tHBaseNamespace Standard properties

These properties are used to configure tHBaseNamespace running in the Standard Job framework.

The Standard tHBaseNamespace component belongs to the Big Data and the Databases NoSQL families.

The component in this framework is available in all Talend products with Big Data and in Talend Data Fabric.

Basic settings

Property type	Either Built-In or Repository. Built-In: No property data stored centrally. Repository: Select the repository file where the properties are stored.
Use an existing connection	Select this check box and in the Component List drop-down list, select the desired connection component to reuse the connection details you already defined.
Distribution	Select the cluster you are using from the drop-down list. The options in the list vary depending on the component you are using. Among these options, the following ones requires specific configuration: If available in this Distribution drop-down list, the Microsoft HD Insight option allows you to use a Microsoft HD Insight cluster. For this purpose, you need to configure the connections to the HD Insight cluster and the Windows Azure Storage service of that cluster in the areas that are displayed. For detailed explanation about these parameters, see Configuring the connection manually. If you select Amazon EMR, find more details in Amazon EMR - Getting Started. The Custom option allows you to connect to a cluster different from any of the distributions given in this list, that is to say, to connect to a cluster not officially supported by Talend . Select Import from existing version to import an officially supported distribution as base and then add other required jar files which the base distribution does not provide. Select Import from zip to import the configuration zip for the custom distribution to be used. This zip file should contain the libraries of the different Hadoop elements and the index file of these libraries. Note that custom versions are not officially supported by Talend . Talend and its community provide you with the opportunity to connect to custom versions from Talend Studio but cannot guarantee that the configuration of whichever version you choose will be easy, due to the wide range of different Hadoop distributions and versions that are available. As such, you should only attempt to set up such a connection if you have sufficient Hadoop experience to handle any issues on your own. Information noteNote: In this dialog box, the active check box must be kept selected so as to import the jar files pertinent to the connection to be created between the custom distribution and this component. For a step-by-step example about how to connect to a custom distribution and share this connection, see Hortonworks.
HBase version	Select the version of the Hadoop distribution you are using. The available options vary depending on the component you are using.
Hadoop version of the distribution	This list is displayed only when you have selected Custom from the distribution list to connect to a cluster not yet officially supported by Talend Studio. In this situation, you need to select the Hadoop version of this custom cluster, that is to say, Hadoop 1 or Hadoop 2.
Zookeeper quorum	Type in the name or the URL of the ZooKeeper service you use to coordinate the transaction between your Talend Studio and your database. Note that when you configure the ZooKeeper, you might need to explicitly set the zookeeper.znode.parent property to define the path to the root Znode that contains all the Znodes created and used by your database; then select the Set Zookeeper znode parent check box to define this property.
Zookeeper client port	Type in the number of the client listening port of the ZooKeeper service you are using.
Use Kerberos authentication	If the database to be used is running with Kerberos security, select this check box, then, enter the principal names in the HBase Master principal and HBase Region Server principal fields. You should be able to find the information in the hbase-site.xml file of the cluster to be used. If you need to use a Kerberos keytab file to log in, select Use a keytab to authenticate. A keytab file contains pairs of Kerberos principals and encrypted keys. You need to enter the principal to be used in the Principal field and the access path to the keytab file itself in the Keytab field. This keytab file must be stored in the machine in which your Job actually runs, for example, on a Talend JobServer. Note that the user that executes a keytab-enabled Job is not necessarily the one a principal designates but must have the right to read the keytab file being used. For example, the username you are using to execute a Job is user1 and the principal to be used is guest; in this situation, ensure that user1 has the right to read the keytab file to be used.
Namespace	Enter the name of the namespace you want to create.
Namespace action	Select the action you need to take for creating a namespace: Create namespace: creates a namespace. Create namespace if not exists: creates a namespace only if no namespace already exists.
Die on error	This check box is cleared by default, meaning to skip the row on error and to complete the process for error-free rows.

Advanced settings

Properties	If you need to use custom configuration for your database, complete this table with the property or properties to be customized. Then at runtime, the customized property or properties will override the corresponding ones used by Talend Studio. For example, you need to define the value of the dfs.replication property as 1 for the database configuration. Then you need to add one row to this table using the plus button and type in the name and the value of this property in this row. Information noteNote: This table is not available when you are using an existing connection by selecting the Using an existing connection check box in the Basic settings view.
tStatCatcher Statistics	Select this check box to collect log data at the component level.

Properties

If you need to use custom configuration for your database, complete this table with the property or properties to be customized. Then at runtime, the customized property or properties will override the corresponding ones used by Talend Studio.

For example, you need to define the value of the dfs.replication property as 1 for the database configuration. Then you need to add one row to this table using the plus button and type in the name and the value of this property in this row.

Note:

This table is not available when you are using an existing connection by selecting the Using an existing connection check box in the Basic settings view.

tStatCatcher Statistics

Select this check box to collect log data at the component level.

Global Variables

Global Variables	NB_LINE: the number of rows read by an input component or transferred to an output component. This is an After variable and it returns an integer. 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 more information about variables, see Using contexts and variables.

NB_LINE: the number of rows read by an input component or transferred to an output component. This is an After variable and it returns an integer.

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 more information about variables, see Using contexts and variables.

Usage

Usage rule	This component can be used as a standalone component.

Did this page help you?

If you find any issues with this page or its content – a typo, a missing step, or a technical error – please let us know!

Leave your feedback here