Information lifecycle management is a set of rules that determine how an object’s data is protected from loss over time. ILM rules do not manage object metadata, which is managed by the DDS service.
Information lifecycle management settings are implement through an ILM policy that is made up of ILM rules. Every object ingested into the system is evaluated against the ILM policy and its ILM rules. ILM rules use an object’s metadata to filter an object and determine what actions to take in storing and copying the object’s data. For more information about configuring an ILM policy, see the Administrator Guide.
The following figure shows an ILM policy whose ILM rule determines that at ingest one replicated copy is stored at data center site one (DC1) on disk (Storage Nodes), one replicated copy is stored at data center site two (DC2) on disk (Storage Nodes), and that one replicated copy is stored at DC2 on tape (Archive Node). At the end of one year, the copy on disk at DC2 is deleted.