A REVIEW ON DATA MIGRATION IN PUBLIC CLOUD

Cloud computing has recently became a widely discussed topic in the IT industry. More and more organizations consider using the Cloud, because it enables an easy and cost efficient way of hosting applications, with dynamic scaling and geographical distribution possibilities. Still, it is not clear how and when cloud computing should be used. Existing application are often written in a way that does not really fit a cloud environment well. Also, certain quality attributes (e.g. performance, security or portability) can be affected. More studies are needed on how existing systems should be plugged into the Cloud and what are the consequences of the migration. Data migration and application migration are one of popular technologies that enable computing and data storage management to be autonomic and self - managing. we examine important issues in designing and developing scalable architectures and techniques for efficient and effective data migration and application migration. The first contribution we have made is to investigate the opportunity of automated data migration across multi - tier storage systems.