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https://issues.apache.org/jira/browse/SOLR-11982?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16431861#comment-16431861
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Ere Maijala commented on SOLR-11982:
------------------------------------

While I like shards.routing, to me (a non-native English speaker) it sounds 
stronger to me than shards.preference. That would speak for using 
shards.preference since it really just sets the preferred order and doesn't 
exclude others. Either way is fine with me though, I'd just like to use this 
with one name or another.

> Add support for indicating preferred replica types for queries
> --------------------------------------------------------------
>
>                 Key: SOLR-11982
>                 URL: https://issues.apache.org/jira/browse/SOLR-11982
>             Project: Solr
>          Issue Type: Improvement
>      Security Level: Public(Default Security Level. Issues are Public) 
>          Components: SolrCloud
>    Affects Versions: 7.4, master (8.0)
>            Reporter: Ere Maijala
>            Assignee: Tomás Fernández Löbbe
>            Priority: Minor
>              Labels: patch-available, patch-with-test
>         Attachments: SOLR-11982-preferReplicaTypes.patch, 
> SOLR-11982-preferReplicaTypes.patch, SOLR-11982.patch, SOLR-11982.patch, 
> SOLR-11982.patch, SOLR-11982.patch, SOLR-11982.patch, SOLR-11982.patch, 
> SOLR-11982.patch, SOLR-11982.patch
>
>
> It would be nice to have the possibility to easily sort the shards in the 
> preferred order e.g. by replica type. The attached patch adds support for 
> {{shards.sort}} parameter that allows one to sort e.g. PULL and TLOG replicas 
> first with \{{shards.sort=replicaType:PULL|TLOG }}(which would mean that NRT 
> replicas wouldn't be hit with queries unless they're the only ones available) 
> and/or to sort by replica location (like preferLocalShards=true but more 
> versatile).



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