What file-placement policies do I want?

This topic describes considerations for determining what file-placement policies you want to implement.

The SAN File System uses policy rules to determine how files are placed in the user storage pools. Each rule in a policy specifies the fileset to which the rule applies and the storage pool in which user data will be stored. In addition, it includes conditions for storing the files. These conditions are typically based on file attributes, such as file name, owner, group ID of owner, or the system creating the file.

Although defining rules for file placement based on creation time, user ID, or group is supported, use these clauses with care. When files are restored from a backup or migrated, these attributes are changed. For example, the following changes occur when files are restored from backup: You can define multiple policies for the SAN File System. However, only one policy can be active as any one time.
Important: In a non-uniform zone configuration, the clients can access only the storage pools in their zone. You must verify which filesets each client uses, and ensure that the policy rules use only storage pools that the clients can access.

Parent topic: Planning the file management strategy

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