July 31, 2023

tLogRow Storm properties (deprecated) – Docs for ESB File Delimited 7.x

tLogRow Storm properties (deprecated)

These properties are used to configure tLogRow running in the Storm Job framework.

The Storm
tLogRow component belongs to the Logs & Errors family.

This component is available in Talend Real Time Big Data Platform and Talend Data Fabric.

The Storm framework is deprecated from Talend 7.1 onwards. Use Talend Jobs for Apache Spark Streaming to accomplish your Streaming related tasks.

Basic settings

Schema and Edit schema

A schema is a row description. It defines the number of fields
(columns) to be processed and passed on to the next component. When you create a Spark
Job, avoid the reserved word line when naming the

Click Edit
to make changes to the schema. If the current schema is of the Repository type, three options are available:

  • View schema: choose this
    option to view the schema only.

  • Change to built-in property:
    choose this option to change the schema to Built-in for local changes.

  • Update repository connection:
    choose this option to change the schema stored in the repository and decide whether
    to propagate the changes to all the Jobs upon completion. If you just want to
    propagate the changes to the current Job, you can select No upon completion and choose this schema metadata
    again in the Repository Content

component offers the advantage of the dynamic schema feature. This allows you to
retrieve unknown columns from source files or to copy batches of columns from a source
without mapping each column individually. For further information about dynamic schemas,
Talend Studio

User Guide.

dynamic schema feature is designed for the purpose of retrieving unknown columns of a
table and is recommended to be used for this purpose only; it is not recommended for the
use of creating tables.


Built-In: You create and store the schema locally for this component


Repository: You have already created the schema and stored it in the
Repository. You can reuse it in various projects and Job designs.

Sync columns Click to synchronize the output file schema with the
input file schema. The Sync function is available only when the
component is linked with the preceding component using a Row connection.
Basic Displays the output flow in basic mode.
Table Displays the output flow in table cells.

Displays each row of the output flow as a key-value list.

With this mode selected, you can choose to show either the unique
name or the label of component, or both of them, for each output


(For Basic mode only)

Enter the separator which will delimit data on the Log

Print header

(For Basic mode only)

Select this check box to include the header of the input
flow in the output display.

Print component unique name in front of each
output row

(For Basic mode only)

Select this check box to show the unique name the component in
front of each output row to differentiate outputs in case several
tLogRow components are

Print schema column name in front of each

(For Basic mode only)

Select this check box to retrieve column labels from output

Use fixed length for values

(For Basic mode only)

Select this check box to set a fixed width for the value


Usage rule

This component can be used as intermediate step in a data flow or
as a n end object in the Job flowchart.

If you have subscribed to one of the
solutions with Big Data, you can also
use this component as a Storm component. In a
Storm Job, this component is used as
an intermediate or an end step. It generates native Storm code that can be executed directly
in a Storm system.

The Storm version does not support the use of the global variables.

You need to use the Storm Configuration tab in the
Run view to define the connection to a given Storm
system for the whole Job.

This connection is effective on a per-Job basis.

For further information about a
Storm Job, see the sections
describing how to create and configure a
Storm Job of the
Talend Open Studio for Big Data Getting Started Guide

Note that in this documentation, unless otherwise explicitly stated, a scenario presents
only Standard Jobs, that is to say traditional
integration Jobs.

Document get from Talend https://help.talend.com
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