Dynamic load balancing in geographically distributed heterogeneous Web servers

被引：52

作者：

Colajanni, M ^{[1
]}

Yu, PS ^{[1
]}

Cardellini, V ^{[1
]}

机构：

[1] Univ Roma Tor Vergata, Dipartimento Informat, Dip Informat Sistemi & Produz, I-00133 Rome, Italy

来源：

18TH INTERNATIONAL CONFERENCE ON DISTRIBUTED COMPUTING SYSTEMS, PROCEEDINGS | 1998年

关键词：

D O I：

10.1109/ICDCS.1998.679729

中图分类号：

TP301 [理论、方法];

学科分类号：

081202 ;

摘要：

With ever increasing Web traffic, a distributed multi-server Web site can provide scalability and flexibility to cope with growing client demands. Load balancing algorithms to spread the requests across multiple Web servers are crucial to achieve the scalability. Various domain name server (DNS) based schedulers have been proposed in the literature, mainly for multiple homogeneous servers. The presence of heterogeneous Web servers not only increases the complexity of the DA'S scheduling problem, but also makes previously proposed algorithms for homogeneous distributed systems not directly applicable. This leads us to propose new policies, called adaptive TTL algorithms, that take into account of both the uneven distribution of client request rates and heterogeneity of Web servers to adaptively set the time-to-live (TTL) value for each address mapping request. Extensive simulation results show that these strategies are robust and effective in balancing load among geographically distributed heterogeneous Web servers.

引用

页码：295 / 302

页数：8