August 15, 2023

tCassandraConfiguration – Docs for ESB 6.x

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  4. tCassandraConfiguration – Docs for ESB 6.x

tCassandraConfiguration

Enables the reuse of the connection configuration to a Cassandra server in the same
Job.

tCassandraConfiguration provides Cassandra connection information for the
Cassandra components used in the same Spark Job. The Spark cluster to be used reads this
configuration to eventually connect to Cassandra.

Depending on the Talend solution you
are using, this component can be used in one, some or all of the following Job
frameworks:

tCassandraConfiguration properties for Apache Spark Batch

These properties are used to configure tCassandraConfiguration running in the Spark Batch Job framework.

The Spark Batch
tCassandraConfiguration component belongs to the Storage and the Databases families.

The component in this framework is available only if you have subscribed to one
of the
Talend
 solutions with Big Data.

Basic settings

Host

Enter the URL of the Cassandra server you need the Job to connect to.

Port

Type in the listening port number of the Cassandra server to be connected to.

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.

Configuration

Add the Spark properties relating to Cassandra to this table and give them the values you
want to use in order to override the default ones at runtime.

  • For example, if you need to define the Cassandra consistency level for
    reading, select the input_consistency_level
    property in the Property name column and enter
    the numeric level value in the Value
    column.

The following list presents the numerical values you can put and the consistency levels
they signify:

  • 0: ANY,

  • 1: ONE,

  • 2: TWO,

  • 3: THREE,

  • 4: QUORUM,

  • 5: ALL,

  • 6: LOCAL_QUORUM,

  • 7: EACH_QUORUM,

  • 8: SERIAL,

  • 9: LOCAL_SERIAL,

  • 10: LOCAL_ONE

For further details about each of the consistency policies, see Datastax
documentation about Cassandra.

For further information for all the properties listed in this table and their default
values, see https://github.com/datastax/spark-cassandra-connector/blob/master/doc/1_connecting.md.

Usage

Usage rule

This component is used with no need to be connected to other components.

You need to drop tCassandraConfiguration along with the
Cassandra-related Subjob to be run in the same Job so that the configuration is used by the
whole Job at runtime.

This component, along with the Spark Batch component Palette it belongs to, appears only
when you are creating a Spark Batch Job.

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

Spark Connection

You need to use the Spark Configuration tab in
the Run view to define the connection to a given
Spark cluster for the whole Job. In addition, since the Job expects its dependent jar
files for execution, you must specify the directory in the file system to which these
jar files are transferred so that Spark can access these files:

  • Yarn mode: when using Google
    Dataproc, specify a bucket in the Google Storage staging
    bucket     field in the Spark
    configuration     tab; when using other distributions, use a
    tHDFSConfiguration
    component to specify the directory.

  • Standalone mode: you need to choose
    the configuration component depending on the file system you are using, such
    as tHDFSConfiguration
    or tS3Configuration.

This connection is effective on a per-Job basis.

Related scenarios

No scenario is available for the Spark Batch version of this component
yet.

tCassandraConfiguration properties for Apache Spark Streaming

These properties are used to configure tCassandraConfiguration running in the Spark Streaming Job framework.

The Spark Streaming
tCassandraConfiguration component belongs to the Storage and the Databases families.

The component in this framework is available only if you have subscribed to Talend Real-time Big Data Platform or Talend Data
Fabric.

Basic settings

Host

Enter the URL of the Cassandra server you need the Job to connect to.

Port

Type in the listening port number of the Cassandra server to be connected to.

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.

Configuration

Add the Spark properties relating to Cassandra to this table and give them the values you
want to use in order to override the default ones at runtime.

  • For example, if you need to define the Cassandra consistency level for
    reading, select the input_consistency_level
    property in the Property name column and enter
    the numeric level value in the Value
    column.

The following list presents the numerical values you can put and the consistency levels
they signify:

  • 0: ANY,

  • 1: ONE,

  • 2: TWO,

  • 3: THREE,

  • 4: QUORUM,

  • 5: ALL,

  • 6: LOCAL_QUORUM,

  • 7: EACH_QUORUM,

  • 8: SERIAL,

  • 9: LOCAL_SERIAL,

  • 10: LOCAL_ONE

For further details about each of the consistency policies, see Datastax
documentation about Cassandra.

For further information for all the properties listed in this table and their default
values, see https://github.com/datastax/spark-cassandra-connector/blob/master/doc/1_connecting.md.

Usage

Usage rule

This component is used with no need to be connected to other components.

You need to drop tCassandraConfiguration along with the
Cassandra-related Subjob to be run in the same Job so that the configuration is used by the
whole Job at runtime.

This component, along with the Spark Streaming component Palette it belongs to, appears
only when you are creating a Spark Streaming Job.

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

Spark Connection

You need to use the Spark Configuration tab in
the Run view to define the connection to a given
Spark cluster for the whole Job. In addition, since the Job expects its dependent jar
files for execution, you must specify the directory in the file system to which these
jar files are transferred so that Spark can access these files:

  • Yarn mode: when using Google
    Dataproc, specify a bucket in the Google Storage staging
    bucket     field in the Spark
    configuration     tab; when using other distributions, use a
    tHDFSConfiguration
    component to specify the directory.

  • Standalone mode: you need to choose
    the configuration component depending on the file system you are using, such
    as tHDFSConfiguration
    or tS3Configuration.

This connection is effective on a per-Job basis.

Related scenarios

No scenario is available for the Spark Streaming version of this component
yet.

Document get from Talend https://help.talend.com
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Docs 6.x
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