I. Introduction
Recently, disaggregated storage has been widely deployed in modern data center to satisfy the increasing demand for huge data storage volume of ML and big data processing [1], [2]. Unlike traditional storage systems, such as direct-attached storage and storage area networks (SAN), in which capacity expansion is limited by physical drive bays and expansion chassis, disaggregated storage is a flexible and scalable solution since a number of storage devices can be allocated to any server using a high-speed network fabric.