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https://issues.apache.org/jira/browse/SOLR-5308?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Shalin Shekhar Mangar updated SOLR-5308:
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Attachment: SOLR-5308.patch
This patch implements the MIGRATE Collection API
# Identifies the source and target shards for the given split.key. The for each
pair of (source,target)
## Calculates common hash range by intersecting hash range of source shard,
target shard and split.key's hash range
## Creates a temporary collection with just one replica on the source shard
leader node
## Splits the source shard using the common hash range and split.key into the
temporary collection
## Creates a replica of the temporary collection on the target shard leader's
node
## Waits for it to become active
## Merges the replica's index into the target shard leader's index
This is a rough cut to show where we're going with this. There are plenty of
nocommits and todos. I still need to figure out how the request forwarding
should work and if/how we can make the replica recovery asynchronous as we did
for the split shard API.
> Split all documents of a route key into another collection
> ----------------------------------------------------------
>
> Key: SOLR-5308
> URL: https://issues.apache.org/jira/browse/SOLR-5308
> Project: Solr
> Issue Type: New Feature
> Components: SolrCloud
> Reporter: Shalin Shekhar Mangar
> Assignee: Shalin Shekhar Mangar
> Fix For: 4.6, 5.0
>
> Attachments: SOLR-5308.patch
>
>
> Enable SolrCloud users to split out a set of documents from a source
> collection into another collection.
> This will be useful in multi-tenant environments. This feature will make it
> possible to split a tenant out of a collection and put them into their own
> collection which can be scaled separately.
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