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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

    • Type: Improvement
    • Status: Open
    • Priority: Major
    • Resolution: Unresolved
    • Affects Version/s: 1.13
    • Fix Version/s: 1.19
    • Component/s: generator
    • Labels:
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      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

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              • Assignee:
                Unassigned
                Reporter:
                markus17 Markus Jelsma
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                • Created:
                  Updated: