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https://issues.apache.org/jira/browse/SOLR-2765?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13122409#comment-13122409
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Mark Miller commented on SOLR-2765:
-----------------------------------

hmmm...you know forever I have been trying to avoid juggling potentially 100's 
to 1000's of watchers per node like that. Perhaps it really is the lesser of 
all evils though? This whole situation is why I initially avoided incremental 
update and it only went in recently. How many zk nodes do you tend to see in 
that project with lots of watchers?

The problem with live nodes is that its per solr instance, and some of this 
info will probably want to be per core? if we made a new structure that put 
cores/shards under a solr instance node, I guess that could reduce the number 
watches needed - but I wonder if it's worth the effort - I'd almost rather see 
the full watcher option on the current node structure fall down first...
                
> Shard/Node states
> -----------------
>
>                 Key: SOLR-2765
>                 URL: https://issues.apache.org/jira/browse/SOLR-2765
>             Project: Solr
>          Issue Type: Sub-task
>          Components: SolrCloud, update
>            Reporter: Yonik Seeley
>             Fix For: 4.0
>
>         Attachments: shard-roles.patch
>
>
> Need state for shards that indicate they are recovering, active/enabled, or 
> disabled.

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