[jira] [Assigned] (IGNITE-17302) Raft listener multi-storage support

["Vyacheslav Koptilin (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IGNITE-17302?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Vyacheslav Koptilin reassigned IGNITE-17302:
--------------------------------------------

    Assignee: Mirza Aliev

> Raft listener multi-storage support 
> ------------------------------------
>
>                 Key: IGNITE-17302
>                 URL: https://issues.apache.org/jira/browse/IGNITE-17302
>             Project: Ignite
>          Issue Type: Improvement
>            Reporter: Alexander Lapin
>            Assignee: Mirza Aliev
>            Priority: Major
>              Labels: ignite-3, transaction3_rw
>
> It's supposed that replication state machine (e.g. RaftGroupListener) will handle multiple storages. For example PartitionListener will use:
>  * MvPartitionStorage - common multi-version partition storage for core partition data.
>  * Both volatile and persistent lock storages IGNITE-15932.
>  * Persistent storage for txn state IGNITE-15931.
>  * Index storages.
> Generally speaking replication logic is decoupled from data-storages, and there are only few intersection points:
>  * Raft log truncation - in order to safely truncate raft log it's required to take into consideration all checkpointIndexes for all storages of the given state machine and perform min(storage1.checkpointIndex, storage2.checkpointIndex, ... ) truncation. Besides that it's important for storages to skip already applied commands on raft log replay - storage indexes to the rescue. See IGNITE-16907 for more details. Such modifications will also effect PartitionListener.onSnapshotLoad()/onSnapshotSave() methods.
>  * It's required to update local node recovery process a bit: a node must enter the logical topology only after restoring all local raft nodes, including both restoring storages from corresponding snapshot and applying raft log.



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