Presently AWS Elasticsearch cluster version is 6.3 and I am planning to upgrade it to 7. reindexing is also have to be done. reindexing is required to have _doc as type for the indices instead of our custom mapping types.
Below are my queries:
1. What is the end to end process of upgrading AWS ES cluster version.
2. What are the impacts post upgrade.
3. Any specific backup is required?
4. How to perform upgrade in AWS cluster?
5. Post upgrade , Do I need to carry any validtion?
6. when to do reindexing? post cluster upgrade?