Following the big success of Amazon, Google or salesforce.com and their cloud services for business, new specialized backup providers like Mozy or Zmanda have appeared. This fact has fostered innovation in storage technologies aligned with the cloud paradigm. Data deduplication reduces the total used disk space by only storing each duplicated data fragment, yielding 70% savings. Thin provisioning technology allows the creation of overasigned storage space disks, by lending unused free space to other users. The virtualization of servers, applications, disks or networks allows a better usage of the hardware resources. In addition, Continuous Data Protection (CDP) allows copying every single change in the disks, permitting recovery since any instant.
Nevertheless there are still challenges in this field. For example, denying data to the cloud provider or an attacker, or total recovery of datacenter services in the cloud (the so-called Disaster Recovery/Business Continuity). Another relevant problem is bandwidth limitation, which creates a dependency on the access network. Furthermore, many customers dislike SLA contract conditions and fulfillment guarantees by the providers.
Gradiant has accumulated a strong experience in security and fault tolerance in Cloud Computing. It is currently participating in research projects on technologies enabling datacenter backups in the cloud.