Chapter 10. Migration and expiring data and indexes 233
Y ou control automatic expiration processing by using the expiration processing interval 
(EXPINTERVAL) in the server options file (dsmserv.opt). Y ou can set the option by editing the 
dsmserv.opt file. For more information, see the Content Manager OnDemand Installation and 
Configuration Guide:
http://www.ibm.com/support/knowledgecenter/
Y ou can obtain more information in the “Running expiration processing automatically” section 
at the following website:
http://ibm.co/1iO9SdX
If you use the server option to control when expiration processing occurs, ASM processes 
expirations each time that you start the server. Afterward, it runs expiration processing at the 
interval that you specified with the option, which is measured from the start time of the server.
Y ou can manually start expiration processing by running the EXPIRE INVENTORY command. 
Expiration processing then deletes information about expired files from the database. Y ou can 
schedule this command by running the DEFINE SCHEDULE command. If you schedule the 
EXPIRE INVENTORY command, set the expiration interval to 0 (zero) in the server options so 
that ASM does not run expiration processing when you start the server. Y ou can control how 
long the expiration process runs by using the DURATION parameter with the EXPIRE INVENTORY 
command.
Reclaiming space in storage pools
Space on a storage pool volume becomes reclaimable as documents expire or as they are 
deleted from the volume. For example, documents become obsolete because of aging.
ASM reclaims the space in storage pools based on a reclamation threshold that you can set 
for each storage pool. When the percentage of space that can be reclaimed on a volume rises 
above the reclamation threshold, ASM reclaims the volume. ASM rewrites documents on the 
volume to other volumes in the storage pool, making the original volume available for new 
documents.
ASM checks whether reclamation is needed at least once each hour and begins space 
reclamation for eligible volumes. Y ou can set a reclamation threshold for each storage pool 
when you define or update the storage pool.
During reclamation, ASM copies the files to volumes in the same storage pool unless you 
specified a reclamation storage pool. Use a reclamation storage pool to allow automatic 
reclamation for a storage pool with only one drive. See your ASM documentation for details. 
After ASM moves all documents to other volumes, one of the following actions occur for the 
reclaimed volume: 
/SM590000If you explicitly defined the volume to the storage pool, the volume becomes available for 
reuse by that storage pool.
/SM590000If the volume was acquired as a scratch volume, ASM deletes the volume from its 
database.
Important: For more information about reclamation processing, including choosing a 
reclamation threshold, reclaiming volumes in a storage pool with one drive, reclaiming 
Write Once Read Many (WORM) optical media, reclaiming for copy storage pools, and 
reclaiming offsite volumes, see your Tivoli Storage Manager documentation.