Competitive paging algorithms

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WebWe studied a 2-competitive algorithm for ski-rental. We also observed that our greedy algorithm for load balancing is a 2-competitive online algorithm. In this lecture, we will study online algorithms for paging, ﬁnance, and k-server on a line. 20.2 Paging Paging is an important problem in computer systems design. ... WebFor deterministic algorithms, we show that an adaptation of LRU is strongly competitive, while for the randomized case we show that by adapting the classical Mark algorithm we get an algorithm with a competitive ratio larger than the lower bound by a multiplicative factor of approximately 1.7. Keywords. Input Sequence; Competitive Ratio; Online ...

An Associativity Threshold Phenomenon in Set-Associative Caches

Weba online paging/caching algorithm is to evict pages from the cache in a good way that minimizes the number of cache misses. This algorithm is an online algorithm because generally we do not know what the requests will be from the beginning. First we introduce the concepts of Least Recently Used (LRU) and Round. Deﬁnition 2. WebMay 1, 1990 · The 3-Server Problem in the plane (extended abstract) W. Bein, M. Chrobak, L. Larmore. Mathematics, Computer Science. 1999. TLDR. The Work Function Algorithm is 3-competitive for the 3-Server Problem in the Manhattan plane and as a corollary, a 4.243-competitive algorithm for 3 servers in the Euclidean plane is obtained. Highly Influenced. flight time from kansas city to hawaii

20.1 Introduction 20.2 Paging - MIT OpenCourseWare

WebJul 27, 2006 · If the P application processes always make good cache replacement decisions, our online application-controlled caching algorithm attains a competitive ratio of $2H_{P-1}+2 \sim 2 \ln P$. Typically, P is much smaller than k , … WebMar 1, 2000 · Request PDF Competitive analysis of randomized paging algorithms The paging problem is defined as follows: we are given a two-level memory system, in which one level is a fast memory, called ... WebThe paging problem is that of deciding which pages to keep in a memory of k pages in order to minimize the number of page faults. This paper introduces the marking algorithm, a simple randomized on-line algorithm for the paging problem, and gives a chesapeake vision plan

Competitive analysis of randomized paging algorithms

WebApr 10, 2024 · Some of our results generalize to other paging algorithms besides LRU, such as least-frequently used (LFU). ... ·logc)-competitive algorithm for the matroid caching problem, where r and c are the ... WebMay 18, 2002 · This paper introduces the marking algorithm, a simple randomized on-line algorithm for the paging problem, and gives a proof that its performance guarantee … flight time from jfk to paris franceWebSep 28, 2010 · The paging algorithm Least Recently Used Second Last Request (LRU-2) was proposed for use in database disk buffering and shown experimentally to perform better than Least Recently Used (LRU). We compare LRU-2 and LRU theoretically, using both the standard competitive analysis and the newer relative worst order analysis. The … chesapeake volleyball association

"WebCompetitive paging algorithms. Competitive paging algorithms. Amos Fiat. 1991. Continue Reading. Download Free PDF. Download ... " - Competitive paging algorithms

Competitive paging algorithms

Lecture 23: Competitive ratio: rent or buy problems

WebIn the file caching problem, the input is a sequence of requests for files out of a slow memory. A file has two attributes, a positive retrieval cost and an integer size. An algorithm is required to maintain a cache of size k such that the total size of ... WebFiat et al ( at1991competitive) introduced a randomized paging algorithm, RMA (Randomized Marking Algorithm). RMA works as follows: Initially, all pages are …

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WebMar 6, 2000 · Then we provide a new, H k -competitive algorithm for paging. Our algorithm, as well as its analysis, is simpler than the known algorithm by McGeoch and Sleator. Another advantage of our algorithm is that it can be implemented with complexity bounds independent of the number of past requests: O (k 2 log k) memory and O (k 2) … WebMar 3, 2016 · In the unweighted case, where each load costs 1, the LRU algorithm achieves a competitive ratio (CR) of k, which is known to be optimal for deterministic algorithms. Next, consider the weighted case, where each page i has a loading cost of c i, and the goal is to minimize the sum of loading costs. There are known algorithms for …

WebOnline Algorithms (continued) 20.1 Introduction In the previous lecture, we deﬁned the term competitive ratio for deterministic online algorithms. We studied a 2-competitive … WebWhat is the best paging algorithm if one has partial information about the possible sequences of page requests? We give a partial answer to this question by presenting the …

WebJan 8, 2002 · We present a competitive analysis of the LRFU paging algorithm, a hybrid of the LRU (Least Recently Used) and LFU (Least Frequently Used) paging algorithms. WebCOMPETITIVE PAGING ALGORITHMS 689 maintains a set of marked vertices. Initially the marked vertices are exactly those that are covered by servers. After each request, …

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WebThe k -server problem is a problem of theoretical computer science in the category of online algorithms, one of two abstract problems on metric spaces that are central to the theory of competitive analysis (the other being metrical task systems ). In this problem, an online algorithm must control the movement of a set of k servers, represented ... flight time from la to australiaWebDec 1, 1991 · COMPETITIVE PAGING ALGORITHMS 693 Proof. 1 Let A be a randomized on-line algorithm for solving the problem. We use the technique of constructing a … flight time from la to auckland nzWebNov 22, 2005 · Competitive Ratio; Online Algorithm; Competitive Analysis; Request Sequence; Fast Memory; These keywords were added by machine and not by the … chesapeake vision insurance providersWebMar 1, 2000 · In this paper we use competitive analysis to study the performance of randomized on-line paging algorithms. Our goal is to show how the concept of work … chesapeake vision insuranceWebDec 1, 1991 · This paper provides a new, H k -competitive algorithm for paging, which is simpler than the known algorithm by McGeoch and Sleator and can be implemented … chesapeake volleyballWebJan 21, 2009 · We study web caching with request reordering. The goal is to maintain a cache of web documents so that a sequence of requests can be served at low cost. To improve cache hit rates, a limited reordering of requests is allowed. Feder et al. (Proceedings of the 13th ACM–SIAM Symposium on Discrete Algorithms, pp. 104–105, … chesapeake vital recordsWebCompetitive Paging Algorithms. A. Fiat, R. M. Karp, M. Luby, L. A. McGeoch, D. D. Sleator, N. E. Young, Competitive Paging Algorithms, Journal of Algorithms 12, 685 … flight time from la to beijing china