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https://issues.apache.org/jira/browse/SOLR-5092?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Isaac Hebsh closed SOLR-5092.
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Resolution: Duplicate
> Send shard request to multiple replicas
> ---------------------------------------
>
> Key: SOLR-5092
> URL: https://issues.apache.org/jira/browse/SOLR-5092
> Project: Solr
> Issue Type: Improvement
> Components: clients - java, SolrCloud
> Affects Versions: 4.4
> Reporter: Isaac Hebsh
> Priority: Minor
> Labels: distributed, performance, shard, solrcloud
> Attachments: SOLR-5092.patch
>
>
> We have a case on a SolrCloud cluster. Queries takes too much QTime, due to a
> randomly slow shard request. In a noticeable part of queries, the slowest
> shard consumes more than 4 times qtime than the average.
> Of course, deep inspection of the performance factor should be made on the
> specific environment.
> But, there is one more idea:
> If shard request will be sent to all of the replicas of each shard, the
> probability of all the replicas of the same shard to be the slowest is very
> small. Obviously cluster works harder, but on a (very) low qps, it might be
> OK.
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