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https://issues.apache.org/jira/browse/COUCHDB-3288?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16008275#comment-16008275
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ASF subversion and git services commented on COUCHDB-3288:
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Commit a9a23b89ccf48b1b0e106111789a6d4ae5cf9631 in couchdb's branch
refs/heads/COUCHDB-3288-mixed-cluster-upgrade from [~paul.joseph.davis]
[ https://gitbox.apache.org/repos/asf?p=couchdb.git;h=a9a23b8 ]
Update couch_server to not use the db record
This removes introspection of the #db record by couch_server. While its
required for the pluggable storage engine upgrade, its also nice to
remove the hacky overloading of #db record fields for couch_server
logic.
COUCHDB-3288
> Allow mixed clusters for PSE deployment
> ---------------------------------------
>
> Key: COUCHDB-3288
> URL: https://issues.apache.org/jira/browse/COUCHDB-3288
> Project: CouchDB
> Issue Type: Improvement
> Reporter: Paul Joseph Davis
>
> To enable a mixed cluster upgrade (i.e., rolling reboot upgrade) we need to
> do some preparatory work to remove access to the #db{} record since this
> record is shared between nodes.
> This work is all straight forward and just involves changing things like
> Db#db.main_pid to couch_db:get_main_pid(Db) or similar.
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