| DYNAMIC REQUEST DISPATCHING ALGORITHM FOR WEB SERVER CLUSTER |
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| 作者姓名： | 杨振江 张德运 孙钦东 孙清 |
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| 作者单位： | School of Electronics and Information Engineering, Xi＇an Jiaotong University, Xi＇an 710049, China |
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| 基金项目： | 国家高技术研究发展计划(863计划);国家"火炬计划" |
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| 摘 要： | Distributed architectures support increased load on popular web sites by dispatching client requests transparently among multiple servers in a cluster. Packet Single-Rewriting technology and client address hashing algorithm in ONE-IP technology which can ensure application-session-keep have been analyzed, an improved request dispatching algorithm which is simple, effective and supports dynamic load balance has been proposed. In this algorithm, dispatcher evaluates which server node will process request by applying a hash function to the client IP address and comparing the result with its assigned identifier subset; it adjusts the size of the subset according to the performance and current load of each server, so as to utilize all servers＇ resource effectively. Simulation shows that the improved algorithm has better performance than the original one.
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| 关 键 词： | 分派程序 网络服务器簇 散列法 计算机网络技术 |
| 文章编号： | 1671-8267（2006）02-0106-03 |
DYNAMIC REQUEST DISPATCHING ALGORITHM FOR WEB SERVER CLUSTER |
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| Yang Zhenjiang,Zhang Deyun,Sun Qindong,Sun Qing.DYNAMIC REQUEST DISPATCHING ALGORITHM FOR WEB SERVER CLUSTER[J].Academic Journal of Xi’an Jiaotong University,2006,18(2):106-108. |
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| Authors: | Yang Zhenjiang Zhang Deyun Sun Qindong Sun Qing |
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| Abstract: | Distributed architectures support increased load on popular web sites by dispatching client requests transparently among multiple servers in a cluster. Packet Single-Rewriting technology and client address hashing algorithm in ONE-IP technology which can ensure application-session-keep have been analyzed, an improved request dispatching algorithm which is simple, effective and supports dynamic load balance has been proposed. In this algorithm, dispatcher evaluates which server node will process request by applying a hash function to the client IP address and comparing the result with its assigned identifier subset; it adjusts the size of the subset according to the performance and current load of each server, so as to utilize all servers' resource effectively. Simulation shows that the improved algorithm has better performance than the original one. |
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| Keywords: | dispatcher web server cluster hashing application-session-keep |
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