公开(公告)号：US20230325378A1

公开(公告)日：2023-10-12

申请号：US17716093

申请日：2022-04-08

Applicant: Google LLC

Inventor： Lavina Jain ,  Sean Quinlan

IPC: G06F16/23 ,  G06F16/27

CPC classification number: G06F16/2365 ,  G06F16/2322 ,  G06F16/273

Abstract: Generally disclosed herein is an approach to migrate data from a first type of distributed system to a second type of distributed system without locking data, where transactional dual writes are not available across the two systems. The approach starts by setting up a bi-directional replication between the first system and the second system. The first system will initially operate as a primary system, where the primary system receives and serves write requests from clients or other devices. For each write to the first system, the second system is updated with an asynchronous write. When the second system is caught up to the first system, such that both the first and second systems reflect approximately the same data, the second system can be switched over to serve as the primary system. The second system can now directly receive and serve all future read and write requests.