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SQLIOSim: Default Testing Pattern

The SQLIOSim knowledge base article outlines the various configuration files in detail.  https://support.microsoft.com/kb/231619 - How to use the SQLIOSim utility to simulate SQL Server activity on a disk subsystem.

I still get inquires about what should I run by default. My answer is: Use the default.config.ini but update the following.

  • Number of iterations to 5 ore more
  • Testing iteration duration to 300 seconds or more. I like 600 myself.
  • File(s) - Make sure the names, paths match that of the problem system and you want the size to be larger than the hardware cache. (NOTE: Don't specify the SQL Server .MDF or .LDF files or it will erase the database data)

Bob Dorr
SQL Server Principal Escalation Engineers

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