[jira] [Updated] (IGNITE-13658) Volatile cache writes to persistent storage.

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

     [ https://issues.apache.org/jira/browse/IGNITE-13658?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ilya Kasnacheev updated IGNITE-13658:
-------------------------------------
    Fix Version/s: 2.10

> Volatile cache writes to persistent storage.
> --------------------------------------------
>
>                 Key: IGNITE-13658
>                 URL: https://issues.apache.org/jira/browse/IGNITE-13658
>             Project: Ignite
>          Issue Type: Bug
>          Components: data structures
>    Affects Versions: 2.9
>            Reporter: Stanilovsky Evgeny
>            Assignee: Stanilovsky Evgeny
>            Priority: Major
>             Fix For: 2.10
>
>          Time Spent: 20m
>  Remaining Estimate: 0h
>
> Various cluster synchronization primitives (latch, lock, semaphore e.t.c) are using volatile cache (`default-volatile-ds-group`). State of this primitives does not make sense on storage (restore, recovery), primitive's state is useful only for process in action.
> But it was stored in system data region.
> {noformat}
> if (cacheType != CacheType.USER && cfg.getDataRegionName() == null)            
>  cfg.setDataRegionName(cacheProcessor.context().database().systemDateRegionName());
> {noformat}
> Which persisted if cluster have any persistent region:
> {noformat}
>         addDataRegion(
>             memCfg,
>             createSystemDataRegion(
>                 memCfg.getSystemRegionInitialSize(),
>                 memCfg.getSystemRegionMaxSize(),
>                 CU.isPersistenceEnabled(memCfg)
>             ),
>             CU.isPersistenceEnabled(memCfg)
>         );
> {noformat}
> Should to have dedicate system region for volatile cache, and it should be in-memory.



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