A common question we get with these projects is why we’re building them privately.

There are a few different ways to go about building a subsea cable. The first is to simply purchase capacity from an existing cable, or one being built by someone else. The second is to create a consortium of partners with similar needs and build a cable together. The third is to build it yourself.

All of these options come with different pros and cons, and we use a combination of all three methods to best serve our customers. When approaching a new cable project, and deciding on which of the three methods to use, we consider our needs, and the needs of our customers, in a few areas:

Performance and latency: Cables are often built to serve a very specific route. When we build privately, we can choose this route based on what will provide the lowest latency for the largest segment of customers. In this case, we wanted connectivity across the Atlantic that was close to certain data centers, but the reasons could also include the ability to land in certain countries, or to connect two places that were previously underserved, such as was the case with Curie.

Capacity: The bandwidth that we want to deliver can vary widely, depending on what already exists and where our customers need more, now and in the future. Our capacity planning includes estimates of Google’s and our customers’ needs for years to come.

Guaranteed bandwidth for the lifetime of the cable: The life of a cable can vary from 15 to 25 years, but as with many infrastructure projects, they sometimes continue to serve the route beyond their initial projected lifespan. Our ability to guarantee our customers a certain level of connectivity helps them confidently plan for their businesses going forward.

We started off with two private cable projects that run over relatively short distances. These were our Alpha and Beta cables (a nod to how we name software releases), and their success led us to build both Curie and Dunant privately. We’ve worked with consortia on other new cables—including Havfrue, HK-G and JGA-S--and will continue to invest in consortium cables in the future.

Our investments in both private and consortium cables meet the same objectives: helping people and businesses can take advantage of all the cloud has to offer. We’ll continue to look for more ways to improve and expand our network, and will share more on this work in the coming months. In the meantime, you can learn more about our network on our website, or try our demo to see how our infrastructure looks today.