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Distributed Shared Memory

• Logically, a global address space is provided.
• Physically, the memory is distributed among the processors.
• Remote memory accesses via a scalable network.
• NUMA architectures
  • Non-Uniform Memory Access
  • Local memory can be accessed faster.
• COMA architectures
  • Cache Only Memory Achitecture.
  • All memory transformed into caches.

Scalable shared memory multiprocessors.