Running the Experiments

Step 1 — Clone the Repository (with Submodules)

This project depends on confznsplusplus, which is included as a Git submodule.

Clone the repository with:

git clone --recurse-submodules <your-repo-url>
cd SilentZNS-bench

If you already cloned without submodules, run:

git submodule update --init --recursive

Host Requirements

• CPU with support for at least 32 threads
• At least 64 GB of memory
• It is strongly recommended to run experiments on bare-metal hardware (not inside a VM) for accurate performance results

Step 2 — Install and Configure MOSEK

MOSEK is required for building the allocation components.

2.1 Download MOSEK

Download MOSEK from: https://www.mosek.com/downloads/

Extract it to a location of your choice, for example: /path/to/mosek

2.2 Set Environment Variables

Add the following to your shell (or .bashrc):

export MOSEK_ROOT="/path/to/mosek"
export MOSEK_PLATFORM="$MOSEK_ROOT/11.0/tools/platform/linux64x86"

export MOSEKLM_LICENSE_FILE="/path/to/mosek/license/mosek.lic"
export LD_LIBRARY_PATH="$MOSEK_PLATFORM/bin:$LD_LIBRARY_PATH"

2.3 Verify Installation

Run: ls $MOSEK_PLATFORM/bin

Step 3 — Build ConfZNS++ / FEMU

Navigate to the FEMU build directory:

cd confznsplusplus/build-femu

Build FEMU (if not already built):

./femu-compile.sh

Step 4 — VM Requirements

Follow the steps below to prepare your virtual machine environment.

4.1. Create the VM Image

Create your VM image by following the official ConfZNS++ setup guide (recommended OS: Ubuntu 22.04):
https://github.com/BU-DiSC/confznsplusplus/tree/15f52ff88651ed3e8746da7e17f6076d3f4c0bcb?tab=readme-ov-file#installation

4.2. Install Required Dependencies

Inside the VM, install the required libraries:

• libzbd
• libnvme

4.3. Configure the I/O Scheduler

Set the NVMe device scheduler to mq-deadline:

echo mq-deadline | sudo tee /sys/block/<nvme-device>/queue/scheduler

4.5 Specify the path to the VM in run-zns-exp.sh

OSIMGF=/path/to/femu.qcow2

Ensure that SSH access is configured between the host and the VM. This is required for running experiments and transferring results.

Step 5 — Experiment Configuration

Edit the top section of the script /raw-bench/run.sh:

EXP_ID=2
SSD_ID=0
PARALLEL_ZONES=8
DEVICE_PATH="/dev/nvme0n1"

HOST_BASE_DIR="/path/to/VLDB"

SSH_PORT=8080
VM_USER="your_vm_username"
VM_HOST="localhost"

Parameters:

EXP_ID: experiment type
0 = all
1 = interference
2 = occupancy
6 = allocation
SSD_ID: selects SSD configuration (defined in script)
DEVICE_PATH: NVMe device inside VM
Example: /dev/nvme0n1

HOST_BASE_DIR: root directory containing:

raw-bench/
confznsplusplus/

VM_USER, SSH_PORT: VM access credentials

Step 5 — Run Experiments

chmod +x run.sh
./run.sh

Results

Results are copied back to:

raw-bench/
├── exp_allocation/new_results/
├── exp_interference/results/
├── exp_occupancy/new_results/
└── exp_rw_bench/new_results/

You can generate plots with scripts from raw-bench/plotting