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https://issues.apache.org/jira/browse/DERBY-2921?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12520567
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Rick Hillegas commented on DERBY-2921:
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Thanks, Narayanan. I think that this solution is adequate for a first rev. The
version handshake will let replication fail gracefully as necessary at upgrade
time. Just to be clear, I think that the version id in question is the version
of the code (the Derby jar files), not the version level of the data. If you
have to get your hands on the version level of the data, then you may have to
tackle some tricky soft-upgrade issues.
> Replication: Add a network service that connects the master and slave Derby
> instances
> -------------------------------------------------------------------------------------
>
> Key: DERBY-2921
> URL: https://issues.apache.org/jira/browse/DERBY-2921
> Project: Derby
> Issue Type: Sub-task
> Components: Services
> Affects Versions: 10.4.0.0
> Reporter: Jørgen Løland
> Assignee: V.Narayanan
> Attachments: Replication_Network_v1.diff, Replication_Network_v1.stat
>
>
> A network connection is required between the master and slave Derby instances
> of a replicated database. The connection will be used to send many kinds of
> messages, including:
> * log records
> * the database (when replication is started)
> * master -> slave commands (like "stop replication")
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