Berkeley DB Java Edition
Release Notes

4.0.71, November 04, 2009

Overview

Berkeley DB Java Edition (JE) is a 100% pure Java embedded, transactional data store. It supplies a key/value data model with indexing, full transactional ACID support and POJO APIs.

This is release 4.0.71 of Berkeley DB Java Edition. Key changes since version JE 3.3.* are summarized below; the complete list of changes can also be found in the change log page.

Log File On-Disk Format Changes:

JE 4.0.71 has moved to on-disk file format 7.

The change is forward compatible in that JE files created with release 3.3.* and earlier can be read when opened with JE 4.0. The change is not backward compatible in that files created with JE 4.0 cannot be read by earlier releases.

Changes in API and exception handling create a binary incompatibility between JE 4.0 and JE 3.X. Users are advised to recompile their applications when moving to JE 4.0. Please see the API Changes section of the change log for a complete description.

New Work:

• This release features JE High Availability, which permits the use of JE with replication. See the High Availability Guide for an introduction to the product. and the com.sleepycat.je.rep javadoc for API specifications.


• JE now provides two JMX MBean implementations for monitoring a running JE application. A JConsole plugin is also provided for accessing the new JEMonitor and RepJEMonitor classes. Environment statistics can be collected and graphed, and other state information can be perused. See the how-to for more information.


• Multiple performance improvements for concurrent execution, including group commit performance improvements on Linux ext3 file systems.


• Support for enum keys and other improvements in the Direct Persistence Layer.


• Enhanced exception handling and other API improvements.

See the change log for the complete and detailed description of all changes.