Storage Systems for Storage-Class Memory
نویسنده
چکیده
Emerging device technologies including phase-change-memory (PCM), spin-torgue transfer RAM (STT-RAM) and memristors promise high-speed storage. These technologies collectively are termed storage-class memory (SCM) as data can be accessed through ordinary load/store instructions rather than through I/O requests. Hence, user-mode code can access data directly, so there is no need for the OS to mediate every access. Furthermore, existing virtual memory hardware can protect access to individual data pages. The existing OS structure of file systems as a kernellevel service may no longer be necessary with storage class memory, and causes unneeded complexity and lower performance. We propose rewriting the storage stack to create a new flexible, highperformance storage architecture enabled by storage-class memory.
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