Transactions in distributed shared memory systems

The authors propose a distributed shared memory model based on a paged segmented two-level address space and an extended set of memory operations. In addition to the traditional read and write operations, the memory model includes operations which support mapping between local and global address spaces and mapping of processes to transactions. An architecture and associated algorithm are outlined for a virtual memory management unit to provide concurrency control for transactions. Although the traditional concept of the transaction is assumed, only the aspects of concurrency control and coherence are addressed