Multi-Index Operations and Aliases

  • ElasticSearch is not a traditional database, searches can be executed acorss indices with no known performance implications
  • Entire cluster search:
    curl 'localhost:9200/_search?q=id:1'
    
  • Multiple indices search:
    curl 'localhost:9200/index1,index2/_search?q=id:1'
    
  • Wildcard search:
    curl 'localhost:9200/index*/_search?q=id:*'
    
  • Index alias - create an alias for index or for group of indexes:
    curl -XPOST 'http://localhost:9200/_aliases' -H 'content-type: application/json' -d '
    {
      "actions" : [
          { "add" : { "index" : "test1", "alias" : "alias1" } },
          { "add" : { "index" : "test2", "alias" : "alias1" } }
      ]
    }'
    
  • Why bother creating aliases? Logical data partitioning, archiving by index, access control...

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