[jira] [Assigned] (IGNITE-29098) Add PersistenceEnabled metric to expose data region type

["Ilya Shishkov (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IGNITE-29098?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ilya Shishkov reassigned IGNITE-29098:
--------------------------------------

    Assignee: Ilya Shishkov

> Add PersistenceEnabled metric to expose data region type
> --------------------------------------------------------
>
>                 Key: IGNITE-29098
>                 URL: https://issues.apache.org/jira/browse/IGNITE-29098
>             Project: Ignite
>          Issue Type: Task
>            Reporter: Ilya Shishkov
>            Assignee: Ilya Shishkov
>            Priority: Minor
>             Fix For: 2.19
>
>
> h2. Description
> Currently there is no way to determine whether a data region is persistent or in-memory from its metrics. This ticket adds a boolean metric {{PersistenceEnabled}} to each data region, published in the {{io.dataregion.<name>}} registry and exposed via JMX, the read API, and the legacy {{DataRegionMetrics}} interface. It returns {{true}} for persistent regions and {{false}} for in-memory regions, determined once at startup. The fix also adds {{DataRegionMetrics.isPersistenceEnabled()}} implemented in {{DataRegionMetricsImpl}} and {{{}DataRegionMetricsSnapshot{}}}, without changing exporters, configuration classes, or the persistence engine.
> h2. Acceptance Criteria
>  * Every data region exposes the {{PersistenceEnabled}} metric after node startup.
>  * Value is {{true}} for persistent regions and {{false}} for in-memory regions.
>  * Value always matches the region's persistence configuration.
>  * Metric is visible in standard monitoring (e.g., JMX) alongside other data region metrics.
>  * Existing data region metrics behave unchanged.



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