You can use Ingest Time or 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 advanced filtering if you want an ILM rule to apply only to objects that were ingested or last accessed on a specific date.
Before using Last Access Time or Ingest Time in an ILM rule, read through the following information to understand how to best use Last Access Time as a reference time, and to understand the other tasks that you need to perform:
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).
Type of request | Behavior if last access time is disabled (default) Last access time updated? |
Behavior if last access time is enabled Last access time updated? |
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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 |