Azure Managed Instance General Purpose vs Business Critical tier switching back and forth

Question

Azure Managed Instance General Purpose vs Business Critical tier switching back and forth

Gokhan Varol 111

Can we easily switch between Azure Managed Instance General Purpose vs Business Critical tier. (if we have around 4TB data how long will it take or will it not even affect the current running processes, will it require downtime, if we switch from General Purpose to Business Critical then later can we move back to General Purpose)
We are currently in General Purpose tier having performance (mainly IO related problems), we wanted to test if Business Critical tier would fix the issues.
As I understand the max server data size in Business Critical is 4TB and General Purpose Tier is 8TB (which could be an issue for us)

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Answer 1

@Gokhan Varol Welcome to Microsoft Q&A forums and thank you for your interest in Azure services.

The time taken for scaling will vary depending on the configuration and volume of data.
For scaling General Purpose to Business Critical and vice versa, 90% of operations finish in 2.5 hours + time to seed all databases at 220 GB/hour.

These scenarios are documented in detail here

The database is online and available during the scaling operation but there is a short downtime up to 10 seconds because of the failover to the new instance. You can add a retry logic to your application to handle this scenario.

More details are here

Please let us know if you have any further questions.

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Azure Managed Instance General Purpose vs Business Critical tier switching back and forth

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