Functional Minimum Storage Regenerating Codes For Multi-Cloud Failure

This paper reduces the network repair traffic and recovery from multiple node failures in a cloud storage environment. Suppose if a cloud suffers from permanent failure and loses all its data by more than one node, then we need to regenerate the lost data with the help of the other neighboring clouds. We design a proxy based storage system for fault tolerant multiple cloud storage called NC cloud, which achieves reduction in repair traffic for a permanent multi cloud failure. Functional minimum storage regenerating [FMSR] codes is used for regenerating data in multicloud failure. we also prove that FMSR codes reduces repair traffic and incur less monitory cost during data transfer than Erasure [RAID-6] codes and EMSR [exact minimum storage regenerating] codes.