公开(公告)号：US10896200B1

公开(公告)日：2021-01-19

申请号：US15198304

申请日：2016-06-30

Applicant: EMC IP Holding Company LLC

Inventor： Suresh Krishnan ,  Wayne D'Entremont ,  Adnan Sahin ,  Arieh Don

IPC: G06F16/27 ,  H04L29/08

Abstract: A distributed data storage system includes first and second data storage systems (DSSs) at respective sites and a cloud gateway at a third. The first DSS remotely mirrors data using synchronous and asynchronous channels both employing a block-based protocol (e.g., SCSI). The second DSS is connected to the synchronous channel to provide synchronous backup to the first DSS. The cloud gateway is connected to the asynchronous channel and has a cloud storage connection to a cloud storage system, the cloud storage connection using a wide area network interface and employing an object-based protocol. The cloud gateway (1) provides asynchronous backup to the first DSS via the asynchronous channel, and (2) uses the cloud storage connection to access object-based cloud data storage to store data of the asynchronous backup. The use of the cloud gateway and cloud storage system for an asynchronous third mirror enhances reliability/resiliency in a cost-effective manner.