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Coordinated Sampling: An Efficient, Network-Wide Approach for Flow Monitoring

机译：协调采样：一种有效的，网络范围的流量监测方法

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We present Coordinated Sampling, a new technique for improved flow- level monitoring. Our approach derives from three key design decisions: flow sampling instead of uniform packet sampling; hash-based flow selection to achieve coordination between routers without needing explicit communication channels; and an approach for distributing responsibilities across routers to achieve network-wide monitoring objectives while taking into account resource constraints on each router. We demonstrate that Coordinated Sampling presents an attractive solution for ISPs. First, it more than doubles flow coverage to support security applications and does so without compromising the accuracy of traditional traffic engineering applications. Second, it enables network operators to directly specify and achieve fine-grained network-wide monitoring objectives. Third, it naturally load balances monitoring responsibilities across routers and at the same time efficiently leverages the available capacity on each router.

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