# FIO Benchmarking Script

This script performs disk I/O benchmarking using FIO (Flexible I/O Tester) on a specified network-mounted directory. It conducts both random and sequential read/write tests to evaluate the performance of the disk under various conditions.

## Prerequisites

- FIO installed on your system.
- Bash shell.
- Network-mounted directory accessible at the specified mount point.

## Usage

1. Ensure the network mount point specified by the `network_mount` variable or `-m` option exists and is accessible.
2. Modify the script variables as needed to match your testing requirements:
   - `file_size`: Size of the test file. Default is "8G".
   - `iodepth`: Number of I/O operations to keep in flight. Default is "16".
   - `numjobs`: Number of parallel streams for the test. Default is "4".
   - `runtime`: Limits each test's runtime (in seconds). Default is "300" (5 minutes).
   - `ioengine`: I/O engine to use. Default is "libaio".
3. Execute the script with the desired options:
   ```sh
   ./fio_throughput_test.sh -s <file_size> -d <iodepth> -j <numjobs> -r <runtime> -e <ioengine> -m <network_mount>
4. To see all available options, use the -h flag:
   ```sh
   ./fio_throughput_test.sh -h
   ```
## Script Structure

- **Initialization**: Sets up variables for the network mount, log directory, and FIO parameters.
- **Benchmark Tests**:
  - **Random Write Test**: Measures random write performance.
  - **Random Read Test**: Measures random read performance.
  - **Sequential Write Test**: Measures sequential write performance.
  - **Sequential Read Test**: Measures sequential read performance.
- **Logging**: Outputs the results to a log file named `fio-<hostname>-YYYY-MM-DD.log` in `$HOME/log/fio-tests`.

## Modifying the Script

You may adjust the script parameters such as `file_size`, `iodepth`, `numjobs`, `runtime`, `ioengine`, and `network_mount` based on your specific testing needs or the capabilities of the disk being tested.

## Note

This script is designed for use with network-mounted storage. Ensure that your network mount is correctly configured and that the specified mount point is accessible before running the script.
   
## Running with Slurm
To run the FIO benchmarking script on multiple nodes using Slurm, you can use the included batch script.