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Posted to dev@lucene.apache.org by "Shalin Shekhar Mangar (JIRA)" <ji...@apache.org> on 2018/02/14 23:24:00 UTC

[jira] [Created] (SOLR-11990) Make it possible to co-locate replicas of multiple collections together in a node using policy

Shalin Shekhar Mangar created SOLR-11990:
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             Summary: Make it possible to co-locate replicas of multiple collections together in a node using policy
                 Key: SOLR-11990
                 URL: https://issues.apache.org/jira/browse/SOLR-11990
             Project: Solr
          Issue Type: Sub-task
      Security Level: Public (Default Security Level. Issues are Public)
          Components: AutoScaling, SolrCloud
            Reporter: Shalin Shekhar Mangar
             Fix For: master (8.0), 7.3


It is necessary to co-locate replicas of different collection together in a node when cross-collection joins are performed. The policy rules framework should support this use-case.

Example: Co-locate exactly 1 replica of collection A in each node where a replica of collection B is present.
{code}
{"replica":1, "collection":"A", "shard":"#EACH", "withCollection":"B"}
{code}

This requires changing create collection, create shard and add replica APIs as well because we want a replica of collection A to be created first before a replica of collection B is created so that join queries etc are always possible.



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