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https://issues.apache.org/jira/browse/SOLR-5353?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Shalin Shekhar Mangar updated SOLR-5353:
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Attachment: SOLR-5353.patch
Changes:
# CoreAdmin SPLIT accepts a split.key parameter
# SolrIndexSplitter matches the split.key to the route key read from the id
field
# Added a test which uses two split keys that have the same hash in murmur2
The way we extract the route key from the id field is a hack -- this
functionality should ideally be inside CompositeIdRouter. I'll open an issue.
> Enhance CoreAdmin api to split a route key's documents from an index
> --------------------------------------------------------------------
>
> Key: SOLR-5353
> URL: https://issues.apache.org/jira/browse/SOLR-5353
> Project: Solr
> Issue Type: Sub-task
> Components: SolrCloud
> Reporter: Shalin Shekhar Mangar
> Assignee: Shalin Shekhar Mangar
> Priority: Minor
> Fix For: 4.6, 5.0
>
> Attachments: SOLR-5353.patch
>
>
> Allow a split key to be passed in to CoreAdmin SPLIT action so that we can
> split only a particular route key's documents out of the index.
> e.g. consider an index containing documents belonging to two route keys with
> hash ranges A!=[12,15] and B!=[13,17]. We want to split all documents having
> route key 'A!' while leaving behind any documents having route key 'B!' even
> though some documents with 'B!' fall into the hash range of 'A!'
> This is different from what was achieved in SOLR-5338 because that issue
> splits all documents belonging to the hash range of a given route key. Since
> multiple keys can have overlapping hash range and we were splitting into the
> same collection, we had no choice but to move all documents belonging to the
> hash range into the new shard.
> In this particular issue, we are trying to migrate documents to a different
> collection and therefore we can leave documents having other route keys
> behind.
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