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https://issues.apache.org/jira/browse/SOLR-2593?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13207452#comment-13207452
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Andrzej Bialecki commented on SOLR-2593:
-----------------------------------------
Jason, see LUCENE-2632 for a possible way to implement this at the Lucene
level. Splitting into arbitrary parts so far required multiple passes over
input data, using the approach of tee/filter codecs it's possible to do this in
one pass over the input data.
> A new core admin action 'split' for splitting index
> ---------------------------------------------------
>
> Key: SOLR-2593
> URL: https://issues.apache.org/jira/browse/SOLR-2593
> Project: Solr
> Issue Type: New Feature
> Reporter: Noble Paul
> Fix For: 4.0
>
>
> If an index is too large/hot it would be desirable to split it out to another
> core .
> This core may eventually be replicated out to another host.
> There can be to be multiple strategies
> * random split of x or x%
> * fq="user:johndoe"
> example :
> action=split&split=20percent&newcore=my_new_index
> or
> action=split&fq=user:johndoe&newcore=john_doe_index
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