Category: Replica Sets

  • Understanding the local Database in MongoDB

    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…

  • Replica Sets: Member Roles and Types

    Replica Sets: Member Roles and Types

    MongoDB replica sets are a powerful way to ensure high availability and data redundancy in your database environment. While we won’t delve into all the intricate configuration options here, let’s explore some key member roles and types that allow you to shape your replica set’s behavior according to your needs. Priority: Defining Leadership In a…

  • Replica Sets: Why an Odd Number of Nodes?

    Replica Sets: Why an Odd Number of Nodes?

    If you are using a Replica Set with your MongoDB setup you might be wondering why using an odd number of nodes (or members) is the best practice. After all if you could have four nodes that is probably better than three, right? Not so fast! In this post we will dig in a little…