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From "Julien Nioche (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (NUTCH-1297) it is better for fetchItemQueues to select items from greater queues first
Date Wed, 27 Nov 2013 09:01:44 GMT

    [ https://issues.apache.org/jira/browse/NUTCH-1297?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13833588#comment-13833588
] 

Julien Nioche commented on NUTCH-1297:
--------------------------------------

I think it was long as in 'has many URLs in it', not necessarily as in 'takes a lot of time'.
I think the idea is not dissimilar to NUTCH-1630. 

> it is better for fetchItemQueues to select items from greater queues first
> --------------------------------------------------------------------------
>
>                 Key: NUTCH-1297
>                 URL: https://issues.apache.org/jira/browse/NUTCH-1297
>             Project: Nutch
>          Issue Type: Improvement
>          Components: fetcher
>    Affects Versions: 1.4
>            Reporter: behnam nikbakht
>              Labels: fetch_queues
>             Fix For: 1.8
>
>         Attachments: NUTCH-1297.patch
>
>
> there is a situation that if we have multiple hosts in fetch, and size of hosts were
different, large hosts have a long delay until the getFetchItem() in FetchItemQueues class
select a url from them, so we can give them more priority.
> for example if we have 10 url from host1 and 1000 url from host2, and have 5 threads,
if all threads first selected from host1, we had more delay on fetch rather than a situation
that threads first selected from host2, and when host 2 was busy, then selected from host1.



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