Enabling on-demand metadata fetch

Use Cloudera Manager to enable on-demand metadata fetch for Impala.

By: Manish Maheshwari, Data Architect and Data Scientist at Cloudera, Inc.

To enable on-demand metadata fetch in Cloudera Manager:

  1. In Cloudera Manager Admin Console, click IMPALA.
  2. Click the Configuration tab.
  3. Search for catalogd.
  4. Scroll down to locate the Catalog Server Command Line Argument Advanced Configuration Snippet (Safety Valve), and enter the following configuration information into the text box:

    --catalog_topic_mode_minimal
  5. Search for impalad.
  6. Scroll down to locate the Impala Daemon Command Line Argument Advanced Configuration Snippet (Safety Valve), and enter the following configuration information into the text box:

    --use_local_catalog=true
  7. Click Save Changes at the bottom right corner of the page.
  8. Scroll up to the top of the page and click the refresh icon to restart the services so your configuration changes can take effect: