How to use bulk api for reindexing

Hi, I am currently using the reindex api like this:
POST _reindex?scroll=60m&timeout=60m


"index": "source_index"


"dest": {
"index": "destination_index"
. Is this bulk indexing? If not How can I use Bulk api inorder to do similar task which would be faster?

Heya @zatom,

Yes _reindex is utilizing bulk indexing when writing the documents.

See documentation quote

Since the batch is issued as a single _bulk request, large batch sizes will cause Elasticsearch to create many requests and then wait for a while before starting the next set. This is "bursty" instead of "smooth". The default value is -1 .

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