[jira] [Created] (SOLR-12536) Enhance autoscaling policy to equally distribute replicas on the basis of arbitrary properties

["Noble Paul (JIRA)" <ji...@apache.org>]

Noble Paul created SOLR-12536:
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             Summary: Enhance autoscaling policy to equally distribute replicas on the basis of arbitrary properties
                 Key: SOLR-12536
                 URL: https://issues.apache.org/jira/browse/SOLR-12536
             Project: Solr
          Issue Type: Sub-task
      Security Level: Public (Default Security Level. Issues are Public)
            Reporter: Noble Paul
            Assignee: Noble Paul


{code:java}
{"replica" : "#EQUAL"  , "shard" : "#EACH" , "port" : "#EACH" }
//if the ports are "8983", "7574", "7575", the above rule is equivalent to
{"replica" : "<2"  , "shard" : "#EACH" , "port" : ["8983", "7574", "7575"]}{code}
*case 1*: {{numShards =2, replicationFactor=3}} . In  this case all the nodes are divided into 3 buckets each containing nodes in that port. Each bucket must contain {{3 * 2 /3 =2}} replicas 


{"replica" : "#EQUAL"  , "sysprop.zone" : "#EACH"}
{code}
*case 1*: numShards = 3, replicationFactor=1, zones are : {{east}}, {{west}} (total = 2)

this means each zone must have equal replicas . {{total replicas = 3 * 1 = 3}}, {{total zones = 2}} , {{replicas per zone = 3/2 = 1.5}}

{code:java}
{"replica" : "#EQUAL"  , "shard" : "#EACH" , "sysprop.zone" : "#EACH" }
//if the zones are "east_1", "east_2", "west_1", the above rule is equivalent to
{"replica" : "<2"  , "shard" : "#EACH" , "port" : ["east_1", "east_2", "west_1"]}{code}

The behavior is equivalent to the above



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