In this paper, we comprehensively analyze the vertical and horizontal extensions of existing memory hierarchy. The difference between memory and big memory is well reported. We present the state-of-the-art studies upon the big memory systems, together with design methodology and implementations. Persistence is the first principle of big memory systems. We further show the full-stack and moving persistence.

翻译：本文全面分析了现有内存层次结构的纵向与横向扩展，详细阐述了内存与大内存之间的区别。我们梳理了大内存系统的最新研究进展，及其设计方法论与实现方案。持久性是大内存系统的首要原则，进一步展示了全栈持久性与移动持久性。