Computational Resource Consumption with SpoRT

1. Computational Resource Consumption with SpoRT Assessment of Computational Resource usage within the SPoRT program October 2007

2. Current Activities • Activities in this assessment are only those deemed to be computationally “expensive” • The definition of expensive is generally tasks that are multiprocessor tasks and run for a notable amount of time (generally greater than an hour) 1 Since ADAS is single processor, only fcst is included in this discussion

3. Quantifying Current Activities • Basic measures needed to determine a quantified comparison of computational resource consumption • the number of processors • the time per individual task • the number of experiments • The product of these measures gives a measure of the computational hours necessary for each “step” within the experimental design • Processor efficiency is not considered

4. Quantifying Current Activities

5. Quantifying Current Activities • The previous chart shows the amount of resources per experimental step • However, each study has more steps per case day • For example, the AIRS profile study runs once a case day • The NSSL forecasts are initialized once a day • The AIRS Radiance study performs 8 assimilation cycles and 4 forecasts a day • Thus, computational hours per case day are considered by taking the product of the steps per day and the computational hours per step

6. Quantifying Current Activities 1 The Radiance Assimilation study is the total of the DA cycle and the spawned forecasts

7. Disk Space Requirement Estimation 1 DA+FCST 2 “Total”