Appendix K Customizing Automated Storage Tiering Configuration File

The Automated Storage Tiering configuration file has the following parameter related to Automated Storage Tiering. By changing the value of the parameter, you can customize the behavior of Automated Storage Tiering.

Parameter Name	Explanation
MAXMEMORY	The maximum value of the memory capacity that is to be used by Automated Storage Tiering. To expand the total value of the Tier pool used capacity that can be evaluated in the same time period as the access status data, increase the value of this parameter.

File Name and Stored Location

The name of the Automated Storage Tiering configuration file is "ast.properties". This file is stored in the following directory.

OS Type of Management Server	Absolute Path Name
Windows	$INS_DIR\AST\Manager\etc\opt\FJSVssast\data\properties\ast.properties ($INS_DIR is "Program Directory" specified at the ETERNUS SF Manager installation.)
Solaris, Linux	/etc/opt/FJSVssast/data/properties/ast.properties

How to Define the Parameter

MAXMEMORY

As the default value, 2,560 is set. Specify the maximum memory capacity (in megabytes) that is used by Automated Storage Tiering with an integer value of 2,560 or larger as required.

The relationship between "Evaluated Value of Memory Size Used by Automated Storage Tiering" and "Maximum Memory Size Used by Automated Storage Tiering" is as follows.

Evaluated Value of Memory Size Used by Automated Storage Tiering	Maximum Memory Size Used by Automated Storage Tiering
16 or less	2,560 MB
More than 16 and 24 or less	3,180 MB
More than 24 and 32 or less	3,800 MB
More than 32 and 40 or less	4,420 MB
More than 40 and 48 or less	5,040 MB

If an invalid value is specified, it is regarded the same as if 2,560 is specified. As a result, the evaluated value of the memory size that is used by Automated Storage Tiering becomes 16.

Example

The following is a specification example where the "Maximum Memory Size Used by Automated Storage Tiering" is changed to 3,180 MB when the "Evaluated Value of Memory Size Used by Automated Storage Tiering" is 24.

MAXMEMORY=3180

How to Reflect the Configuration File

The procedure to reflect the contents of the Automated Storage Tiering configuration file to this product is as follows:

In Web Console, open Overview of Automated Storage Tiering that is related to the storage system where the Tier pool exists for performing Automated Storage Tiering and check that "Reallocating" and "Waiting" are not displayed in Status column.
Execute the following command to stop ETERNUS SF Manager.
- For Windows
```
> $INS_DIR\Common\bin\Stop_ESFservice.bat
```
  $INS_DIR is "Program Directory" specified at the ETERNUS SF Manager installation.
- For Solaris or Linux
```
# /opt/FJSVesfcm/bin/stopesf.sh
```
Edit the Automated Storage Tiering configuration file "ast.properties".
Execute the following command to restart ETERNUS SF Manager.
- For Windows
```
> $INS_DIR\Common\bin\Start_ESFservice.bat
```
  $INS_DIR is "Program Directory" specified at the ETERNUS SF Manager installation.
- For Solaris or Linux
```
# /opt/FJSVesfcm/bin/startesf.sh
```