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From "Vladimir Ozerov (JIRA)" <j...@apache.org>
Subject [jira] [Created] (IGNITE-7806) SQL TX: Backup update protocol
Date Mon, 26 Feb 2018 08:02:00 GMT
Vladimir Ozerov created IGNITE-7806:
---------------------------------------

             Summary: 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


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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