Azure Iaas Disk Differences

Rolf Tesmer looks at whether to use SSDs or Premium Disk for SQL Server instances on Azure IaaS:

To test the throughput I will run a set test with the TempDB database on D:\ (local SSD) and then rerun the test again with the TempDB moved onto F:\ (P30 premium disk).  Between the tests SQL Server is restarted so we’re starting with a clean cache and state.

The test SQL script will create a temporary table and then run a series of insert, update, select and delete queries against that table.  We’ll then capture and record the statistics and time.

The results were interesting; read on to learn more.

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