The procedure to create a Tiering policy is as follows:
On the global navigation tab, click Storage.
The registered ETERNUS Disk storage systems are displayed on the Main pane.
On the Main pane, click the target ETERNUS Disk storage system.
On the Category pane, click Automated Storage Tiering.
The items of the Category pane change into the items concerning Automated Storage Tiering.
On the Category pane, click Tiering Policies.
The registered Tiering policies are displayed on the Main pane.
On the Action pane, click Create under Tiering Policies.
The information input screen is displayed.
Refer to the following table to enter the necessary information, and then click Create.
Item Name | Explanation |
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Policy Name | Specify a name (that is unique within the ETERNUS SF system) for the Tiering policy that is being created. Any alphanumeric character (1-16 characters), a hyphen (-), an underscore (_), and a pound symbol (#) may be specified. The letters to be specified are not case sensitive. |
Execution Mode | Specify the execution mode which specifies the method for operation of Automated Storage Tiering.
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Evaluation Period | Specify the evaluation range of the performance data for Automated Storage Tiering. Select a number and a unit ("Hour", "Day", or "Week"). The default setting is "1 Day". When the unit is "Hour", 2, 4, 6, 8, or 12 may be specified. The starting point of the evaluation period varies depending on the setting of Execution Mode. If Execution Mode is "Auto" or "Semi-Auto", the starting point of the evaluation period is 0:00. For example, if "6 Hour" is specified, the evaluation will be conducted from 0:00-6:00, 6:00-12:00, 12:00-18:00, and 18:00-24:00. When the selected unit is "Day", a value within the range of 1 through 31 may be specified. When the selected unit is "Week", 1 may be specified. |
Evaluation Standard | Specify the standards for the evaluation of the performance for Automated Storage Tiering. From the pull-down list, select either of the following.
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Automated Storage Tiering Execution Time | Specify the time, within the range of 0:00-23:59, to start collection, evaluation, and relocation of performance data for Automate Storage Tiering. When the unit of Evaluation Period is set to "Hour", the process will be executed at the time after the specified number of hours (2, 4, 6, 8, or 12 hours) has elapsed from 0:00. |
Automated Storage Tiering Time Limit | Specify the time to discontinue the volume relocation as elapsed time from the time specified in Automated Storage Tiering Execution Time. The default setting is "no limit" (process will not be discontinued). When the unit of Evaluation Period is "Day" or "Week", a value from 00 through 24 may be specified. |
Evaluation Day | Specify the day of the week to start evaluation of the access status data. This can be specified only when Execution Mode is set to "Auto" or "Semi-Auto" and the unit of Evaluation Period is set to "Week". When the Evaluated from initial specified day (Evaluated despite insufficient Evaluation Period) checkbox is checked, even if the evaluation period is insufficient, an evaluation will be performed using access status data that exists by the specified day of the week for the first time. Check this checkbox when it is desirable to immediately start operation of Automated Storage Tiering. The default setting for this checkbox is not checked (recommended). When this checkbox is not checked, an evaluation will not be performed on the specified day of the week for the first time, and from the next specified day of the week, evaluations will always be performed using access status data for the evaluation period. |
Days of the Week subject to Evaluation | Upon execution of relocation, specify the day of the week to collect performance data for Automated Storage Tiering that will be subject to evaluation. This can be specified only when the unit of Evaluation Period is set to "Day" or "Week". In the default setting, all days of the week are subject to evaluation. The days of the week that are checked off will be excluded from being subject to evaluation. |
Time of the Day subject to Evaluation | Specify the time of the day to collect and evaluate performance data for Automated Storage Tiering. This can be specified only when the unit of Evaluation Period is set to "Day" or "Week". The default setting is "24 Hours" (the 24 hours from 0:00 to 0:00). For both the starting time and the ending time of evaluation, a value from 0:00 to 23:00 may be specified. |
Configure Evaluation Excluded Day | Specify the day, with a calendar, to be subject to evaluation of performance data for Automated Storage Tiering. This can be specified only when the unit of Evaluation Period is set to "Day" or "Week". In the default setting, the Enable checkbox is checked on. While in this state, the date to be subject to evaluation may be specified with the calendar that is displayed by clicking Edit Evaluation Excluded Day. When the Enable checkbox is checked off, the configure of evaluation excluded day will become void. |
Data Type | Select "IOPS" from the pull-down list. |
Data Range of Layer | Specify whether to manually configure the data range of each layer or to have the system automatically configure this. In the default setting, the Automatic Configuration checkbox is checked on. When set to automatic configuration, Data Range of Low, Data Range of Middle, and Data Range of High cannot be specified. The system will automatically decide relocation standards. When the Automatic Configuration checkbox is checked off, the date range for each layer can be manually configured. |
Data Range of Low | Specify the range of the IOPS values to use as standards for location to the Low sub-pool of the Tier pool. For this item, specify a maximum value. It is also possible to input a decimal value. The minimum value is fixed at "0", and a "-" will be displayed in the Main pane of the Tiering policy. When this specification has been omitted, a "-:-" will be displayed in the Main pane of the Tiering policy. |
Data Range of Middle | Specify the range of the IOPS values to use as standards for location to the Middle sub-pool of the Tier pool. For this item, specify a minimum value and a maximum value. It is also possible to input a decimal value. When this specification has been omitted, a "-:-" will be displayed in the Main pane of the Tiering policy. |
Data Range of High | Specify the range of the IOPS values to use as standards for location to the High sub-pool of the Tier pool. For this item, specify a minimum value. It is also possible to input a decimal value. The maximum value is fixed at "2147483647", and a "-" will be displayed in the Main pane of the Tiering policies. When this specification has been omitted, a "-:-" will be displayed in the Main pane of the Tiering policy. |
Point
When operating with 2 layers, it is necessary to either specify both the 2 fields of Data Range of Low and Data Range of High, or omit the specification for both of these.
When operating with 3 layers, it is necessary to either specify all 3 fields of Data Range of Low, Data Range of Middle, and Data Range of High, or omit the specification for all of these.
Information
Tiering policies can be created by specifying only Policy Name. In such case, the following values will be configured for the other items.
Execution Mode: Auto
Evaluation Period: 1day
Evaluation Standard: Peak
Automated Storage Tiering Execution Time: 00:00
Automated Storage Tiering Time Limit: No Limit
Days of the Week subject to Evaluation: Su/Mo/Tu/We/Th/Fr/Sa (All days)
Time of the Day subject to Evaluation: 24Hours
Configure Evaluation Excluded Day: Enable
Data Type: IOPS
Data Range of Layer: The Automatic Configuration checkbox is checked on. (It is set automatically)
Data Range of Low: (Not set)
Data Range of Middle: (Not set)
Data Range of High: (Not set)
