I'm looking for suggestion for a solutions in R that will allow me to forecast up to 50,000 time series each week.
My data consists of sales data for up to 50,000 products on a weekly frequency with approx. 2 years of weekly data for each time series i.e. 104 points per time series.
I'm researching solutions and I'm aware of approaches in Tidymodels using workflowsets with multiple recipes and models. These approaches seem to be more suited to small numbers of time series (please correct me if this is untrue). Here is an approach using tidymodels with multiple models and multiple timeseries. Assuming I apply this approach to my data using a large compute resource (high compute power and RAM), how will this solution fail?
Matt Dancho has developed modeltime with nested dataframes on Spark but upon further research it doesn't appear that hyper-parameter tuning is possible with dataframes on Spark using Sparklyr.
Are there other scalable solutions that you could suggest for scalable time series forecasting in R?