# Wavelet: Efficient DNN Training with Tick-Tock Scheduling

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1. All-reduce 
2. Parameter server 

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* Why?
  * Cluster-level
  * Might be more fragmentation 
  * Not something about single task utilization 

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* Not using all resources all the time 

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Gandiva:

* cluster-level
* But does not improve a single job's performance 
* Single job also takes the same time 

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* Increase inter-batch parallelism 

Gandiva:

* Multi-jobs and single jobs 

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Pipedream: minimizing the communication there 

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Version of the model that is read? 

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### Slides 


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