Add ElasticIterDatasetIterator to handle scaling up and down between checkpoints.#1218
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…n checkpoints. * Allows users to keep their pipelines elastic and restore from a checkpoint with variable amount of hosts Limitations * Does not guarantee determinism between scaling * The limit of parallelism is the number of shards * Currently doesn't support multiprocessing PiperOrigin-RevId: 934647127
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Add
ElasticIterDatasetIteratorto handle scaling up and down between checkpoints.Limitations