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https://issues.apache.org/jira/browse/SOLR-14613?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17197261#comment-17197261
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ASF subversion and git services commented on SOLR-14613:
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Commit c7d234cafd37d824ff6642b449d3cb333d1e4a9a in lucene-solr's branch
refs/heads/master from Ilan Ginzburg
[ https://gitbox.apache.org/repos/asf?p=lucene-solr.git;h=c7d234c ]
SOLR-14613: Autoscaling replacement using placement plugins
Allow using placement plugins to compute replica placement on the cluster for
Collection API calls.
This is the first code drop for the replacement of the Autoscaling feature.
Javadoc of sample plugin
org.apache.solr.cluster.placement.plugins.SamplePluginAffinityReplicaPlacement
details how to enable this replica placement strategy.
PR's #1684 then #1845
> Provide a clean API for pluggable replica assignment implementations
> --------------------------------------------------------------------
>
> Key: SOLR-14613
> URL: https://issues.apache.org/jira/browse/SOLR-14613
> Project: Solr
> Issue Type: Improvement
> Components: AutoScaling
> Reporter: Andrzej Bialecki
> Assignee: Ilan Ginzburg
> Priority: Major
> Time Spent: 40h 40m
> Remaining Estimate: 0h
>
> As described in SIP-8 the current autoscaling Policy implementation has
> several limitations that make it difficult to use for very large clusters and
> very large collections. SIP-8 also mentions the possible migration path by
> providing alternative implementations of the placement strategies that are
> less complex but more efficient in these very large environments.
> We should review the existing APIs that the current autoscaling engine uses
> ({{SolrCloudManager}} , {{AssignStrategy}} , {{Suggester}} and related
> interfaces) to see if they provide a sufficient and minimal API for plugging
> in alternative autoscaling placement strategies, and if necessary refactor
> the existing APIs.
> Since these APIs are internal it should be possible to do this without
> breaking back-compat.
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