Post by George Crump (thank you)
Silos of storage within the storage environment are increasing at an alarming rate with each being dedicated to a specific task or workload. Why? The answer is simple: risk mitigation. The data center can’t afford to have applications experience unpredicted drops in and inconsistent performance. The simplest way to assure this predictability is to dedicate a storage system to each type of workload. The problem with this, of course, is that dedicating storage systems to workloads is expensive, both in financial and human resources.
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Storage CH Blog 