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https://issues.apache.org/jira/browse/SOLR-2592?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13456738#comment-13456738
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Noble Paul commented on SOLR-2592:
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Think about an app whose schema and key are already defined and they are moving
to cloud, this will force them to change their keys. Then we have a completely
arbitrary way of how to parse the key depending on how it is encoded. For the
clients , it is equally easy or hard to pass an extra param than constructing a
key that contains an extra parameter. Most likely the key is the only thing
that they use in the app (say front end) . I think, it is ugly and inconvenient
to dictate how the key should look like
bq.(or maybe even more than one)
We can enforce that only one field can be used as a "shard.key"
> Pluggable shard lookup mechanism for SolrCloud
> ----------------------------------------------
>
> 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
> Assignee: Mark Miller
> 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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