Enabling Multi-Level Data Fault Tolerance on Software-Defined Storage System

Nowadays, people rely heavily on local or cloud storage to store their data digitally. To ensure data safety, various data fault tolerance mechanisms have been widely studied and deployed to provide reliability. Data fault tolerance mechanisms incur additional cost to the storage system. Therefore, data of different importance should be stored on storage that provides different levels of fault tolerance to lower the system cost. Researchers have been studying and proposing different studies and services to exploit the benefits brought by SDS; however, there is little discussion on coexisting multiple data fault tolerance on a single SDS disk group to satisfy different fault tolerance requirement. Furthermore, coexisting two or multiple data fault tolerance mechanisms directly on the same disk group could cause management issues. To address the above issues, this study enables multilevel data fault tolerance on a single disk group.