The Truth About Tiered Storage

Network World reports that although it’s the answer to today’s heavy reliance on data storage, the tiered system takes its toll on performance. Tiered storage can increase latency, which can eat at performance faster and frustrate users. The issue isn't with the different media in a tiered storage device, but with the underlying architecture.

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"Tiered storage architectures often execute clustered file systems, joining N number of nodes, load balancing across nodes, moving data to and from NVRAM to disks, hosting RAID controllers, performing housekeeping of file-system metadata, and executing data protection applications. The point is that NAS controllers perform many tasks that consume system bandwidth. The most sacred function is the orderly storage, retrieval and protection of user data, and not performance.”

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