Batch Processing Protocol for Historical Context

Batch Processing Use Cases

While streaming handles real-time updates, batch processing serves historical context extraction, periodic full syncs, and large-scale transformations. ECM Protocol defines batch processing standards.

Job Specification

Batch Job Definition

{
  "job_id": "historical-sync-001",
  "job_type": "full_extraction",
  "source": {
    "connector": "data_warehouse",
    "query": "SELECT * FROM customer_history WHERE updated_at >= :last_sync"
  },
  "transform": {
    "processor": "customer_transformer",
    "config": {...}
  },
  "sink": {
    "store": "context_store",
    "mode": "upsert"
  },
  "schedule": "0 2 * * *",
  "parameters": {
    "last_sync": "${previous_job.end_time}"
  }
}

Partitioning Strategy

Partition Specification

{
  "partitioning": {
    "strategy": "hash",
    "key": "customer_id",
    "partitions": 16
  }
}

Partition Types

Hash partitioning for even distribution. Range partitioning for ordered processing. List partitioning for categorical splits.

Checkpoint Protocol

Checkpoint Management

Batch jobs checkpoint progress for resumption:

{
  "checkpoint": {
    "job_id": "historical-sync-001",
    "run_id": "run-abc",
    "partition": 5,
    "offset": 150000,
    "timestamp": "2024-01-15T03:45:00Z",
    "status": "in_progress"
  }
}

Recovery Behavior

Resume from last checkpoint on failure. Skip completed partitions. Replay partial partitions from checkpoint.

Quality Validation

Validation Rules

{
  "validation": {
    "rules": [
      {"type": "row_count", "min": 100000, "max": 200000},
      {"type": "null_check", "fields": ["customer_id"], "threshold": 0},
      {"type": "freshness", "field": "updated_at", "max_age": "24 hours"}
    ],
    "on_failure": "abort_and_alert"
  }
}

Scheduling Protocol

Schedule Types

Cron for periodic execution. Event-triggered for dependencies. Manual for ad-hoc runs. Backfill for historical ranges.

Dependency Management

{
  "dependencies": [
    {"job": "reference-data-sync", "window": "24 hours"},
    {"job": "customer-extract", "status": "success"}
  ]
}

Conclusion

The Batch Processing Protocol enables large-scale context extraction and transformation. Implement partitioning for parallelism, checkpointing for reliability, and validation for quality assurance.

> Batch Processing Protocol for Historical Context