Un Protocolo de Reemplazo y Coherencia Adaptativo para Sistemas de Manejo de Caches–Proxy en la Web
Jose Aguilar1 y Ernst L. Leiss2
1 CEMISID, Departamento de Computación Facultad de Ingenieria, Universidad de los Andes Mérida, Venezuela 5101 aguilar@ing.ula.ve
2 Department of Computer Science University of Houston Houston, TX 77204–3475, USA coscel@cs.uh.edu
Article received on June 28, 2002 ]]> Accepted on June 30, 2004
Abstract
As World Wide Web usage has grown dramatically in recent years, so has grown the recognition that Web caches (especially proxy caches) will have an important role in reducing server loads, client request latencies, and network traffic. In this paper, we propose an adaptive cache coherence–replacement scheme for web proxy cache systems that is based on several criteria about the system and applications, with the objective of optimizing the distributed cache system performance. Our coherence–replacement scheme assigns a replacement priority value to each cache block according to a set of criteria to decide which block to remove. The goal is to provide an effective utilization of the distributed cache memory and a good application performance.
Keywords: Web Caching, Web caching performance, Replacement techniques, Coherency techniques.
Resumen
Como el uso de Internet se ha desarrollado dramáticamente en los últimos años, se ha reconocido que las caches en la Web (especialmente las Cache–Proxy) tienen un importante rol para reducir las cargas de los servidores, las latencias de los requerimientos de los clientes y el tráfico en la red. En este articulo, nosotros proponemos un esquema de reemplazo y coherencia adaptativo de caches para los Sistemas de Manejo de los Cache–Proxy en la Web que esta basado en varios criterios sobre el sistema y las aplicaciones, con el objetivo de optimizar el rendimiento del Sistema Distribuido de Caches. Nuestro esquema de reemplazo y coherencia asigna un valor de prioridad de reemplazo a cada bloque de cache según un conjunto de criterios para decidir cuales bloques eliminar. El objetivo es proveer una eficiente utilización de la memoria cache distribuida y un buen rendimiento para las aplicaciones.
Palabras Clave: Rendimiento de las Cache en la Web, técnicas de Reemplazo, técnicas de Coherencia.
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Acknowledgement
This work was partially supported by a CONICIT–Venezuela grant (subprograma de pasantías postdoctorales).
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