The target distributed servers are defined to DTS using control statements. When a remote server's inventory is to be queried, DTS dispatches a query task to establish a session with the target server. DTS identifies what iSponsors are running on a remote server and selects the appropriate iSponsor and method. DTS uses the selected method to query the backup server's database. The retrieved data is then used to construct a Distributed Tape Inventory File. The current inventory is compared to the previous inventory.
DTS then updates the VMF to reflect any changes detected in that server's inventory. This validation is done in order to reduce redundant updates. DTS logs query activity to a sysout file. The level of logging is controlled with the MSGLEVEL parameter.
Execution of data retrieval sessions can be triggered periodically using the scheduling component of CTS, CTSSCHD. Data retrieval sessions can also be triggered manually using a console command.
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