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https://issues.apache.org/jira/browse/IGNITE-13190?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17238158#comment-17238158
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Alexey Goncharuk commented on IGNITE-13190:
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Ivan, thank you for your effort! Now the PR looks good to me.
> Core defragmentation functions
> ------------------------------
>
> Key: IGNITE-13190
> URL: https://issues.apache.org/jira/browse/IGNITE-13190
> Project: Ignite
> Issue Type: Sub-task
> Reporter: Sergey Chugunov
> Assignee: Ivan Bessonov
> Priority: Major
> Labels: IEP-47
> Time Spent: 8h 20m
> Remaining Estimate: 0h
>
> The following set of functions covering defragmentation happy-case needed:
> * Initialization of defragmentation manager when node is started in
> maintenance mode.
> * Information about partition files is gathered by defrag mgr.
> * For each partition file corresponding file of defragmented partition is
> created and initialized.
> * Keys are transferred from old partitions to new partitions.
> * Checkpointer is aware of new partition files and flushes defragmented
> memory to new partition files.
>
> No fault-tolerance code nor index defragmentation mappings are needed in this
> task.
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