[jira] [Created] (IGNITE-13189) Maintenance mode switch and defragmentation process initialization

[Anton Vinogradov (Jira)]

Sergey Chugunov created IGNITE-13189:
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             Summary: Maintenance mode switch and defragmentation process initialization
                 Key: IGNITE-13189
                 URL: https://issues.apache.org/jira/browse/IGNITE-13189
             Project: Ignite
          Issue Type: Sub-task
            Reporter: Sergey Chugunov


As described in IEP-47 defragmentation is performed when a node enters a special mode called maintenance mode.

Discussion on dev-list clarifies algorithm to enter maintenance mode:
 # Special key is written to local metastorage.
 # Node is restarted.
 # Node observes the key on startup and enters maintenance mode.

Node should be fully-functioning in that mode but should not join the rest of the cluster and participate in any regular activity like handling cache operations.



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