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From "Andy Laird (JIRA)" <>
Subject [jira] [Commented] (SOLR-2592) Pluggable shard lookup mechanism for SolrCloud
Date Mon, 17 Sep 2012 19:56:07 GMT


Andy Laird commented on SOLR-2592:

Michael, I've been using your patch for a few months now (since it's the only way we can get
field collapse counts to work properly for distributed queries) and it looks like your latest
thoughts are similar to the discussions earlier (~ June 23)?  If I understand correctly, all
we'll need to do is add the shardKey to our schema and we no longer will need the composite
uniqueKey and corresponding ShardKeyParsers?  We'll still need to deal with the situation
where our document's shardKey field changes (to relocate the doc to a different shard, etc.)
but I see no way around that.  Regarding realtime get, are you aware of [SOLR-3133|]?
 Just wondering if the use of the shard.key.value parameter will help or hinder that issue
(there's not a lot of detail about why RT get doesn't work in distributed mode and I haven't
had a chance to look myself).
> Pluggable shard lookup mechanism for SolrCloud
> ----------------------------------------------
>                 Key: SOLR-2592
>                 URL:
>             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,
> 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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