Preservation Mechanism of Electronic Record Based on Erasure Code and Multi Copies in Cloud Storage

摘要

With the rapid growth of cloud storage center, the cumulative volume of data reaches EB and even ZB from PB. As a result, both network size and the number of storage nodes continue to grow explosively, while the data failure rate is still increasing. Cloud storage centers encode the raw data into erasure codes, to save the system overhead as much as possible meanwhile guarantee the reliability of data. However, the state-of-art erasure codes techniques still rely on a conventional centralized model which results in unaf-fordable encoding/decoding cost, and thus cannot adapt to the data-intensive processing requirements for distributed cloud storage environments. In the paper, the preservation mechanism of combining erasure code and copy backup is proposed, to improve the reliability of electronic records in cloud storage. This paper focuses on the erasure code archiving of electronic documents and puts forward the ability aware erasure code filing of electronic documents. Moreover, the corresponding implementation algorithm and steps are described.