Questions
3 of 15
1What is sharding in MongoDB?
2Discuss Vertical and Horizontal scaling?
3What are the components of a sharded cluster?
4What is a shard key?
5What are advantages of Sharding?
6What is Shard?
7What are different sharding strategies?
8How to shard a collection?
9What are zones in sharding?
10What is primary shard?
11How do we chose a shard key?
12What is refining a shard key and how to do it?
13How to reshard a collection?
14How to find a shard key?
15Is it possible to change a document's shard key value and how?
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Basics
CRUD
Bulk Operations
Indexing
Data Modelling
Replication
Sharding
Transactions
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What are the components of a sharded cluster?

A MongoDB sharded cluster consists of the following components:

  1. 1

    shard: Each shard contains a subset of the sharded data. Each shard must be deployed as a replica set.

  2. 2

    mongos: The mongos acts as a query router, providing an interface between client applications and the sharded cluster.

  3. 3

    config servers: Config servers store metadata and configuration settings for the cluster. Config servers must be deployed as a replica set (CSRS).