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OpenDC requires three files to run an experiment. First is the topology of the data center that will be simulated.
Second, is a meta trace providing an overview of the servers that need to be executed. Third is the trace describing the
computational demand of each job over time.
### Topology
The topology of a datacenter is described by a csv file. Each row in the csv is a cluster
of in the data center. Below is an example of a topology file consisting of three clusters:
| ClusterID | ClusterName | Cores | Speed | Memory | numberOfHosts | memoryCapacityPerHost | coreCountPerHost |
|-----------|-------------|-------|-------|--------|---------------|-----------------------|------------------|
| A01 | A01 | 32 | 3.2 | 2048 | 1 | 256 | 32 |
| B01 | B01 | 48 | 2.93 | 1256 | 6 | 64 | 8 |
| C01 | C01 | 32 | 3.2 | 2048 | 2 | 128 | 16 |
### Traces
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.
#### Meta
The meta trace provides an overview of the servers:
| Metric | Datatype | Unit | Summary |
|--------------|------------|----------|--------------------------------------------------|
| id | string | | The id of the server |
| start_time | datetime64 | datetime | The submission time of the server |
| stop_time | datetime64 | 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 |
#### Trace
The Trace file provides information about the computational demand of each server over time:
| Metric | Datatype | Unit | Summary |
|-----------|------------|---------------|---------------------------------------------|
| id | string | | The id of the server |
| timestamp | datetime64 | datetime | The timestamp of the sample |
| 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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