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A host is a machine that can execute tasks. A host consist of the following components:
| variable | type | required? | default | description |
|-------------|:-------------------------------------------------------------|:----------|---------|--------------------------------------------------------------------------------|
| name | string | no | Host | The name of the host. This is only important for debugging and post-processing |
| count | integer | no | 1 | The amount of hosts of this type are in the cluster |
| cpuModel | [CPU](#cpu) | yes | N/A | The CPUs in the host |
| memory | [Memory](#memory) | yes | N/A | The memory used by the host |
| power model | [Power Model](/docs/documentation/Input/Topology/PowerModel) | no | Default | The power model used to determine the power draw of the host |
## CPU
| variable | type | Unit | required? | default | description |
|-----------|---------|-------|-----------|---------|--------------------------------------------------|
| modelName | string | N/A | no | unknown | The name of the CPU. |
| vendor | string | N/A | no | unknown | The vendor of the CPU |
| arch | string | N/A | no | unknown | the micro-architecture of the CPU |
| count | integer | N/A | no | 1 | The number of CPUs of this type used by the host |
| coreCount | integer | count | yes | N/A | The number of cores in the CPU |
| coreSpeed | Double | Mhz | yes | N/A | The speed of each core in Mhz |
## Memory
| variable | type | Unit | required? | default | description |
|-------------|---------|------|-----------|---------|--------------------------------------------------------------------------|
| modelName | string | N/A | no | unknown | The name of the CPU. |
| vendor | string | N/A | no | unknown | The vendor of the CPU |
| arch | string | N/A | no | unknown | the micro-architecture of the CPU |
| memorySize | integer | Byte | yes | N/A | The number of cores in the CPU |
| memorySpeed | Double | Mhz | no | -1 | The speed of each core in Mhz. PLACEHOLDER: this currently does nothing. |
## Example
```json
{
"name": "H01",
"cpu": {
"coreCount": 16,
"coreSpeed": 2100
},
"memory": {
"memorySize": 100000
},
"powerModel": {
"modelType": "sqrt",
"idlePower": 32.0,
"maxPower": 180.0
},
"count": 100
}
```
This example creates 100 hosts with 16 cores and 2.1 Ghz CPU speed, and 100 GB of memory.
The power model used is a square root model with a power of 400 W, idle power of 32 W, and max power of 180 W.
For more information on the power model, see [Power Model](/docs/documentation/Input/Topology/PowerModel).
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