228 IBM Content Manager OnDemand Guide
With Content Manager OnDemand for i, when the expiration type is set to Load, you can still 
allow ASM to handle the data and index expiration by creating an expiration level in the 
migration policy.
Expiration type: Storage Manager (z/OS)
The storage manager (OAM or VSAM) determines when data is deleted from the system. 
Storage Manager expiration works with either the ARSEXPIR program or the ARSEXOAM program. 
For more information about how to configure the system to use the ARSEXPIR and ARSEXOAM 
programs, see the IBM Content Manager OnDemand for z/OS Administration Guide:
http://www.ibm.com/support/knowledgecenter/SSQHWE_9.0.0/com.ibm.ondemand.administe
ringzos.doc/aboutpub.htm?cp=SSQHWE_9.0.0%2F7-0
Storage Manager expiration is supported only on Content Manager OnDemand for z/OS 
systems. 
Expiration type: Segment 
The system deletes a segment (table) of data from the application group. The system can 
delete a segment of data only after the segment is closed and every record in the segment 
reaches its expiration date. 
With Multiple Loads per Database Table enabled, the system uses the maximum number of 
rows to determine when to close a table. A segment likely contains the data from more than 
one input file. If the Maximum Rows setting is too large, the segment is not expired until all of 
the documents in the table reach their expiration dates. If the Maximum Rows setting is too 
small, segments are created constantly and potentially deleted (based on the expiration 
date). This large number of tables imposes a performance impact during the search query 
time and expiration time.
The system derives the expiration date from the Segment field (or the date that the data was 
loaded, if there is no Segment field) and the Life of Data and Indexes field. If the Segment 
field contains a date in the MMYY format, data is eligible to be deleted on the first day of the 
month (MM). 
To specify the Segment field, complete the following steps:
1. Click the Field Information tab.
2. Select a date or date and time field.
3. Select the Segment check box. 
Expiration type: Document 
When the expiration type is set to Document, the system deletes a document from the 
application group. To determine when to delete a document, the system uses the value of the 
Expire Date field and the Life of Data and Indexes field. If the Expire Date field contains only 
the month and year (MMYY format), the system deletes documents on the first day of the 
month (MM). 
To specify the Expire Date field, complete the following steps:
1. Click the Field Information tab.
2. Select a date or date and time field.
3. Select the Expire Date check box. 
Performance note: Individual document deletion is the most costly type of deletion in 
terms of processor consumption and run time.