Run, Preview and Debug a Pipeline

Run, Preview and Debug a Pipeline

Running a Pipeline

Running a pipeline to see how it performs can be done by completing one of the following tasks:

Using the Run icon
Select Run and Start execution from the top menu
Pressing F8

In the pipeline run dialog, hit the ‘New’ button in the upper right corner to create a new ‘Pipeline run configuration’.

In the dialog that pops up, add ‘Local Pipeline’ as the pipeline configuration name and choose the ‘Local pipeline engine’ as engine type.

Click ‘Ok’ to return to the pipeline run dialog.

Choose the logging level as described below.

LogLevel	Description
Nothing	Do not record any logging output.
Error	Only record errors in logging output.
Minimal	Only use minimal logging.
Basic	This is the default logging level.
Detailed	This logging level gives a detailed logging output.
Debugging	Results in a very detailed output for debugging purposes.
Row Level	Logging at row level.

Make sure your configuration is selected and hit ‘Launch’.

When a pipeline has run succesfully green check marks are displayed in the right upper corner on the transforms.

The transforms also show a little table icon, giving you access to a preview of the results of that transform.

When a pipeline fails, a red triangle is shown in the upper right corner of the failed transform. Hover your mouse over the red error triangle to take a quick peek at the error message. The full stacktrace is available in the logs. Check pipeline error handling to learn about how you can handle errors in your pipeline gracefully (which is not necessarily what you want).

After each run the execution results are displayed in the panel on the bottom of your window. The Execution Results contains two tabs:

Transform Metrics
Logging

The Transform Metrics tab displays metrics per transform.

Following metrics are displayed:

Metric	Description
Copy
Input	Number of rows read from
Read	Number of rows coming from previous transform
Written	Number of rows leaving this step toward next transform
Output	Number of rows written to a file or table
Updated	Number of rows updated by the transform
Rejected
Errors	Number of errors in the execution. The whole row is marked red if an error occurs
Buffers Input
Buffers Output
Duration	The duration of the execution of the transform
Speed
Status	The step status; Running, Stopped, Finished,

The loggign tab displays the log of the pipeline according to the log level choosen on execution.

Preview a pipeline

Preview the result off a pipeline to see how it performs can be done by completing one of the following tasks:

Using the preview icon
Select Run and Preview from the top menu
Select Preview from the transform action Menu
Click on the tiny bottom right icon after running the transformation

In the pipeline preview dialog the transform from which the result must be previewed can be selected. Furthermore the number of rows to preview can be determined as well as a pause condition. When finished press the Quick Launch button. If you want to change the Pipeline run configuration click Configure. The result is displayed in ascending order. The result is previewed as displayed below.

Debug a pipeline

Debugging a pipeline to eliminate errors can be done by completing one of the following tasks:

Using the debug icon
Select Run and Debug from the top menu
Select Debug output from the transform action Menu

The same dialog is displayed as when using the preview functionality, only the enabled options are different.

In the pipeline debug dialog the transform from which the result must be debugged can be selected. Furthermore the number of rows can be determined as well as a pause condition. When finished press the Quick Launch button. If you want to change the Pipeline run configuration click Configure. The result is displayed in descending order.