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Posted to dev@nutch.apache.org by "Lewis John McGibbney (JIRA)" <ji...@apache.org> on 2013/01/12 19:56:13 UTC

[jira] [Updated] (NUTCH-1297) it is better for fetchItemQueues to select items from greater queues first

     [ https://issues.apache.org/jira/browse/NUTCH-1297?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Lewis John McGibbney updated NUTCH-1297:
----------------------------------------

    Fix Version/s: 1.7
    
> 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
>             Fix For: 1.7
>
>         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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