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How to Change a MongoDB Primary to a Secondary
Maintaining a MongoDB Replica Set requires occasional maintenance and upgrades. Sometimes, this necessitates taking the primary node offline or converting it to a secondary node. Learn more about different Replica Set roles, Replica Sets: Member Roles and Types This guide will walk you through the steps needed to safely perform this task. Why Would You…
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Understanding the local Database in MongoDB
When you set up and initiate a replica set in MongoDB, all databases and collections on the primary database are replicated to the secondary nodes. However, there is one crucial exception: the local database. What is the local Database? Each mongod instance maintains its own unique copy of the local database. It contains collections that…
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MongoDB.local NYC 2024
Last week I had the opportunity to attend MongoDB.local NYC and help out at the MongoDB Community Booth. We had a fun “scavenger hunt” around the MongoDB Community website to get a MongoDB t-shirt which saw a lot interest (everyone loves a free t-shirt!) It was great to catch up with many members of the…
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Getting Started with MongoDB on Docker: A Step-by-Step Guide
Are you eager to dive into MongoDB but unsure where to start? Docker provides a convenient way to set up MongoDB for local development, allowing you to experiment without the complexity of traditional installations. In this guide, we’ll walk you through the process of installing MongoDB on Docker, persisting database data files, connecting to MongoDB,…
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MongoDB Arrays: Using Operators
MongoDB offers a versatile and powerful way to work with array data using field query operators. Arrays are commonly used to store various types of data, and MongoDB’s array query operators allow you to manipulate and retrieve data from arrays efficiently. In this post, we’ll explore how to leverage some of these operators to make…
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MongoDB’s “Hidden” Index Feature
Indexes are crucial for optimizing query performance, but they can also be very costly to create (meaning they can take a lot of CPU, especially if built from scratch on existing data.) So, what if you’re uncertain about removing one? MongoDB offers a nifty solution: hiding indexes. Understanding Hidden Indexes Before bidding adieu to an…
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Streamlining Document Updates with Pipelines
While you might be familiar with MongoDB’s Aggregation Framework pipelines (primarily used for crafting intricate query results), a lesser-known capability is their application in updating documents. This article will delve into the utilization of aggregation pipelines for efficient document updates. Understanding the Basics Let’s start with an example document representing a breakfast recipe: Adding Calculated…
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Document Schema Validation
MongoDB’s flexible document model allows for a wide range of data types within a collection, offering an vast amount of versatility. However, in certain scenarios, it becomes imperative to maintain a structured schema across all documents, while retaining the benefits of MongoDB’s inherent flexibility. This is where document schema validation proves to be a powerful…
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Query Plans: The Basics
Optimizing the performance of MongoDB relies heavily on effective querying. However, determining areas for optimization in a query can be challenging. This is where the concept of a query plan comes into play … an amazing tool for developers and database administrators to pinpoint and address performance bottlenecks. What is a Query Plan? In MongoDB,…
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Exploring MongoDB Configuration
Configuring MongoDB is a crucial step in optimizing its performance and tailoring it to the specific requirements of your application. MongoDB provides a configuration file that allows you to fine-tune various settings. In this blog post, we’ll delve into some of the essentials of the MongoDB configuration file, and explore its structure. Configuration File The…
