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From "Markus Jelsma (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (NUTCH-2286) CrawlDbReader -stats to show fetch time and interval
Date Thu, 23 Jun 2016 15:26:16 GMT

    [ https://issues.apache.org/jira/browse/NUTCH-2286?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15346604#comment-15346604
] 

Markus Jelsma commented on NUTCH-2286:
--------------------------------------

This is a very useful feature indeed! Great work!

> CrawlDbReader -stats to show fetch time and interval
> ----------------------------------------------------
>
>                 Key: NUTCH-2286
>                 URL: https://issues.apache.org/jira/browse/NUTCH-2286
>             Project: Nutch
>          Issue Type: Improvement
>          Components: crawldb
>    Affects Versions: 1.12
>            Reporter: Sebastian Nagel
>            Priority: Minor
>             Fix For: 1.13
>
>
> An overview about fetch times and fetch intervals could be useful to configure a crawl.
 CrawlDbReader could easily calculate min, max and average and show it as part of the statistics
job (command-line option {{-stats}}):
> {noformat}
> % bin/nutch readdb .../crawldb/ -stats
> ...
> TOTAL urls:     544910
> shortest fetch interval:       7 days, 00:00:00
> avg fetch interval:            7 days, 17:43:58
> longest fetch interval:       10 days, 12:00:00
> earliest fetch time:   Wed May 25 11:42:00 CEST 2016
> avg of fetch times:    Sun Jun 05 18:11:00 CEST 2016
> latest fetch time:     Wed Jun 22 10:25:00 CEST 2016
> ...
> {noformat}



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