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Copy On Write (COW)
Copy On Write (COW)
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Merge On Read (MOR)

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Merge On Read (MOR)
Merge On Read (MOR)
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Hudi writing is implemented as a Spark library, which makes it easy to integrate into existing data pipelines or ingestion libraries (which we will refer to as `Hudi clients`). Hudi Clients prepare an `RDD[HoodieRecord]` that contains the data to be upserted and Hudi upsert/insert is merely a Spark DAG, that can be broken into two big pieces.

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