View Tier Properties window

This window shows tier properties and a performance graph:

For pools

For V-VOLs

When the pool name (pool ID) appears in the graph banner, you are looking a pool information. When the LDEV name (LDEV ID) appears in the graph banner, you are looking at V-VOL information.

For pools

The following tables list the View Tier Properties information.

When selecting Entire Pool or Tiering Policy


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.

Item

Description

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.

Tier Properties table


Item	Description
Pool Name(ID)	Displays the pool name and identifier.
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 pool used. As for the pool using pool-VOLs assigned from the accelerated compression-enabled parity groups, the writable capacity may be smaller than the capacity which is displayed. 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 is also updated 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 is displayed when you make a Tiering Policy selection.
Physical Capacity	This item appears when Entire Pool is selected. In the tier 1 of the pool-VOL that supports accelerated compression, the total capacity of writable data appears. Hyphens are displayed in the Tier 2 column, the Tier 3 column, and Total column. Total: Displays the total capacity of Tier 1. Used [Used%]: Displays the used capacity and percentage of 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 the percentages for each tier, and an entire pool, for the period from the creation of the pool to the current state. This item appears when selecting Entire Pool. The number of I/Os is initialized in the following cases, and then I/Os are counted again: When monitoring information collection is complete. When the number of tiers in a pool changes. When a tier location of the pool VOL is changed 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 Performance monitoring or tier relocation conditions.

Recent Tier Utilization (monitoring period) table


Item	Description
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.
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 item appears when selecting the Entire Pool option.*
* 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


Item	Description
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, average I/Os, and total I/Os appear if the cursor is placed on the dot of the Tier1, Tier2, Tier3, Pool, or the Pool(Weighted average).

The lower value of the average I/Os appears if the cursor is placed on the dot of the Tier1 Range or the Tier2 Range.

The following table describes these items.


Item	Description
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 can 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.

When no I/Os are in the lower tier with multiple tiers, the tier range line is placed at 0 on the vertical scale.

For example, if the dot is placed far from the lower limit of the tier range, the lower limit levels of the Tier 1 Range and Tier 2 Range are adjusted to improve the visibility of the performance graph. In this case, the value that is obtained by Command Control Interface can not correspond with the value of the dot displayed in a performance graph.

For V-VOLs

The following table provides the View Tier Properties table information when LDEV information is present.

Tier Properties table when selecting a DP-VOL


Item	Description
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 identifier.
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 can 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 the percentages for each tier, and an entire pool, for the period from the creation of the pool to the current state. This item appears when selecting Entire Pool. The number of I/Os is initialized in the following cases, and then I/Os are counted again: When monitoring information collection is complete. When the number of tiers in a pool changes. When a tier location of the pool VOL is changed 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 Performance monitoring or tier relocation conditions.

Recent Tier Utilization (monitoring period) table


Item	Description
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)	Actual: 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


Item	Description
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, average I/Os, and total I/Os appear if the cursor is placed on the dot of the Tier1, Tier2, Tier3, Volume or the Volume(Weighted average).

The lower value of the average I/Os appears if the cursor is placed on the dot of the Tier1 Range or the Tier2 Range.

The following table describes these items.


Item	Description
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 can 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.

When no I/Os are in the lower tier with multiple tiers, the tier range line is placed at 0 on the vertical scale.