[
https://issues.apache.org/jira/browse/SOLR-6517?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14154720#comment-14154720
]
Noble Paul commented on SOLR-6517:
----------------------------------
Let me try to explain how I think of the feature
* A user wants to move the shard leader to a particular replica and he invokes
a action=SETREPLICAPROP&prop=prefrerredLeader&val=true . Here I should be able
to pass a param "sliceUnique=true" which will remove the property from other
replicas if the param is not passed two replicas will have the same value
* When this command is invoked it can act exactly like the [overseer role
command |
https://cwiki.apache.org/confluence/display/solr/Collections+API#CollectionsAPI-api15AddRole]
.If there are more than one preferred leaders choose whichever is
available/first in the queue
* This kicks in when a down replica comes back up also
> CollectionsAPI call ELECTPREFERREDLEADERS
> -----------------------------------------
>
> Key: SOLR-6517
> URL: https://issues.apache.org/jira/browse/SOLR-6517
> Project: Solr
> Issue Type: New Feature
> Affects Versions: 5.0, Trunk
> Reporter: Erick Erickson
> Assignee: Erick Erickson
>
> Perhaps the final piece of SOLR-6491. Once the preferred leadership roles are
> assigned, there has to be a command "make it so Mr. Solr". This is something
> of a placeholder to collect ideas. One wouldn't want to flood the system with
> hundreds of re-assignments at once. Should this be synchronous or asnych?
> Should it make the best attempt but not worry about perfection? Should it???
> a collection=name parameter would be required and it would re-elect all the
> leaders that were on the 'wrong' node
> I'm thinking an optionally allowing one to specify a shard in the case where
> you wanted to make a very specific change. Note that there's no need to
> specify a particular replica, since there should be only a single
> preferredLeader per slice.
> This command would do nothing to any slice that did not have a replica with a
> preferredLeader role. Likewise it would do nothing if the slice in question
> already had the leader role assigned to the node with the preferredLeader
> role.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org
For additional commands, e-mail: dev-h...@lucene.apache.org
