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DiskSpd
=======
DiskSpd is a storage performance tool from the Windows, Windows Server and Cloud Server Infrastructure engineering teams at Microsoft. Please visit <https> for updated documentation.
This project has adopted the [Microsoft Open Source Code of Conduct](https://opensource.microsoft.com/codeofconduct/). For more information see the [Microsoft Open Source Code of Conduct FAQ](https://opensource.microsoft.com/codeofconduct/faq/) or contact <opencode> with any additional questions or comments.
What's New?
===========
## DISKSPD ##
DISKSPD 2.0.21a 9/21/2018
* Added support for memory mapped I/O:
* New `-Sm` option to enable memory mapped I/O
* New `-N<vni>` option to specify flush options for memory mapped I/O
* Added support for providing Event Tracing for Windows (ETW) events
* Included a Windows Performance Recorder (WPR) profile to enable ETW tracing
* Added system information to the ResultParser output
DISKSPD 2.0.20a 2/28/2018
* Changes that may require rebaselining of results:
* New random number generator that may show an observable decreased cost
* Switched to 512-byte aligned buffers with the `-Z` option to increase performance
* New `-O` option for specifying the number of outstanding IO requests per thread
* New `-Zr` option for per-IO randomization of write buffer content
* XML: Adds a new `<ThreadTarget>` element to support target weighting schemes
* Enhanced statistics captured from IOPS data
* Added support for validating XML profiles using an in-built XSD
* Added support for handling RAW volumes
* Updated CPU statistics to work on > 64-core systems
* Updated calculation and accuracy of CPU statistics
* Re-enable support for ETW statistics
DISKSPD 2.0.18a 5/31/2016
* update `/?` example to use `-Sh` v. deprecated `-h`
* fix operation on volumes on GPT partitioned media (<driveletter>:)
* fix IO priority hint to proper stack alignment (if not 8 byte, will fail)
* use iB notation to clarify that text result output is in 2^n units (KiB/MiB/GiB)
DISKSPD 2.0.17a 5/01/2016
* `-S` is expanded to control write-through independent of OS/software cache. Among other things, this allows buffered write-through to be specified (`-Sbw`).
* XML: adds a new `<WriteThrough>` element to specify write-through
* XML: `<DisableAllCache>` is no longer emitted (still parsed, though), in favor or `<WriteThrough>` and `<DisableOSCache>`
* Text output: OS/software cache and write-through state are now documented separately (adjacent lines)
* Latency histogram now reports to 9-nines (one part in one billion) in both text and XML output
* Error message added for failure to open write-content source file (`-Z<size>,<file>`)
Source Code
===========
The source code for DiskSpd is hosted on GitHub at:
<https>
Any issues with DiskSpd can be reported using the following link:
<https> 100+评论
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