Table of contents

Table of contents

1. The DiskSpd Storage Performance Tool
   • Vision for the DiskSpd tool
   • Acknowledgments
2. Command line and parameters
   • Event parameters
   • Event Tracing for Windows (ETW) parameters
   • Size conventions for DiskSpd parameters
3. Customizing tests
   • Set a test duration
   • Control caching
   • Set random or sequential access hints
   • Block Size
   • Test random I/O
   • Test sequential I/O
   • Perform a write test
   • Set a base target offset
   • Set the maximum target offset
   • Limit the total number of threads
   • Access from multiple threads & thread stride
   • Number of outstanding I/O requests
   • Balance queues
   • Alternatively, specify “think” time and I/O bursts
   • Rate limits
   • Use completion routines instead of I/O completion ports
   • Set CPU affinity
   • Create test files automatically
   • Separate buffers for read and write operations
     • Specifying write entropy
     • Support for large pages
   • Including Event Tracing for Windows (ETW) statistics
   • Display a progress indicator
   • Control the initial state of the random number generator
   • Run DiskSpd in verbose mode
   • Use named events to synchronize testing
   • Use an XML file to provide DiskSpd parameters
     • Creating an XML profile file
     • Specify multiple time spans in the XML profile
   • Canceling a test run
4. Analyzing test results
   • Latency
   • IOPs statistics
5. Sample command lines