Sky Computing Providers

(i) Appliance Providers – Appliances can integrate the information using any configuration method from any appliance provider. This information in the templates is application specific and potentially different from appliance- to-appliance, but the templates themselves are uniform, and any context broker can process them. Example – Amazon was the first major could providerAmazon Simple Storage Service (Amazon S3), Apple, Cisco, Citrix, IBM, Joyent, Google, Microsoft, Rackspace and Salesforce.

(ii) Cloud Broker – An entity that manages the use, performance and delivery of cloud services and intermediates the relationships between cloud providers and cloud consumers and negotiation, configuration done manually. Example-AWS marketplace from Amazon, Blue Wolf, CloudCompare, CloudMore, which offers cloud services aggregation and activation through partners. The company serves the UK, Sweden, Finland, Denmark, Ireland, and more. Key partners include IBM, Microsoft, HP Autonomy, VMWare, and Cryptozone.

(iii) SaaS (Software as a Service) – It represent the largest cloud market and are still growing quickly. SaaS uses the web to deliver applications that are managed by a third-party vendor and whose interface is accessed on the clients’ side. Examples – Google Apps, Salesforce, Workday, Concur, Citrix Go to Meeting, Cisco Web ExCommon. (iv) PaaS (Platform as a Service) – These are used for applications and other development, while providing cloud components to software. PaaS makes the development, testing, and deployment of applications quick, simple, and cost-effective. With this technology, enterprise operations, or a third- party provider, can manage OSes, servers, storage, networking, and the PaaS software itself. Examples – Engine Yard, RedHat OpenShift, Google App Engine, Heroku, appFog (aF), Windows Azure, Amazon Weg Service(AWS).

(v) IaaS (Infrastructure as a Service) – These are self-service models for accessing, monitoring, and managing remote data center infrastructures, such as compute (virtualized or bare metal), storage, networking, and networking services (e.g. firewalls). Instead of having to purchase hardware outright, users can purchase laaS based on consumption. Example – Amazon Web Services (AWS), Cisco Metapod, Microsoft Azure, Google Compute Engine (GCE).

Sky computing is an emerging computing model where resources from multiple cloud providers are leveraged to create large-scale distributed infrastructures. Sky computing arises as a metaphor to illustrate a layer above cloud computing because such dynamically provisioned distributed domains are built over several clouds.

It can be described as a management up layer of an environment of clouds, offering variable computing capacity and storage resources with dynamic support to real-time demands. Laying a virtual site over distributed resources, combining the ability to trust remote sites with a trusted networking environment, originates a highly elastic response to incoming ests with a seemingly infinite pool of accessible resources.