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Cloud migration alone won't be enough to tackle the climate change crisis.

Nick Westall, CTO of CSI, discusses why being a responsible CTO when it comes to sustainability isnt just about moving to the cloud

IT departments are being asked by their boards to demonstrate improved sustainability. Often, they attribute their move to the cloud as a way of showing commitment to the reduction of their carbon footprint and the green agenda. While its a good example of carbon offset, is it just a way to pass the buck to the cloud provider rather than look in more depth about being a responsible user of IT? How much real consideration goes into calculating and demonstrating responsible computing in business today?

In 2020, the IBM Academy of Technology (AoT) brought together experts in many fields to discuss responsible computing. They analysed the anxieties of over 100 CTOs and looked at all aspects of IT to answer questions such as, Am I doing enough to be sustainable?; Are we being ethical in our use of data?; and Am I doing enough to ensure that the infrastructure we use is minimising its impact on the environment?. As a result, the initiative has created a framework which outlines important considerations of responsible computing.

From the more obvious topics associated with running your computing infrastructure to its wider impacts, the AoT framework summarised that responsible computing comprised of six main domains:

The reasons for needing to be a responsible CTO are just as strong as the need to be a tech-savvy one if a company wants to thrive in a digital economy. There are many facets to being a responsible CTO, such as making sure that code is being written in a diverse way, and that citizen data is being used appropriately.

In a BCS webinar, IBM fellow and vice-president for technology in EMEA, Rashik Parmar, summarised that the three biggest forces driving unprecedented change today included post-pandemic work; digitalisation; and the climate emergency. With many organisations turning to technology to help solve some of the biggest challenges theyre facing today, its clear that there will need to be answers about how this tech-heavy economy will impact the environment. It makes sense that this is often the first place that a CTO will start when deciding how to drive a more responsible future.

When you consider that each of the six domains above will make a huge difference to how responsible an organisation is deemed, its easy to see why its about much more than a move to the cloud.

If we focus on the environmental considerations, its becoming more commonly known that whilst a move to the cloud may be better for reducing an organisations carbon emissions than running multiple on-premises systems, the initiative alone isnt going to spell good news for climate change. In fact, if everyone were to move to the cloud in droves, the internet would need to quickly find a way of being more sustainable.

A large part of this is the requirement for major cloud providers to switch most of their data centres to more renewable energy sources. This is an area that falls outside of a customers control. But in fact, the issue of reducing emissions can be influenced far more greatly by the activities undertaken by the organisations themselves. It can all come down to understanding how their workloads are running and whether it is driving high levels of utilisation.

When it comes to running at high levels of utilisation, the answer isnt necessarily all cloud driven. For example, the performance and scale of the new IBM Power server, the E1080, delivers the benefits of consolidation at levels far higher than is possible with x86-based alternatives.

When compared with the cloud hyperscalers, such as Azure and AWS, it offers a greater ability to scale. In a recent webinar, David Spurway, IBM systems technology architect, modelled IBMs Power10 against Azure and AWS, looking at the largest of their offerings which could then be filled up with workloads such as multiple containers*.

*In the model, David used the conservative performance metric of the IDC QPI, which gives relative performance across architectures but does not consider advantages for specific workloads. For example, the new Power10 cores can hold over four times more containers per core than x86, so the real values may be even higher.

This is how the performance of the virtual servers, bare metal server, and physical IBM Power servers look when considering their maximum capacity:

When dividing the server performance rating by the number of cores, David then demonstrates a rough estimate of performance per core. This demonstrates that by doing much more per core, fewer cores are needed, which leads to less energy needed.

Whilst virtual servers in the cloud can run at high levels of utilisation near the 90% mark the average utilisation is much lower. This is because the number of workloads that smaller servers can hold is lower, and that means more servers are needed. With IBMs large E1080 server, average and peak utilisations demonstrate a more efficient use of the computational resources available. When utilisation is combined with scale and performance it provides a very powerful and efficient option.

If an organisation is on a software licencing model that adjusts depending on the level of utilisation and usage, it is also possible to achieve significant cost savings. The ability to turn applications on and off when not in use will reduce the number of processors needed. If the organisation is charged by the processor core, this could be as much as five times less expensive because of the software savings when running fewer cores.

There are detailed methodologies available that help organisations establish where they are today in terms of responsible computing. As sustainability is such a relatively new factor, its important for an organisation to understand where it is so that it can measure what improvements are being made in the form of Key Performance Indicators.

The three main considerations can be summarised as:

The responsible computing deliverables include methodologies for all six domains to help companies understand where they are today and demonstrate how they are improving and delivering against their KPIs. While its true that cloud infrastructure does deliver carbon savings, organisations should also think about the environmental and cost saving benefits in other on-premises measures.

Related:

A guide to responsible technology practices Taking a look at four areas of tech that look to create a more positively impactful future.

Everyone likes to talk sustainability, but who takes responsibility? Michiel Verhoeven, managing director at SAP UKI, explores who needs to take responsibility for sustainability initiatives in the organisation.

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Being a responsible CTO isn't just about moving to the cloud - Information Age