[FEATURE] BulkRequest estimated size

[andrewparmet]

Is your feature request related to a problem?

The RestHighLevelClient had a convenience method on BulkRequest that allowed us to dynamically batch bulk operations without exceeding OpenSearch's max request size.

What solution would you like?

Is this available in the current client? If not, can it be added? I don't mind porting the old implementation if needed.

What alternatives have you considered?

I'm implementing it myself but I have to use reflection to access private fields on UpdateOperationData such as the script to get its length if I don't want to serialize it just to get its size and then have the library reserialize it again when it sends it as part of the request.

Do you have any additional context?

Nope!

[andrewparmet]

I'm also curious about the implementation itself... why is script length doubled and update operations added without the request overhead?

[peter-ponzel]

are there any news on that topic ?

[dblock]

This needs to be investigated and implemented, we welcome your contribution!