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Version: v4

Raft FastLog

Dkron Pro includes support for the Raft FastLog storage engine, which provides significant performance improvements over the default BoltDB storage.

Overview​

Raft FastLog is a high-performance storage engine designed specifically for Raft consensus logs. It offers:

  • Higher throughput - Significantly faster write operations
  • Lower latency - Reduced response times for log operations
  • Better concurrency - Improved performance under concurrent load
  • Memory efficiency - Optimized memory usage patterns

Performance Benefits​

FastLog typically provides:

  • 10-100x faster write performance compared to BoltDB
  • Reduced memory allocation and garbage collection pressure
  • Better scaling characteristics under high load
  • Lower CPU utilization for log operations

Configuration​

To enable Raft FastLog, use the --fast command line option when starting Dkron Pro:

dkron agent --fast

When to Use FastLog​

FastLog is recommended for:

  • High-frequency job scheduling scenarios
  • Large clusters with many nodes
  • Environments requiring low-latency job execution
  • Production deployments with performance requirements

Considerations​

  • FastLog requires Dkron Pro license
  • Log files are not compatible between FastLog and BoltDB engines
  • Ensure adequate disk space for log storage
  • Monitor system resources during initial deployment

Migration​

When switching from BoltDB to FastLog:

  1. Stop all Dkron nodes in the cluster
  2. Backup existing data
  3. Start nodes with --fast flag
  4. The cluster will rebuild its state from scratch

Note: Migration requires cluster restart and state rebuild. Plan accordingly for production environments.