Dell EqualLogic PS6210XS EqualLogic Group Manager Administrator s Guide PS Ser - Page 215

NOTE: The status of the filter is listed as File filters....disabled if the ignore-filters option was set through the CLI. If the status is File filters...disabled, any filters that have been configured through the GUI (or CLI) for Access Time or Modify Time have been disabled and all files are candidates for data reduction. Specifying the ignorefilters flag enables data reduction on a container with archive data without waiting for the minimum Access Time/ Modify Time data-reduction policy. Dell recommends that you not use this setting on containers with live data. That is, you should use this setting only on containers with archive data. Data Reduction Policy A data reduction policy defines which files qualify for data reduction and what type of data reduction should be performed. The policy is based on: • Access Time - The last day that the file was open for reading. (The filter is based on the number of days and not a specific time.) • Modification Time - The last day that the file was changed. (The filter is based on the number of days and not a specific time.) • Compression - Perform file compression, in addition to deduplication. Use compression with text files to increase storage space efficiency. Compression does not increase storage space efficiency with binary files, such as audio and video files. Deduplication, which is enabled whenever data reduction is enabled, increases disk storage space utilization efficiency with both text and binary files. Modify Container Data Reduction Policy 1. Click NAS, expand NAS Clusters and Local Containers, and then select the NAS container name. 2. In the Activities panel, click Modify settings to open the dialog box. 3. Click the Data Reduction tab. 4. Select the Enable data reduction checkbox. 5. Click the Modify policy button. 6. (Optional) To perform compression as well as deduplication, select the Enable compression checkbox. 7. To change the access time required for data reduction, enter a new value in Access Time. After modifying the access time, click the Save icon to save the changes. The access time is the minimum number of days that must pass since the file was last accessed before the file is eligible for data reduction. This value must be in the range of 30 to 365 days if compression is enabled. If compression is disabled, the range is 5 to 365 days. By default, this value is 30 days. 8. To change the modification time required for data reduction, enter a new value in Modify Time. After modifying the modify time, click the Save icon to save the changes. The modify time is the minimum number of days that must pass since the file was last modified before the file is eligible for data reduction. This value must be in the range of 30 to 365 days if compression is enabled. If compression is disabled, the range is 5 to 365 days. By default, this value is 30 days. 9. Click OK. NOTE: The status of the filter is listed as File filters....disabled if the ignore-filters option was set through the CLI. If the status is File filters...disabled, any filters that have been configured through the GUI (or CLI) for Access Time or Modify Time have been disabled and all files are candidates for data reduction. Specifying the ignorefilters flag enables data reduction on a container with archive data without waiting for the minimum Access Time/ Modify Time data-reduction policy. Dell recommends that you not use this setting on containers with live data. That is, you should use this setting only on containers with archive data. Modify Default Data Reduction Policy The default data reduction policy sets the access time and modify time values that are used by default when you enable data reduction on a container. To modify the default data reduction policy: 1. Click Group, expand Group Configuration, and select a NAS cluster. 2. Click the Data Reduction tab. 3. Modify the settings on the Default Data Reduction Policy panel as needed: • In Access Time, enter a value. After modifying the access time, click the Save icon to save the changes. The access time is the minimum number of days that must pass since the file was last accessed before the file is eligible for data reduction. NAS Container Operations 215