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From "Noble Paul (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-5017) Allow sharding based on the value of a field
Date Tue, 09 Jul 2013 08:09:48 GMT

    [ https://issues.apache.org/jira/browse/SOLR-5017?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13703039#comment-13703039
] 

Noble Paul commented on SOLR-5017:
----------------------------------

bq.I could see by default, the compositeId router also paying attention to the _shard_ parameter

the _shard_ parameter is the actual name of the shard. In case of compositeId router , the
client is agnostic of the shard name and all that it cares about is shard.keys. What I mean
to say is, the name _shard_ can be a bit confusing

As of now we don't have a plan on how to do shard splitting for 'implicit' router. Let's keep
it as  TBD

In case of compositeId router , I would like to read the part before the (!) to be read from
the 'shardField'. The semantics will be exactly same as it is now. Reading the value from
a request parameter would mean we will need to persist it along with the document in some
field . 
                
> 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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