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The shared multi-tenant nature of the cloud has raised serious concerns about its security and performance for high valued services. Of many shared resources like CPU, memory, etc., the network is pivotal for distributed applications. Benign, or perhaps malicious traffic interference between tenants can cause significant performance degradation that hurts performance of applications, and hence, impacts their revenue. Network performance isolation is particularly hard because of the distributed nature of the problem, and the short (few RTT) timescales at which they manifest themselves. This problem is further exacerbated by the large number of competing entities in the cloud, and their volatile traffic patterns.
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