[jira] [Created] (SOLR-5501) Ability to work with cold replicas

["Manuel Lenormand (JIRA)" <ji...@apache.org>]

Manuel Lenormand created SOLR-5501:
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             Summary: Ability to work with cold replicas
                 Key: SOLR-5501
                 URL: https://issues.apache.org/jira/browse/SOLR-5501
             Project: Solr
          Issue Type: Improvement
          Components: SolrCloud
    Affects Versions: 4.5.1
            Reporter: Manuel Lenormand
             Fix For: 4.7


Following this conversation from the mailing list:
http://lucene.472066.n3.nabble.com/Proposal-for-new-feature-cold-replicas-brainstorming-td4097501.html

Should give the ability to use replicas mainly as backup cores and not for handling high qps rate. 

This way you would avoid using the caching ressources (solr and OS) used when routing a query to a replica. 
With many replicas it's harder hitting the solr cache (same query may hit another replica) and having many replicas on the same instance would cause a useless competition on the OS memory for caching.



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