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From "Yonik Seeley (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-3755) shard splitting
Date Mon, 03 Sep 2012 16:43:08 GMT

    [ https://issues.apache.org/jira/browse/SOLR-3755?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13447347#comment-13447347
] 

Yonik Seeley commented on SOLR-3755:
------------------------------------

Just committed some more progress.

http://svn.apache.org/viewvc?rev=1380287&view=rev

I started up a ZK cluster with one shard, one node.
curl "http://localhost:8983/solr/admin/cores?core=collection1&action=SPLIT"

The cloud state after looks like
{code}
{"collection1":{
    "shard1":{"Rogue:8983_solr_collection1":{
        "shard":"shard1",
        "roles":null,
        "leader":"true",
        "state":"active",
        "core":"collection1",
        "collection":"collection1",
        "node_name":"Rogue:8983_solr",
        "base_url":"http://Rogue:8983/solr"}},
    "shard1_0":{"Rogue:8983_solr_collection1_0":{
        "shard":"shard1_0",
        "leader":"true",
        "roles":null,
        "state":"active",
        "core":"collection1_0",
        "collection":"collection1",
        "node_name":"Rogue:8983_solr",
        "base_url":"http://Rogue:8983/solr"}},
    "shard1_1":{"Rogue:8983_solr_collection1_1":{
        "shard":"shard1_1",
        "roles":null,
        "leader":"true",
        "state":"active",
        "core":"collection1_1",
        "collection":"collection1",
        "node_name":"Rogue:8983_solr",
        "base_url":"http://Rogue:8983/solr"}}}}
{code}

The original core had 32 docs.  After I did a manual commit on both of the new cores, the
first showed 14 docs and the second 18.

                
> 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.patch, SOLR-3755.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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