# general Section

This section configures **general model settings**, including **time steps**, **mesh files**, **solver types**, and **parallelization options**.

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 | **Parameter** | **Description** |
 |---------------|----------------|
 | `rootname` | Root name for grid files. |
 | `time_step` | Main time step for the model (default: `NONE`, in seconds). |
 | `sub_time_step` | Sub-time step for the model (default: `$TimeStep/3.0`, in seconds). |
 | `nSubCycles` | Number of sub-cycles (default: `1`). |
 | `time_origine` | Time origin for the simulation (default: `1950-01-01 00:00:00`). |
 | `mesh_format` | Format of the mesh file (`nei`, `nod`, `nc`). |
 | `mesh_type` | Type of mesh (`LINEAR`, `TRIANGULAR`, `QUADRANGULAR`, `MIXED`, `STRUCTURED`). |
 | `mesh_meta` | Input-output variable names for structured mesh. |
 | `mesh_file` | Alternative path for grid file (only for `mesh_format=nei`). |
 | `mesh_proj4` | PROJ4 parameters for Cartesian grids. |
 | `bel_file` | BEL file for mesh. |
 | `topo_file` | Bathymetry file. |
 | `slope_file` | Bathymetry gradient file. |
 | `zmin_file` | Minimum elevation file. |
 | `relative_minimum_depth` | Minimum depth relative to minimum elevation (default: `5.0 m`). |
 | `minimum_depth` | Overall minimum depth in model bathymetry (default: `10.0 m`). |
 | `run_duration` | Run duration for the simulation (default: `48.0 hours`). |
 | `spin_up` | Spin-up duration for cold start (default: `48.0 hours`). |
 | `spin_up_mode` | Mode for spin-up (`LINEAR`, `COSINE`). |
 | `cold_start_ssh` | Cold start sea surface height filename. |
 | `restart_file` | Restart file or flag for cold start (`COLD-START`, `FILE`). |
 | `restart_format` | Format of restart file (`NETCDF`, `CLX`). |
 | `ContinuationFlag` | Flag to enable/disable rolling continuation files (`ENABLED`, `DISABLED`). |
 | `continuation_file` | Root name for restart files (default: `tugo_restart`). |
 | `continuation_format` | Format for restart files (`NETCDF`, `CLX`). |
 | `continuation_interval` | Interval for restart files (default: `10800.0 s`). |
 | `automatic_interval` | Automatic interval for restart files (`HOURLY`, `DAILY`, `WEEKLY`, `MONTHLY`, `YEARLY`). |
 | `output_path` | Default path for model outputs (default: `.`). |
 | `solver_type` | Solver type for implicit linear systems (`DOMESTIC`, `LAPACK`, `SUNPERF`, `UMFPACK`, `PETSC_GMRES`, `TUGO_GMRES`, `MUMPS`, `MUMPS_SYM`, `SpDOMESTIC`, `HIPS`, `PASTIX`, `AUTO`). |
 | `sub_solver_type` | Sub-solver type for sub-cycling (`AUTO`, `DOMESTIC`, `LAPACK`, `SUNPERF`, `UMFPACK`, `PETSC_GMRES`, `TUGO_GMRES`, `MUMPS`, `MUMPS_SYM`, `SpDOMESTIC`, `HIPS`, `PASTIX`). |
 | `auxilliary_solver_type` | Auxiliary solver type (`AUTO`, `DOMESTIC`, `LAPACK`, `SUNPERF`, `UMFPACK`, `PETSC_GMRES`, `TUGO_GMRES`, `MUMPS`, `MUMPS_SYM`, `SpDOMESTIC`, `HIPS`, `PASTIX`). |
 | `SolverShowPerfs` | Flag to display solver performance (`0` for no display). |
 | `solver_mode` | Solver mode (`AUTO`, `SEQUENTIAL`, `PARALLEL`). |
 | `mode` | Simulation mode (`NO-DYNAMIC`, `2D`, `3D-BAROTROPIC`, `3D-DIAGNOSTIC`, `3D-PROGNOSTIC`). |
 | `compressibility` | Compressibility mode (`BOUSSINESQ`, `COMPRESSIBLE`). |
 | `pressure_mode` | Pressure mode (`HYDROSTATIC`, `NON-HYDROSTATIC`). |
 | `wetting_drying` | Wetting/drying capability (`DISABLED`, `ENABLED`). |
 | `OPENMP_nCPUsMax` | Maximum number of CPUs for OpenMP (default: `-1`). |
 | `ProcessPartitioning` | Flag to use METIS for process partitioning (`TRUE`, `FALSE`). |
 | `UnpartitionedProcessing` | Mode for global information processing (`COLLECTIVE`, `NODE`, `CLUSTER`). |
 | `PartitionBalancing` | Flag to balance extra-load due to sub-cycling (`TRUE`, `FALSE`). |
 | `ParallelMatrixDistribution` | Matrix distribution in parallel solver (`AUTO`, `CENTRALIZED`, `DISTRIBUTED`). |
 | `ParallelRHSDistribution` | RHS distribution in parallel solver (`AUTO`, `CENTRALIZED`, `DISTRIBUTED`). |
 | `ParallelSolutionDistribution` | Solution distribution in parallel solver (`AUTO`, `CENTRALIZED`, `DISTRIBUTED`). |
 | `MetisPath` | Path to METIS partitioner (`mpmetis`). |
 | `ArchivePartitionedMesh` | Flag to archive MPI partition mesh (`TRUE`, `FALSE`). |
 | `ArchiveMeshPartition` | Flag to archive mesh MPI partition (`TRUE`, `FALSE`). |
 | `PartitionMinElements` | Minimum number of elements per partition (default: `2000`). |
 | `3d_pressure` | Flag for 3D pressure (`TRUE`, `FALSE`). |
 | `echo_file` | Echo filename (default: `tugo.echo`). |
 | `CompatibilityScale` | Compatibility scale (default: `1.0`, dimensionless). |
 | `Stream_TMPDIR` | Temporary directory for stream access (`AUTO`, `NONE`, `<dirname>`). |