The main themes of Jethro 1.6.0 are concurrency and new range-index features.
Concurrency features are:
Reuse of results when the same “where” clause is used by multiple queries, in order to reduce resource consumption and increase concurrency.
Enhanced locking infrastructure to protect against deadlocks during high load.
This new feature allows you to create special indexes for ranges of values. This significantly increases the performance of queries that employ wide range of column values in filters.
Full list of version issues can be found on our release notes page: http://jethro.io/release-notes/
Updated documentation: https://jethrodownload.s3.amazonaws.com/JethroReferenceGuide.pdf