In this thesis we propose a Content-Based Differentiated Resource Management Mechanism for web cluster. The major difference of our system from other researches is that we used the URL string of content for request routing and admission control.
In the system we implemented two important mechanisms for resource management. The Content-Based Load Balancing is used to share the service requests of each server node and the admission control avoids overload and provides differentiated web service for high priority content. We separate the content into Static Content and Dynamic Content. For Static content, we consider the influence of I/O resource and for dynamic content we consider the influence of CPU resource. When system running server nodes send their load information to distributor periodically, and distributor sorts these server nodes according their load. The I/O load of server is its network bandwidth usage and CPU load information is its CPU Utilization. In the period that the system updates the load information, requests are be forwarded to Light Load Set. CPU light load set are the servers, which have lower CPU Utilization, and I/O light load set are servers having lower network bandwidth usage. And we use load index of each request recorded in URL table and bucket of each node to distribute the traffic evenly. When overload, admission control drops the lower priority request to protect the high priority requests. With priority and differentiated service, our system can provide more resource to important content.
Experiment results show that the proposed system has better performance than Linux Virtual Server(LVS) with Laver4 routing mechanism including RR(Round Robin) and WLC(Weight Least Connection).
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0829101-155449 |
| Date | 29 August 2001 |
| Creators | Yuang, Chia-Sun |
| Contributors | Shyan-Ming Yuan, Chiu-Sing Yang, Sy-Yen Kuo |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0829101-155449 |
| Rights | unrestricted, Copyright information available at source archive |
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