Is Azure SQL Database Reservable on DTU or Only vCore?
Short answer
Azure reservations only apply to vCore-based Azure SQL Database SKUs. DTU-based databases and DTU elastic pools are not eligible for reservations — they will not appear as reservable in Archera.
Why you might not see reservation options
If you have DTU-based databases or DTU elastic pools, Archera will not surface a reservation option for them. This isn't a gap in Archera's coverage — Microsoft does not offer reservation pricing for the DTU purchasing model at all. Per Microsoft's own documentation:
"You cannot reserve DTU-based (basic, standard, or premium) databases in SQL Database. Reservation pricing is only supported for features and products that are in General Availability state."
Serverless vCore
Serverless vCore databases can't be covered by a reservation either, since reservations require committing to a fixed vCore quantity. Serverless usage is instead covered by Azure database savings plans, which offer a flexible, consumption-based discount rather than a fixed capacity commitment.
Converting DTU to vCore
DTU databases and elastic pools can be converted to the vCore model to become reservation-eligible. Conversion has nuances (e.g. mapping the right performance tier and hardware generation, and timing the switch relative to any existing commitments), so contact your Archera account team before converting to make sure the change lines up with your commitment strategy.
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