Distributed Tape Support (DTS) provides a mechanism for recording the tape inventories of distributed backup servers in the TMC. It provides a complete picture of all of the tapes in the entire enterprise, including both mainframe and distributed. Various information is collected based on the distributed backup product that is in use. This information includes the volume serial number, creation date, and other data relative to tape media. The following distributed backup products are currently supported:
This service runs in the CTS address space by the program named CTSDTS under the service name DTS.
iSponsor Technology CTSDTS uses the CA iSponsor/iGateway technology developed for the CA Portal product to retrieve data from the remote backup servers over TCP/IP. iSponsors are hosted by the iGateway that resides on the target server. The iGateway is a layer of software that communicates with the IP stack to receive and respond to requests for iSponsors.
The iSponsors are applets that consist of multiple methods. These methods extract data from the server and transmit the data over the iGateway to the requestor. Each method that belongs to a particular iSponsor provides a unique view of the backup server's database. For each supported distributed backup product, there is at least one iSponsor. Certain supported products have multiple iSponsors, allocating one for each supported release. To retrieve data from a remote backup server, two components must be installed on each remote server to be accessed:
iSponsors and iGateway components may be downloaded free of charge from supportconnect.ca.com. For more information on the iSponsor/iGateway technology refer to the Product Home Page for CA Portal.
Method of Operation The target distributed servers are defined to DTS using control statements. To query a remote server's inventory, 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 and the current inventory is compared to the previous inventory. DTS then updates the TMC to reflect any changes detected in that server's inventory. Validations are performed in a sequential 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 CTS scheduling component, CTSSCHD. Data retrieval sessions can also be triggered manually using a console command.
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