A high performance file system for non-volatile main memory

Abstract

Emerging non-volatile main memories (NVMMs) provide data persistence at the main memory level. To avoid the double-copy overheads among the user buffer, the OS page cache, and the storage layer, state-of-the-art NVMM-aware file systems bypass the OS page cache which directly copy data between the user buffer and the NVMM storage. However, one major drawback of existing NVMM technologies is the slow writes. As a result, such direct access for all file operations can lead to suboptimal system performance.