• Release Notes for Release 4.2.2
• API Documentation

Apache BookKeeper documentation

• Overview
• Getting started
• Programmer's Guide
• Bookie Server Configuration Parameters
• BookKeeper Configuration Parameters
• BookKeeper Internals
• Bookie Recovery
• Using BookKeeper stream library
• BookKeeper Metadata Management

BookKeeper Admin & Ops

• Admin Guide
• BookKeeper JMX

Apache Hedwig documentation

• Building Hedwig, or how to set up Hedwig
• User's Guide, or how to program against the Hedwig API and how to run it
• Developer's Guide, or Hedwig internals and hacking details
• Configuration parameters
• Message Filtering
• Hedwig Metadata Management

Hedwig Admin & Ops

• Hedwig Console
• Hedwig JMX

Metastore documentation

• Metastore Interface