Map/Reduce

• PouchDB - Secondary Indexes
• Cloudant - MapReduce Primer - Great intro on reduce, group, group_level.
• Views Collation - More documentation on "View Collation".
• Cloudant - MapReduce and the Secondary Index (Video) - Great videos here on mapReduce, secondary indexes, and complex keys.
• Cloudant - Design Documents - Cloudant's documentation is also great resource for learning concepts of CouchDB.

Document Versioning

• Document Revisions (from wiki)
• Simple Document Versioning

• Linux tuning for better CouchDB performance
• Pagination strategies with PouchDB
• Best Practices - Best Practices, eHealth Africa.
• Best Practices - Best Practices, eHealth Africa.
• 12 pro tips for better code with PouchDB

Joins

• Joins with Views - Must read for understanding approach on doing efficient joins for CouchDB/PouchDB.

Document Versioning

• Official Blog

Document Versioning

• Official Docs
• FAQ (old wiki) - Seems to have more faqs than the [new wiki](https://cwiki.apache.org/confluence/display/COUCHDB/Frequently+Asked+Questions).

Document Versioning

• The Definitive Guide - CouchDB's _"Dog"_ Book.
• List of books on the Wiki

Document Versioning

• 10 Common Misconceptions - More videos from this [conference](http://conf.couchdb.org/).
• The NoSQL Tapes - CouchDB is discussed on [Volume 5 - CouchDB](http://nosqltapes.com/video/hoffman-and-kocoloski-on-cloudant-and-couchdb), [Volume 8 - MapReduce](http://nosqltapes.com/video/understanding-mapreduce-with-mike-miller).
• Scaling Out with BigCouch - O'Reilly video on scaling out with BigCouch.
• IBM - The New Builders Webinar Series
• The NoSQL Tapes - CouchDB is discussed on [Volume 5 - CouchDB](http://nosqltapes.com/video/hoffman-and-kocoloski-on-cloudant-and-couchdb), [Volume 8 - MapReduce](http://nosqltapes.com/video/understanding-mapreduce-with-mike-miller).

Document Versioning

• IRC - `irc://irc.freenode.net/couchdb`
• Apache CouchDB Conf - Lots of video links.
• Bylaws
• IRC - `irc://irc.freenode.net/couchdb`

Mailing List

• Mailing Lists
• Mailing Lists Description
• Grokbase - Mailing lists in a [Stack Overflow](http://stackoverflow.com/questions/tagged/couchdb)-like interface.
• :star2:**The** ***Amazing*** **CouchDB Committers** *and* **Project Managers** :heart_eyes_cat:

Companies

• eHealth Africa - Big user of CouchDB, check out their [best practices](https://github.com/eHealthAfrica/couchdb-best-practices).
• Bitnami Launchpad for Google Cloud Platform - Host CouchDB on Google Cloud Platform.

Related Projects

• PouchDB - A pocket-sized database.
• FoundationDB - CouchDB 4.0 will utilize FoundationDB.
• Couchbase - NoSQL database.
• Migrating from Apache CouchDB - Comparison of CouchDB and CouchBase
• RxDB - NoSQL-database for JavaScript Applications. RxDB provides modules for realtime replication with any CouchDB compliant endpoint and also with custom GraphQL endpoints.

Related Projects

• Dynamo and CouchDB Clusters - Article about scaling CouchDB, using clusters.
• What Every Developer Should Know About CouchDB - Article about lessons learned.
• CouchDB Maximum Database Size
• NOSQL Patterns
• Persistent Trees in git, Clojure and CouchDB
• CouchDB - JSON and B-trees and REST, oh my!
• Google’s paper on Sawzall - Exotic Reductions Examples.

Attachments

• Are attachments duplicated for each revision? - Mailing list discussion about attachments across revisions.

Backups

• Simple CouchDB and Cloudant Backup - Article on IBM about backups.

CouchApps

• List of CouchApps
• Ddoc Lab - Create couchapps and CouchDB design docs right in your browser.

Scaling

• Bitnami CouchDB - Bitnami makes it easy to run CouchDB in the cloud.

Scaling

• Official CouchDB Wiki
• Official CouchDB Wiki (old) - Some things aren't on new wiki yet.
• List of CouchDB Clients
• List of CouchDB Useful Utilities
• Old Wiki's Related Projects List