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    50 Tips and Tricks for MongoDB Developers

    • 50 Tips and Tricks for MongoDB Developers

    • By:

    • Publisher: O'Reilly Media, Inc.

    • Pub. Date:

    • Print ISBN-13: 978-1-4493-0461-4

    • Pages in Print Edition: 68

    • Subscriber Rating: 1 out of 5 rating1 [1 Rating]

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    Overview

    A collection of tips, tricks, and hacks to help MongoDB developers get the most out of the software. The tips cover everything from application design to data safety and monitoring.

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    Average Rating: 1 out of 5 rating Based on 1 Rating

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    Table of Contents

     

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    50 Tips and Tricks for MongoDB Developers

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    Preface
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    Who This Book Is For

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    Conventions Used in This Book

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    Using Code Examples

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    Safari® Books Online

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    How to Contact Us

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    1 Token    1. Application Design Tips

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    Tip #1: Duplicate data for speed, reference data for integrity
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    Example: a shopping cart order

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    Decision factors

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    Tip #2: Normalize if you need to future-proof data

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    Tip #3: Try to fetch data in a single query
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    Example: a blog

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    Example: an image board

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    Tip #4: Embed dependent fields

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    Tip #5: Embed “point-in-time” data

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    Tip #6: Do not embed fields that have unbound growth

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    Tip #7: Pre-populate anything you can

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    Tip #8: Preallocate space, whenever possible

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    Tip #9: Store embedded information in arrays for anonymous access

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    Tip #10: Design documents to be self-sufficient

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    Tip #11: Prefer $-operators to JavaScript
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    Behind the scenes

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    Getting better performance

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    Tip #12: Compute aggregations as you go

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    Tip #13: Write code to handle data integrity issues

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    1 Token    2. Implementation Tips
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    Tip #14: Use the correct types

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    Tip #15: Override _id when you have your own simple, unique id

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    Tip #16: Avoid using a document for _id

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    Tip #17: Do not use database references

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    Tip #18: Don’t use GridFS for small binary data

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    Tip #19: Handle “seamless” failover

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    Tip #20: Handle replica set failure and failover

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    1 Token    3. Optimization Tips

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    Tip #21: Minimize disk access
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    Fuzzy Math

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    Tip #22: Use indexes to do more with less memory

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    Tip #23: Don’t always use an index
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    Write speed

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    Tip #24: Create indexes that cover your queries

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    Tip #25: Use compound indexes to make multiple queries fast

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    Tip #26: Create hierarchical documents for faster scans

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    Tip #27: AND-queries should match as little as possible as fast as possible

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    Tip #28: OR-queries should match as much as possible as soon as possible

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    4. Data Safety and Consistency
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    Tip #29: Write to the journal for single server, replicas for multiserver

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    Tip #30: Always use replication, journaling, or both

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    Tip #31: Do not depend on repair to recover data

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    Tip #32: Understand getlasterror

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    Tip #33: Always use safe writes in development

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    Tip #34: Use w with replication

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    Tip #35: Always use wtimeout with w

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    Tip #36: Don’t use fsync on every write

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    Tip #37: Start up normally after a crash

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    Tip #38: Take instant-in-time backups of durable servers

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    1 Token    5. Administration Tips
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    Tip #39: Manually clean up your chunks collections

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    Tip #40: Compact databases with repair

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    Tip #41: Don’t change the number of votes for members of a replica set

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    Tip #42: Replica sets can be reconfigured without a master up

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    Tip #43: --shardsvr and --configsvr aren’t required

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    Tip #44: Only use --notablescan in development

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    Tip #45: Learn some JavaScript

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    Tip #46: Manage all of your servers and databases from one shell

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    Tip #47: Get “help” for any function

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    Tip #48: Create startup files

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    Tip #49: Add your own functions
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    Loading JavaScript from files

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    Tip #50: Use a single connection to read your own writes

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    About the Author

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    Copyright

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    Description
    Content

    Visit the catalog page for 50 Tips and Tricks for MongoDB Developers

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    Visit the errata page for 50 Tips and Tricks for MongoDB Developers

    • Errata