Use the Extension tab to specify how filesystems will be extended. You can also select LOG ONLY mode for the policy. In this mode, no filesystem extension will be performed. Instead, extension actions that would have taken place are written to the log file.
Note: The actual amount of filesystem extension can vary, depending on your environment. For example, if 5GB physical partitions are set up for a volume group, its filesystems will be extended in 5GB increments. If you specified a smaller amount, it will be rounded up to the physical partition size.
As another example, software striping and software RAID will claim part of the space created when filesystems are extended. In this case, filesystem extension will appear to create less space than specified.
If you are using LUN provisioning, you can specify the size of new LUNs by using either the Preferred minimum size LUN to create option on the Provisioning tab, or one of the Amount to Extend options on the Extension tab. If you specify an Amount to Extend, 10% more space will be added to cover overhead requirements. For example, if you set up the policy to add 10Gb, an 11Gb LUN will actually be provisioned. To create a 10Gb LUN, you should specify 9Gb in the policy.
Field Name |
Description |
Add |
Enter an amount by which filesystems selected for this policy will be extended. Space can be specified in megabyte or gigabyte increments, or by a percentage of filesystem capacity. |
Make Freespace |
Enter the amount of freespace that will be maintained in the filesystems selected for this policy. If freespace falls below the amount you specify, the difference will be added. Freespace can be specified in megabyte or gigabyte increments, or by a percentage of filesystem capacity. |
Make Capacity |
Enter the amount of total capacity that will be maintained in the filesystems selected for this policy. If capacity falls below the amount you specify, the difference will be added. |
Field Name |
Description |
Filesystem Maximum Capacity |
If you chose Add or Make Freespace under Amount to Extend, you can optionally enter a maximum capacity. If a filesystem reaches the maximum size you specify, the filesystem will be removed from the policy and an alert will be triggered. |
Field Name |
Description |
Extend filesystems regardless of remaining freespace |
Select this option to extend filesystems based only on the specified policy. |
Extend Filesystems When Freespace is Less Than |
Select this option to extend a filesystem according to the specified policy only when its freespace falls below a certain size. Enter the amount of freespace that will trigger the filesystem extension. Freespace can be specified in megabyte or gigabyte increments, or by a percentage of filesystem capacity. |
Field Name |
Description |
Do Not Extend Filesystems - Log Only |
Select this option to log any actions the policy would take on its selected filesystems. No policy actions will actually be performed. This option can be used to test the results of the policy before extending any filesystems. |
For more information, see Filesystem Extension.