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SOLR-2592: changes entry for doc routing 

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1433082 13f79535-47bb-0310-9956-ffa450edef68
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Yonik Seeley 2013-01-14 20:01:29 +00:00
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commit e87c7a4ae7
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solr/CHANGES.txt
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@ -210,6 +210,26 @@ New Features
* SOLR-4302: New parameter 'indexInfo' (defaults to true) in CoreAdmin STATUS
command can be used to omit index specific information (Shahar Davidson via shalin)
* SOLR-2592: Collection specific document routing. The "compositeId"
router is the default for collections with hash based routing (i.e. when
numShards=N is specified on collection creation). Documents with ids sharing
the same domain (prefix) will be routed to the same shard, allowing for
efficient querying.
Example:
The following two documents will be indexed to the same shard
since they share the same domain "customerB!".
{"id" : "customerB!doc1" [...] }
{"id" : "customerB!doc2" [...] }
At query time, one can specify a "shard.keys" parameter that lists what
shards the query should cover.
http://.../query?q=my_query&shard.keys=customerB!
Collections that do not specify numShards at collection creation time
use custom sharding and default to the "implicit" router. Document updates
received by a shard will be indexed to that shard, unless a "_shard_" parameter
or document field names a different shard.
(Michael Garski, Dan Rosher, yonik)
Optimizations
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