SYSTEM AND METHOD FOR FAULT-TOLERANT BLOCK DATA STORAGE

摘要

The present disclosure provides methods and systems for fault-tolerant storage of data, where the level of fault tolerance is selectable at the block level. A method includes receiving a request to write data, the data comprising a plurality of data blocks. Each data block is written to a number of storage devices as a set of k primary blocks. A number (represented by m - k) of erasure- coded blocks are calculated and written to separate storage devices. The values of m and/or k can varied for each data block of the data.