Extreme Cache
Overview
This function displays the following Extreme Cache information.
The Extreme Cache setting (enabled or disabled)
Extreme Cache capacity of each CE
Setting contents of the tuning parameters
This function is supported in the ETERNUS DX500 S5/DX600 S5/DX900 S5 and the ETERNUS DX8900 S4.
User Privileges
Availability of Executions in the Default Role
Default role | Availability of executions |
---|---|
Monitor | |
Admin | |
StorageAdmin | |
AccountAdmin | |
SecurityAdmin | |
Maintainer |
Refer to "User Roles and Policies" for details on the policies and roles.
Display Contents
![](../images/SystemExtremeCache.png)
Extreme Cache Information
Item | Description |
---|---|
Mode |
Whether the Extreme Cache for the storage system is enabled or disabled is displayed. |
Usage |
The usage of the Extreme Cache (Read-Only Cache) is displayed. This item is not displayed if "Mode" is "Disable". |
Extreme Cache Detail Information
The following items are only displayed when "Mode" is "Enable".
Item | Description |
---|---|
Owner |
All the CEs in the storage system are displayed. |
Status |
The status of the PFM in the relevant CE is displayed. After PFMs are installed, if the Extreme Cache capacity is not specified, a "-" (hyphen) is displayed.
|
Capacity |
The total capacity (TB) that can be used as Extreme Cache in the PFM installed in the relevant CE is displayed. After PFMs are installed, if the Extreme Cache capacity is not specified, "0.0 TB" is displayed. |
Extreme Cache Tuning Parameter Information
The following items are only displayed when "Mode" is "Enable".
Item | Description |
---|---|
Initial Caching Threshold |
The threshold (1 to 16) that affects how frequently data is stored in Extreme Cache is displayed. If the set value is exceeded, it is assumed that the relevant data is read frequently and the data is stored in Extreme Cache. This parameter specifies the threshold value that is used until the Extreme Cache memory is full after Extreme Cache is enabled. |
Caching Threshold |
The display contents vary depending on whether the cache data is relocated. If the cache data is relocated, "Caching Threshold" (1 to 16) is displayed as the threshold after the Extreme Cache memory is full. If "Caching Threshold" is exceeded, it is assumed that the relevant data is read frequently and the data is stored in Extreme Cache. If the cache data is not relocated, "Not relocate Cache Data" is displayed. |
Caching Priority |
The concurrency (1 to 9 or 10 (Fastest)) of the staging process when data is stored in Extreme Cache is displayed. |
Monitoring I/O |
The I/O type for storing data in Extreme Cache is displayed. Read Read / Write |