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Azure Cosmos DB

Build globally distributed, multi-model databases with guaranteed latency.

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Cosmos DB is Microsoft's globally distributed, multi-model database (document, key-value, graph, table). Database engineers earn $120-190k mid-level, essential for globally-scalable applications with low-latency requirements.

Azure Cosmos DB рдореНрд╣рдгрдЬреЗ рдХрд╛рдп

Azure Cosmos DB is Microsoft's globally distributed, multi-model database providing SQL, MongoDB, Cassandra, Gremlin, and Table APIs. It guarantees <10ms latency at the 99th percentile, multi-region replication, and automatic failover. Global scale and low latency are increasingly critical. Cosmos DB is designed from the ground up for this. Key reasons:

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Azure PortalAzure CLICosmos DB SDK (Python, Node.js, .NET)Data Explorer (Azure Portal)SQL API (SQL-like queries)Gremlin for graph queriesMongoDB API (MongoDB syntax)Table API (NoSQL table)Azure Functions (serverless integration)Azure Monitor

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рдкреНрд░рджреЗрд╢рдЬреНрдпреБрдирд┐рдпрд░рдордзреНрдпрдорд╕реАрдирд┐рдпрд░
USA$90k$150k$240k
UK┬г74k┬г123k┬г195k
EUтВм68kтВм112kтВм180k
CANADAC$103kC$171kC$275k

ЁЯОУ рдкреНрд░рдорд╛рдгрдкрддреНрд░реЗ

AZ-104 Azure Administrator
AZ-204 Azure Developer
Azure Cosmos DB Fundamentals

тЭУ FAQ

Is Cosmos DB better than MongoDB?
Cosmos DB scales globally with low latency (single-digit milliseconds). MongoDB requires sharding and replication setup. Cosmos is managed; MongoDB requires operational overhead.
What is the pricing model?
Two options: provisioned throughput (pay for RU/s reserved) or serverless (pay per operation). Provisioned is cheaper for steady workloads; serverless for spiky.
Can I use Cosmos DB for ACID transactions?
Yes, multi-document ACID transactions within a partition. Cross-partition transactions are eventual consistent (limited). For strict ACID, use Azure SQL.
What are Request Units (RUs)?
Cosmos DB's throughput unit. 1 RU = resources to read 1 KB item. A query costs 5-10 RUs; a write costs 5+ RUs. Capacity planning around RU budget.
Can I use Cosmos DB with my existing MongoDB code?
Yes, via MongoDB API. Connect MongoDB drivers to Cosmos DB; most code works unchanged. Minor differences in some features.
How do I backup and restore?
Cosmos DB has continuous backup (30-day retention). Point-in-time restore to any point in window. No manual backup needed.

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рддреБрдордЪрд╛ рдЖрджрд░реНрд╢ рдХрд░рд┐рдЕрд░ рдорд╛рд░реНрдЧ рд╢реЛрдзрд╛

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