text: *Figure 5-21 Content Manager OnDemand for i migration policy definition*
  
  The migration policy definition includes the following items: 
  
  (cid:2) Policy name and description: This field is for the policy name and its description. 
  
  **Tip:**The preferred practice is to put information, such as the length of time and the 
  location of the data, in the description rather than in the policy name field. You can 
  change, add, and delete levels, but you cannot change the name. If your requirements 
  change, you do not want a name that is no longer accurate. 
  
  (cid:2) Enable aggregation: If this item is selected, ASM combines individual archived objects into 
  larger objects to provide a more efficient process. Archived objects are appended to the 
  same file until the aggregate is closed. 
  
  (cid:2) Maximum size: The value of this field determines the maximum size of the aggregate file. 
  ASM closes the existing aggregate and opens a new aggregate when the maximum value 
  is reached. 
  
  (cid:2) Close aggregate only when maximum size is reached: If this item is selected, the 
  aggregate stays open until the maximum size is reached. 
  
  (cid:2) Close aggregate based on number of days: The value in this field specifies the number of 
  days before an aggregate closes. ASM closes the aggregate after the specified number of 
  days or when the specified maximum size is reached, whichever occurs first. 