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https://issues.apache.org/jira/browse/SOLR-264?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12506284
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Hoss Man commented on SOLR-264:
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the only clean way to do this that i know of i to build aFieldCache-esque rray
of size maxDoc, put a random number of each doc into that array, and then use
that array to get the sortValue ... document order is randomized, but
consistent for all uses of the same array (if you leverage the FieldCache
custom type, that means its' consistent per IndexReader)
this was brought up recently on java-user, after i suggested an alternative
approach of just promoting N randomly selected docs to the front of the results
(where N is greater then your expected pagination...
http://www.nabble.com/Several-questions-about-scoring-sorting-%2B-random-sorting-in-an-image-related-application-tf3928435.html#a11141191
> Support 'random' sort order
> ---------------------------
>
> Key: SOLR-264
> URL: https://issues.apache.org/jira/browse/SOLR-264
> Project: Solr
> Issue Type: New Feature
> Reporter: Ryan McKinley
> Priority: Minor
> Attachments: SOLR-264-RandomSortOrder.patch,
> SOLR-264-RandomSortOrder.patch, SOLR-264-RandomSortOrder.patch
>
>
> Support querying for random documents:
> http://localhost:8983/solr/select/?q=*:*&fl=sku&sort=random%20desc
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