You can use Last Access Time as the reference time in an ILM rule. For example, you might want to leave objects that have been viewed in the last three months on local Storage Nodes, while moving objects that have not been viewed as recently to an off-site location. You can also use Last Access Time as an advanced filter if you want an ILM rule to apply only to objects that were last accessed on a specific date.
Before using Last Access Time in an ILM rule, review the following considerations:
Take this latency into account when creating ILM rules based on Last Access Time and avoid placements that use short time periods (less than one month).
The following table summarizes whether the Last Access Time is updated for all objects in the bucket for different types of requests.
Type of request | Whether Last Access Time is updated when last access time updates are disabled | Whether Last Access Time is updated when last access time updates are enabled |
---|---|---|
Request to retrieve an object, its access control list, or its metadata | No | Yes |
Request to update an object’s metadata | 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 |