Archive for the ‘Virtualization’ Category
In today’s consumer world one of the things we rely on are appliances – you know – white goods (although you can get them in different colours now) – cookers, washing machines and fridges. I always remember a question we were asked in one of my first physics lesson – if you switch the fridge [...]
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Tags: virtualisation, Virtualization, vmware
We have all heard it – virtualisation is fantastic – it saves you lots of money and rewards you with flexibility. There are, of course, downsides … One recoverable downside is security. This is covered admirably in this article. Another, less publicised and equally recoverable downside is that you could be compromising your availability by hosting [...]
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Tags: uptime, uptime assurance, virtualisation, Virtualization
When Not to Virtualise?
Virtualisation technology has morphed from a mere enabler of efficiency into a fast-emerging bottom-line contributor. It is, in most companies, the default deployment option: you have to make a case for why not to virtualise, according to this article. With the bank paying you a measly 3% (if you are lucky) it’s good to know [...]
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Tags: uptime, uptime assurance, virtualisation, Virtualization
Here’s an interesting article from the Aberdeen Group about protecting virtualised environments. Some sound advice here about tiering your applications to understand whether they should be deemed normal, highly available or critical. This is especially true if you are virtualising them – and there is a note to say that over 50% of applications these [...]
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Tags: aberdeen group, Fault tolerant, Fault-Tolerance, virtualisation, Virtualization
Great article here, which heads off down the path of direct attached virtualisation vs. distributed virtualisation. I hadn’t really thought much about it before. Anyway, what has it got to do with availability? Well, firstly, there seems to be a huge difference in the quality of service that can be provided purely from a latency perspective. [...]
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Tags: Availability, Fault-Tolerance, virtualisation, Virtualization
Questions are being asked here as to the real price of all those virtualisation licences. I agree with the “beg to differ” argument that all the app’s can be containerised – apart from anything else, it adds fantastic flexibility. I think that where is goes wrong though, is the implementation of complex HA architectures that require [...]
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Tags: Continuous Availability, HA, virtualisation, Virtualization
So IT complexity is on the rise is it, even with virtualisation? Is it really a surprise? Not when you consider that the majority of systems deployed rely on high availability clustering of some description – these are the systems that deploy failure/restart technology – generally they work but they sure are complex to administer [...]
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Tags: Fault tolerant, Fault-Tolerance, virtualisation, Virtualization
So we are the half-way line are we? Great article here about what has been virtualised to date and the challenges of the remaining stuff – namely caution when it has come to mission critical or tier1 applications. By their very nature, these remaining applications and services need to be available all the time. Somehow [...]
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Tags: uptime assurance, virtualisation, Virtualization
Mission critical virtualisation
An interesting one here that looks at virtualising mission-critical applications. I have a simple message: “Go for it!” It is argued that fault tolerance is baked into the vmware stack – I say it’s too limited for these app’s – running on a single core and the mere ability to host four per physical server [...]
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Tags: Fault-Tolerance, mission critical, uptime assurance, virtualisation, Virtualization
Should every server be virtualised? Asking “should everything be virtualised?” creates some very interesting discussion points, as Rick Vanover reveals in this article in Techrepublic. One negative side of virtualisation, especially in the remote office/branch office environment, is the cost of supplying a high-availability environment. For this you need a couple of servers, some shared [...]
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Tags: Fault-Tolerance, High Availability, ROBO, virtualisation
Who is the Availability Advisor?
Andy Bailey is Availability Architect at Stratus Technologies.
When not blogging about High Availability, Continuous Availability and Fault Tolerance, he enjoys fast cars and relaxing with his Pipe Organ.
Twitter: @AndyStratus
Linkedin: Andy Bailey
Availability Advisor
