Build index problem when batch import

Elastic Stack Elasticsearch
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If you're doing bulk imports, consider closing copies by setting index.number_of_replicas: 0.When a document is copied, the entire document content is sent to the replica node and the indexing process is repeated verbatim.This means that each copy also performs analysis, indexing, and possibly merging.

Conversely, if your index is a zero copy and you open the copy after the write is complete, the recovery process is essentially a byte to byte network transfer.This is quite efficient compared to repeating the indexing process.

Is this true?

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