.DFSMS Tape Storage Groups function v18.02

This sectionprovides a description of the interface to DFSMS tape storage groups.

Description

BMC ThruPut Manager provides an interface to DFSMS tape storage groups, such as those affected by IBM Tape Mount Manager (TMM). BMC ThruPut Manager automatically detects the DFSMS storage groups used by your installation. During Job Analysis, if a new DFSMS-managed data set does not belong to a detected storage group, the data set is considered a DASD data set.

Implementation Summary

You might require the Library Management Software (LMS) component of the 3495 Library Dataserver software. See below.

Dependencies

The SMS Function supports the IBM 3495 Automated Tape Library Dataserver by automatically detecting the ATLDS storage groups. BMC ThruPut Manager interrogates the status of cartridges by invoking LCS External Services. To support ATLDS storage groups, you must therefore install the LCS External Interface for the 3495 Library Dataserver.

How the ThruPut Manager 3495 Library Data server Support Works

This description does not apply to virtual tape volumes. Please refer to Virtual-Tape-System-support.

For installations with a 3495 Library Dataserver, BMC ThruPut Manager provides a means to determine whether or not a given cartridge is managed by the Library Dataserver.

The ATLDS support works as follows:

• At TMSS initialization time, the LCS External Interface is invoked if a 3495 Library dataserver is detected. If the interface is not present or active TMSS terminates with appropriate messages.
• During resource determination, BMC ThruPut Manager's ATLDS support uses the following logic to determine when to invoke LCS External Services and what to do with the information:
  • For a non-specific request (scratch), no External Services call is made. If the SMS storage group associated with the scratch request matches any of the storage group names detected as AUTOMATED, it is treated as an automated scratch request.
  • For specific requests, BMC ThruPut Manager invokes LCS External Services to determine whether or not the cartridge is resident:
• If the cartridge is library resident, it is treated as an automated request.
• If the cartridge is shelf resident (belongs to the automated library but is outside) then the cartridge is treated as a tape to be returned to the 3495 dataserver.
• If the cartridge is not known to the library system, then it is treated as a non-automated cartridge.
• If a failure occurs during Job Analysis when attempting to access LCS External Services, a non-deletable message is issued and the cartridges are treated as manual cartridges. The Job Analyzer continues to interrogate the interface for each cartridge, but no further messages are produced if the interface fails. Once the interface is re-established, the non-deletable message is removed.

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