Storage Considerations in Data Center Design （存储数据中心设计中考虑）.pdf

Storage Considerations in Data Center Design Storage Considerations in Data Center Design November 2011 1 of 27 2011 STORAGE NETWORKING INDUSTRY ASSOCIATION Storage Considerations in Data Center Design Introduction Storage is an increasingly important and complex component in modern data centers. Requirements for fast data access combine with other often conflicting requirements for retention, legal discovery, longevity, integrity, accessibility, security, disaster recovery and so on. All these requirements must be carefully balanced. The recent move toward cloud infrastructures signals an additional requirement--to convert traditional capital expenses (CAPEX) into operational expenses (OPEX). This has the effect of shining a spotlight on the existing operational costs of storage, which brings the power usage of the equipment into much sharper focus than has been traditionally seen. Increasing power and rack densities in modern gear have accentuated this trend. But the single most important consideration related to storage when planning a data center is the intended use of the data center. Large monolithic data centers being built by giant internet companies such as Microsoft and Google are fundamentally different in model and operation from data centers designed to support existing systems of record, i.e. database-driven business applications. These in turn tend to be different from data centers intended to support engineering operations. Data centers intended to support cloud-oriented operations tend toward the monolithic model, but have added requirements for switching and virtual storage infrastruct