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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 DB์ด๋ž€

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:

๐Ÿ”ง ๋„๊ตฌ & ์ƒํƒœ๊ณ„
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

๐Ÿ’ฐ ์ง€์—ญ๋ณ„ ์—ฐ๋ด‰

์ง€์—ญ์ฃผ๋‹ˆ์–ด๋ฏธ๋“ค์‹œ๋‹ˆ์–ด
๐Ÿ‡บ๐Ÿ‡ธUSA$90k$150k$240k
๐Ÿ‡ฌ๐Ÿ‡งUKยฃ74kยฃ123kยฃ195k
๐Ÿ‡ช๐Ÿ‡บEUโ‚ฌ68kโ‚ฌ112kโ‚ฌ180k
๐Ÿ‡จ๐Ÿ‡ฆCANADAC$103kC$171kC$275k

๐ŸŽ“ ์ž๊ฒฉ์ฆ

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

โ“ ์ž์ฃผ ๋ฌป๋Š” ์งˆ๋ฌธ

โ–ถIs 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.
โ–ถWhat 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.
โ–ถCan 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.
โ–ถWhat 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.
โ–ถCan 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.
โ–ถHow 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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