[jira] [Created] (SOLR-14613) Provide a clean API for pluggable autoscaling implementations

["Andrzej Bialecki (Jira)" <ji...@apache.org>]

Andrzej Bialecki created SOLR-14613:
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             Summary: Provide a clean API for pluggable autoscaling implementations
                 Key: SOLR-14613
                 URL: https://issues.apache.org/jira/browse/SOLR-14613
             Project: Solr
          Issue Type: Improvement
      Security Level: Public (Default Security Level. Issues are Public)
          Components: AutoScaling
            Reporter: Andrzej Bialecki


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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