[jira] [Assigned] (SOLR-11985) Allow percentage in replica attribute in policy

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

     [ https://issues.apache.org/jira/browse/SOLR-11985?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Noble Paul reassigned SOLR-11985:
---------------------------------

    Assignee: Noble Paul

> Allow percentage in replica attribute in policy
> -----------------------------------------------
>
>                 Key: SOLR-11985
>                 URL: https://issues.apache.org/jira/browse/SOLR-11985
>             Project: Solr
>          Issue Type: Sub-task
>      Security Level: Public(Default Security Level. Issues are Public) 
>          Components: AutoScaling, SolrCloud
>            Reporter: Shalin Shekhar Mangar
>            Assignee: Noble Paul
>            Priority: Major
>             Fix For: 7.4, master (8.0)
>
>
> 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:
> {code}
> // 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"}
> {code}
> 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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