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https://issues.apache.org/jira/browse/HDDS-3079?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Stephen O'Donnell updated HDDS-3079:
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Summary: Extract Rack Specific code from Container and Pipeline placement
policies into a common parent (was: Consider merging PipelinePlacementPolicy
and SCMContainerPlacementPolicyRackAware)
> Extract Rack Specific code from Container and Pipeline placement policies
> into a common parent
> ----------------------------------------------------------------------------------------------
>
> Key: HDDS-3079
> URL: https://issues.apache.org/jira/browse/HDDS-3079
> Project: Hadoop Distributed Data Store
> Issue Type: Sub-task
> Affects Versions: 0.6.0
> Reporter: Stephen O'Donnell
> Priority: Major
>
> The Ratis pipeline provider uses a class PipelinePlacementPolicy to selection
> datanodes for new pipelines in a rack aware fashion. This class also
> considers server load when selecting hosts and in the future, it may have
> more features.
> However, SCMContainerPlacementPolicyRackAware implements very similar rack
> aware node choosing logic and is used by the replication manager.
> It is possible these two implementations could diverge and it also means we
> have two places to make changes if there are any improvements made.
> It would be worth investigating if at least the rack aware node choosing
> logic can be shared between these two classes, or even better the same class
> can be used for both.
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