GSAM

Key Characteristics

• • Sequential file access from IMS
  • Integration with IMS transaction processing
  • Support for QSAM and VSAM datasets
  • Batch and online processing
  • Standard z/OS dataset compatibility
• GSAM Functions:
  • Sequential read operations
  • Sequential write operations
  • Dataset positioning
  • End-of-file detection
  • Error handling
• Dataset Types Supported:
  • Physical sequential (PS) datasets
  • VSAM ESDS datasets
  • GDG generations
  • Concatenated datasets
• Use Cases in IMS:
  • Loading IMS databases from flat files
  • Extracting data to sequential files
  • Report generation
  • Interface file processing
  • Data exchange with non-IMS systems

Use Cases

• • IMS batch processing with sequential files
  • Data extraction for reporting
  • Interface file creation
  • Database loading utilities
  • Legacy file integration
• ## H
• The term "Gain" (meaning "increase or acquisition") is a general English word and does not have a specific, unique technical definition, command, or component associated with it within the IBM mainframe systems, z/OS, COBOL, JCL, CICS, DB2, or IMS ecosystem.
• While one might refer to a "gain in performance" or a "gain in efficiency," "gain" itself is not a technical term or concept specific to mainframe technology that would warrant a dedicated glossary entry in the way that terms like JCL, CICS, DB2, or VSAM do.
• Therefore, I cannot generate a glossary entry for "Gain" that adheres to the prompt's requirement to "Focus on the mainframe/z/OS context of the term" and provide specific technical characteristics, use cases, and relationships within that domain.
• Please provide a mainframe-specific technical term for which you would like a glossary entry.

Related Concepts