Updated on 2023-06-14 GMT+08:00

MRS Spark

Function

The MRS Spark node is used to execute a predefined Spark job on MRS.

Parameters

Table 1, Table 2, and Table 3 describe the parameters of the MRS Spark node.

Table 1 Parameters of MRS Spark nodes

Parameter

Mandatory

Description

Node Name

Yes

Name of the node. The value must consist of 1 to 128 characters and contain only letters, digits, and the following special characters: _-/<>

MRS Cluster Name

Yes

Select the MRS cluster.

To create an MRS cluster, use either of the following methods:
  • Click . On the Clusters page, create an MRS cluster.
  • Go to the MRS console to create an MRS cluster.

Spark Job Name

Yes

Name of an MRS job. The name contains 1 to 64 characters, including only letters, digits, and underscores (_).

NOTE:

The job name cannot contain more than 64 characters. If the job name does not meet requirements, the MRS job will fail to be submitted.

JAR Package

Yes

Select JAR package. Before selecting a JAR package,upload the JAR package to the OBS bucket, create a resource on the Manage Resource page, and add the JAR package to the resource management list. For details, see Creating a Resource.

JAR File Parameters

No

Parameters of the JAR package.

Program Parameter

No

Used to configure optimization parameters such as threads, memory, and vCPUs for the job to optimize resource usage and improve job execution performance.

NOTE:

This parameter is mandatory if the cluster version is MRS 1.8.7 or later than MRS 2.0.1.

For details about the program parameters of MRS Spark jobs, see Managing an Existing Cluster > Job Management > Running a Spark Job in the MapReduce Service (MRS) User Guide.

Input Data Path

No

Path where the input data resides.

Output Data Path

No

Path where the output data resides.

Table 2 Advanced parameters

Parameter

Mandatory

Description

Node Status Polling Interval (s)

Yes

How often the system checks completeness of the node task. The value ranges from 1 to 60 seconds.

Max. Node Execution Duration

Yes

Maximum duration of executing a node. When Retry upon Failure is set to Yes for a node, the node can be re-executed for numerous times upon an execution failure within the maximum duration.

Retry upon Failure

Yes

Whether to re-execute a node after the node fails to be executed.

  • Yes: The node will be re-executed after it fails to be executed. The following parameters must be configured:
    • Maximum Retries
    • Retry Interval (seconds)
  • No: The node will not be re-executed. This is the default setting.
NOTE:

If Max. Node Execution Duration is configured for the node, the node will not be executed again after the execution times out. Instead, the node is set to the failure state.

Failure Policy

Yes

Policies to be performed after the node fails to be executed:

  • End the current job execution plan: stops running the current job. The job instance status is Failed.
  • Go to the next node: ignores the execution failure of the current node. The job instance status is Failure ignored.
  • Suspend current job execution plan: suspends running the current job. The job instance status is Waiting.
  • Suspend execution plans of the subsequent nodes: stops running subsequent nodes. The job instance status is Failed.

Dry run

No

If you select this option, the node will not be executed, and a success message will be returned.

Table 3 Lineage

Parameter

Description

Input

Add

Click Add. In the Type drop-down list, select the type to be created. The value can be DWS, OBS, CSS, HIVE, DLI, or CUSTOM.

  • DWS
    • Connection Name: Click . In the displayed dialog box, select a DWS data connection.
    • Database: Click . In the displayed dialog box, select a DWS database.
    • Schema: Click . In the displayed dialog box, select a DWS schema.
    • Table Name: Click . In the displayed dialog box, select a DWS table.
  • OBS
    • Path: Click . In the displayed dialog box, select an OBS path.
  • CSS
    • Cluster Name: Click . In the displayed dialog box, select a CSS cluster.
    • Index: Enter a CSS index name.
  • HIVE
    • Connection Name: Click . In the displayed dialog box, select a HIVE data connection.
    • Database: Click . In the displayed dialog box, select a HIVE database.
    • Table Name: Click . In the displayed dialog box, select a HIVE table.
  • CUSTOM
    • Name: Enter a name of the CUSTOM type.
    • Attribute: Enter an attribute of the CUSTOM type. You can add more than one attribute.
  • DLI
    • Connection Name: Click . In the displayed dialog box, select a DLI data connection.
    • Database: Click . In the displayed dialog box, select a DLI database.
    • Table Name: Click . In the displayed dialog box, select a DLI table.

OK

Click OK to save the parameter settings.

Cancel

Click Cancel to cancel the parameter settings.

Modify

Click to modify the parameter settings. After the modification, save the settings.

Delete

Click to delete the parameter settings.

View Details

Click to view details about the table created based on the input lineage.

Output

Add

Click Add. In the Type drop-down list, select the type to be created. The value can be DWS, OBS, CSS, HIVE, DLI, or CUSTOM.

  • DWS
    • Connection Name: Click . In the displayed dialog box, select a DWS data connection.
    • Database: Click . In the displayed dialog box, select a DWS database.
    • Schema: Click . In the displayed dialog box, select a DWS schema.
    • Table Name: Click . In the displayed dialog box, select a DWS table.
  • OBS
    • Path: Click . In the displayed dialog box, select an OBS path.
  • CSS
    • Cluster Name: Click . In the displayed dialog box, select a CSS cluster.
    • Index: Enter a CSS index name.
  • HIVE
    • Connection Name: Click . In the displayed dialog box, select a HIVE data connection.
    • Database: Click . In the displayed dialog box, select a HIVE database.
    • Table Name: Click . In the displayed dialog box, select a HIVE table.
  • CUSTOM
    • Name: Enter a name of the CUSTOM type.
    • Attribute: Enter an attribute of the CUSTOM type. You can add more than one attribute.
  • DLI
    • Connection Name: Click . In the displayed dialog box, select a DLI data connection.
    • Database: Click . In the displayed dialog box, select a DLI database.
    • Table Name: Click . In the displayed dialog box, select a DLI table.

OK

Click OK to save the parameter settings.

Cancel

Click Cancel to cancel the parameter settings.

Modify

Click to modify the parameter settings. After the modification, save the settings.

Delete

Click to delete the parameter settings.

View Details

Click to view details about the table created based on the output lineage.