Cloud Disaster Recovery Challenges

Some common challenges of the cloud disaster recovery are discussed below.

Dependency

Customers are totally dependent on cloud service providers due to lack of control over the system and the data as the data backup is on premises of service providers.

Cost

Cloud service providers annually charge differently for interrelated DR systems as a service operation which annuls the initial cost savings expectation of the consumers.

These costs include the initializing cost, a form of a liquidated annual cost, ongoing cost (storage cost, data transfer cost and processing cost), and disaster cost (charges for recovered disasters and associated cost of unrecoverable disasters).

Failure detection

A failure detection time is expected to be very short so that the system downtime can be adequately managed on time. Hence, it is highly expedient to report a failure immediately when it is detected to facilitate quick DR and reduce system downtime.

Security

Cyber terrorism attacks and natural disasters are major problems. Mechanisms must be developed to protect important data and ensure its recovery in the case of a disaster.

Data storage

Storage single point of failure and data loss are critical challenges to store data in cloud service providers’ DR solutions. To manage this, the following are suggested as potential solutions.

Local backup : An alternative backup plan can be made for both data and complete application at the customer’s end using a Linux box and seamlessly updated through a secured channel. In case of a disaster, the local backup can be leveraged upon for recovery purposes.

Geographical Redundancy and Backup (GRB) : With this approach, two cloud zones, are located at different geographical locations and one synchronously mirrored as  a replication of the another. A monitor is deployed to detect the disaster at each zone. However, it is expensive and unaffordable.

Inter-Private Cloud Storage (IPCS) : This approach provisions three different geographical backup locations for business data storage such that each backup location is dedicated to backup only one of the serves, local backup server (LBS) or remote backup server (RBS).

Resource management

Improved technologies for hardware and software application management must be deployed for seamless critical data DR services. Examples include the use of the fastest disk technology, changing dirty page threshold and replacement of risk devices by determining factors like heat dissipation, power consumption, and carbon credit utilization, and so on form time to time.