SMARC:一种结合SLC和MLC的混合固态盘架构

SMARC: exploit SLC and MLC cells complementarily and effectively within one architecture

提出了一种新的内部混合架构的SSD(SMARC),它同时包含SLC和MLC闪存体,而不是只有SLC或MLC。通过定期在两个不同部分(SLC和MLC区域)之间根据运行的工作负载动态迁移数据,所提出的架构能够充分利用各自的优势互补,以提高系统整体的性能、可靠性和能源消耗。关于各种工作负载的仿真结果显示出,SMARC可以有效地改善近一个数量级的性能,同时,显著地提高可靠性和减少能源消耗。而且,SMARC可以很容易地扩展以提供各种差异化的存储服务,为现代存储系统提供重要的应用。

This paper presented a novel internally hybrid SSD architecture（SMARC） which consisted of both SLC and MLC flash memory packages, instead of only either SLC or MLC. By periodically migrating data between the two different portions （ SLC and MLC space） according to running workloads dynamics, the proposed architecture was able to exploit their respective advantages complementarily to help overall performance, reliability and energy consumption. The simulation results of a variety of workloads shows that SMARC can improve the performance by nearly an order of magnitude. At the same time, it signifi- cantly enhances reliability and reduces energy consumption. Furthermore, SMARC can be easily extended to provide differen- tiated storage services and provide important im131ications for modern storage systems.