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https://issues.apache.org/jira/browse/SOLR-5017?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13704491#comment-13704491
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Noble Paul commented on SOLR-5017:
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bq.What can be accomplished by this that cannot be accomplished with the
current syntax?
* If I have a already working system where ids cannot be changed, I have no
option with the current scheme of things .
* What if I to have a clean 'id' value which is devoid of extra information?
Should I do id.substring(id.indexOf("!") everytime I use it elsewhere ?
bq.One place where it'll be easy to get wrong....
AFAIK everyone relies on the DocRouter to identify the right shard . If your
code is using that API then your code should continue to work right
> Allow sharding based on the value of a field
> --------------------------------------------
>
> Key: SOLR-5017
> URL: https://issues.apache.org/jira/browse/SOLR-5017
> Project: Solr
> Issue Type: Sub-task
> Reporter: Noble Paul
> Assignee: Noble Paul
>
> We should be able to create a collection where sharding is done based on the
> value of a given field
> collections can be created with shardField=fieldName, which will be persisted
> in DocCollection in ZK
> implicit DocRouter would look at this field instead of _shard_ field
> CompositeIdDocRouter can also use this field instead of looking at the id
> field.
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