When you create a ILM policy, you start by selecting and arranging the ILM rules. Then, you verify the behavior of your proposed policy by simulating it against previously ingested objects. When you are satisfied that the proposed policy is functioning as intended, you can activate it to create the active policy.
When creating an ILM policy:
- Consider all of the different types of objects that might be ingested into your grid. Make sure the policy includes rules to match and place these objects as required. If no rules match an object, the policy's default rule controls where that object is placed and for how long it is retained.
- Make sure that the rules in the policy are in the correct order. After an object has been matched by a rule, none of the following rules in the policy are applied to that object.
- Keep the ILM policy as simple as possible. This avoids potentially dangerous situations where
object data is not protected as intended when changes are made to the
StorageGRID system over time.
CAUTION:
An ILM policy that has been incorrectly configured can result in unrecoverable data loss. Before activating an ILM policy, carefully review the ILM policy and its ILM rules, and then simulate the ILM policy. Always confirm that the ILM policy will work as intended.
Creating a policy consists of these main tasks: