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Learn MongoDB 4.x

You're reading from   Learn MongoDB 4.x A guide to understanding MongoDB development and administration for NoSQL developers

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Product type Paperback
Published in Sep 2020
Publisher Packt
ISBN-13 9781789619386
Length 610 pages
Edition 1st Edition
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Author (1):
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Doug Bierer Doug Bierer
Author Profile Icon Doug Bierer
Doug Bierer
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Table of Contents (22) Chapters Close

Preface 1. Section 1: Essentials
2. Introducing MongoDB 4.x FREE CHAPTER 3. Setting Up MongoDB 4.x 4. Essential MongoDB Administration Techniques 5. Section 2: Building a Database-Driven Web Application
6. Fundamentals of Database Design 7. Mission-Critical MongoDB Database Tasks 8. Using AJAX and REST to Build a Database-Driven Website 9. Section 3: Digging Deeper
10. Advanced MongoDB Database Design 11. Using Documents with Embedded Lists and Objects 12. Handling Complex Queries in MongoDB 13. Section 4: Replication, Sharding, and Security in a Financial Environment
14. Working with Complex Documents Across Collections 15. Administering MongoDB Security 16. Developing in a Secured Environment 17. Deploying a Replica Set 18. Replica Set Runtime Management and Development 19. Deploying a Sharded Cluster 20. Sharded Cluster Management and Development 21. Other Books You May Enjoy

Logging configuration options

It is important for troubleshooting and diagnostics purposes to activate MongoDB logging.  Accordingly, there are a number of parameters that can be activated under the systemLog key, as summarized in this table:

Key Notes
path Directory where log files will be created and stored.
logAppend When set to true, after a MongoDB server restart, new entries are appended to the existing log entries. If set to false (default), upon restart, the existing log file is backed up and a new one is created.
verbosity Determines how much information goes into the log. Verbosity levels range from 0 to 5, with 0 as the default. Level 0 includes informational messages. Setting verbosity to 1 through 5 increases the amount of information in the log message as well as debug information.
component This option opens up the possibility of creating more refinements in logging. As an example, to set logging verbosity to 1 for queries, but 2 for storage, add these settings...
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