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https://issues.apache.org/jira/browse/SOLR-5473?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14050680#comment-14050680
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Mark Miller commented on SOLR-5473:
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I'll also reiterate: Splitting the clusterstate.json is a large, nice, self
container issue. If we could do that, I think it would be a lot easier to see
how it *should* be done in a nice way, where it's easy to deprecate and remove
an impl later.
I think because you are trying to tie that issue into this collections scaling
issue, you are okay saying that, oh it just has to be ugly and hackey, because
it's this whole pile of issues we are solving. I don't think it does have to be
ugly or hackey and I think if we let that stay in trunk, it will haunt us like
a lot of other code we have sometimes let in too easily.
Finally, splitting the clusterstate by collection has not been a contentious
issue. Some of the other things you are doing around watchers and caching is
more contentious. We don't have full agreement on them, we never have, and it
really feels like they are coming in as extra pork on a bill with the JIRA
title "make one state.json per collection".
> Make one state.json per collection
> ----------------------------------
>
> Key: SOLR-5473
> URL: https://issues.apache.org/jira/browse/SOLR-5473
> Project: Solr
> Issue Type: Sub-task
> Components: SolrCloud
> Reporter: Noble Paul
> Assignee: Noble Paul
> Fix For: 5.0
>
> Attachments: SOLR-5473-74 .patch, SOLR-5473-74.patch,
> SOLR-5473-74.patch, SOLR-5473-74.patch, SOLR-5473-74.patch,
> SOLR-5473-74.patch, SOLR-5473-74.patch, SOLR-5473-74.patch,
> SOLR-5473-74.patch, SOLR-5473-74.patch, SOLR-5473-74.patch,
> SOLR-5473-74.patch, SOLR-5473-74.patch, SOLR-5473-74.patch,
> SOLR-5473-74.patch, SOLR-5473-74.patch, SOLR-5473-74.patch,
> SOLR-5473-74.patch, SOLR-5473-74.patch, SOLR-5473-74.patch,
> SOLR-5473-74.patch, SOLR-5473-74.patch, SOLR-5473-74.patch,
> SOLR-5473-74.patch, SOLR-5473-74.patch, SOLR-5473-74.patch,
> SOLR-5473-74.patch, SOLR-5473-74.patch, SOLR-5473-74.patch,
> SOLR-5473-74.patch, SOLR-5473-74.patch, SOLR-5473-configname-fix.patch,
> SOLR-5473.patch, SOLR-5473.patch, SOLR-5473.patch, SOLR-5473.patch,
> SOLR-5473.patch, SOLR-5473.patch, SOLR-5473.patch, SOLR-5473.patch,
> SOLR-5473.patch, SOLR-5473.patch, SOLR-5473.patch, SOLR-5473.patch,
> SOLR-5473.patch, SOLR-5473.patch, SOLR-5473.patch, SOLR-5473.patch,
> SOLR-5473.patch, SOLR-5473.patch, SOLR-5473_undo.patch,
> ec2-23-20-119-52_solr.log, ec2-50-16-38-73_solr.log
>
>
> As defined in the parent issue, store the states of each collection under
> /collections/collectionname/state.json node
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