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  1. Nutch
  2. NUTCH-2455

Speed up the merging of HostDb entries for variable fetch delay

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Details

    • Improvement
    • Status: Open
    • Major
    • Resolution: Unresolved
    • 1.13
    • 1.21
    • generator
    • None

    Description

      Citing Sebastian at NUTCH-2420:

      The correct solution would be to use <host,score> pairs as keys in the Selector job, with a partitioner and secondary sorting so that all keys with same host end up in the same call of the reducer. If values can also hold a HostDb entry and the sort comparator guarantees that the HostDb entry (entries if partitioned by domain or IP) comes in front of all CrawlDb entries. But that would be a substantial improvement...

      Attachments

        1. NUTCH-2455.patch
          2 kB
          Semyon Semyonov

        Issue Links

          is related to

          Bug - A problem which impairs or prevents the functions of the product. NUTCH-2924 Generate maxCount expr evaluated only once

          • Major - Major loss of function.
          • Closed
          is required by

          Improvement - An improvement or enhancement to an existing feature or task. NUTCH-2368 Variable generate.max.count and fetcher.server.delay

          • Major - Major loss of function.
          • Closed
          links to

          Web Link GitHub Pull Request #254

          Activity

            People

              Unassigned Unassigned
              markus17 Markus Jelsma
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              Dates

                Created:
                Updated: