公开(公告)号：US20220057954A1

公开(公告)日：2022-02-24

申请号：US17510388

申请日：2021-10-26

Applicant: HUAWEI TECHNOLOGIES CO.,LTD.

Inventor： Wenlin Cui ,  Keji Huang ,  Peng Zhang ,  Siwei Luo

IPC: G06F3/06 ,  G06F12/0802

Abstract: A storage system includes a management node and multiple storage nodes. Each storage node includes a first storage device of a first type (e.g., DRAM) and a second storage device of a second type (e.g., SCM), and a performance level of the first storage device is higher than the second storage device. The management node creates a globe cache including a first tier comprising the first storage device in each storage node, and a second tier comprising the second storage device in each storage node. The first tier is for storing data with a high access frequency, and the second tier is for storing data with a low access frequency. The management node monitors an access frequency of target data stored in the first tier. When the access frequency of the target data is lower than a threshold, the management node instructs the first storage node to migrate the target data from the first tier to the second tier of the globe cache.