[jira] [Updated] (SOLR-2066) Search Grouping: support distributed search

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[jira] [Updated] (SOLR-2066) Search Grouping: support distributed search

Michael Gibney (Jira)

     [ https://issues.apache.org/jira/browse/SOLR-2066?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Martijn van Groningen updated SOLR-2066:

    Attachment: SOLR-2066.patch

Attached a rough initial approach for better distributed grouping. This solves distributed grouping in 3 steps. First round trip for getting top groups, second round trip to group documents inside a top group and a third round trip to get the stored fields.

The following parameters will never give correct with this approach:
* group.truncate
* group.ngroups

Some current issues / todos:
* The group.field parameter is now the only supported command.
* In distributed mode group.format=grouped is only the supported format.
* There is some issue with sorting now when a group sort / normal sort has null values.
* Need more tests.
* The code is a bit hacked together now, so there is needs to be cleaned up and restructured.

Other than that it seems to work.

> Search Grouping: support distributed search
> -------------------------------------------
>                 Key: SOLR-2066
>                 URL: https://issues.apache.org/jira/browse/SOLR-2066
>             Project: Solr
>          Issue Type: Sub-task
>            Reporter: Yonik Seeley
>             Fix For: 3.4, 4.0
>         Attachments: SOLR-2066.patch, SOLR-2066.patch, SOLR-2066.patch
> Support distributed field collapsing / search grouping.

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