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https://issues.apache.org/jira/browse/SOLR-6027?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14001560#comment-14001560
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Jan Høydahl commented on SOLR-6027:
-----------------------------------
Perhaps rename this JIRA -> "Real World Awareness for SolrCloud", encompassing
host awareness, rack awareness, datacenter awareness whatever... Agree that it
would make sense to have this pluggable or scriptable in some way.
> Replica assignments should try to take the host name into account so all
> replicas don't end up on the same host
> ---------------------------------------------------------------------------------------------------------------
>
> Key: SOLR-6027
> URL: https://issues.apache.org/jira/browse/SOLR-6027
> Project: Solr
> Issue Type: Improvement
> Components: SolrCloud
> Reporter: Timothy Potter
> Priority: Minor
> Attachments: SOLR-6027.patch
>
>
> I have 18 SolrCloud nodes distributed across 3 Ec2 instances, so 6 per
> instance. One of my collections was created with all replicas landing on
> different SolrCloud nodes on the same instance. Ideally, SolrCloud would be a
> little smarter and ensure that at least one of the replicas was on one of the
> other hosts.
> shard4: {
>
> http://ec2-??-??-??-239.compute-1.amazonaws.com:8988/solr/med_collection_shard4_replica1/
> LEADER
>
> http://ec2-??-??-??-239.compute-1.amazonaws.com:8984/solr/med_collection_shard4_replica3/
>
>
> http://ec2-??-??-??-239.compute-1.amazonaws.com:8985/solr/med_collection_shard4_replica2/
>
> }
> I marked this as minor for now as it could be argued that I shouldn't be
> running that many Solr nodes per instance, but I'm seeing plenty of installs
> that are using higher-end instance types / server hardware and then running
> multiple Solr nodes per host.
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