The term hybrid cloud is used to refer to a combination of public and private clouds that are tailored to suit an organization's specific business needs. As a minimum, a single private cloud and single public cloud are all that are required to create a hybrid cloud computing platform.
However, organizations can always combine multiple private and public clouds to suit the business' requirements.
A public cloud enables organizations to adopt enterprise class technologies for their environment at an affordable price point.
However, security, availability, compliance, performance, portability and the cloud provider's market longevity can often be of concern.
It's really a case of data classification and risk.
When a company's applications and data are moved from on-premise platforms to a public cloud offering, the organization will essentially be 'renting' services alongside other customers, whilst entirely entrusting the provider and its staff with regards to data security, uptime of services, confidentiality, compliance and transition, all of which can have a catastrophic effect for some businesses if not adhered to or met.
Before considering public cloud offerings, companies will need to thoroughly understand the business impact and revenue loss that could occur from hosting data off-premise in the public cloud.
At present, the above normally dictates that an organization's 'crown jewels', i.e. enterprise, business critical, secure or regulatory data and applications, remain on-premise or within a secure private cloud environment whilst more commodity based or tactical services, such as data archiving, backup, e-mail, collaboration and workspace recovery, are moved to a public cloud.
However, the continued maturation of public cloud service offerings is starting to challenge this principle and more progressive organizations are embracing a 'cloud first' approach to application deployment.
- Del Lunn is a principal consultant at GlassHouse Technologies.
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