When grid administrators create the Information Lifecycle Management (ILM) rules for a StorageGRID system, they can optionally specify that an object's last access time be used to determine whether to move that object to a different storage location. If you are using an S3 tenant, you can take advantage of such rules by enabling last access time updates for the objects in an S3 bucket.
These instructions only apply to StorageGRID systems that include at least one ILM rule that uses the Last Access Time option in its placement instructions. You can ignore these instructions if your StorageGRID system does not include such a rule.
Last Access Time is one of the options available for the Reference Time placement instruction for an ILM rule. Setting the Reference Time for a rule to Last Access Time lets grid administrators specify that objects be placed in certain storage locations based on when those objects were last retrieved (read or viewed).
By default, updates to last access time are disabled. If your StorageGRID system includes an ILM rule that uses the Last Access Time option, you must enable updates to last access time for the S3 buckets specified in that rule.
Type of request | Behavior if last access time is disabled (default) | Behavior if last access time is enabled | ||
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Last access time updated? | Object added to ILM evaluation queue? | Last access time updated? | Object added to ILM evaluation queue? | |
Request to retrieve an object, its access control list, or its metadata | No | No | Yes | Yes |
Request to update an object’s metadata | Yes | Yes | Yes | Yes |
Request to copy an object from one bucket to another |
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Request to complete a multipart upload | Yes, for the assembled object | Yes, for the assembled object | Yes, for the assembled object | Yes, for the assembled object |