# tMapRDBOutput Standard properties These properties are used to configure tMapRDBOutput running in the Standard Job framework. The Standard tMapRDBOutput 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 | Properties | Description | | --- | --- | | 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. | | 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
checkbox, 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. | | Schema and Edit
schema | | | Set table Namespace mappings | Enter the string to be used to construct the mapping between an Apache HBase table and a
MapR table.

For the valid syntax you can use, see http://doc.mapr.com/display/MapR40x/Mapping+Table+Namespace+Between+Apache+HBase+Tables+and+MapR+Tables. | | Table name | Type in the name of the HBase table you need to create. | | Action on table | Select the action you need to take for creating a table. | | Custom Row Key | Select this check box to use the customized row keys. Once selected, the corresponding
field appears. Then type in the user-defined row key to index the rows
of the table being created.

For example, you can type in
"France"+Numeric.sequence("s1",1,1) to produce the
row key series: *France1*,
*France2*, *France3* and so on. | | Families | Complete this table to specify the column or columns to be created
and the corresponding column family or families they belong to
respectively. The Column column of
this table is automatically filled once you have defined the
schema. | | 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 | Description | | --- | --- | | Use batch mode | Select this check box to activate the batch mode for data processing. | | Batch size | Specify the number of records to be processed in each batch.

This field is available only when the Use batch mode
check box is selected. | | 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. | | Family parameters | Type in the names and, when needs be, the custom performance options of the column
families to be created. This feature leverages attributes defined by the
HBase data model, so for further explanation about these options, see
Apache HBase documentation.

Information noteNote: The parameter Compression type allows you to select the
format for output data compression. | ## Global Variables | Variables | Description | | --- | --- | | 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 checkbox is
cleared, if the component has this checkbox.

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](https://help.qlik.com/talend/r/en-US/8.0/studio-user-guide/contexts-and-variables). | ## Usage | Usage guidance | Description | | --- | --- | | **Usage rule** | This component is normally an end component of a Job and always
needs an input link. | | Prerequisites | Before starting, ensure that you have met the Loopback IP prerequisites expected by your
database.

The Hadoop distribution must be properly installed, so as to guarantee the interaction
with *Talend Studio*. The following list presents MapR related information for
example.



For further information about how to install a Hadoop distribution, see the manuals
corresponding to the Hadoop distribution you are using. |