Cloud providers vow interoperability
April 10, 2009 —
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Leading SaaS platform providers, and some expected entrants to the market, assert that their respective offerings are or will be interoperable with other clouds. While there is a general consensus behind using existing Web standards to accomplish this, some acknowledged the need for new standards to evolve over time.
In a series of interviews, Amazon, Hewlett-Packard, IBM, Microsoft and Salesforce.com detailed how developers can integrate their services, while acknowledging the challenges posed by constructing composite cloud applications.
Amazon, which provides cloud-based storage and computing services, believes that allowing customers to do "whatever they want" is vital, said Adam Selipsky, vice president of product management and developer relations for Amazon Web Services.
"We are open and continue to be. Customer choice is our philosophy; we offer a la carte services," said Selipsky. He noted that customers can program in any language, and that its emphasis on delivering low-level infrastructure services, such as hosted environments, does not force customers to make choices that only apply to that environment.
Infrastructure as a service, or virtualization as a paradigm for deployment, is a situation where a lot of existing interoperability work that the industry has done will surely work to allow integration of services, said Karla Norsworthy, vice president of software standards at IBM.
Over time, as vendors and customers learn more, standards for cloud computing will crystallize. "Whether existing standards can be transferred to this case [of cloud computing] or if it's a new topic is [too] early to say," Selipsky said.
"We have to see what we can do with what we have," said Norsworthy. She believes that existing Web service standards like WS-Identity and WS-Security could suffice for cloud computing, depending on the kind of workloads that customers put in cloud.
"That's provided everyone pulls up to the table and doesn't introduce things that cause those [aforementioned standards] to no longer work in cloud implementations," she cautioned.
The industry is already moving down the path of using existing standards for cloud computing, said Steven Martin, senior director of developer platform product management at Microsoft. "REST, ATOM, XML and SOAP are core to many cloud efforts already."
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