Containers: Everything you need to know
Virtualization

Containers: Everything you need to know

Containers have been one of the major themes in the IT industry over the past couple of years, following the rise to prominence of Docker and its namesake platform. Beneath all the names and buzzwords, the technology has found popularity because it meshes well with a need for greater efficiency and agility in development and IT operations.

Like many trends in IT, containers are not actually a new concept and have been around for many years in one form or another. Even within the realm of x86 servers, Virtuozzo (formerly part of Parallels) was offering a container platform 15 years ago targeted at hosting companies and service providers.

But it was Docker that popularised containers by pulling together a platform that provided the tools to develop and operate application code inside containers. The speed with which containers could be provisioned and deployed using Docker meant the platform quickly found favour among developers.

What are containers?

Containers are a form of virtualisation, but take a different approach to virtual machines. Instead of working at the level of the bare metal to carve up a server into multiple server instances, container platforms operate at the level of the operating system to create sandboxed spaces within which different applications can run. A container can thus be thought of as a chunk of memory reserved for a specific application or piece of code, isolated from other containers on the same system.

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Dan Robinson

Dan Robinson has over 20 years of experience as an IT journalist, covering everything from smartphones to IBM mainframes and supercomputers as well as the Windows PC industry. Based in the UK, Dan has a background in electronics and a BSc Hons in Information Technology.

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Adrian Haberberg on July 17 2017

As an IT-aware person who falls short of being a fully-fledged techie, I found this really useful. Pitched at precisely the right level.

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Adrian Haberberg on July 17 2017

As an IT-aware person who falls short of being a fully-fledged techie, I found this really useful. Pitched at precisely the right level.

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