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From "Andrzej Bialecki (JIRA)" <>
Subject [jira] Created: (NUTCH-61) Adaptive re-fetch interval. Detecting umodified content
Date Sun, 05 Jun 2005 20:44:39 GMT
Adaptive re-fetch interval. Detecting umodified content

         Key: NUTCH-61
     Project: Nutch
        Type: New Feature
  Components: fetcher  
    Reporter: Andrzej Bialecki 
 Assigned to: Andrzej Bialecki  

Currently Nutch doesn't adjust automatically its re-fetch period, no matter if individual
pages change seldom or frequently. The goal of these changes is to extend the current codebase
to support various possible adjustments to re-fetch times and intervals, and specifically
a re-fetch schedule which tries to adapt the period between consecutive fetches to the period
of content changes.

Also, these patches implement checking if the content has changed since last fetching; protocol
plugins are also changed to make use of this information, so that if content is unmodified
it doesn't have to be fetched and processed.

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