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https://issues.apache.org/jira/browse/SOLR-6491?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14134978#comment-14134978
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Noble Paul edited comment on SOLR-6491 at 9/16/14 5:20 AM:
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It was just an FYI . Just in case it helps you
BTW , to add to Shalin's point . I'm not yet convinced that the performance not
is significant enough . Do we have any real users reporting this as a problem?
was (Author: noble.paul):
It was just an FYI . Just in case it helps you
> Add preferredLeader as a ROLE and a collections API command to respect this
> role
> --------------------------------------------------------------------------------
>
> Key: SOLR-6491
> URL: https://issues.apache.org/jira/browse/SOLR-6491
> Project: Solr
> Issue Type: Improvement
> Affects Versions: 4.11, 5.0
> Reporter: Erick Erickson
> Assignee: Erick Erickson
>
> Leaders can currently get out of balance due to the sequence of how nodes are
> brought up in a cluster. For very good reasons shard leadership cannot be
> permanently assigned.
> However, it seems reasonable that a sys admin could optionally specify that a
> particular node be the _preferred_ leader for a particular collection/shard.
> During leader election, preference would be given to any node so marked when
> electing any leader.
> So the proposal here is to add another role for preferredLeader to the
> collections API, something like
> ADDROLE?role=preferredLeader&collection=collection_name&shard=shardId
> Second, it would be good to have a new collections API call like
> ELECTPREFERREDLEADERS?collection=collection_name
> (I really hate that name so far, but you see the idea). That command would
> (asynchronously?) make an attempt to transfer leadership for each shard in a
> collection to the leader labeled as the preferred leader by the new ADDROLE
> role.
> I'm going to start working on this, any suggestions welcome!
> This will subsume several other JIRAs, I'll link them momentarily.
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