VirtualisationCategory

Many organisations will have had on-premises datacentres or computer rooms, or have had their own servers and infrastructure in co-lo or hosted datacentres. Whilst these systems may have served a company’s needs in the past, it is often more complex and unknown systems that are the last to be evolved… Continue Reading Replacing old Infrastructure – a step by step guide

I started my career on Exchange 5.0 in late 1997, and the product became my main skill area for nearly 22 years. In that time, I experienced hacking attacks and website defacement of OWA, stability battles and architecture changes when Microsoft evolved the system towards cloud capability. When my career… Continue Reading Exchange on-premises hack: who still has servers?

Through my study of AWS and Azure, I have found that one challenge is in understanding the terminology difference, particularly as my own background is in VMware technologies. So, I have created this little chart that compares the three.Obviously, there is no direct one-to-one mapping of the product offerings, but… Continue Reading Azure Vs. AWS terminology

It has finally happened – many years ago, when I worked at VMware, there were internal rumors of a rebootless upgrade being worked on since vSphere 5.0. And now, with the release of vSphere 6.7, you can upgrade the hypervisor without rebooting. What happens is the hypervisor will re-load, without… Continue Reading VMware rebootless upgrades are here!

The concept of “Design for Failure” is often used to describe the approach that assumes that there will be a hardware or system failure somewhere, sometime – and instead of architecting for hardware and server clustering and availability, to design applications so that recovery can be performed quickly. Where the… Continue Reading Design for Failure

VMware are often focussing on the latest and greatest features and capabilities offered by their newest software. Of course, they are always driving forward and the next version’s enhancements and benefits are forefront of their minds – but there are still some people out there who are just starting on… Continue Reading Benefits of VMware – the uneven cluster

In my recent AWS Certified Solutions Architect exam, one of the key learning areas that I needed to master, was the change in terminology to transfer my knowledge from VMware vs. AWS. Obviously, there is no direct one-to-one mapping of the product offerings, but there are some common areas, at… Continue Reading VMware vs. AWS

On Friday 7th October, I sat and passed the Amazon Web Services (AWS) Certified Solution Architect exam. I passed the exam, but I probably would have achieved a higher score if I had actually used AWS before. I started studying for the exam without any prior exposure to the technology,… Continue Reading Amazon Certified Solution Architect

I always recommend to create a dedicated management cluster for your vSphere virtual environment, but what is a dedicated management cluster, and why is it so important to have one? Not only is it best practice, there are real reasons why you should choose to do this. What is a… Continue Reading Dedicated Management Cluster

DIY is dead. The time when you could “do it yourself” is no longer relevant for IT Infrastructure. It may take a while for it to happen, but it has happened before – to desktop PCs. Approximately 20 years ago, it was both cheaper and easier (if you knew how) to… Continue Reading The era of infrastructure DIY is dead

You may know about ToR, top-of-rack (for) switches. It’s the practice of placing a physical switch within each rack, so that the network switching for the rack is close to the servers or devices that need to connect to it. The ToR switches will allow servers to communicate with each… Continue Reading ToR switch placement – not at the top!

I recently read an article (published August 2013), listing all the reasons not to virtualise certain systems. It got me thinking about some of those people who still think that virtualization is new, not stable and more complicated. Why Virtualize? There are hundreds of articles about why virtualisation is good… Continue Reading Why bother to virtualize?

As you read this, there are no more VCP 4 certified people. VMware have introduced a controversial new policy to make VCP certifications expire after 2 years, and March 10th marks the date that the VCP Expiry takes place. VCP Expiry The qualification of VCP was in three stages –… Continue Reading There are no more VCP4s in the world

In a recent discussion about network security, I had a [relatively inexperienced] network administrator make a comment that security between networks can be achieved with VLANs. As most of us know, VLANs do not equal network security – but it made me wonder why she came to that conclusion, after… Continue Reading VLANs do not equal network security

I often use the concept of RADIO (Redundant Array of Distributed Independent Objects) in my description of VSAN, as people need extra help in understanding why you don’t need RAID in a VMware Virtual SAN. It’s particularly applicable to storage, but the concept also applies to compute (CPU and RAM),… Continue Reading What is RADIO?

The definition of Converged Infrastructure (CI) can be categorised into different ‘flavours’. In summary, the term defines an approach where storage and compute are tightly coupled, and managed within a software-defined paradigm that offers policy driven provision of resources. Different vendors provide their own ‘flavour’ of CI, ranging from an… Continue Reading What is Converged Infrastructure?

Today I attended a Microsoft StorSimple 8000 series presentation at Microsoft’s offices here in Adelaide, South Australia. It’s a 2RU / 4RU device that provides primary storage through iSCSI, with inline block level automatic tiering, de-duplication and compression, where the final tier is Azure cloud storage. It incorporates volume-level snapshots “for… Continue Reading Microsoft StorSimple 8000 series review

I had a question from a company that had lots of small regional sites, asking “Is a single VM on a single host viable?”, in response to my query about why they were buying one or two servers for these sites. There was an assumption that it was only worthwhile… Continue Reading Is a Single VM on a Single Host viable?

How many times have you encountered a “block” of a suggestion for improvement with a response of “That is what we have always done”? People are resistant to change, even in an innovative organisation dealing with the latest technologies. The reality is that the opportunities provided by technology and new tools are… Continue Reading That is what we have always done

You may not know that VMware provides some online courses for free. All you need to do is register for a myLearn account and then you can register for – and complete – various foundation courses. Go to http://mylearn.vmware.com/portals/www/mL.cfm?menu=topfreecourses and you will see an up to date list of the available… Continue Reading Free training courses from VMware!