The industry is teeming with infrastructure as a service (IaaS) providers, each marketing the unique capabilities and benefits of their services. It would be great if service providers also highlighted their solutions’ shortcomings. But this is rarely the case, especially when competing solutions share the same feature gaps.
When evaluating and purchasing IaaS services, you must be aware of the things cloud service providers don’t advertise, and may not want you to know. To help you avoid surprises and setbacks, we’ve constructed a list of 12 considerations.
1. Many IaaS providers oversubscribe their instances
When service providers host multiple tenants on shared hardware, the combination of virtual resources they’ve allocated to each tenant is usually more than the total hardware capacity. This can result in poor performance – and inconsistent performance – when competing instances get used heavily. Some providers avoid this practice, or offer dedicated instances, but charge a premium price. For some applications, the premium is worth it.