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https://issues.apache.org/jira/browse/SYSTEMML-2299?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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LI Guobao updated SYSTEMML-2299:
--------------------------------
    Description: 
The objective of “paramserv” built-in function is to update an initial or 
existing model with configuration. An initial function signature would be: 

 
{code:java}
model'=paramserv(model, X, y, X_val, y_val, upd=fun1, agg=fun2, mode=BSP, 
freq=EPOCH, epochs=100, batchsize=64, k=7, scheme=disjoint_contiguous, 
hyperparam=params, checkpoint=NONE){code}
 

We are interested in providing the model (which will be a struct-like data 
structure consisting of the weights, the biases and the hyperparameters), the 
training features and labels, the validation features and labels, the batch 
update function (i.e., gradient calculation func), the update strategy (e.g. 
sync, async, hogwild!, stale-synchronous), the update frequency (e.g. epoch or 
mini-batch), the gradient aggregation function, the number of epoch, the batch 
size, the degree of parallelism as well as the checkpointing strategy (e.g. 
rollback recovery). And the function will return a trained model in struct 
format.

  was:
The objective of “paramserv” built-in function is to update an initial or 
existing model with configuration. An initial function signature would be: 

 
{code:java}
model'=paramserv(model, X, y, X_val, y_val, upd=fun1, agg=fun2, mode=BSP, 
freq=EPOCH, epochs=100, batchsize=64, k=7, hyperparam=params, 
checkpoint=NONE){code}
 

We are interested in providing the model (which will be a struct-like data 
structure consisting of the weights, the biases and the hyperparameters), the 
training features and labels, the validation features and labels, the batch 
update function (i.e., gradient calculation func), the update strategy (e.g. 
sync, async, hogwild!, stale-synchronous), the update frequency (e.g. epoch or 
mini-batch), the gradient aggregation function, the number of epoch, the batch 
size, the degree of parallelism as well as the checkpointing strategy (e.g. 
rollback recovery). And the function will return a trained model in struct 
format.


> API design of the paramserv function
> ------------------------------------
>
>                 Key: SYSTEMML-2299
>                 URL: https://issues.apache.org/jira/browse/SYSTEMML-2299
>             Project: SystemML
>          Issue Type: Sub-task
>            Reporter: LI Guobao
>            Assignee: LI Guobao
>            Priority: Major
>
> The objective of “paramserv” built-in function is to update an initial or 
> existing model with configuration. An initial function signature would be: 
>  
> {code:java}
> model'=paramserv(model, X, y, X_val, y_val, upd=fun1, agg=fun2, mode=BSP, 
> freq=EPOCH, epochs=100, batchsize=64, k=7, scheme=disjoint_contiguous, 
> hyperparam=params, checkpoint=NONE){code}
>  
> We are interested in providing the model (which will be a struct-like data 
> structure consisting of the weights, the biases and the hyperparameters), the 
> training features and labels, the validation features and labels, the batch 
> update function (i.e., gradient calculation func), the update strategy (e.g. 
> sync, async, hogwild!, stale-synchronous), the update frequency (e.g. epoch 
> or mini-batch), the gradient aggregation function, the number of epoch, the 
> batch size, the degree of parallelism as well as the checkpointing strategy 
> (e.g. rollback recovery). And the function will return a trained model in 
> struct format.



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