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133

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2
+4  Q: 

Are there any Design Guidelines for Documental Databases?

Just wondering if there are any kind of guidelines for when you are designing a document-oriented db and I am talking especially about CouchDb.

I know that being schemaless things can take the shape that we want but, are there any best practices?

Thanks in advance! =D

A: 

I don't know specifically about CouchDB, but there is something over in the MongoDB Docs about Schema Design.

Jordan S. Jones  2010-05-20 21:45:00
this isn't as relevant for CouchDB.MongoDB requires consistent data schema for indexing, CouchDB does not. The map/reduce phase and normalize any schema-less data in to a unified index.
mikeal  2010-05-21 18:57:08
@mikeal, What do you mean with "MongoDB does require a consistent data schema for indexing. "?
TTT  2010-05-21 21:49:37
MongoDB's indexes are based on keynames which means you can only have relationships with consistent data schemes. CouchDB's map/reduce allows you to introspect a document and emit a normalized index which means the data can be truly schema-less without limiting what can be indexed.
mikeal  2010-05-25 07:36:55
Ok maybe CouchDB offers more flexibility but MongoDB will not throw an error when a document doesn't have (one of) the keys that are indexed.
TTT  2010-05-26 17:55:15
+3  A: 

Jan Lehnardt recently wrote up a useful overview of data modeling (I would not quite call it "schema" design as you correctly point out).

http://blog.couch.io/post/595079631/document-modelling-rules-of-thumb

jhs  2010-05-21 07:01:14
Thanks for the link! It has great info =D
Hugo  2010-05-24 18:20:22

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