I will try to answer these questions 1) We can using ignite as cache storage and preparing data for processing on dl4j? - yes you can, it's main case, to load data to ignite caches correctly 2) Job on spark can spawn hirarchy job for accelerate execution. - Ignite can compute piece pf code in parallel and etc, but you need to implement correct infrastrucure about code tasks spreading and so on over ignite. Look at our TF integration and distributing training
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