I'd like to know if there's a process when we want to upgrade elasticsearch's version, and that if possible without knowing the version, just generally.
Is it better to create a new cluster and give to data.path the value of the old data and then use the migrate API ?
Or maybe create a new cluster and make a snapshot of the old data and a restore in the new cluster ?
Or maybe something else ????
Thanks a lot.
P.S : If there's really a need, my old cluster use Elastic 2.1.1 and my new 2.3.3. I know v5 is here...