# module `concrete.fhe.compilation.server`
Declaration of `Server` class.
**Global Variables**
---------------
- **DEFAULT_GLOBAL_P_ERROR**
- **DEFAULT_P_ERROR**
---
## class `Server`
Server class, which can be used to perform homomorphic computation.
### method `__init__`
```python
__init__(
client_specs: ClientSpecs,
output_dir: Optional[TemporaryDirectory],
support: LibrarySupport,
compilation_result: LibraryCompilationResult,
server_lambda: LibraryLambda,
is_simulated: bool
)
```
---
#### property clear_addition_count
Get the number of clear additions in the compiled program.
---
#### property clear_addition_count_per_parameter
Get the number of clear additions per parameter in the compiled program.
---
#### property clear_addition_count_per_tag
Get the number of clear additions per tag in the compiled program.
---
#### property clear_addition_count_per_tag_per_parameter
Get the number of clear additions per tag per parameter in the compiled program.
---
#### property clear_multiplication_count
Get the number of clear multiplications in the compiled program.
---
#### property clear_multiplication_count_per_parameter
Get the number of clear multiplications per parameter in the compiled program.
---
#### property clear_multiplication_count_per_tag
Get the number of clear multiplications per tag in the compiled program.
---
#### property clear_multiplication_count_per_tag_per_parameter
Get the number of clear multiplications per tag per parameter in the compiled program.
---
#### property complexity
Get complexity of the compiled program.
---
#### property encrypted_addition_count
Get the number of encrypted additions in the compiled program.
---
#### property encrypted_addition_count_per_parameter
Get the number of encrypted additions per parameter in the compiled program.
---
#### property encrypted_addition_count_per_tag
Get the number of encrypted additions per tag in the compiled program.
---
#### property encrypted_addition_count_per_tag_per_parameter
Get the number of encrypted additions per tag per parameter in the compiled program.
---
#### property encrypted_negation_count
Get the number of encrypted negations in the compiled program.
---
#### property encrypted_negation_count_per_parameter
Get the number of encrypted negations per parameter in the compiled program.
---
#### property encrypted_negation_count_per_tag
Get the number of encrypted negations per tag in the compiled program.
---
#### property encrypted_negation_count_per_tag_per_parameter
Get the number of encrypted negations per tag per parameter in the compiled program.
---
#### property global_p_error
Get the probability of having at least one simple TLU error during the entire execution.
---
#### property key_switch_count
Get the number of key switches in the compiled program.
---
#### property key_switch_count_per_parameter
Get the number of key switches per parameter in the compiled program.
---
#### property key_switch_count_per_tag
Get the number of key switches per tag in the compiled program.
---
#### property key_switch_count_per_tag_per_parameter
Get the number of key switches per tag per parameter in the compiled program.
---
#### property p_error
Get the probability of error for each simple TLU (on a scalar).
---
#### property packing_key_switch_count
Get the number of packing key switches in the compiled program.
---
#### property packing_key_switch_count_per_parameter
Get the number of packing key switches per parameter in the compiled program.
---
#### property packing_key_switch_count_per_tag
Get the number of packing key switches per tag in the compiled program.
---
#### property packing_key_switch_count_per_tag_per_parameter
Get the number of packing key switches per tag per parameter in the compiled program.
---
#### property programmable_bootstrap_count
Get the number of programmable bootstraps in the compiled program.
---
#### property programmable_bootstrap_count_per_parameter
Get the number of programmable bootstraps per parameter in the compiled program.
---
#### property programmable_bootstrap_count_per_tag
Get the number of programmable bootstraps per tag in the compiled program.
---
#### property programmable_bootstrap_count_per_tag_per_parameter
Get the number of programmable bootstraps per tag per parameter in the compiled program.
---
#### property size_of_bootstrap_keys
Get size of the bootstrap keys of the compiled program.
---
#### property size_of_inputs
Get size of the inputs of the compiled program.
---
#### property size_of_keyswitch_keys
Get size of the key switch keys of the compiled program.
---
#### property size_of_outputs
Get size of the outputs of the compiled program.
---
#### property size_of_secret_keys
Get size of the secret keys of the compiled program.
---
#### property statistics
Get all statistics of the compiled program.
---
### method `cleanup`
```python
cleanup()
```
Cleanup the temporary library output directory.
---
### method `create`
```python
create(
mlir: Union[str, Module],
configuration: Configuration,
is_simulated: bool = False,
compilation_context: Optional[CompilationContext] = None
) → Server
```
Create a server using MLIR and output sign information.
**Args:**
mlir (MlirModule): mlir to compile
is_simulated (bool, default = False): whether to compile in simulation mode or not
configuration (Optional[Configuration]): configuration to use
compilation_context (CompilationContext): context to use for the Compiler
---
### method `load`
```python
load(path: Union[str, Path]) → Server
```
Load the server from the given path in zip format.
**Args:**
path (Union[str, Path]): path to load the server from
**Returns:**
Server: server loaded from the filesystem
---
### method `run`
```python
run(
*args: Optional[Value, Tuple[Optional[Value], ]],
evaluation_keys: Optional[EvaluationKeys] = None
) → Union[Value, Tuple[Value, ]]
```
Evaluate.
**Args:**
*args (Optional[Union[Value, Tuple[Optional[Value], ...]]]): argument(s) for evaluation
evaluation_keys (Optional[EvaluationKeys], default = None): evaluation keys required for fhe execution
**Returns:**
Union[Value, Tuple[Value, ...]]: result(s) of evaluation
---
### method `save`
```python
save(path: Union[str, Path], via_mlir: bool = False)
```
Save the server into the given path in zip format.
**Args:**
path (Union[str, Path]): path to save the server
via_mlir (bool, default = False): export using the MLIR code of the program, this will make the export cross-platform