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https://issues.apache.org/jira/browse/SOLR-2358?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13123198#comment-13123198
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Yonik Seeley commented on SOLR-2358:
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As far as locking vs leader, I think maybe both can make sense.
Some things are logically more node specific and a lock can make more sense
there (so that a node can modify it's own state).
Also, something like a command to create a new collection might be easier with
a cluster lock. The node that received the command can just do it, rather than
introducing logic to forward the command to the cluster leader (or put the
request in a ZK queue or something, to be pulled by someone, which still needs
coordination to make sure only one node is trying to do it).
On the other hand, cluster overseer code that might want to watch the cluster
and change the configuration... a single cluster leader makes sense there (and
they may end up also grabbing some sort of lock to avoid conflicts with what
other nodes may do).
> Distributing Indexing
> ---------------------
>
> Key: SOLR-2358
> URL: https://issues.apache.org/jira/browse/SOLR-2358
> Project: Solr
> Issue Type: New Feature
> Components: SolrCloud, update
> Reporter: William Mayor
> Priority: Minor
> Fix For: 4.0
>
> Attachments: SOLR-2358.patch
>
>
> The first steps towards creating distributed indexing functionality in Solr
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