool.

  As for the pool comprised of pool volumes assigned by the accelerated compression-enabled parity groups, the writable capacity may be smaller than the displayed capacity.

• Used [Used%]: Displays the percentage of the used capacity for the pool and each tier. The field is updated asynchronously with the Recent Tier Utilization table and when the View Tier Properties window is opened. The Used Capacity of each tier can differ from the sum of the used capacities of all tiers.

  Tiering Policy: tiering policy name: Displays the used capacity size and percentage related to the tiering-policy of the pool and each tier. This item displays when you make a Tiering Policy selection.

• Used (Pre Processed Data): Displays the data capacity before the reduction provided by the capacity saving function.

Physical Capacity

This item appears when Entire Pool is selected. In the tier 1 of containing the pool-VOL supporting accelerated compression, the capacity which is assured of the writing of data appears. Hyphens are displayed in Tier 2 column, Tier 3 column, and Total column.

• Total: Displays the total capacity of tier 1.
• Used [Used%]: Displays the used capacity and percentage of the tier 1.

Total Capacity

Displays the total capacity of each tier and total capacity of the pool.

Used Capacity (Used %)

Displays the percentage of the used capacity for the pool and each tier. The field is updated asynchronously with the Recent Tier Utilization table and when the View Tier Properties window is opened. The Used Capacity of each tier can differ from the sum of the used capacities of all tiers.

Tiering Policy: tiering policy name

Displays the used capacity size and percentage related to the tiering-policy of the pool and each tier. This item displays when you make a Tiering Policy selection.

Current Average Number of I/O(per Hour)

Displays the actual monitored average I/Os and percentages of each tier and entire pool for the period from the creating of the pool to the current state. This item appears when selecting of Entire Pool. In addition, the number of I/Os is initialized in cases of following, and then I/Os are counted again:

• When monitoring information collection is completed.

• When the number of tiers in a pool changes.
• When a tier location of the pool VOL changes by adding a pool VOL.
• When multi tier pools are enabled after being invalid.
• When the fixed monitoring information is calculated again.

  For details about cases that the fixed monitoring information is calculated again, see Tier relocation rules, restrictions, and guidelines.

Header area

If an error occurs, a message appears.

Tier name

Displays the tier names: Tier1, Tier2, Tier3, and Total. Each column displays information about the tier.

Performance Utilization

Displays the percentage of progress in performance utilization processing.

Average Number of I/Os (per Hour)

Displays the average number of I/Os in a pool and each tier.

Actual: Displays the actual monitored average I/Os and percentages for each tier and a pool on an hourly basis.* This item appears when selecting the Entire Pool option.

Target: Displays the target average I/Os and percentages for each tier and a pool after the tier determination calculation.* This item appears when selecting the Entire Pool option.

Tiering Policy: tiering policy name: Displays the average number of I/Os for the pool and each tier that are related to the tiering-policy. This item displays when you make a Tiering Policy selection.*

* This field is updated when performance monitoring information is collected, asynchronously with Used Capacity (Used %). If ? is displayed, take the actions displayed in the header area of the Recent Tier Utilization table. If an error message and countermeasure are not shown in the header area of the Recent Tier Utilization table, refresh the window. If ? continues to be displayed, call customer support.

Performance graph

Displays the performance graph of the entire pool or tiering policy.

Pool

If Entire Pool and the period mode of the monitoring mode are specified, this item appears. When this check box is selected, the performance graph appears. The vertical scale of the performance graph indicates the average number of I/Os on an hourly basis. The horizontal scale of the performance graph indicates the capacity.

If there is no monitor data, this item does not appear.

Pool(Weighted average)

If Entire Pool and the continuous mode of the monitoring mode are specified, this item appears. When this check box is selected, the performance graph appears. The vertical scale indicates the average number of I/Os on an hourly basis. The number of I/Os is a weighted, averaged with the monitoring data from the past cycle weighted against the monitoring data from the current cycle. The horizontal scale indicates the capacity.

If there is no monitor data, this item does not appear.

Policy

If Tiering Policy and the period mode of the monitoring mode are specified, this item appears. When the check box is selected, the performance graph appears. The vertical scale of the performance graph indicates the average number of I/Os on an hourly basis. The horizontal scale of the performance graph indicates the capacity.

If there is no monitor data, this item does not appear.

Policy(Weighted average)

If Tiering Policy and the continuous mode of the monitoring mode are specified, this item appears. When the check box is selected, the performance graph appears. The vertical scale of the performance graph indicates the average number of I/Os on an hourly basis. The horizontal scale of the performance graph indicates the capacity.

If there is no monitor data, this item does not appear.

Tier1

Displays the performance graph of tier1. The vertical scale indicates the average number of I/Os on an hourly basis. The horizontal scale indicates the capacity.

If there is no monitor data in tier1, this item does not appear.

Tier2

Displays the performance graph of tier2. The vertical scale indicates the average number of I/Os on an hourly basis. The horizontal scale indicates the capacity.

If there is no monitor data in tier2, this item does not appear.

Tier3

Displays the performance graph of tier3. The vertical scale indicates the average number of I/Os on an hourly basis. The horizontal scale indicates the capacity.

If there is no monitor data in tier3, this item does not appear.

Tier1 range

Displays the range in tier1.

If there is no monitor data in tier1, this item does not appear.

Tier2 range

Displays the range in tier2.

If there is no monitor data in tier2, this item does not appear.

Capacities

The capacity (GB) of the area from the dot of the maximum value on the vertical scale to a specified dot. The capacity of the dot on the vertical scale is 0.00 GB.

Average I/Os

All I/Os are sorted into 127 sections. The average I/O is the representative I/O number assigned to each section, based on the definition of the storage system. By the total number of I/Os, the number of dots may be 127 or less.

Total I/Os

The total number of I/Os in the section from the dot of the maximum value on the vertical scale to a specified dot. The total I/Os is calculated using the average I/Os and capacities in the specified section. If the specified dot is on the vertical scale, the total I/Os is zero.

LDEV ID

Displays the combination of the LDKC, CU, and LDEV.

LDEV name

Displays the LDEV name.

Tiering Policy

Displays the tiering policy name and ID.

New Page Assignment Tier

Displays the new page assigned tier.

Tier Relocation

Displays whether tier relocation is set to Enabled or Disabled.

Relocation Priority

Displays the relocation priority.

Tier name

Displays the tier names: Tier1, Tier2, Tier3, and Total. Each column displays information about the tier.

Drive Type/RPM

Displays the data drive type and RPM of tier.

If multiple types exist in a tier, Mixed is displayed. For an external volume, Drive Type displays External Storage with the value of the external LDEV tier rank.

Pool Capacity

Displays the total capacity of each tier and total capacity of the pool.

Used Capacity (Used %)

Displays the percentage of the used capacity for the pool and each tier. The field is updated asynchronously with the Recent Tier Utilization table and when the View Tier Properties window is opened. The Used Capacity of each tier might differ from the sum of the used capacities of all tiers.

Current Average Number of I/O(per Hour)

Displays the actual monitored average I/Os and percentages of each tier and entire pool for the period from the creating of the DP-VOL to the current state. In addition, the number of I/Os is initialized in cases of following, and then I/Os are counted again:

• When monitoring information collection is completed.

• When the number of tiers in a pool changes.
• When a tier location of the pool VOL changes by adding a pool VOL.
• When multi tier pools are enabled after being invalid.
• When the fixed monitoring information is calculated again.

  For details about cases that the fixed monitoring information is calculated again, see Tier relocation rules, restrictions, and guidelines.

Header area

If a error occurs, a message appears.

Tier name

Displays the tier names: Tier1, Tier2, Tier3, and Total. Each column displays information about the tier.

Average Number of I/O (per Hour)

• Displays the actual monitored average I/Os and percentages of each tier and a DP-VOL on an hourly basis.*
• Target: Displays the target average I/Os and percentages of each tier and a DP-VOL after the tier determination calculation.

* This field is updated when performance monitoring information is collected, asynchronously with Used Capacity (Used %). If ? is displayed, take the actions displayed in the header area of the Recent Tier Utilization table. If an error message and countermeasure are not shown in the header area of the Recent Tier Utilization table, refresh the window. If ? continues to display, call the customer support.

Performance graph

Displays the performance graph of the entire pool or tiering policy.

Volume

If the period mode of the monitoring mode is specified, this item appears. When this check box is selected, the performance graph appears. The vertical scale of the performance graph indicates the average number of I/Os on an hourly basis. The horizontal scale of the performance graph indicates the capacity.

If there is no monitor data, this item does not appear.

Volume(Weighted average)

If the continuous mode of the monitoring mode is specified, this item appears. When this check box is selected, the performance graph appears. The vertical scale indicates the average number of I/Os on an hourly basis. The number of I/Os is a weighted, averaged with the monitoring data from the past cycle weighted against the monitoring data from the current cycle. The horizontal scale indicates the capacity.

If there is no monitor data, this item does not appear.

Tier1

Displays the performance graph of tier1. The vertical scale indicates the average number of I/Os on an hourly basis. The horizontal scale indicates the capacity.

If there is no monitor data in tier1, this item does not appear.

Tier2

Displays the performance graph of tier2. The vertical scale indicates the average number of I/Os on an hourly basis. The horizontal scale indicates the capacity.

If there is no monitor data in tier2, this item does not appear.

Tier3

Displays the performance graph of tier3. The vertical scale indicates the average number of I/Os on an hourly basis. The horizontal scale indicates the capacity.

If there is no monitor data in tier3, this item does not appear.

Tier1 range

Displays the range in tier1.

If there is no monitor data in tier1, this item does not appear.

Tier2 range

Displays the range in tier2.

If there is no monitor data in tier2, this item does not appear.

Capacities

The capacity (GB) of the area from the dot of the maximum value on the vertical scale to a specified dot. The capacity of the dot on the vertical scale is 0.00 GB.

Average I/Os

All I/Os are sorted into 127 sections. The average I/O is the representative I/O number assigned to each section, based on the definition of the storage system. By the total number of I/Os, the number of dots may be 127 or less.

Total I/Os

The total number of I/Os in the section from the dot of the maximum value on the vertical scale to a specified dot. The total I/Os is calculated using the average I/Os and capacities in the specified section. If the specified dot is on the vertical scale, the total I/Os is zero.