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          淺論外文翻譯___基于網絡爬蟲的有效URL緩存

          導讀:外文翻譯---基于網絡爬蟲的有效URL緩存
          described in this paper, we used the Mercator web crawler
          [22, 29]. Mercator uses a set of independent, municating web crawler processes. Each crawler process is responsible for a subset of all web servers; the assignment of URLs to crawler processes is based on a hash of the URL’s host ponent. A crawler that discovers an URL for which it is not responsible sends this URL via TCP to the crawler that is responsible for it, batching URLs together to minimize TCP overhead. We describe Mercator in more detail in Section 4.
          Cho and Garcia-Molina’s crawler [13] is similar to Mercator. The system is posed of multiple independent, municating web crawler processes (called “C-procs”). Cho and Garcia-Molina consider different schemes for partitioning the URL space, including URL-based (assigning an URL to a C-proc based on a hash of the entire URL), site-based (assigning an URL to a C-proc based on a hash of the URL’s host part), and hierarchical (assigning an URL to a C-proc based on some property of the URL, such as its top-level domain).
          The WebFountain crawler [16] is also posed of a set of independent, municating crawling processes (the “ants”). An ant that discovers an URL for which it i
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