Amrit Sarkar created SOLR-13329:
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Summary: 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
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 first 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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