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From "Andy Laird (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-2592) Pluggable shard lookup mechanism for SolrCloud
Date Tue, 31 Jul 2012 18:34:35 GMT

    [ https://issues.apache.org/jira/browse/SOLR-2592?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13426000#comment-13426000
] 

Andy Laird commented on SOLR-2592:
----------------------------------

Requiring that the document never move to a different slice is certainly ideal but a very
important use case involves field collapsing.  The only way to make the counts work for field-collapsed
results in a multi-shard setup is to ensure that docs with the same to-be-collapsed value
reside on the same slice.  If that field changes we may have to move the document, I don't
see any way around that (unless someone can make field collapse counts work in distributed
setups).  Does ElasticSearch handle field-collapse for multi-shards?

                
> Pluggable shard lookup mechanism for SolrCloud
> ----------------------------------------------
>
>                 Key: SOLR-2592
>                 URL: https://issues.apache.org/jira/browse/SOLR-2592
>             Project: Solr
>          Issue Type: New Feature
>          Components: SolrCloud
>    Affects Versions: 4.0-ALPHA
>            Reporter: Noble Paul
>            Assignee: Mark Miller
>         Attachments: SOLR-2592.patch, SOLR-2592_rev_2.patch, dbq_fix.patch, pluggable_sharding.patch,
pluggable_sharding_V2.patch
>
>
> If the data in a cloud can be partitioned on some criteria (say range, hash, attribute
value etc) It will be easy to narrow down the search to a smaller subset of shards and in
effect can achieve more efficient search.  

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