Optimizing Cloud Migration: Performance Lessons for the Enterprise

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Page 12 of 35

ing the appropriate cloud provider). A good starting point for this is to look at the region that is geographically nearest; however, that region may not actually be the best option. It is essential that you also consider the peering arrangements that the cloud provider has in place, and therefore the routing that will actually occur between your users and the cloud location. Cloud providers often don't have the most optimized routing between end users and their systems, so it is crucial to test this as much as possible up front to select the best locations. It's even more important to continue monitoring this after the systems are in use by the public. IPM tools are core to your ability to understand the impact of cloud geography and topology on your users. Before starting your journey to the cloud, it's important to under‐ stand what the exact nature of the cloud is. Flawed Thinking: The Cloud Is Just Another Data Center It is easy to think of the cloud as simply a replacement data center with on-demand virtual machines. For many people, the first instinct is to just "lift and shift" their existing infrastructure to a cloud provider. This approach often results in disillusionment with the cloud, as it results in emphasis of the negative without taking advantage of the positives that the cloud has to offer. The real benefits of the cloud are in its dynamic nature, the ability to create and destroy infrastructure on demand, the ability to use the scalable services, the ability to create geographically distributed sys‐ tems, etc. If you are just creating a fixed number of servers with installed software, then you are likely building a system that is less reliable and possibly more expensive than that provided by a tradi‐ tional data center. It is often said that servers within data centers are like pets, whereas within the cloud (or other virtualized platforms) they are like cattle (a phrase that's widely used but I think was originally coined by Randy Bias). That is, when creating a system in a data center, you can: • Carefully craft a system to meet your exact requirements Flawed Thinking: The Cloud Is Just Another Data Center | 7

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