Help on migration from 1.5 to 6.5

Elastic Stack Elasticsearch
1

Hello

I'm trying to upgrade an existing elasticSearch on version 1.5.2 to version 6.5.4.

I was wondering if there's any recommendation on converting existing data. I'm able to perform a reload for some of the indices but others I'm afraid it's not possible.

2

Direct upgrade from such an old version is not supported, so you will have to reindex all indexes, update mappings and change queries. I a lot of things changed since 1.5. We are keeping track of all breaking changes on these pages:

https://www.elastic.co/guide/en/elasticsearch/reference/2.0/breaking-changes-2.0.html
https://www.elastic.co/guide/en/elasticsearch/reference/5.0/breaking-changes-5.0.html
https://www.elastic.co/guide/en/elasticsearch/reference/6.5/breaking-changes.html

So you will probably have to study these pages and check what applies to your situation.

3

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