Technology market is continuing a rapid growth phase where different resource providers and Cloud Management Frameworks are positioning to provide ad-hoc solutions-as management interfaces, information discovery or billing-trying to differentiate from competitors resulting in incompatibilites between them when addressing more complex scenarios like federated clouds.Therefore, grasping interoperability problems present in current infrastructures by studying how existing and emerging standards could enhance the cloud user experience.In this paper we will review the current open challenges in Infrastructure as a Service cloud interoperability and federation, as well as point to the potential standards that should alleviate these problems. We will describe the main challenges regarding cloud federation and in-teroperability.We will showcase and review the existing and emerging standards that can be use to tackle the gaps in cloud federations.
There are many non academic works regarding the need or lack thereof for a . However, authors agree that there would be not such a unique standard to rule all the cloud aspects. Some preliminary work regarding the need of standards for the cloud has been done in the past @cite_26 @cite_47 .
@cite_47 @cite_26
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Cloud computing has gaining importance in the recent past due to the conjunction of well-known key features, such as virtualization and pay-by-use, which together form an innovative concept. Even if cloud computing does not have a widely accepted definition, it has been used for many companies to deploy its infrastructures and promote their business. However, the lack of standards seems to be a drawback related to interoperability and optimization issues. Convenient actions like changing cloud providers, and or exchange data information between clouds may be an arduous work for its customers. Therefore, this paper presents major considerations regarding the lack of cloud standards and pointing why this is considered to be a problem. Furthermore, scenarios are discussed, which are desired to make use of cloud interoperabilityand which are currently initiatives addressing cloud standards issues. This leads to a set of important observations towards a solution solving the interoperability and standardization problem. The greatest challenge beyond trust and security for the long-term adoption of cloud computing is the interoperability between clouds. In the context of world-wide tremendous activities against the vendor lock-in and lack of integration of cloud computing services, keeping track of the new concepts and approaches is also a challenge. We considered useful to provide in this paper a snapshot of these concepts and approaches followed by a proposal of their classification. A new approach in providing cloud portability is also revealed.