Should we continue or stop indexing during rolling upgrades of Elastic-Search?
I read in the upgrade documentation that it is optional steps to stop indexing and do flush sync. My query is if we do not stop indexing, will it take a time to rebalance entire cluster?
I have 8 data nodes and 3 master nodes with 2 TB of data. I am just confused about whether I stop indexing or not? I am upgrading from 5.6 to 6.X via a rolling upgrade.
Just wanted to know Pros and Cons.