'Update data in elasticsearch from csv
I have a bunch of indices A,B,C,D containing large amounts of data per each let's say 50 million records per index and the record contains data as follows:
user: amine, age: 22, state: Michigan
and I want to create a new index E and bulk new data into it from a csv file. What I hope for is that if a user from E already exists in one of the other indices but with different information for example:
user: amine, age: 25, state: California
I want the user amine to be updated in all other indices with the new data. I tried pulling all the data processing it and re-ingesting it but the process took so long.
elasticsearchSources
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