De Onde Vêm Essas Colunas?

De Onde Vêm Essas Colunas?

Episode 40 • 2026-09-25 Duration: 10:12

Cosmos DB não tem schema. Tabelas Delta precisam de um. Quando o mirroring conecta os dois, o replicador adivinha — e o chute só alarga. Rastreamos de onde vêm os bytes, por que propriedades renomeadas deixam colunas fantasma cheias de null, e o que stop replication realmente faz.

What we discuss

• How it actually works underneath the abstraction
• The pattern we keep seeing in the field
• A real Reddit/Microsoft Q&A question unpacked
• Where the obvious answer breaks
• Risks of the recommended path
• F-SKU realism — what this actually costs
• When the rejected approach is actually right
• The concrete recommended architecture
• The architectural principle to take home

Key takeaways

• Neste momento, em algum lugar, um container Cosmos está recebendo escritas.
• E alinhe a região da sua capacidade Fabric com a conta Cosmos.
• Três perguntas antes de mexer em qualquer coisa.

Watch the episode

The Fabric Friday video on this topic: https://youtu.be/KJUBmoNFICo

From the video

• 13:19 The Discovered Schema
• 16:20 Nested Data Arrives as a String
• 18:47 Stop Is Not Pause
• 2:53 Demo: Create the Mirror, Count the Rows

Resources

• Mirroring Azure Cosmos DB
• Cosmos DB mirroring FAQ
• continuous backup
• Cosmos DB mirroring limitations
• Migrate an Azure Cosmos DB account from periodic to continuous backup mode
• Migrate from Azure Synapse Link to Cosmos DB mirroring
• Access mirrored data in Lakehouse and notebooks
• How to: Query nested data
• Configure private networks for Azure Cosmos DB Fabric Mirroring
• tutorial
• Monitor Fabric mirrored database replication
• Mirroring public REST API
• Cost of mirroring
• Mirrored database in Fabric (all sources)
• Cosmos DB in Microsoft Fabric (native item)

About the show

AI-generated voices. Matthias — cloned voice. Fabia — designed AI co-host. See Matthias live on YouTube (Fabric Friday), at his meetups, and at conferences like FabCon.

Hosted by Matthias Falland — Microsoft Data Platform MVP and community architect behind the Fabric Periodic Table. New episodes every Friday.

Submit your case

Have an architecture decision you are wrestling with? DM Matthias on LinkedIn — find him as Matthias Falland. Three to five sentences about the decision, your team size, and your current stack. We anonymize before airing.

Este podcast foi gerado por inteligência artificial. As duas vozes são sintéticas: a de Matthias é uma voz clonada e a Fabia é uma co-apresentadora de IA.

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