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        Title           : Caching Mechanisms in Layered DNS Search Services
        Author(s)       : X. Shi, K. LIU
        Filename        : draft-xhshi-dns-search-caching-00.txt
        Pages           : 0
        Date            : 2002-10-24
        
John Klensin proposed a multi-layered search-based access model for the 
DNS to address more human-friendly naming and navigation need of the 
modern Internet [DNSSEARCH]. When deploying the DNS search system in the 
global Internet, stability and scalability are two most important 
factors no matter what protocol we finally use. This draft demonstrates 
that caching is a significant objective for a stable and scalable DNS 
search system. Particularly, this document analyzes statistical 
operational data collected from our Keyword service. The collected data 
clearly demonstrates the potential high impact of caching in the 
resolution process. Based on deployment experience, the document 
describes alternative caching methods. From there, basic caching 
requirements for DNS Search systems are discussed.

The goal of this document is not to propose some standard caching 
mechanisms or methods but to emphasize the necessity of caching for DNS 
Search systems. Furthermore, the authors believe that the proven high 
efficiency of caching should be an important consideration when 
designing the future lookup protocol for such systems.

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