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Posted to dev@lucene.apache.org by "Tomás Fernández Löbbe (JIRA)" <ji...@apache.org> on 2018/06/05 17:50:00 UTC
[jira] [Comment Edited] (SOLR-11982) Add support for indicating
preferred replica types for queries
[ https://issues.apache.org/jira/browse/SOLR-11982?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16500426#comment-16500426 ]
Tomás Fernández Löbbe edited comment on SOLR-11982 at 6/5/18 5:49 PM:
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I think this is expected, at least with the current state of things. A TLOG replica that is leader doesn't stop being a TLOG replica (the replica type is recorded on the cluster state and doesn't change). IMO, what we want is a rule that one can use to prefer leader (or not leader, which would be more common). Something like {{shards.preference=isLeader:false replicaType:TLOG}}
was (Author: tomasflobbe):
I think this is expected, at least with the current state of things. A TLOG replica that is leader doesn't stop being a TLOG replica (the replica type is recorded on the cluster state and doesn't change). IMO, what we want is a rule that one can use to prefer leader (or not leader, which would be more common). Something like {{shards.prefernce=isLeader:false replicaType:TLOG}}
> 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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