elasticsearch - 如何将Elasticsearch 1.x重新索引或迁移到5.x数据

Question

我有旧数据的副本，即Elasticsearch 1.x，我想在Elasticsearch 5.x中迁移或重新索引。

有哪些方法和更好的方法？

Answer 1

Elasticsearch is able to use indices created in the previous major version only. For instance, Elasticsearch 5.x can use indices created in Elasticsearch 2.x, but not those created in Elasticsearch 1.x or before.

If you are running an Elasticsearch 2.x cluster which contains indices that were created before 2.x, you will either need to delete those old indices or to reindex them before upgrading to 5.x. See Reindex in place.

If you are running an Elasticsearch 1.x cluster, you have two options:

First upgrade to Elasticsearch 2.4.x, reindex the old indices, then upgrade to 5.x.

我建议通过查看此处遵循Elasticsearch的官方指南- https://www.elastic.co/guide/en/elasticsearch/reference/current/reindex-upgrade.html#reindex-upgrade-remote，它应该会对您有所帮助。