We present Prequal (Probing to Reduce Queuing and Latency), a load balancer for distributed multi-tenant systems. Prequal aims to minimize real-time request latency in the presence of heterogeneous server capacities and non-uniform, time-varying antagonist load. It actively probes server load to leverage the power-of-d-choices paradigm, extending it with asynchronous and reusable probes. Cutting a
Names are crucial for organizing and understanding programs. Yet names and name binding get a second class treatment in programming language definition. We have a fairly standardized approach based on context-free grammars to provide tool independent descriptions of the syntax of programming languages. There is no analog for describing the name binding rules of programming languages. It is hard to
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Keyword extraction has received an increasing attention as an important research topic which can lead to have advancements in diverse applications such as document context categorization, text indexing and document classification. In this paper we propose STF-IDF, a novel semantic method based on TF-IDF, for scoring word importance of informal documents in a corpus. A set of nearly four million do
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