Date Added: Aug 2012
A new emerging class of parallel DataBase Management Systems (DBMS) is designed to take advantage of the partitionable workloads of On-Line Transaction Processing (OLTP) applications. Transactions in these systems are optimized to execute to completion on a single node in a shared-nothing cluster without needing to coordinate with other nodes or use expensive concurrency control measures. But some OLTP applications cannot be partitioned such that all of their transactions execute within a single-partition in this manner. These distributed transactions access data not stored within their local partitions and subsequently require more heavy-weight concurrency control protocols.