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Cosmos DB Articles

50 articles

Provision Cosmos DB with Terraform

The most surprising thing about provisioning Cosmos DB with Terraform is how much of the "magic" is actually just declarative API calls, and how little .

2 min read

Write User-Defined Functions in Cosmos DB for Custom Query Logic

Cosmos DB user-defined functions UDFs let you extend the query language with custom JavaScript logic, but they're actually a performance bottleneck if y.

2 min read

Query Cosmos DB with Azure Synapse Analytics via Analytical Store

Cosmos DB's Analytical Store is a high-throughput, low-cost storage layer that allows you to run analytical queries on your operational data without imp.

3 min read

Cosmos DB Autoscale vs Manual RU: Choose the Right Throughput Model

Autoscale throughput in Cosmos DB doesn't just scale up and down; it actively predicts your workload and adjusts provisioned Request Units RUs proactive.

2 min read

Trigger Azure Functions on Cosmos DB Change Feed Events

Azure Functions can react to changes in Cosmos DB, but the mechanism isn't a direct "event" in the traditional sense; it's a polling loop that checks fo.

3 min read

Bulk Import and Update Cosmos DB Data with the Bulk Executor Library

Cosmos DB's Bulk Executor library doesn't actually move data in bulk; it parallelizes individual operations to feel like a bulk operation.

3 min read

Run Bulk Operations in Cosmos DB with the SDK

Cosmos DB's SDKs offer a way to batch operations, but it's not a single "batch" API call; it's a collection of operations that are sent together.

3 min read

Use Cosmos DB Cassandra API as a Managed Cassandra Service

The most surprising thing about using Cosmos DB with its Cassandra API is that it's often not about replicating Cassandra's behavior, but about leveragi.

2 min read

Process Real-Time Changes in Cosmos DB with Change Feed

The Cosmos DB Change Feed doesn't actually "process" changes in real-time; it's a persistent log of historical changes that you then process.

2 min read

Speed Up ORDER BY Queries with Cosmos DB Composite Indexes

Composite indexes are the secret sauce for making ORDER BY queries fly in Cosmos DB, especially when you're sorting on multiple fields.

2 min read

Resolve Write Conflicts in Cosmos DB Multi-Region Writes

Cosmos DB's multi-region write feature, while incredibly powerful for global availability, can sometimes lead to write conflicts.

5 min read

Cosmos DB Consistency Levels: Strong vs Eventual vs Session

Cosmos DB's consistency levels aren't a dial you turn for "more consistent" or "less consistent"; they're fundamentally different guarantees about when .

5 min read

Cosmos DB Container vs Database RU Provisioning: Which to Use

The most surprising truth about Cosmos DB RU provisioning is that "container" isn't just a smaller scope than "database"; it's fundamentally a different.

2 min read

Enable Continuous Backup and Point-in-Time Restore in Cosmos DB

Cosmos DB's continuous backup mode is a game-changer for data durability, but its true power lies in enabling point-in-time restore PITR, which is far m.

2 min read

Cut Cosmos DB Costs: RU Optimization, TTL, and Autoscale

Cosmos DB's Request Unit RU model is less about throughput and more about a complex, internally-weighted cost of operations.

4 min read

Optimize Cross-Partition Queries in Cosmos DB to Cut RU Cost

Cosmos DB doesn't actually charge you for cross-partition queries; it charges you for the total Request Units RUs consumed by all partitions involved in.

3 min read

Automatically Expire Cosmos DB Documents with TTL

Automatically Expire Cosmos DB Documents with TTL — practical guide covering cosmos-db setup, configuration, and troubleshooting with real-world examples.

2 min read

Reduce Cosmos DB Latency with the Dedicated Gateway Cache

The Dedicated Gateway Cache doesn't just reduce latency; it fundamentally changes where your requests are processed, moving computation closer to your a.

2 min read

Enable Cosmos DB Diagnostic Logs for Query and RU Analysis

Cosmos DB diagnostic logs are actually a surprisingly flexible, but often overlooked, tool for deep performance analysis, not just general troubleshooti.

3 min read

Cosmos DB .NET SDK Best Practices for Production Throughput

Cosmos DB .NET SDK Best Practices for Production Throughput — The Cosmos DB .NET SDK can be a performance bottleneck if not configured correctly for pro...

5 min read

Develop Against Cosmos DB Locally with the Azure Emulator

The Azure Cosmos DB Emulator lets you develop and test your applications against Cosmos DB without incurring any costs or requiring an Azure subscriptio.

1 min read

Encrypt Cosmos DB with Customer-Managed Keys in Azure Key Vault

Azure Key Vault's customer-managed keys CMK feature allows you to encrypt your Cosmos DB data at rest using keys that you control, rather than Azure's a.

2 min read

Distribute Cosmos DB Globally with Multi-Region Replication

Cosmos DB's global distribution isn't about replicating data; it's about replicating consistency guarantees across regions.

2 min read

Build Graph Applications with Cosmos DB Gremlin API

Cosmos DB's Gremlin API lets you model your data as a graph, but most people don't realize it's actually running a fully managed Apache TinkerPop graph .

3 min read

Use Hierarchical Partition Keys to Avoid Cosmos DB Hot Partitions

Cosmos DB doesn't actually distribute data evenly across partitions if your partition key isn't well-chosen, leading to "hot partitions" that bottleneck.

3 min read

Detect and Fix Hot Partitions in Cosmos DB

Detect and Fix Hot Partitions in Cosmos DB — practical guide covering cosmos-db setup, configuration, and troubleshooting with real-world examples.

5 min read

Tune Cosmos DB Indexing Policy to Reduce RU Consumption

Cosmos DB's indexing policy isn't just about what gets indexed, but how it's indexed, and that has a massive impact on Request Units RUs consumed.

3 min read

Cut Cosmos DB Read Costs with the Integrated Cache

The integrated cache in Azure Cosmos DB can dramatically reduce read costs, but it's not a magic bullet; it's a smart optimization for specific access p.

3 min read

Build High-Throughput Cosmos DB Apps with the Java Async SDK

Cosmos DB's Java async SDK can actually reduce your application's latency and resource consumption by letting it do more work concurrently rather than w.

4 min read

Authenticate to Cosmos DB with Azure Managed Identity

Azure Managed Identity is the most secure and convenient way to authenticate your Azure services to Azure Cosmos DB, eliminating the need to manage cred.

3 min read

Monitor Cosmos DB RU Consumption, Latency, and Errors

Cosmos DB's Request Units RUs are not a cost metric, but a measure of normalized resource consumption, and you can easily exceed your provisioned throug.

3 min read

Use Cosmos DB MongoDB API as a Managed MongoDB Service

Cosmos DB's MongoDB API lets you leverage the familiar MongoDB protocol and drivers while benefiting from Azure's managed infrastructure and global dist.

3 min read

Enable Multi-Region Writes in Cosmos DB for Global Throughput

Cosmos DB doesn't actually replicate writes across regions instantly; it uses a conflict-resolution mechanism to ensure consistency while allowing write.

3 min read

Migrate a NoSQL Database to Cosmos DB with Minimal Downtime

Cosmos DB isn't just a NoSQL database; it's a globally distributed, multi-model database service that lets you provision throughput and storage independ.

3 min read

Exclude Cosmos DB Paths from Indexing to Save RU

Cosmos DB's indexing strategy is a double-edged sword: it makes queries lightning fast, but it can also be a massive drain on your Request Units RUs if .

3 min read

Choose the Right Cosmos DB Partition Key to Avoid Hot Partitions

Choosing the right partition key for Azure Cosmos DB is the single most critical decision you'll make for performance and cost.

4 min read

Restore Cosmos DB to a Point in Time After Accidental Deletion

Restoring a Cosmos DB database to a point in time after accidental deletion isn't about recovering deleted data; it's about creating a new database from.

2 min read

Scale PostgreSQL Globally with Cosmos DB for PostgreSQL

Scale PostgreSQL Globally with Cosmos DB for PostgreSQL — practical guide covering cosmos-db setup, configuration, and troubleshooting with real-world e...

3 min read

Connect to Cosmos DB Privately with Azure Private Endpoint

Azure Private Endpoint for Cosmos DB isn't just about blocking public access; it fundamentally changes how your application thinks about reaching your d.

2 min read

Get Started with Cosmos DB Using the Python SDK

Cosmos DB is a globally distributed, multi-model database service that offers a variety of APIs to interact with your data.

3 min read

Fix Cosmos DB 429 Rate Limiting Errors by Tuning RU

Cosmos DB is throttling your requests because you're exceeding the provisioned throughput, leading to 429 Too Many Requests errors.

5 min read

Control Cosmos DB Data Plane Access with RBAC

Cosmos DB's data plane access, often thought of as just "reading and writing data," is actually controlled by the same RBAC mechanisms you use for manag.

2 min read

Understand Cosmos DB Request Units and Plan Capacity

Cosmos DB Request Units RUs aren't a direct measure of CPU, memory, or network, but rather a normalized abstraction of all the resources a database oper.

3 min read

Protect Cosmos DB Resources from Deletion with Resource Locks

Azure Cosmos DB resources can be accidentally deleted, leading to extended downtime and data loss. Resource locks prevent this by disallowing certain op.

2 min read

Implement Retry Logic for Cosmos DB SDK Calls in Production

Cosmos DB SDKs are designed to be resilient, but that doesn't mean your application code can be passive about network hiccups or transient service issue.

4 min read

Run Cosmos DB in Serverless Mode for Unpredictable Workloads

The real magic of Cosmos DB serverless isn't just that it scales down to zero; it's that it actively punishes predictable, high-throughput workloads by .

2 min read

Integrate Cosmos DB with Spring Boot Applications

Integrate Cosmos DB with Spring Boot Applications — practical guide covering cosmos-db setup, configuration, and troubleshooting with real-world examples.

4 min read

Optimize Cosmos DB SQL API Queries to Cut RU and Latency

Cosmos DB's SQL API is designed for performance, but hitting those aggressive latency and RU Request Unit targets often feels like wrestling with a blac.

4 min read

Write Stored Procedures and Triggers in Cosmos DB

Cosmos DB stored procedures and triggers aren't database-level code that runs on a dedicated SQL engine; they're JavaScript functions that execute on th.

2 min read

Migrate Azure Table Storage to Cosmos DB Table API

Migrating from Azure Table Storage to Cosmos DB Table API is often framed as a simple upgrade, but the real win is unlocking drastically different perfo.

3 min read
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