Distributed Storage Hash Algorithm (DSHA) for File-Based Deduplication in Cloud Computing

Abstract

Increasing volume of digital data in cloud storage demands more storage space and efficient technique to handle these data. Duplicate is unavoidable while handling huge volume of data. Data Deduplication is an efficient approach in cloud storage environment that utilizes different techniques to deal with duplicate data. Existing systems generate the hash value by using any kind of cryptographic hash algorithms such as MD5 or Secure hash algorithms to implement the De-duplication approach. These algorithms produce fixed length of 128 bit or 160 bit as output respectively in order to identify the presence of duplication. So, an additional memory space is used to store this hash value. In this paper, an efficient Distributed Storage Hash Algorithm (DSHA) has been proposed to lessen the memory space occupied by the hash value which is utilized to identify and discard redundant data in cloud. Experimental analysis shows that the proposed strategy, reduces memory utilization of hash value and improves data read/write performance.