[R] Integrating R into a web application

[benoitg]

Hello everyone,

I am developing a web application and I would like to perform two kind of
statistical/modeling operations.

(1) Batch analysis  from data stored in the backend of my app (HBase
cluster). Typically, this operation needs to be performed on regular basis,
say every night. The size of the data may exceed what can be stored in local
memory, so this might need the invocation of some package supporting
parallel computing. 
(2) On the fly R execution triggered by a user request in the front-end.
Typical use case include forecasting of small time series. Users may place
requests in the same time so there should be some support for concurrency.
The performance is of paramount importance because the user can't wait
indefinitely for the response to come.

My question is : *what would be the best combination of technologies/CRAN
package to address those two problems ?*
My idea for the moment is : 
- Using Rserver in combination with a Ruby client. Alternatively, I am
thinking about writing myself the server in Java and using existing R/Java
bindings.
- Using RHadoop to handle jobs on big datasets.

I saw RevoDeployR is a great tool but is not open source, isn't it ?

Thank you for your help






 





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