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Data management has become a more challenging and significant part of development of high-end applications. There are a number of reasons for this. Over recent years the rate of improvement in CPU performance has increased rapidly. Data transfer rates have increased too, but not as rapidly. These results in an increasing portion of time in an application required for moving data in and out. As data needs expand the physical storage location is likely to be farther away (i.e., slower to access). Data may be in a mass storage system, not necessarily in close geographic proximity to the compute nodes. They may be in a file system with a relatively slow path to the compute nodes.
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