Open source seeded the cloud, 451 Research found five years ago — and those seeds have grown. Open source now plays an even more prevalant and important role — not only in cloud computing, but also in other, related areas, such as big data, DevOps and application containers.
One can consider any layer of cloud computing and see the impact. Infrastructure as a Service, for example, no doubt has experienced an impact from open source software such as Eucalyptus (which was acquired by HP), CloudStack and OpenStack.