WIKIPEDIA: Internet-based computing, whereby shared resources, software, and information are provided to computers and other devices on demand, like the electricity grid.
GARTNER: A style of computing in which massively scalable IT-related capabilities are provided 'as a service' using Internet technologies to multiple external customers.
What is the difference between a private and public cloud?
A public cloud is a shared infrastructure, where anyone is able to tap into the resources.
A private cloud delivers resources behind a firewall to only one customer, usually on-premise.
It has been said that the term ‘private cloud’ is an oxymoron. Given the two definitions listed above, this may be the case. ‘Shared resources’ and ‘multiple external customers’ are definitely not offered within a private cloud. Private clouds lose so many of the benefits of cloud computing, such as scalability and flexibility.
There are concerns over security within a public cloud – how is my data going to be separated and secure from everyone elses on the same cloud? The term ‘public’ is fairly misleading… yes, you’re sharing a cloud, but no, there’s no ‘public access’.
Harbour IT’s cloud offering can be described as a Hybrid Cloud. While there are multiple customers on our cloud, each is stringently segregated into their own VRF (Virtual Routing & Forwarding). We use VMware’s vSphere technology – the best in the business.
Unlike many providers, Harbour IT’s data centre is located in Sydney, with a DR site in Melbourne. Both sites boast state-of-the-art security, including biometric hand geometry readers and CCTV and detailed surveillance logs.
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FURTHER READING:
Online debate: public vs. private clouds: http://www.networkworld.com/community/tech-debate-private-public-cloud
VMware’s vSphere: http://www.vmware.com/products/vsphere/
Stats and report on cloud computing from IDC (earlier this year): http://www.arnnet.com.au/article/341263/cloud_computing_cloud_facts_figures/
