Shalin Shekhar Mangar created SOLR-11985:

             Summary: Allow percentage in replica attribute in policy
                 Key: SOLR-11985
             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

Today we can only specify an absolute number in the 'replica' attribute in the 
policy rules. It'd be useful to write a percentage value to make certain 
use-cases easier. For example:

// Keep a third of the the replicas of each shard in east region
{"replica" : "<34%", "shard" : "#EACH", "sysprop:region": "east"}
// Keep two thirds of the the replicas of each shard in west region
{"replica" : "<67%", "shard" : "#EACH", "sysprop:region": "west"}

Today the above must be represented by different rules for each collection if 
they have different replication factors. Also if the replication factor changes 
later, the absolute value has to be changed in tandem. So expressing a 
percentage removes both of these restrictions.

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