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OpenDC works with two types of traces that describe the servers that need to be run. Both traces have to be provided as
parquet files.
#### Task
The meta trace provides an overview of the servers:
| Metric | Datatype | Unit | Summary |
|-----------------|----------|----------|--------------------------------------------------|
| id | string | | The id of the server |
| submission_time | int64 | datetime | The submission time of the server |
| duration | int64 | datetime | The finish time of the submission |
| cpu_count | int32 | count | The number of CPUs required to run this server |
| cpu_capacity | float64 | MHz | The amount of CPU required to run this server |
| mem_capacity | int64 | MB | The amount of memory required to run this server |
#### Fragment
The Fragment file provides information about the computational demand of each server over time:
| Metric | Datatype | Unit | Summary |
|-----------|------------|---------------|---------------------------------------------|
| id | string | | The id of the task |
| duration | int64 | milli seconds | The duration since the last sample |
| cpu_count | int32 | count | The number of cpus required |
| cpu_usage | float64 | MHz | The amount of computational power required. |
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