[jira] [Commented] (COUCHDB-3288) Allow mixed clusters for PSE deployment

["ASF subversion and git services (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/COUCHDB-3288?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16162003#comment-16162003 ] 

ASF subversion and git services commented on COUCHDB-3288:
----------------------------------------------------------

Commit 8cf02bd5f3b11d2da6965edb22d34f5ef657495e 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=8cf02bd ]

Allow for mixed db record definitions

This change is to account for differences in the #db record when a
cluster is operating in a mixed version state (i.e., when running a
rolling reboot to upgrade).

There are only a few operations that are valid on #db records that are
shared between nodes so rather than attempt to map the entire API
between the old and new records we're limiting to just the required API
calls.

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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