新型非易失相变存储器PCM应用研究

并行I/O技术有效优化了I/O性能,但对访问延迟却难以控制.相变存储器(phase change memory,PCM)作为一种SCM(storage class memory),具有非易失性、随机可读写、低延迟、高吞吐率、体积小和低功耗的特点,为I/O性能优化提供了最直接有效的途径.研究了PCM的特性与存在的问题,总结了目前PCM的应用研究进展,针对高性能计算中的并行I/O问题,提出了一种基于相变存储器PCM的层次式并行混合存储模型,能够有效提高并行文件系统元数据服务效率和并行I/O吞吐率.

Application Research on New Non-Volatile Phase Change Memory PCM

Parallel I/O has optimized I/O performance effectively, but it is difficult to reduce the access latency. The Phase Change Memory, as a sort of SCM(Storage Class Memory), has distinct characters of non-volatile, randomly read and write, low latency, high throughput, small volume and low power consumption, it provides a direct and effective way for optimizing the I/O performance. In this paper, the PCM’s characteristics and problems existed are studied, some research progress on PCM application are summarized. To solve parallel I/O problems, a hierachical parallel I/O storage model based on PCM is introduced, which can improve the efficiency on metadata service and the throughput of parallel I/O in parallel file system.