该版本主要进行了bug修复和性能的提升改进并且介绍了数据提取功能
Version 0.9.2 (2013-05-19)
CRITICAL upgrade urgency. This release fixes some critical bugs. It also improves performance and introduces Data Pump.
Open Issues:
Issue #17 - Serializer fails in some cases (writeExternal and readExternal methods)
Changes:
FIX Issue #119 - BTreeMap did not released locks with multiple transactions
FIX Issue #125 - calling close twice failed.
FIX race condition in HTreeMap
ADD ByteBuffer now uses duplicate() instead of synchronization. Better concurrency
ADD Issue #123 - Replace RandomAccessFile by FileChannel and improve performance on 32bit systems.
ADD Delta Packing for tuples
ADD better serialization for small strings
ADD improve Javadoc, use Pegdown Doclet so Javadoc can be written in markdown
ADD reuse DataOutput instances, performance improvement
ADD datapump to create BTreeMap from large unsorted data set in linear time. Checkout Huge_Insert example
ADD improve AsyncWriteEngine performance by removing Write Queue
项目主页：http://www.mapdb.org/
下载地址：https://github.com/jankotek/mapdb
来自:开源中国社区
