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## Chapter 36. Batch Insertion

Neo4j has a batch insertion facility intended for initial imports, which bypasses transactions and other checks in favor of performance. This is useful when you have a big dataset that needs to be loaded once.

Batch insertion is included in the neo4j-kernel component, which is part of all Neo4j distributions and editions.

Be aware of the following points when using batch insertion:

- The intended use is for initial import of data.
- Batch insertion is not thread safe.
- Batch insertion is non-transactional.
- Batch insertion will re-populate all existing indexes and indexes created during batch insertion on shutdown.
- Unless `shutdown` is successfully invoked at the end of the import, the database files will be corrupt.

| Warning
Always perform batch insertion in a single thread (or use synchronization to make only one thread at a time access the batch inserter) and invoke `shutdown` when finished.

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