Host database to keep track of host-level information
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Key: NUTCH-628
URL: https://issues.apache.org/jira/browse/NUTCH-628
Project: Nutch
Issue Type: New Feature
Components: fetcher, generator
Reporter: Otis Gospodnetic
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 [EMAIL PROTECTED]:
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.
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