[jira] [Resolved] (IGNITE-18159) Implement splitting of an Ignite node hosting a learner and a follower from the same Raft group

["Aleksandr Polovtcev (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IGNITE-18159?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Aleksandr Polovtcev resolved IGNITE-18159.
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    Resolution: Won't Fix

> Implement splitting of an Ignite node hosting a learner and a follower from the same Raft group
> -----------------------------------------------------------------------------------------------
>
>                 Key: IGNITE-18159
>                 URL: https://issues.apache.org/jira/browse/IGNITE-18159
>             Project: Ignite
>          Issue Type: Task
>            Reporter: Aleksandr Polovtcev
>            Priority: Major
>              Labels: ignite-3
>
> As described in IGNITE-18070, we need to implement one of the scenarios that will allow us to have a single Ignite node hosting a follower and a learner from the same Raft group. This ticket focuses on a case when a node gets "split", that is, when after calculating the assignments, a follower (or a learner) gets moved to a different Ignite node. 
> The algorithm looks like the following: after stable assignments have been changes, we simply destroy the follower's (or learner's, whichever gets moved)  storage data (looks like a good place for that would be inside the {{metaStorageMgr.registerWatchByPrefix(ByteArray.fromString(STABLE_ASSIGNMENTS_PREFIX)}} listener in the {{TableManager}}) on the node that gets "split" . The other node should simply start the corresponding Raft service as usual, its data would be transferred by Raft replication.



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