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This article:

Single point failures
From: David Lacey’s IT Security Blog | September 02, 2009

 Indicates that the author believes that the use of Cloud Computing style technologies is introducing significant single points of failure. His evidence for this a failure in Google’s gmail. Surely such failures are not inevitable, as this technology is design to reduce such failures through multiple redundancy. The failures do happen, but I would propose they are not inevitable. They are more a symptom of pressures to circumvent due development process, thus reducing cost and time to market.

In my mind, the question really is whether Google accepted that there was a significant risk of system outage in order maintain reduced cost for Gmail delivery? If so, was this an appropriate choice for the market?

I have been aware for a while that the IT infrastructure library (ITIL) contains a section on Capacity Management. There is, however, relatively little information that is publicly available about ITIL and the way that it is fitted together. (A summary of ITIL is available here.) As a member of the BCS I found a summary of the foundations of ITIL on the 24×7 books site that membership provides access to. Possibly more interesting, however, is the following article that provides some description of the ITIL Capacity Management, along with a simple example of an ITIL Capacity Plan: ITIL Capacity Management Deep Dive Continue reading ‘ITIL and Capacity Management’ »