In this presentation, we focused on three strengths at the bottom half of the scale, with Basic (5
DTU), Standard S3 (100 DTU) and Premium P2 (250 DTU). Based on our measurements we have seen:

- Significant variations in performance between the different geographical locations
- Significant variations in performance for the same database at different times
- Surprisingly poor performance for the Standard S3 and Basic Service

Based on our measurements we can conclude that an Azure database with a specific DTU strength
does not necessarily provide the same performance at all cloud locations. For the Azure Basic
databases, there was a 20% performance difference between the three tested locations (West
Europe, West Japan and West US). For Standard S3 databases the difference had grown to 25%,
while on Azure Premium P2 databases the performance difference was a staggering 100%. When the
same test takes 2 times as longer on one database than the other, given the same DTU strength, it’s
surprising that it can be sold as the same product. In other words, ordering the same service at
different locations you may end up with completely different underlying hardware. It addition there
are large variations in the performance at the same location, which is indicative of an immature and
unstable service performance.
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