ag is now default (round robin group-aware affinity) Latency histogram now reports to 9-nines (one part in one billion) in both text and XML outputĮrror message added for failure to open write-content source file (-Z,) Text output: OS/software cache and write-through state are now documented separately (adjacent lines) XML: is no longer emitted (still parsed, though), in favor or and ![]() XML: adds a new element to specify write-through Among other things, this allows buffered write-through to be specified (-Sbw). S is expanded to control write-through independent of OS/software cache. (Make sure you run these as an administrator, or from an elevated command line.) This doesn't have to be as complex as it sounds, because you can start using Diskspd with very few switches, and then add more as you learn how it works.Ī command like diskspd c: runs a read test on drive C:, for example diskspd c: e: benchmarks both drives diskspd -d30 c: e: runs the tests for a duration of 30 seconds (the default is 10) diskspd -c100M -d30 c: e: runs the test with a 100MB file. It's a command-line program which provides a vast amount of control over the testing methods, duration, threads, queues, CPU and IO affinity, reporting, and more. Or as they describe it, a program which "combines robust and granular IO workload definition with flexible runtime and output options, creating an ideal tool for synthetic storage subsystem testing and validation." Diskspd is an open-source hard drive benchmarking tool from Microsoft.
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