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From: fredt <fr...@us...> - 2005-08-30 19:47:50
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HSQLDB is breaking new ground! I am pleased to (pre) announce the HSQLDB 1.9.x series, featuring Multiversion Concurrency Control. In this series, all rows involved in transactions include the full change history. This allows multi-threaded, non-blocking reads and writes, with conflict detection on commit. The new architecture allows two new transaction isolation modes: Snapshot Isolation and Read Consistency Isolation, which are respectively and approximately equivalent to Repeatable Reads and Read Committed isolation levels. Read Uncommitted will continue to be supported. The first alpha release of the new series will be available from the file download page by the end of the week. Fred Toussi Maintainer, HSQLDB Project http://hsqldb.org |