[jira] [Resolved] (SOLR-9668) Support cursor paging in SolrEntityProcessor

["Mikhail Khludnev (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SOLR-9668?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mikhail Khludnev resolved SOLR-9668.
------------------------------------
       Resolution: Fixed
    Fix Version/s: 6.4

> Support cursor paging in SolrEntityProcessor
> --------------------------------------------
>
>                 Key: SOLR-9668
>                 URL: https://issues.apache.org/jira/browse/SOLR-9668
>             Project: Solr
>          Issue Type: Improvement
>      Security Level: Public(Default Security Level. Issues are Public) 
>          Components: contrib - DataImportHandler
>            Reporter: Yegor Kozlov
>            Assignee: Mikhail Khludnev
>            Priority: Minor
>              Labels: dataimportHandler
>             Fix For: master (7.0), 6.4
>
>         Attachments: SOLR-9668.patch, SOLR-9668.patch
>
>
> SolrEntityProcessor paginates using the start and rows parameters which can be very inefficient at large offsets. In fact, the current implementation  is impracticable to import large amounts of data (10M+ documents) because the data import rate degrades from 1000docs/second to 10docs/second and the import gets stuck.
> This patch introduces support for cursor paging which offers more or less predictable performance. In my tests the time to fetch the 1st and 1000th pages was about the same and the data import rate was stable throughout the entire import. 
> To enable cursor paging a user needs to:
>  * add {{cursorMark='true'}} (!) attribute in the entity configuration;
>  * "sort" attribute in the entity configuration see note about sort at https://cwiki.apache.org/confluence/display/solr/Pagination+of+Results ;
>  * remove {{timeout}} attribute.
> {code}
> <?xml version="1.0" encoding="UTF-8" ?>
> <dataConfig>
>   <document>
>     <entity name="se" processor="SolrEntityProcessor" 
>     query="*:*"
>     rows="1000"
>     cursorMark='true'
>     sort="id asc"  
>     url="http://localhost:8983/solr/collection1">
>     </entity>
>   </document>
> </dataConfig>
> {code}
> If the {{cursorMark}} attribute is missing or is not {{'true'}} then the default start/rows pagination is used.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscribe@lucene.apache.org
For additional commands, e-mail: dev-help@lucene.apache.org