After launching the mini cluster its view was as follows:<\/p>\n
As usual we need some data for tests and I decided to use the example data provided with Solr. In order to index them I’ve run the following command in the exampledocs <\/em>directory:\n<\/p>\n The number of indexed documents were checked with the following command:\n<\/p>\n The response returned by Solr was as follows:\n<\/p>\n As you can see we’ve got 32 documents in our collection.<\/p>\n So now let’s try to divide the single shard our collection is built of. In order to do that we will use Collections API and a new – SPLITSHARD action. In its simplest form it takes two parameters – collection<\/em> which is the collection name we want to divide and the shard<\/em> which is the name of the shard we want to split. So in our case, the command that will split the shard looks like this:\n<\/p>\n If everything run without a problem, after a few seconds we will get response form Solr that indicates the end of the process. The response will look more or less like this:\n<\/p>\n After the split our cluster view will look like this:<\/p>\n Statistics for shard with the name of Shard1_1<\/em> are as follows:<\/p>\n![\"after_start\"](\"http:\/\/solr.pl\/wp-content\/uploads\/2013\/05\/after_start1.png\")
<\/a><\/p>\nTest data<\/h3>\n
java -jar post.jar *.xml<\/pre>\n
curl 'http:\/\/localhost:8983\/solr\/collection1\/select?q=*:*&rows=0'<\/pre>\n
<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<response>\n<lst name=\"responseHeader\">\n <int name=\"status\">0<\/int>\n <int name=\"QTime\">5<\/int>\n <lst name=\"params\">\n <str name=\"q\">*:*<\/str>\n <str name=\"rows\">0<\/str>\n <\/lst>\n<\/lst>\n<result name=\"response\" numFound=\"32\" start=\"0\">\n<\/result>\n<\/response><\/pre>\n
Shard split<\/h3>\n
curl 'http:\/\/localhost:8983\/solr\/admin\/collections?action=SPLITSHARD&collection=collection1&shard=shard1'<\/pre>\n
<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<response>\n<lst name=\"responseHeader\">\n <int name=\"status\">0<\/int>\n <int name=\"QTime\">9220<\/int>\n<\/lst>\n<lst name=\"success\">\n <lst>\n <lst name=\"responseHeader\">\n <int name=\"status\">0<\/int>\n <int name=\"QTime\">6963<\/int>\n <\/lst>\n <str name=\"core\">collection1_shard1_1_replica1<\/str>\n <str name=\"saved\">\/home\/solr\/4.3\/solr\/solr.xml<\/str>\n <\/lst>\n <lst>\n <lst name=\"responseHeader\">\n <int name=\"status\">0<\/int>\n <int name=\"QTime\">6977<\/int>\n <\/lst>\n <str name=\"core\">collection1_shard1_0_replica1<\/str>\n <str name=\"saved\">\/home\/solr\/4.3\/solr\/solr.xml<\/str>\n <\/lst>\n <lst>\n <lst name=\"responseHeader\">\n <int name=\"status\">0<\/int>\n <int name=\"QTime\">9005<\/int>\n <\/lst>\n <\/lst>\n <lst>\n <lst name=\"responseHeader\">\n <int name=\"status\">0<\/int>\n <int name=\"QTime\">9006<\/int>\n <\/lst>\n <\/lst>\n <lst>\n <lst name=\"responseHeader\">\n <int name=\"status\">0<\/int>\n <int name=\"QTime\">103<\/int>\n <\/lst>\n <\/lst>\n <lst>\n <lst name=\"responseHeader\">\n <int name=\"status\">0<\/int>\n <int name=\"QTime\">1<\/int>\n <\/lst>\n <str name=\"core\">collection1_shard1_1_replica1<\/str>\n <str name=\"status\">EMPTY_BUFFER<\/str>\n <\/lst>\n <lst>\n <lst name=\"responseHeader\">\n <int name=\"status\">0<\/int>\n <int name=\"QTime\">1<\/int>\n <\/lst>\n <str name=\"core\">collection1_shard1_0_replica1<\/str>\n <str name=\"status\">EMPTY_BUFFER<\/str>\n <\/lst>\n<\/lst>\n<\/response><\/pre>\n
Cluster after the split<\/h3>\n
<\/a>As we can see we have two new shards. In theory each of the new shards should contain a portion of documents from the original shard1 <\/em>– some of the documents should be placed in shard1_1 <\/em>and some in shard1_0<\/em>. Again using Solr administration panel we can check each of the cores (which are the actual shards):<\/p>\nShard1_1<\/h4>\n