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https://issues.apache.org/jira/browse/IGNITE-7806?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16449767#comment-16449767
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Dmitriy Pavlov commented on IGNITE-7806:
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Please mention patch which is available.
> SQL TX: Backup update protocol
> ------------------------------
>
> Key: IGNITE-7806
> URL: https://issues.apache.org/jira/browse/IGNITE-7806
> Project: Ignite
> Issue Type: Task
> Components: cache, sql
> Reporter: Vladimir Ozerov
> Assignee: Roman Kondakov
> Priority: Major
>
> Currently TX SQL protocol works as follows:
> 1) Lock request is sent to {{PRIMARY}} node where updates are applied
> immediately.
> 2) Updated values are stored in-memory
> 3) When commit command is issued, updates are propagated to {{BACKUP}}s.
> This requires data to be stored in memory at some point. We should design
> better protocol which will allow for updates to be propagated to backups
> efficiently.
> Ticket is related (or may be even duplicates) to IGNITE-7186.
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