Chapter 5. Storage management 111
General
Consider the following general recommendations when you work with OAM for Content 
Manager OnDemand:
/SM590000Define a user catalog exclusively for collection names.
/SM590000Cache the user catalog in the virtual lookaside facility (VLF).
/SM590000Migrate objects to optical or tape (OSMC) during non-peak hours.
/SM590000Spread OAM collections over multiple DB2/disk/channels.
/SM590000Spread out the application groups to different collection names: 
OAM collections → storage groups → DB2 database
/SM590000Group your applications based on retrieval expectations:
– Collect small, frequently used applications together.
– Isolate your important applications so that the other applications do not get in the way.
DB2 
Consider the following list of recommendations that relate to DB2:
/SM590000Ensure that enough DB2 connections are available to support the OAM requests. 
/SM590000Run the REORG, RUNSTATS, and REBIND commands, as appropriate.
/SM590000Partition OAM table spaces larger than 2 GB.
Devices
Consider the following recommendations that relate to devices:
/SM590000Determine and set the Initial Access Response Seconds (IARS) option.
/SM590000Assign objects to storage classes that have an adequate IARS that is defined and to 
management classes that do not cause a transition to a slower storage class until the 
frequency of retrieving the objects is reasonably low.
/SM590000Determine whether to place the object on disk or removable (optical or tape) media.
/SM590000If the IARS opts for REMOVABLE media, determine whether to place the object on optical 
or tape.
/SM590000Verify that the required Sustained Data Rate is achieved based on the selected object 
placement.
Tapes
Consider the following recommendations that relate to tapes:
/SM590000Modify (CBROAMxx) MAXTAPERETRIEVETASKS and MAXTAPESTORETASKS (if you are using tape 
retrieves because the default=1). Both of these parameters are configured at the global 
level and at the storage group level. 
/SM590000The global level MAXTAPERETRIEVETASKS (tasks) is defined by SETOAM. SETOAM specifies the 
total number of concurrent tape retrievals that are possible at a time. (It controls the 
maximum number of tape drives that can be concurrently allocated to the OAM address 
space for reading object data from tape.) This number must be less than or equal to the 
number of tape drives on the system. Do not specify a number that is greater than the 
number of tape drives that are available to OAM for the MAXTAPESTORETASKS or the 
MAXTAPERETRIEVETASKS subparameters because a system can go into allocation recovery 
and attempt to allocate tape drives after all of the tape drives are in use, causing system 
problems.
/SM590000The storage group level MAXTAPERETRIEVETASKS (tasks) specifies the maximum concurrent 
tape retrievals that are possible for a specific storage group. If MAXTAPERETRIEVETASKS is