What is MongoDB indexing and why is it important?
MongoDB indexing is a data structure technique that improves the speed of data retrieval operations on a database. It's important because it allows for faster queries, which enhances application performance.
Can you explain how to create an index in MongoDB?
To create an index in MongoDB, you can use the createIndex()
method on a collection. For example: db.collection.createIndex({ fieldName: 1 })
creates an ascending index on fieldName
.
What are the different types of indexes available in MongoDB?
MongoDB supports several types of indexes, including single field, compound, multi-key, text, and geospatial indexes, each serving different use cases.
How do indexes affect write performance in MongoDB?
Indexes can slow down write operations because the index must be updated whenever a document is added, modified, or deleted. It's essential to balance read and write performance.
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