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https://issues.apache.org/jira/browse/SOLR-11982?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16500222#comment-16500222
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Ere Maijala commented on SOLR-11982:
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That's an issue if its type is still TLOG while it's serving as the leader. I'm
under the impression that this should be a temporary situation, however, so it
might very well be justified e.g. if the replica is on hardware that has the
best capacity for handling queries. That's a hairy situation, though, since
it's difficult to say what's the best thing to do. The logic could probably be
extended with an option to prefer non-leaders.
> 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
> Fix For: 7.4, master (8.0)
>
> 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, 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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