Chapter 5. Storage management 107
Content Manager OnDemand version 9 setup recommendations
The following recommendations are applicable to Content Manager OnDemand V9.0 and 
later:
/SM590000Application groups need to be set up to expire by load; then, you can use the Enhanced 
Retention Manager document hold feature. 
/SM590000Tivoli Storage Manager archive copy groups need to be defined to be event-based by 
setting the RETMIN and RETVER parameters. The RETMIN parameter needs to be set to the 
minimum number of days that a document must be retained. For a legal 7-year document, 
this setting must be 2557. For others, where you want Content Manager OnDemand to be 
100% in control and able to delete documents at anytime, set RETMIN=0. Content Manager 
OnDemand then issues a delete based on its Life of Data and Indexes or when an 
administrator performs an unload command.
/SM590000Tivoli Storage Manager Inventory expiration must be run regularly to ensure that expired 
data is cleaned up.
5.2.8  The arsmaint command
We referenced the Content Manager OnDemand arsmaint command many times in previous 
sections, but we now look closer at this command. The arsmaint program maintains 
application group data that is stored in the Content Manager OnDemand database and in 
cache storage. It maintains the system by using the storage management values that are 
specified for application groups. It is typically run on a regular schedule to migrate documents 
from cache storage to archive storage, migrate index data to archive storage, and delete 
documents from cache storage and index data from the Content Manager OnDemand 
database. 
The arsmaint command uses the application group expiration type to determine how to delete 
index data from an application group. This command can expire a table of application group 
data at a time (segment expiration type), an input file of data at a time (load expiration type), 
or individual documents (document expiration type).
For a detailed explanation of the arsmaint command and its associated parameters, with all 
of the other Content Manager OnDemand commands, see IBM Content Manager OnDemand 
for Multiplatforms, V9.5, Administration Guide, SC19-3352.
Note: When cache data is expired, by default the data is not expired until the cache 
storage file system exceeds 80% of capacity. Keeping data in cache as long as possible 
improves retrieval and viewing performance. Y ou can force the expiration of cache data 
before the cache is 80% full by using the minimum and maximum parameters to override 
the percentage full default.