This version features:

• resources, identified by an ID, can be acquired and released by a TransactionId in shared or exclusive mode
• resources can have a container, for example a resource can be a RecordId and its container can be a RecordStore
• acquiring a resource also acquired its container
• resource acquisitions can be upgraded or downgraded with certain limitations on upgrade
• the lock manager supports policies including FirstCome, OldestTxFirst, MostBlockingTxFirst, etc.
• stats collected
• blocking, awakening and deadlock detection