Workloads define what tasks in the simulation, when they were submitted, and their computational requirements.
Workload are defined using two files: 

- **[Tasks](#tasks)**: The Tasks file contains the metadata of the tasks
- **[Fragments](#fragments)**: The Fragments file contains the computational demand of each task over time

Both files are provided using the parquet format. 

#### Tasks
The Tasks file provides an overview of the tasks:

| Metric          | Required? | Datatype | Unit                         | Summary                                                |
|-----------------|-----------|----------|------------------------------|--------------------------------------------------------|
| id              | Yes       | string   |                              | The id of the server                                   |
| submission_time | Yes       | int64    | datetime                     | The submission time of the server                      |
| nature          | No        | string   | [deferrable, non-deferrable] | Defines if a task can be delayed                       |
| deadline        | No        | string   | datetime                     | The latest the scheduling of a task can be delayed to. |
| duration        | Yes       | int64    | datetime                     | The finish time of the submission                      |
| cpu_count       | Yes       | int32    | count                        | The number of CPUs required to run this task           |
| cpu_capacity    | Yes       | float64  | MHz                          | The amount of CPU required to run this task            |
| mem_capacity    | Yes       | int64    | MB                           | The amount of memory required to run this task         |

#### Fragments
The Fragments file provides information about the computational demand of each task over time:

| Metric    | Required? | Datatype | Unit          | Summary                                     |
|-----------|-----------|----------|---------------|---------------------------------------------|
| id        | Yes       | string   |               | The id of the task                          |
| duration  | Yes       | int64    | milli seconds | The duration since the last sample          |
| cpu_count | Yes       | int32    | count         | The number of cpus required                 |
| cpu_usage | Yes       | float64  | MHz           | The amount of computational power required. |