Index Aliases and Zero Downtime | Elasticsearch: The Definitive Guide [2.x] | ElasticThe problem with the reindexing process described previously is that you need to update your application to use the new index name. Index aliases to the rescue! An index alias is like a shortcut or symbolic link, which can point to one or more indices, and can be used in any API that expects an index name. Aliases give us an enormous amount of flexibility. They allow us to do the following: Switch
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The Great Mapping Refactoring
