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https://issues.apache.org/jira/browse/SOLR-3755?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Shalin Shekhar Mangar updated SOLR-3755:
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Attachment: SOLR-3755-combined.patch
Attached is a first iteration of the patch. It is not working yet but a lot of
the pieces required for this feature are coming together in this patch. Soon,
I'd like to split it into smaller, committable issues/patches.
This is a very rough cut but any comments/suggestions on the general approach
and/or the patch will be very helpful.
Changes:
* OverseerCollectionProcessor has a new command called splitshard which
executes the whole strategy
* Implicit support for creating new shards (by creating a core with a new shard
in "construction" state)
* "Construction" state is introduced for shards
* CoreAdmin has a new APPLYBUFFEREDUPDATES task which, as the name says,
instructs a core to apply all buffered updates
TODO:
* Create replicas for new sub-shards
* Figure out how and where to set sub-shards as active and divert traffic away
from parent shard
* Tests (both unit and ChaosMonkey based)
Right now, I'm running into a bug where the first sub-shard creation goes
through but the second sub-shard coreadmin "CREATE" command blocks in
.ShardLeaderElectionContext.waitForReplicasToComeUp(ElectionContext.java:326)
Can anyone tell me what I've overlooked?
> shard splitting
> ---------------
>
> Key: SOLR-3755
> URL: https://issues.apache.org/jira/browse/SOLR-3755
> Project: Solr
> Issue Type: New Feature
> Components: SolrCloud
> Reporter: Yonik Seeley
> Attachments: SOLR-3755-combined.patch, SOLR-3755-CoreAdmin.patch,
> SOLR-3755.patch, SOLR-3755.patch, SOLR-3755-testSplitter.patch,
> SOLR-3755-testSplitter.patch
>
>
> We can currently easily add replicas to handle increases in query volume, but
> we should also add a way to add additional shards dynamically by splitting
> existing shards.
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