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46 Containers For Dummies, HPE and Docker Special Edition These materials are © 2017 John Wiley & Sons, Inc. Any dissemination, distribution, or unauthorized use is strictly prohibited. At the same time, companies are working hard to transform monolithic applications to microservices-oriented architecture. Why? When you think about something large and static, there is also a feeling of lack of inertia. That is, getting that thing under- way is going to take a ton of effort. If you could just break it up into smaller, nimbler components, getting those parts underway individually would be much easier. This is what's happening today. Large applications are diffi- cult to support and update and are being broken apart. Whereas these monolithic applications required large virtual machines or containers to operate, their new microservices-based versions are spread across many smaller containers. This makes the applica- tion far easier to maintain because there isn't a single massive construct to work with anymore and it makes the individual com- ponents far easier to scale as workload demands increase. These are just some of the reasons that companies are working hard to modernize what they have and migrate their business- critical applications to Docker.