Skip to content

workload-profiles.md

Latest commit

 

History

History
115 lines (90 loc) · 3.83 KB

workload-profiles.md

File metadata and controls

115 lines (90 loc) · 3.83 KB

VMFleet Workload Profiles

Tool: VMFleet Category: Tool Guide

This guide covers the predefined workload profiles for VMFleet testing and how to execute them.

Built-in Profiles

Profile Description
General Balanced 70/30 read/write, 70% random, 8K blocks — general purpose validation
Peak IOPS 100% random 4K reads — maximum IOPS measurement
VDI Mixed small block I/O simulating Virtual Desktop Infrastructure patterns
SQL OLTP 8K random read/write mix simulating SQL Server OLTP workloads
Sequential Throughput 100% sequential 512K writes for maximum MB/s measurement

Running Tests

Single Profile

.\src\solutions\vmfleet\scripts\Start-VMFleetTest.ps1 `
    -ProfilePath "config/profiles/vmfleet/general.yml" `
    -DurationSeconds 300

Profile Sweep

.\src\solutions\vmfleet\Invoke-VMFleetPipeline.ps1 `
    -ClusterConfigPath "config/clusters/my-cluster.yml" `
    -ProfilePaths @(
        "config/profiles/vmfleet/general.yml",
        "config/profiles/vmfleet/peak-iops.yml",
        "config/profiles/vmfleet/sql-oltp.yml",
        "config/profiles/vmfleet/vdi.yml",
        "config/profiles/vmfleet/sequential-throughput.yml"
    )

Profile Configuration

Profiles are defined in config/profiles/vmfleet/:

# config/profiles/vmfleet/general.yml
profile:
  name: "General"
  description: "Balanced read/write workload for general validation"
  parameters:
    block_size: "8k"
    write_ratio: 30
    random_ratio: 70
    outstanding_io: 8
    threads_per_vm: 2
    duration_seconds: 300
    warmup_seconds: 60

Profile Parameters

Parameter Description Example
block_size I/O block size 4k, 8k, 64k
write_ratio Percentage of I/O that is writes (0–100) 30 for 70/30 read/write
random_ratio Percentage of I/O that is random (0–100) 70 for mostly random
outstanding_io I/O queue depth per thread 8
threads_per_vm DiskSpd threads per fleet VM 2
duration_seconds Test duration (excluding warmup) 300
warmup_seconds Warmup before measurement starts 60

DiskSpd Parameter Mapping

Profile key DiskSpd switch Meaning
block_size -b I/O block size
write_ratio -w Write ratio percentage
random_ratio -r Random I/O ratio percentage
outstanding_io -o Queue depth per thread
threads_per_vm -t Threads per VM
duration_seconds -d Measurement duration
warmup_seconds -W Warmup duration

Expected Thresholds

Profile Primary metric focus Typical pass criteria
General Balanced IOPS + latency Stable mixed IOPS and latency under target
Peak IOPS Max read IOPS Highest sustained random read IOPS
SQL OLTP Read/write DB pattern Low latency under mixed random load
VDI Light mixed desktop load Predictable latency across many VMs
Sequential Throughput MB/s Highest sustained throughput

Profile Selection Guide

  • Use peak-iops.yml for storage ceiling discovery.
  • Use sql-oltp.yml for database-aligned validation.
  • Use vdi.yml for desktop density readiness checks.
  • Use sequential-throughput.yml for bulk transfer throughput checks.
  • Use general.yml for a balanced baseline run.

Collecting Results

After tests complete, parse DiskSpd XML output and aggregate metrics:

.\src\solutions\vmfleet\scripts\Collect-VMFleetResults.ps1 `
    -ResultsPath "results/current-run/"

Next Steps