Christian Wickham

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Christian Wickham 's Posts

Ring, ring. “Hello, is that the IT Manager? Can I ask you a few questions for a survey? <preamble here to build a relationship and feeling of trust, like complimenting the company or asking what the company does, saying that it’s impressive or hard work>. Can you tell me what… Continue Reading Information disclosure as a security risk

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

Are you new to computers, or do you always have strange little problems with your computer? Are you scared of using your computer / tablet / device because things seem to go wrong – you press the “wrong” button? Do you want to fix your computer problems yourself? As a bit… Continue Reading The 6 Rs to fix computer problems yourself

Assumptions are often made that if you have storage, you need to use RAID. If you have moving parts like fans, the assumption is that you need a hot spare (or at least the ability to hot replace the part), and then it goes on to redundant network connections, warm… Continue Reading The concept of redundancy – is it redundant?

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?

You may think it is bold of me to forecast the impending decline of Infrastructure As A Service (IaaS) before it is even mainstream, but I expect that the takeup and consumption of IaaS offerings will decrease gradually from 2025, down to almost nothing in 2030. So, IaaS is dead.… Continue Reading Forecasting the demise of IaaS

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

For years we have been hearing that tablet sales are outstripping PC sales, and projections that the PC platform will die, leaving all of us using tablets for all our computing needs. There has been a rush by organisations to equip staff with mobile devices (or let them bring their… Continue Reading Why a virtual desktop is the solution to workforce mobility

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?

Activity Based Working (ABW) is the term used for a change in work practices that focusses on creating collaboration based workspaces, instead of personally assigned desks or cubicles. To enable ABW, there needs to be a shift in tools used by staff, so that they are accessible from mobile devices.… Continue Reading Activity Based Working is not provided by IT

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

How many passwords do you have? Do you remember them all? Do you use a password manager tool? Are your passwords complex and secure, or easy to guess dictionary words? What is your weakest point? I bet that last question threw you a bit. Your entire security and identity could… Continue Reading Password security in the age of Cloud

In today’s modern world, the task of threat and risk assessment is based on prior experience and history. It is human nature to be limited in our imagination by prior experience. When identifying the threats to your business and systems, you need to have an imagination on the possibilities that… Continue Reading Threat and risk assessment