IMPORTANT: No additional bug fixes or documentation updates will be released for this version. For the latest information, see the current release documentation.
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Elastic Docs ›Elasticsearch Guide [6.5] ›Upgrade Elasticsearch ›Reindex before upgrading

Reindex in place

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Reindex in place

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To manually reindex your old indices with the reindex API:

  1. Create a new index and copy the mappings and settings from the old index.
  2. Set the refresh_interval to -1 and the number_of_replicas to 0 for efficient reindexing.
  3. Reindex all documents from the old index into the new index using the reindex API.
  4. Reset the refresh_interval and number_of_replicas to the values used in the old index.
  5. Wait for the index status to change to green.

  6. In a single update aliases request:

    1. Delete the old index.
    2. Add an alias with the old index name to the new index.
    3. Add any aliases that existed on the old index to the new index.

Migration assistance and upgrade tools

X-Pack 5.6 provides migration assistance and upgrade tools that simplify reindexing and upgrading to 6.x. These tools are free with the X-Pack trial and Basic licenses and you can use them to upgrade whether or not X-Pack is a regular part of your Elastic Stack. For more information, see https://www.elastic.co/guide/en/elastic-stack/6.5/upgrading-elastic-stack.html.

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