The ILM policy will then evaluate the object and distribute it across the grid in accordance with the ILM rules, and delete the redundant copy in the ingestion site once the matching rule is satisfied...The ILM policy will then evaluate the object and distribute it across the grid in accordance with the ILM rules, and delete the redundant copy in the ingestion site once the matching rule is satisfied. Dual Commit is analogous to the ONTAP concept of logging an incoming write into two NVRAM locations to give a client early acknowledgment before it is finally flushed out to either RAID-4, RAID-DP, or RAID-TEC depending on the target aggregate.