Cloudera Docs

Enable hedged reads for HBase

You need to enable hedged read if a read operation from a HDFS block is slow.

  1. Go to the HBase service.
  2. Click the Configuration tab.
  3. Select Scope > HBASE-1 (Service-Wide).
  4. Select Category > Performance.
  5. Configure the HDFS Hedged Read Threadpool Size and HDFS Hedged Read Delay Threshold properties. The descriptions for each of these properties on the configuration pages provide more information.
  6. Enter a Reason for change, and then click Save Changes to commit the changes.