全闪存Ceph的混合优化策略研究OA北大核心CSTPCD

Ceph is a classic distributed storage system,but with the continuous improvement of data and experimental requirements,the lack of read-write delay of Ceph restricts its further development.With the combination of Ceph and new storage media,such as solid state disk(SSD),the overall read-write performance of Ceph has been significantly improved.Non-volatile memory express(NVMe)SSD is an excellent SSD,and Ceph system based on NVMe SSD performs better.Different from the traditional distributed system,the read-write delay of NVMe SSD Ceph isn't l imited by hardware.This paper considers that in the case of NVMe SSD the software stack of Ceph also needs to be optimized to match the improvement of hardware read-write speed.Therefore,this paper proposes a hybrid optimization strategy for NVMe SSD Ceph:in terms of the locking mechanism of Ceph,Crush algorithm etc.The experimental results show that the improvement effect is about 2.8％～4.5％.