di-agent-knowledge-engine-datastage

name	di-agent-knowledge-engine-datastage
description	Q&A reference for the DataStage parallel engine — parallelism, partitioning theory, APT configuration files, concurrent job execution, restart/recovery, disk/resource tuning, dataset performance, flow optimization (partitioning/sorting/memory), and per-stage semantics. Use for conceptual engine questions and stage property lookups regardless of authoring tool.

DataStage Parallel Engine

When to Use DataStage

• Batch ETL processing of large data volumes
• Parallel processing across multiple nodes
• Complex transformations with high throughput requirements
• Integration with enterprise databases and file systems
• Data warehouse loading and CDC operations

Engine Characteristics

• Parallel processing: Divides data into partitions processed simultaneously
• Pipeline parallelism: Multiple stages process different data concurrently
• Scalable: Add nodes to increase throughput
• High performance: Optimized for large-scale data movement

Key Concepts

• Partitioning: Data divided across processing nodes
• Nodes: Physical or logical processing units
• Partitions: Subsets of data processed independently
• Configuration file: Defines nodes and resources

Performance Factors

• Job design (stage selection, partitioning, data flow)
• Configuration (node count, partition count, resources)
• Infrastructure (disk I/O, network bandwidth, CPU)

References

• Engine Details
• Concurrent Job Execution
• Configuration Management
• Data Set Performance
• Disk and Resource Optimization
• Restart and Recovery
• Flow optimization (partitioning, sorting, memory) → optimization/overview.md
• Per-stage semantics, requirements, best practices, and properties → stages/
• Transformer expressions