MRS Spark Python
Functions
The MRS Spark Python node is used to execute a predefined Spark Python job on MRS.
For details about how to use the MRS Spark Python operator, see Developing an MRS Spark Python Job.
Parameters
Table 1, Table 2, and Table 3 describe the parameters of the MRS Spark Pythonnode node.
Parameter |
Mandatory |
Description |
---|---|---|
Node Name |
Yes |
Name of a node. The name must contain 1 to 128 characters, including only letters, numbers, underscores (_), hyphens (-), slashes (/), less-than signs (<), and greater-than signs (>). |
Job Name |
Yes |
MRS job name. It can contain a maximum of 64 characters. Only letters, digits, hyphens (-), and underscores (_) are allowed. The system can automatically enter a job name in Job name_Node name format.
NOTE:
The job name cannot contain Chinese characters or more than 64 characters. If the job name does not meet requirements, the MRS job will fail to be submitted. |
Script Type |
Yes |
|
MRS Cluster Name |
Yes |
Select an MRS cluster that supports Spark Python. Only a specific version of MRS supports Spark Python. Test the cluster first to ensure that it supports Spark Python.
To create an MRS cluster, use either of the following methods:
For details about how to create a cluster, see Buying a Custom Cluster in MapReduce Service (MRS) Usage Guide. |
MRS Resource Queue |
No |
Select a created MRS resource queue.
NOTE:
Select a queue you configured in the queue permissions of DataArts Security. If you set multiple resource queues for this node, the resource queue you select here has the highest priority. |
SQL Script |
Yes |
This parameter is available only when Script Type is set to Online. Select a Spark Python script. |
Script Parameter |
No |
This parameter is available only when Script Type is set to Online. If the associated Spark Python script uses a parameter, the parameter name is displayed. Set the parameter value in the text box next to the parameter name. |
Program Parameter |
No |
This parameter is available only when Script Type is set to Online. 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 Running a Spark Job in the MapReduce Service User Guide. |
Parameter |
Yes |
This parameter is available only when Script Type is set to Offline. Enter parameters. Press Enter between parameters. |
Execution Program Parameter |
No |
Enter parameters of the MRS execution program. Use spaces to separate parameters. To prevent parameters from being saved as plaintext, add an at sign (@) before parameters. |
Attribute |
No |
Enter parameters in the key=value format. Use Enter to separate multiple parameters. |
Parameter |
Mandatory |
Description |
---|---|---|
Max. Node Execution Duration |
Yes |
Execution timeout interval for the node. If retry is configured and the execution is not complete within the timeout interval, the node will be executed again. |
Retry upon Failure |
Yes |
Whether to re-execute a node if it fails to be executed. Possible values:
|
Policy for Handling Subsequent Nodes If the Current Node Fails |
Yes |
Operation that will be performed if the node fails to be executed. Possible values:
|
Enable Dry Run |
No |
If you select this option, the node will not be executed, and a success message will be returned. |
Task Groups |
No |
Select a task group. If you select a task group, you can control the maximum number of concurrent nodes in the task group in a fine-grained manner in scenarios where a job contains multiple nodes, a data patching task is ongoing, or a job is rerunning. |
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. |
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. |
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. |
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