[jira] Updated: (SOLR-705) Distributed search should optionally return docID->shard map

["Lars Kotthoff (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SOLR-705?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Lars Kotthoff updated SOLR-705:
-------------------------------

    Attachment: SOLR-705.patch

Starting implementation, setting the "shardMapping" parameter to any value in the request will add the field "shard" to each response document containing the shard as specified in the request.

* Currently only implemented for XML responses.
* No tests.
* When a document is found in multiple shards, the last one sets the value, the others are lost. Returning an array of all the shards would probably better.

This code is almost untested.

> Distributed search should optionally return docID->shard map
> ------------------------------------------------------------
>
>                 Key: SOLR-705
>                 URL: https://issues.apache.org/jira/browse/SOLR-705
>             Project: Solr
>          Issue Type: Improvement
>    Affects Versions: 1.3
>         Environment: all
>            Reporter: Brian Whitman
>             Fix For: 1.4
>
>         Attachments: SOLR-705.patch
>
>
> SOLR-303 queries with &shards parameters set need to return the dociD->shard mapping in the response. Without it, updating/deleting documents when the # of shards is variable is hard. We currently set this with a special requestHandler that filters /update and inserts the shard as a field in the index but it would be better if the shard location came back in the query response outside of the index.

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