ILM rules allow you to manage the placement of object data over time. To create an ILM rule, you use the Create ILM Rule wizard.
When StorageGRID Webscale evaluates objects against an ILM rule, it looks first at the rule's basic and advanced filtering criteria. If an object matches the filtering criteria, the object is copied and placed according to the rule's placement instructions. Placement instructions determine where, when, and how object data is stored. If the rule includes more than one placement instruction, when a set time expires, the content placement instructions for the next time period are applied to objects at the next ILM evaluation time.
Option | Description |
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Ingest Time | The time when the object was ingested. |
Last Access Time | The time when the object was last retrieved (read or viewed). Note: To use this option, updates to Last Access Time must be enabled for the S3 bucket or Swift container.
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Noncurrent Time | The time an object version became noncurrent because a new version was ingested and replaced it as the current version. Note: The Noncurrent Time applies only to S3 objects in versioning-enabled buckets.
You can use this option to reduce the storage impact of versioned objects by filtering for noncurrent object versions updated with a new current version or delete marker. |
User Defined Creation Time | A time specified in user-defined metadata. |
Specifying a temporary storage pool is optional, but recommended. If the preferred storage pool is unavailable, a copy is made in the temporary storage pool. As soon as the preferred storage pool becomes available, a copy is made in the preferred storage pool, and the copy in the temporary storage pool is deleted.