tCassandraBulkExec - 6.1

Talend Components Reference Guide

EnrichVersion
6.1
EnrichProdName
Talend Big Data
Talend Big Data Platform
Talend Data Fabric
Talend Data Integration
Talend Data Management Platform
Talend Data Services Platform
Talend ESB
Talend MDM Platform
Talend Open Studio for Big Data
Talend Open Studio for Data Integration
Talend Open Studio for Data Quality
Talend Open Studio for ESB
Talend Open Studio for MDM
Talend Real-Time Big Data Platform
task
Data Governance
Data Quality and Preparation
Design and Development
EnrichPlatform
Talend Studio

Warning

This component will be available in the Palette of the studio on the condition that you have subscribed to one of the Talend solutions with Big Data.

The tCassandraOutputBulk and tCassandraBulkExec components are generally used together as parts of a two step process. In the first step, an SSTable is generated. In the second step, this SSTable is written into Cassandra. These two steps are fused together in the tCassandraOutputBulkExec component, detailed in a separate section. The advantage of using two separate components is that the data can be transformed before it is loaded into Cassandra.

tCassandraBulkExec properties

Component family

Big Data / Cassandra

 

Function

tCassandraBulkExec writes data from an SSTable into Cassandra.

Purpose

As a dedicated component, tCassandraBulkExec allows you to gain in performance while carrying out the Insert operations to a Cassandra column family.

Basic settings

DB Version

Select the Cassandra version you are using.

Warning

  • For Cassandra 1.1.2, only local visit on Linux is supported.

  • For Cassandra 1.2.2, make sure that the server and the client run on the same operating system.

  • Cassandra 2.0.0 only works with JVM1.7.

 

Host

Hostname or IP address of the Cassandra server.

 

Port

Listening port number of the Cassandra server.

 

Required authentication

Select this check box to provide credentials for the Cassandra authentication.

Warning

This check box will not appear if you select Cassandra 1.1.2 from theDB Version list.

 

Username

Fill in this field with the username for the Cassandra authentication.

 

Password

Fill in this field with the password for the Cassandra authentication.

To enter the password, click the [...] button next to the password field, and then in the pop-up dialog box enter the password between double quotes and click OK to save the settings.

 

Keyspace

Type in the name of the keyspace into which you want to write the SSTable.

 

Column family

Type in the name of the column family into which you want to write the SSTable.

 

SSTable directory

Specify the local directory of the SSTable to be loaded into Cassandra. Note that the complete path to the SSTable will be the local directory appended by the specified keyspace name and column family name.

For example, if you set the local directory to /home/talend/sstable, and specify testk as the keyspace name and testc as the column family name, the complete path to the SSTable will be /home/talend/sstable/testk/testc/.

Advanced settings

tStatCatcher Statistics

Select this check box to gather the Job processing metadata at the Job level as well as at each component level.

Global Variables

ERROR_MESSAGE: the error message generated by the component when an error occurs. This is an After variable and it returns a string. This variable functions only if the Die on error check box is cleared, if the component has this check box.

A Flow variable functions during the execution of a component while an After variable functions after the execution of the component.

To fill up a field or expression with a variable, press Ctrl + Space to access the variable list and choose the variable to use from it.

For further information about variables, see Talend Studio User Guide.

Usage

This component can be used as a standalone component.

Log4j

If you are using a subscription-based version of the Studio, the activity of this component can be logged using the log4j feature. For more information on this feature, see Talend Studio User Guide.

For more information on the log4j logging levels, see the Apache documentation at http://logging.apache.org/log4j/1.2/apidocs/org/apache/log4j/Level.html.

Limitation

Currently, the execution of this component ends the entire Job.

Related Scenario

No scenario is available for this component yet.