Pentaho Data Integration
InstallationBusiness AnalyticsCToolsData CatalogData QualityLLMs
  • Overview
    • Pentaho Data Integration ..
  • Data Integration
    • Getting Started
      • Configuring PDI UI
      • KETTLE Variables
    • Concepts & Terminolgy
      • Hello World
      • Logging
      • Error Handling
    • Data Sources
      • Flat Files
        • Text
          • Text File Input
          • Text File Output
        • Excel
          • Excel Writer
        • XML
          • Read XML
        • JSON
          • Read JSON
      • Databases
        • CRUID
          • Database Connections
          • Create DB
          • Read DB
          • Update DB
          • Insert / Update DB
          • Delete DB
        • SCDs
          • SCDs
      • Object Stores
        • MinIO
      • SMB
      • Big Data
        • Hadoop
          • Apache Hadoop
    • Enrich Data
      • Merge
        • Merge Streams
        • Merge Rows (diff)
      • Joins
        • Cross Join
        • Merge Join
        • Database Join
        • XML Join
      • Lookups
        • Database Lookups
      • Scripting
        • Formula
        • Modified JavaScript Value
        • User Defined Java Class
    • Enterprise Solution
      • Jobs
        • Job - Hello World
        • Backward Chaining
        • Parallel
      • Parameters & Variables
        • Parameters
        • Variables
      • Scalability
        • Run Configurations
        • Partition
      • Monitoring & Scheduling
        • Monitoring & Scheduling
      • Logging
        • Logging
      • Dockmaker
        • BA & DI Servers
      • Metadata Injection
        • MDI
    • Plugins
      • Hierarchical Data Type
  • Use Cases
    • Streaming Data
      • MQTT
        • Mosquitto
        • HiveMQ
      • AMQP
        • RabbitMQ
      • Kafka
        • Kafka
    • Machine Learning
      • Prerequiste Tasks
      • AutoML
      • Credit Card
    • RESTful API
    • Jenkins
    • GenAI
  • Reference
    • Page 1
Powered by GitBook
On this page
  1. Data Integration
  2. Enterprise Solution
  3. Jobs

Backward Chaining

Rules when executing in multiple threads ..

PreviousJob - Hello WorldNextParallel

Last updated 4 months ago

There are rules on the sequence in which Job Entries are executed.

In this demonstration the Job Entries were placed on the canvas in the following order:

  • START

  • Transformation A

  • Transformation B

  • Transformation C

  • Success

The Job will start with Transformation A as this was placed first on the canvas.

Even though Transformation C and Success were placed on the Canvas after Transformation B .. it will be executed before Transformation B as there's a hop from Transformation A.

Once the Transformation A pipeline has been completed with a success then Transformation B will be executed.

RUN the Transformation

  1. Click the Run button in the Canvas Toolbar.

  2. Click on the Job Metrics tab.

as you can see from the Job metrics Transformation A -> Success is executed before Transformation B. Check the dependencies ...

Job execution - backward chaining
Job metrics