2) Design and implement system prototypes. The optimal node is selected as the routing node by matching the BloomFilter, and the storage capacity of the node and maintained in the memory of the storage node. According to Broder’s theorem, k leastsized fingerprints are selected as the Superchunk features and send to the storage node. 1)Superchunk is used as the basic unit of data routing to improve system throughput. Therefore, this paper proposes a data routing strategy based on distributed Bloom Filter.
The application of data routing strategy can well balance the problem of deduplication rate and load balancing. However, the cluster data duplication technology also brings new issues on deduplication rate reduction and load balancing of storage nodes.
Compared with limited storage capacity and computing capacity of a single node, cluster data deduplication technology has great advantages. The application of data deduplication technology reduces the demand for data storage and improves resource utilization. Our experimental evaluation, based on a prototype implementation, shows that our scheme can improve data reduction efficiency over the state-of-the-art methods by shortening the backup window size to 33%~75%, and its security mechanism for sensitive applications has negligible impact on backup window size. It can speedup backup operations by application-aware client-side data reduction technique, and mitigate data security risks by integrating selective encryption into data reduction for sensitive applications. In this paper, we present Pangolin, a secure and efficient cloud backup service for personal data storage by exploiting application awareness.
However, client-side data reduction in cloud backup services faces efficiency and privacy challenges. Data reduction techniques, such as deduplication, delta encoding, and Lempel-Ziv (LZ) compression, performed at the client side before data transfer can help ease cloud backup by saving network bandwidth and reducing cloud storage space. Cloud backup has been an important issue ever since large quantities of valuable data have been stored on the personal computing devices.
0 kommentar(er)
