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Primary clustering information


In computer programming, primary clustering is a phenomenon that causes performance degradation in linear-probing hash tables. The phenomenon states that, as elements are added to a linear probing hash table, they have a tendency to cluster together into long runs (i.e., long contiguous regions of the hash table that contain no free slots). If the hash table is at a load factor of for some parameter , then the expected length of the run containing a given element is . This causes insertions and negative queries to take expected time in a linear-probing hash table.

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Primary clustering

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In computer programming, primary clustering is a phenomenon that causes performance degradation in linear-probing hash tables. The phenomenon states that...

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Linear probing

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performance degrades more quickly at high load factors because of primary clustering, a tendency for one collision to cause more nearby collisions. Additionally...

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Computer cluster

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are orchestrated by "clustering middleware", a software layer that sits atop the nodes and allows the users to treat the cluster as by and large one cohesive...

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List of terms relating to algorithms and data structures

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problem circular list circular queue clique clique problem clustering (see hash table) clustering free coalesced hashing coarsening cocktail shaker sort codeword...

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2020 Democratic Party presidential primaries

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Presidential primaries and caucuses were organized by the Democratic Party to select the 3,979 pledged delegates to the 2020 Democratic National Convention...

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Server farm

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A server farm or server cluster is a collection of computer servers, usually maintained by an organization to supply server functionality far beyond the...

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MySQL Cluster

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MySQL Cluster is a technology providing shared-nothing clustering and auto-sharding for the MySQL database management system. It is designed to provide...

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Database index

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and ORDER BY clauses. There can be more than one non-clustered index on a database table. Clustering alters the data block into a certain distinct order...

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Netherlands Cancer Institute

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of the institute are new methods for diagnostics and treatment. The primary clusters of the NKI-AVL are: Research, Surgical Oncological Disciplines, Medical...

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Primary care physician

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to account for clustering of patients and physicians. Studies of the quality of preventive health care find the opposite results: primary care physicians...

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Cluster headache

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unilateral headache syndrome, or "cluster-like" headache. Management for cluster headache is divided into three primary categories: abortive, transitional...

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Pleiades

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and other names by different cultures, is an asterism and an open star cluster containing middle-aged, hot B-type stars in the north-west of the constellation...

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Convention on Cluster Munitions

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John McCain and his primary opponent Hillary Clinton both voted against it. In 2008, the Pentagon pledged not to use any cluster munitions with a failure...

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Tone cluster

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associated with the sound mass aesthetic, containing, "one of the largest clustering of individual pitches that has been written", Krzysztof Penderecki's Threnody...

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Planet Nine

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the planets would be responsible for a clustering of the orbits of several objects, in this case the clustering of aphelion distances of periodic comets...

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Goo Goo Cluster

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The Goo Goo Cluster is an American candy bar created in 1912 by Howell Campbell and the Standard Candy Company in Nashville, Tennessee. The disk-shaped...

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Medoid

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standard k-medoids algorithm Hierarchical Clustering Around Medoids (HACAM), which uses medoids in hierarchical clustering From the definition above, it is clear...

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Time series

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series data may be clustered, however special care has to be taken when considering subsequence clustering. Time series clustering may be split into whole...

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Solaris Cluster

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area network. Clustering software such as Solaris Cluster is a key component in a Business Continuity solution, and the Solaris Cluster Geographic Edition...

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Nanocluster

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ionized cluster of metals. Cluster ion beams are produced by bombarding the surface with high energetic inert gas (krypton and xenon) ions. The cluster production...

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History of computer clusters

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first commercial clustering product was ARCnet, developed by Datapoint in 1977. ARCnet was not a commercial success and clustering per se did not really...

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Personality disorder

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recorded personality disorder in primary care: a retrospective nationwide cohort study using The Health Improvement Network primary care database". BMJ Open....

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Ang Mo Kio

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Primary School Ang Mo Kio Primary School CHIJ St Nicholas Girl's School (Primary) Jing Shan Primary School Mayflower Primary School Teck Ghee Primary...

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2012 Democratic Party presidential primaries

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than the required 2,383 delegates on April 3, 2012, after a series of primary elections and caucuses. He was formally nominated by the 2012 Democratic...

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Globular cluster

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A globular cluster is a spheroidal conglomeration of stars that is bound together by gravity, with a higher concentration of stars towards their centers...

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