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https://issues.apache.org/jira/browse/SOLR-13329?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16849421#comment-16849421
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Noble Paul commented on SOLR-13329:
-----------------------------------
I would like to add the following syntaxes with a new {{nodeset}} attribute
eg: 1
Keep exactly one replica in a set of nodes {{node-1}}, {{node-2}}
{code:js}
{"replica" : 1 , "shard" : "#EACH" , "nodeset" : ["node-1","node-2"]}
{code}
Keep exactly one replica in a set of nodes with system-property {{"prop-name"==
"prop-val"}}
{code:js}
{"replica" : 1 , "shard" : "#EACH" , "nodeset" : {"system-property" :
{"prop-name": "prop-val"} } }
{code}
Keep exactly one replica in a set of nodes on port {{8901}},{{8902}}
{code:js}
{"replica" : 1 , "shard" : "#EACH" , "nodeset" : {"port" : [8901,8902] } }
{code}
this could be usable with any of the other properties as well such as
{{nodeRole}}, {{freedisk}} , {{diskType}}
> Placing exact number of replicas on a set of solr nodes, instead of each solr
> node.
> -----------------------------------------------------------------------------------
>
> Key: SOLR-13329
> URL: https://issues.apache.org/jira/browse/SOLR-13329
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Components: AutoScaling
> Affects Versions: master (9.0)
> Reporter: Amrit Sarkar
> Priority: Major
>
> Let's say we have a requirement where we would like to place:
> {code}
> exact X replica on a set of solr nodes comprises of solr-node-1, solr-node-2,
> ... solr-node-N.
> {code}
> e.g. exact 1 replica on either of the respective 3 solr nodes, solr-node-1,
> solr-node-2, solr-node-3, and rest of the replicas can be placed on
> corresponding solr nodes.
> Right now we don't have a straightforward manner of doing the same.
> Autoscaling cluster policy also doesn't support such behavior, but instead
> takes an array of solr node names and treat them as separate rules as per
> https://lucene.apache.org/solr/guide/7_7/solrcloud-autoscaling-policy-preferences.html#sysprop-attribute.
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