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Figure 1. The structure of an iterations. 

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The operator wrapper needs to simulates the context that an operator executes. Specially, for operators with single-round lifecycle in bounded iteration, we would need to isolate the states used for each round and cleanup the corresponding state after the round end.

Examples

This sections shows how general used ML algorithms are implemented with the iteration API

Implementation Plan

Logically all the iteration types would support both BATCH and STREAM execution mode. However, according to the algorithms' requirements, we would implement 

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