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https://issues.apache.org/jira/browse/SOLR-2592?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13503837#comment-13503837
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Mark Miller commented on SOLR-2592:
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bq. Now, currently the ClusterState object is created by reading
clusterstate.json, but I don't believe it reads /collections/<collection_name>,
but perhaps we should change this?
Depending on the number of collections, it may add a lot of reads on cluster
changes, but the Overseer could probably grab this from the collection node and
add it to the cluster state json file? It could perhaps even use a watcher per
collection and not read when it does not have to.
Or it could be read separately like live nodes - that gets a bit messy though.
> Custom Hashing
> --------------
>
> Key: SOLR-2592
> URL: https://issues.apache.org/jira/browse/SOLR-2592
> Project: Solr
> Issue Type: New Feature
> Components: SolrCloud
> Affects Versions: 4.0-ALPHA
> Reporter: Noble Paul
> Attachments: dbq_fix.patch, pluggable_sharding.patch,
> pluggable_sharding_V2.patch, SOLR-2592.patch, SOLR-2592_r1373086.patch,
> SOLR-2592_r1384367.patch, SOLR-2592_rev_2.patch,
> SOLR_2592_solr_4_0_0_BETA_ShardPartitioner.patch
>
>
> If the data in a cloud can be partitioned on some criteria (say range, hash,
> attribute value etc) It will be easy to narrow down the search to a smaller
> subset of shards and in effect can achieve more efficient search.
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