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https://issues.apache.org/jira/browse/IGNITE-18525?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Alexander Lapin updated IGNITE-18525:
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Summary: Introduce new PlacementDriver Ignite component (was: Introduce
new PlacementDriver Ignite component.)
> Introduce new PlacementDriver Ignite component
> ----------------------------------------------
>
> Key: IGNITE-18525
> URL: https://issues.apache.org/jira/browse/IGNITE-18525
> Project: Ignite
> Issue Type: Improvement
> Reporter: Alexander Lapin
> Priority: Major
> Labels: ignite-3
>
> h3. Motivation
> Placement Driver is expected to be used as
> * A leaseholder tracker, or in other words, an engine for replication groups
> leases selection and fail-over.
> * Distributed meta data propagator, such as safe time, will be implemented
> in Placement Driver [Part 2] though.
> This is an initial ticket, a sort of utility one, that will introduce new
> PlacementDriver Ignite component, add corresponding dependencies wihtin mvn
> and gradle and incorporate the component into node start/stop flow.
> h3. Definition of Done
> * New Placement Driver Ignite Component is introduced along with
> corresponding decencies (e.g. meta storage), busy locks, etc.
> * It's properly started and stopped withing Ignite node start/stop process.
> h3. Implementation Notes
> Pretty straightforward. The one to mention is that introducing new component
> will required to update tests and mocks, however because at this point
> placement driver does nothing it'll possible to use nulls almost everywhere.
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