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E-MapReduce:Manage configuration items

Last Updated:Sep 21, 2026

This topic describes how to modify and add configuration items.

Prerequisites

An EMR on ACK cluster has been created. For more information, see Getting started.

Modify a configuration item

  1. Navigate to the configuration page.

    1. Log on to the EMR on ACK console.

    2. On the EMR on ACK page, click Configure in the Actions column of the target cluster.

  2. In the search box, enter the configuration item that you want to modify and update its value.

  3. Save the configuration.

    1. Click Save.

    2. In the pop-up dialog box, enter an Execution Reason, and click Save.

  4. Deploy the configuration.

    1. Click Deploy Client Configuration.

    2. In the dialog box that appears, enter the Execution Reason and click OK.

    3. In the Confirm dialog box, click OK.

    Note

    In Spark clusters, configurations provide default parameters for jobs. Parameters in a YAML job override these defaults. The updated configuration affects only jobs submitted after the change, not previously submitted ones. For Shuffle Service clusters, a new configuration takes effect only after the components are restarted. For more information, see Restart components of a cluster.

Add configuration items

  1. Navigate to the configuration page.

    1. Log on to the EMR on ACK console.

    2. On the EMR on ACK page, click Configure in the Actions column of the target cluster.

  2. Add configuration items.

    1. On the Configure page, click the desired tab.

    2. Click Add Configuration Item.

    3. Add the configuration item information as required and click OK.

      You can add multiple configuration items at once.

      Parameter

      Description

      Key

      The name of the parameter.

      Value

      The value of the parameter.

      Description

      A description for the parameter.

      Actions

      Click the delete icon to remove the configuration item.

    4. In the dialog box that appears, enter the Execution Reason and click Save.

  3. Deploy the configuration.

    1. Click Deploy Client Configuration.

    2. In the dialog box that appears, enter the Execution Reason and click OK.

    3. In the Confirm dialog box, click OK.