Uploaded image for project: 'Nutch'
  1. Nutch
  2. NUTCH-628

Host database to keep track of host-level information

    Details

    • Type: New Feature
    • Status: Closed
    • Priority: Major
    • Resolution: Duplicate
    • Affects Version/s: None
    • Fix Version/s: None
    • Component/s: fetcher, generator
    • Labels:
      None
    • Patch Info:
      Patch Available

      Description

      Nutch would benefit from having a DB with per-host/domain/TLD information. For instance, Nutch could detect hosts that are timing out, store information about that in this DB. Segment/fetchlist Generator could then skip such hosts, so they don't slow down the fetch job. Another good use for such a DB is keeping track of various host scores, e.g. spam score.

      From the recent thread on nutch-user@lucene:

      Otis asked:
      > While we are at it, how would one go about implementing this DB, as far as its structures go?

      Andrzej said:
      The easiest I can imagine is to use something like <Text, MapWritable>.
      This way you could store arbitrary information under arbitrary keys.
      I.e. a single database then could keep track of aggregate statistics at
      different levels, e.g. TLD, domain, host, ip range, etc. The basic set
      of statistics could consist of a few predefined gauges, totals and averages.

        Attachments

        1. NUTCH-628-DomainStatistics.patch
          7 kB
          Otis Gospodnetic
        2. NUTCH-628-HostDb.patch
          17 kB
          Otis Gospodnetic
        3. domain_statistics_v2.patch
          7 kB
          Doğacan Güney

          Issue Links

            Activity

              People

              • Assignee:
                Unassigned
                Reporter:
                otis Otis Gospodnetic
              • Votes:
                2 Vote for this issue
                Watchers:
                6 Start watching this issue

                Dates

                • Created:
                  Updated:
                  Resolved: