behnam nikbakht created NUTCH-1347:
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Summary: fetcher politeness related to map-reduce
Key: NUTCH-1347
URL: https://issues.apache.org/jira/browse/NUTCH-1347
Project: Nutch
Issue Type: Improvement
Components: fetcher
Affects Versions: 1.4
Reporter: behnam nikbakht
when Nutch is running on Hadoop , based on map-reduce concept, each map task do
some thing on it's owned data, so, each fetcher map-task work with it's Queues
and do not know any thing about other Queus. so, enforce delay between
successive requests and maximum concurrent requests policies on it's Queues.
but with a simple test we found that it's not good piliteness mechanism when we
have multiple map tasks.
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