Cloudera Docs

Configuring manifest caching in Cloudera Manager

You can enable or disable manifest caching for Impala Coordinators and Catalogd by setting properties in Cloudera Manager.

By default, only 8 catalogs can have their manifest cache active in memory.

To connect to more than 8 HDFS clusters, in Cloudera Manager, configure iceberg.io.manifest.cache.fileio-max in catalogd_java_opts and the coordinator impalad_embedded_java_opts.

In the following task, you enable Iceberg manifest caching for the Impala Coordinator and Catalog Server.

  1. Navigate to Cloudera Manager.
  2. Search for Iceberg.
    By default, manifest caching is enabled, but if you have turned it off, check Impala-1 (Service-Wide) to re-enable.