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https://issues.apache.org/jira/browse/IGNITE-426?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dmitriy Setrakyan updated IGNITE-426:
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Issue Type: Sub-task (was: Task)
Parent: IGNITE-1191
> Make sure continuous queries notifications are not missed in case primary
> node fails
> ------------------------------------------------------------------------------------
>
> Key: IGNITE-426
> URL: https://issues.apache.org/jira/browse/IGNITE-426
> Project: Ignite
> Issue Type: Sub-task
> Reporter: Yakov Zhdanov
> Assignee: Valentin Kulichenko
> Priority: Critical
>
> * Maintain updates queue on backup node(s) in addition to primary node.
> * If primary node crushes, this queue is flushed to listening clients.
> * To avoid notification duplicates we will have a per-partition update
> counter. Once an entry in some partition is updated, counter for this
> partition is incremented on both primary and backups. The value of this
> counter is also sent along with the update to the client, which also
> maintains the copy of this mapping. If at some moment it receives an update
> with the counter less than in its local map, this update is a duplicate and
> can be discarded.
> * Also need to figure out the best way to clean the backup queue if topology
> is stable. TBD.
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