# Presentation: 702447

## Assessment of Computational Resource usage within the SPoRT program 
October 2007

- Assessment of Computational Resource usage within the SPoRT program
- October 2007

## 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)

| Task | User | location | platform | Notes |
| --- | --- | --- | --- | --- |
| AIRS Radiance DA Cycle | McCarty | NOAA/NCEP/EMC | IBM Haze |  |
| AIRS Radiance Fcst Cycle | McCarty | NOAA/NCEP/EMC | IBM Haze |  |
| AIRS Radiance Assimilation Study | McCarty | NOAA/NCEP/EMC | IBM Haze | DA+Fcst |
| NSSL 4km WRF Fcst | Dembek | NOAA/NSSL | SGI Altix 4700 |  |
| AIRS Profile Assimilation | Chou/Zavodsky | SPoRT | LC2 | Single Processor ADAS1 |
| WRF/LIS study | Case | GSFC | NCCS Discover |  |

- 1 Since ADAS is single processor, only fcst is included in this discussion

## Basic measures needed to determine a quantified comparison of computational resource consumption 

- 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

## Slide 4

| Task | n. proc | proc type | task time (hr) | experiments | Computing Hours per step |
| --- | --- | --- | --- | --- | --- |
| AIRS Radiance DA Cycle | 48 | IBM Power5 | 1 | 2 | 96 |
| AIRS Radiance Fcst Cycle | 48 | IBM Power5 | 3 | 2 | 288 |
| NSSL 4km WRF Fcst | 61 | Intel Itanium 9000  | 7.5 | 1 | 457.5 |
| AIRS Profile Assimilation | 30 | Intel Xeon CPU 3.20GHz | 2.5 | 2 | 150 |
| WRF/LIS study | 100 | Intel Xeon CPU 3.20GHz | 1.2 | 1 | 120 |

## The previous chart shows the amount of resources per experimental step 

- 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

## 1 The Radiance Assimilation study is the total of the DA cycle and the spawned forecasts

| Task | Computing Hours (n. ex * n. proc * task time) per step | Steps per case day | computing hours  per case day |
| --- | --- | --- | --- |
| AIRS Radiance DA Cycle | 96 | 8 | 768 |
| AIRS Radiance Fcst Cycle | 288 | 4 | 1152 |
| AIRS Radiance Assimilation Study |  |  | 19201 |
| NSSL 4km WRF Fcst | 457.5 | 1 | 457.5 |
| AIRS Profile Assimilation | 150 | 1 | 150 |
| WRF/LIS study | 120 | 1 | 120 |

- 1 The Radiance Assimilation study is the total of the DA cycle and the spawned forecasts

## 1 DA+FCST     	2 “Total”

| Task | Disk Space Usage (GB) per experiment | experiments | Disk Space Per step | Steps per case day | Disk Space per case day (GB) |
| --- | --- | --- | --- | --- | --- |
| AIRS Radiance DA Cycle | 6.6 | 2 | 13.2 | 8 | 105.6 |
| AIRS Radiance Fcst Cycle | 63 | 2 | 126 | 4 | 504 |
| AIRS Radiance Assimilation Study |  |  |  |  | 609.61 |
| NSSL 4km WRF Fcst | 60 | 1 | 60 | 1 | 60 |
| AIRS Profile Assimilation | 11.3 | 2 | 22.6 | 1 | 22.6 |
| WRF/LIS study |  |  |  |  | 5002 |

- 1 DA+FCST     	2 “Total”