OpenMP program on different hosts

Question

I want to know if it would be possible to run an OpenMP program on multiple hosts. So far I only heard of programs that can be executed on multiple thread but all within the

Answer 1

Before, there was the Cluster OpenMP.

Cluster OpenMP, was an implementation of OpenMP that could make use of multiple SMP machines without resorting to MPI. This advance had the advantage of eliminating the need to write explicit messaging code, as well as not mixing programming paradigms. The shared memory in Cluster OpenMP was maintained across all machines through a distributed shared-memory subsystem. Cluster OpenMP is based on the relaxed memory consistency of OpenMP, allowing shared variables to be made consistent only when absolutely necessary. source

Performance Considerations for Cluster OpenMP

Some memory operations are much more expensive than others. To achieve good performance with Cluster OpenMP, the number of accesses to unprotected pages must be as high as possible, relative to the number of accesses to protected pages. This means that once a page is brought up-to-date on a given node, a large number of accesses should be made to it before the next synchronization. In order to accomplish this, a program should have as little synchronization as possible, and re-use the data on a given page as much as possible. This translates to avoiding fine-grained synchronization, such as atomic constructs or locks, and having high data locality source.