The Difference Between Public, Private and Hybrid Cloudposted by Anna Mar, May 22, 2013
Technology terms are always in flux. Popular ideas such as cloud computing get twisted, turned and flipped upside down before anyone can agree on common definitions.
It's refreshing to step back from the conversation once in a while for a back-to-basics sanity check.
Here's an important one: the difference between public, private and hybrid cloud.
Public CloudCloud first emerged as an architectural approach on the public internet.
Cloud architecture solved a problem for internet pioneers: how to handle millions of concurrent users and process big data sets at high speed.
Cloud computing is an architectural model that wraps many physical resources in a single service.
Private CloudCloud architecture has several advantages over traditional computing models.
Cloud has economic benefits driven by increased automation and economies of scale. It also has superior performance characteristics such as scalability and fault tolerance. Cloud approaches can also process big data sets at high speed.
All in all, cloud is a superior approach to computing.
Early cloud services were consumer-focused. However, it wasn't long before business services were available on the public cloud.
Many organizations have security, integration and data privacy concerns about public cloud. They don't want their critical business data traversing or stored on the internet. Many businesses view their IT services as proprietary secrets that they don't feel comfortable entrusting to third parties.
For these reasons, many organizations develop their own clouds.
Hybrid CloudHybrid cloud is a mixed approach whereby an organization has both public and private cloud services that are integrated. Typically, organizations deploy mission critical, proprietary services to private cloud and less critical services to public cloud.
Security and data privacy requirements are primary considerations in the mix between public and private cloud.
This is the 6th in a 12-part series of posts called How to Win at Cloud.
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