What information lifecycle management is

Information lifecycle management is a set of rules organized into a policy. The rules determine how an object’s data is protected from loss over time.

Information lifecycle management is implemented through an ILM policy that is made up of ILM rules. Every object ingested into the system is evaluated against the ILM rules in the active ILM policy. ILM rules look at an object’s metadata to filter objects and determine what actions to take in storing and copying the object’s data.

ILM rules define:
The following figure shows an ILM policy whose ILM rule determines the following:
  1. When an object is ingested (day zero):
    • Two replicated copies are stored at Site 1 on disk (Storage Nodes), providing local network latency access to this data.
    • One erasure-coded copy is distributed among Sites 1 through 3 on disk (Storage Nodes), providing storage-efficient protection against site failure.
  2. At the end of Day 14, the two replicated copies on disk at Site 1 are deleted.

    For example, some users might only require local network latency access to the data for the first 14 days.

ILM rule example

For details about configuring ILM rules and policies, see the instructions for administering StorageGRID.