Create Storage Template - File system DST Policy panel options - for selecting the storage template

Article:HOWTO64858  |  Created: 2012-01-04  |  Updated: 2012-08-24  |  Article URL http://www.symantec.com/docs/HOWTO64858
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Create Storage Template - File system DST Policy panel options - for selecting the storage template

This topic applies to Veritas Storage Foundation Add-on for Storage Provisioning 4.1.

Use this wizard panel to select the storage template file system DST policy, upon creation or update of the storage template. The DST Policy option lets you move data from one volume to another volume on the same file system, based on certain conditions defined in the DST policy selected.

After you select the file system(s) with multiple volumes from the left navigation tree, you have to use the DST Policy tab to perform the following:

Table: File system DST Policy options

Field

Description

Volume set name prefix

Enter the volume set name prefix.

Select Policy

Select a policy from 3 predefined policies available, which are:

  • ssd_dbdata_and_index_template - This template can be used by DST for setting up databases in the context of SSD storage. This template assumes a common practice of keeping logs (undo and temp files) in one file system and data (data and index files) on a different file system. This template can be used for file system hosting the data (data and index files) of the database. The policy has two tiers 'tier1' and a 'tier2' It proposes two RULEs. The first one for the index files is based on ACCESSTEMP and the second one for the remaining files including data files, based on IOTEMP. The first RULE can be eliminated, should one decide to place all the files including indices based on IOTEMP itself. You can use ssd_dblog_and_tmp_template.xml for your file system that stores database log and temp files. The tier1 can be out of ssds and the tier2 will be out of other storage.

  • ssd_dblog_and_tmp_template - This template can be used by DST for setting up databases in the context of SSD storage. This template assumes a common practice of keeping logs (undo and temp files) in one file system and data (data and index files) on a different file system. This template can be used for file system hosting the logs (undo and temp files) of the database. The policy relocates database logs to tier1 storage for faster access. You can use ssd_dbdata_and_index_template.xml for your file system that stores database data and index files. Appropriate modifications in below SELECT is required to specify the names of logs/temp files and/or their DIRECTORY locations. Also note that this policy covers only the specific files in the SELECT. If the placement of another files on the same file system is desired, another RULE could be added with SELECT's PATTERN of * to cover rest of the files. The tier1 can be staged on SSD storage and the tier2 can be staged on other storage.

  • ssd_read_intensive_template - The policy has two tiers 'tier1' and a 'tier2'. This policy could be used for any file system in the context of SSD storage. This policy tries to reduce the SSD worn-out by placing read intensive files on SSD storage while evacuating write intensive files from there. The tier1 can be staged on ssd storage and the tier2 can be staged on other storage.

Enforcement Schedule

Enforce a schedule for the DST policy, which can be:

  • Daily - Specify the time.

  • Weekly - Specify the day of the week and time.

  • Monthly - Specify the day of the month and time.

Maximum enforcement time(hour)

Set a maximum enforcement time in hours.

Volume Tags

Set the tag for each volume, such as tier1, tier2.

See Creating a storage template using VxFS file systems using Veritas Storage Foundation Add-on for Storage Provisioning 4.1.

See Creating a storage template using volumes using Veritas Storage Foundation Add-on for Storage Provisioning 4.1.

See Updating a storage template using Veritas Storage Foundation Add-on for Storage Provisioning 4.1.


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