Cloudera Docs

Relax WAL durability

You can tune the performance of Operational Database powered by Apache Accumulo (OpDB) by relaxing Write Ahead Log (WAL) durability.

For increased write throughput, use the BatchWriter API to ingest data into OpDB. However, using this API reduces data durability. Use this setting only in environments with reliable UPS.

For more information about durability performance, see Durability Performance Implications.

  1. In Cloudera Manager, select the Accumulo on CDP service.
  2. Click Configuration and then click View and Edit.
  3. Search for Tablet Server accumulo.properties.
  4. Find Tablet Server Advanced Configuration Snippet (Safety Valve) for accumulo.properties property.
  5. Set the following: 
    table.durability=flush
  6. Save your changes.
  7. Restart Stale Services.