MongoDB is a scalable, high-performance, open source, document-oriented database. It supports a large number of languages and application development platforms. Questions about administrating it can be asked on dba.stackexchange.com

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34
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2answers
3k views

Strategy for generating unique and secure identifiers for use in a “sometimes offline” web app

I have a web based project that allows users to work both online and offline and I'm looking for a way to generate unique ids for records on the client side. I'd like an approach that works while a ...
8
votes
6answers
7k views

Is MongoDB the right choice in my case? [closed]

I'm going to build my first real project in Rails that consist in a web app made of 3 main parts: The static part where no database is used The User registration part which will require a database ...
6
votes
4answers
2k views

I want a trivial example of where MongoDB can scale but a relational database will have trouble

I'm just learning to use MongoDB, and when discussing with other programmers would like a quick example of why NoSQL can be a good choice compared to a traditional RDBMS - however the scenarios I come ...
5
votes
3answers
2k views

DDD - Aggregate Roots - Dealing with Efficiency and Concurrency

First off, I'll admit that I'm a newbie to DDD and need to read the "blue book". I'm building a system that has an AggregateRoot of type "Match". Each Match can have a collection of "Votes" and also ...
4
votes
1answer
581 views

what is sharding in MongoDB

i have just reading MongoDB.came across sharding but not getting what exactly is it .watever i understood is its better to have more small servers than a huge one for data storage and when data ...
4
votes
3answers
388 views

Is MongoDB appropriate for systems that will be likely to change?

I've been using MongoDb (mainly with Meteor) and for me, it has been a great way to mock up prototypes and proof of concepts quickly. I'm just wondering, after building the initial product, if your ...
4
votes
2answers
186 views

Does the use of mongodb enhance extending/changing database driven applications?

When an application is created which need to store data, an SQL database is used very often. So did I in a lot of asp.net applications. The resulting applications have often an ORM like the entity ...
4
votes
3answers
280 views

How would you represent an object that can be of multiple types, when storing it as a document in MongoDB?

Somewhat related to this question, say that I have an object category which, depending on which type of object I have, has different restrictions on what it contains. (if you can reword the previous ...
4
votes
1answer
1k views

What is a good pattern for multi language in MongoDb?

Say I want to build a website that support multiple language and use MongoDB datastore. I wonder what is a good approach to have multiple versions of the body and title of an article, one for each ...
4
votes
2answers
2k views

Document-oriented vs Column-oriented database fit

I have a data-intensive application that desperately needs a database make-over. The general data model: There are records with RIDs, grouped together by group IDs (GID). The records have arbitrary ...
4
votes
3answers
131 views

Algorithm that generates a group of men and women who are each interested in everyone from the other gender

In my dating app, I need to compile lists of men and women where all of the men in the list are potentially interested in all of the women in the list, and vice versa. That is, in a list of 10 men ...
3
votes
1answer
1k views

Architecture for a mobile (Android) chat application

I want to develop a chat application that reminds a bit whatsapp, I am doing it as a learning project. I am currently doing it on Android just because I am doing an Android course. The requirements ...
3
votes
1answer
887 views

Should I / can I bundle node.js and mongod together with my application?

I'm working on a web application that runs on node.js and uses MongoDB. It's important to mention that I plan to release the application as commercial software. The way I wrote the installer, it asks ...
3
votes
2answers
2k views

Rails and Mongoid best way to implement sharing system

I have to model User and Board in rails using mongoid as ODM. Each board is referenced to an user through a foreign key user_id and now I want to add the ability to share a board with other users. ...
3
votes
1answer
840 views

What is the recommended MongoDB schema for this quiz-engine scenario?

I'm working on a quiz engine for learning a foreign language. The engine shows users four images simultaneously and then plays an audio file. The user has to match the audio to the correct image. ...
3
votes
0answers
171 views

Do serialization functions belong in a model or a controller?

I'm developing an application where: Models keep data as a multi-dimensional array, which are saved as-is to a MongoDB database. The model is used to provide methods to manipulate the data, and ...
3
votes
2answers
1k views

Why is MongoDb popular with Node.js? [closed]

I've been looking att different web stacks, mainly rails and node.js. One thing that strikes me is that while rails is often used with a relational database Node.js seem to go hand in hand with ...
2
votes
4answers
199 views

Are NoSQL databases the best choice for more efficiently querying large amounts of data?

We are planning to build a travel website in which we will be integrating multiple APIs (eg. DOTW, GTA, Expedia) for Hotels. I have initially tried to use MySQL but since there are huge amounts of ...
2
votes
2answers
605 views

MongoDB: Is this a good schema design?

I'm working on a Meteor app which lets users create events and assign them crew members. I've played around with MongoDB before and made some experiences along the way, where for instance my first ...
2
votes
2answers
5k views

Can I use MongoDB for a commercial web based service?

Can I use MongoDB as the database for providing a paid service? MongoDB is licensed under the AGPL, but the drivers I'm using are MIT licensed. Do I have to buy a commercial license for MongoDB or ...
2
votes
2answers
3k views

What is a reasonable way to structure relationships in MongoDB

I am also using Node - which I am not the most familiar with - if the articles/books/tutorials pertained to this also - that would help even more. I come from a mostly MySQL background - but in this ...
2
votes
2answers
1k views

How to represent a tree structure in NoSQL

I'm new to NoSQL and have been playing around with a personal project on the MEAN stack (Mongo ExpressJs AngularJs NodeJs). I'm building a document editor of sorts that manages nodes of data. Each ...
2
votes
1answer
377 views

Node.js API Architecture

I am currently working on a web app and want to design the interface between nodejs / mongoose and the backbone app. A short description of the app: A user signs up to the application and gets a ...
2
votes
1answer
113 views

Do I need to publish deployment scripts for deploying AGPL licensed work (MongoDB)

MongoDB is dual-licensed with AGPL (the engine) and ASL 2.0 (the drivers). In a nutshell, merely using MongoDB through the drivers does not dictate to release your source code (due to drivers' ASL 2.0 ...
2
votes
1answer
1k views

How to model hashtags with nodejs and mongodb

Existing architecture: nodejs server with mongodb backend. I have strings coming in describing images that can have #hashtags in them. I wish to extract the hashtags from the strings, store the ...
2
votes
1answer
434 views

Sub-Resource data should be embedded in Resource entity or duplicated in NoSQL document?

I have a scenario similar to as depicted below, public class Post { private int id; private int postType; private int score; private User originalPoster; private String title; ...
2
votes
1answer
204 views

In-memory DB to perform intersects on set slices

I have a specific programming need where I need to efficiently store large sorted sets in memory, query them for ranges, and intersect them against other sets that are also queried for ranged. I am ...
1
vote
2answers
123 views

When should I implement authentication in a database?

I'm currently embarking on a MongoDB project (a simple user login system), and I notice that there is an option for authentication. Here is the server string, with the userinfo shown as optional ...
1
vote
2answers
3k views

How to connect Android App to MongoDB deployed on Google Cloud

Currently I am working on a simple app which will be able to connect to MongoDB which is deployed in Google Cloud. I have set it up MongoDB ocaly on my computer and I have made a little JAVA console ...
1
vote
1answer
88 views

database migration with data already in the database in production

I don't know much about migrations, but this is a specific question I'm not sure how to answer. In production, how can one change the database format/schema when there is already user data in there? ...
1
vote
2answers
475 views

Search algorithm

I would like to create a site where users can post articles with the following optional parts: A title Contents (text) Categories Keywords Articles will be stored in mongodb and the site will be ...
1
vote
2answers
575 views

Very-Loose Coupling and Dependency Injection for Database Management

I'm currently setting up a MongoDB database for a web-app. I'm running node.js and using Mongoose to help manage mapping, validation ect. I'm wondering if it's a good idea to really decouple MongoDB ...
1
vote
2answers
64 views

What is better for scalability for this specific dataset, MongoDB or MySQL?

I have a web app which has users, forms, and volunteers signed up on those forms. Currently I am using MongoDB and have it setup with a collection for admins, and a collection for forms with ...
1
vote
1answer
175 views

pre aggregating documents mongodb

In our current setup, most of our database calls are updates where we increment a key by 1. If all one is doing is incrementing certain keys on a document (a lot) in mongodb, and there are several ...
1
vote
1answer
2k views

Storing data in elasticsearch vs mongodb

We are trying to create an online-shopping like application in which we have to store a huge amount of data,since the data that will be stored are mostly document like data, the suggestion was to ...
1
vote
1answer
770 views

Mongodb array vs object

New with Mongodb, and I'm not sure what implications or benefits there are between the use of an array vs an object. So.. As above what are the implications and benefits between the use of arrays ...
1
vote
0answers
42 views

Code structure with MongoDB in python

I am new to MongoDB and python. I know how to make basic use of pymongo in order to manipulate documents. I am having trouble finding how to create some structure or governance in what gets inside ...
1
vote
0answers
53 views

How to consume inconsistent REST API with Mongo DB backend?

We are using a third party REST API and we are building one of the pages on our ASP.NET site around the data it delivers. We get results in JSON, and interact with it mostly using .NET MongoDB Driver. ...
1
vote
1answer
53 views

Proper tree NoSQL structure with focus on full-text searching

I developing an app with tree(folder-file) structure, on which I should perform full-text searches with MongoDB. I did a research on the best tree structure practices and found this great article, but ...
1
vote
0answers
386 views

How to link the data of MongoDB and Neo4j?

I want to implement a system which store the profiles of employee and the resources that they have. There are many types of resources, such as the documents they produced, the techniques they ...
1
vote
0answers
172 views

What's a good approach for updating millions of rows independently?

I have a MongoDB database with millions of users in collection. An aggregation function returns millions of results with the following format: Array ( [_id] => Array ( [user] => MongoId ...
1
vote
0answers
249 views

How to choose which schema design for a tree structured domain model

I have the following classes that I want to store. public class StorableObject { public string Id { get; set; } } public class User : StorableObject { public string Name { get; set; } } ...
0
votes
1answer
44 views

Can I include mongod.exe in my commercial destop based or user self hosted app withou open sourcing it?

I have read the doc and the apgl blog post, but I still have some concerns: Can I include mongodb.exe in my commercial desktop based app? Can I include mongodb.exe in my commercial user self hosted ...
0
votes
2answers
193 views

Design Question: Keep 1000 newest items; DB vs. application

I have a Qt application, which sends and receives messages. Messages are stored in a local MongoDB. The application has a message list window, which shows sent, received and all messages (depending ...
0
votes
1answer
356 views

Modeling user in MongoDB

Our team is learning to work with MongoDB. We have to model the user among other things for an OAuth-based application. We know how to model in the relational world, but are unsure about how to do it ...
0
votes
1answer
359 views

Redis & MongoDB for Metrics Platform

I'm in the process of writing an app that will ultimately display analytics to the user. I've written a service that collects data from an API. This data will then be processed, stored, then when the ...
0
votes
1answer
147 views

Design Pattern for Cron/Schedule in MongoDB

I am looking for a good pattern to handle cron-type data in a MongoDB collection (or collections). I have been peeking at the O'Reilly book MongoDB Applied Design Patterns and poking around the ...
0
votes
1answer
89 views

How to determine which service to call

I have modeled my application using multiple 'user' domain objects. Candidate Recruiter Administrator Each entity extends from an AbstractUser implementing UserInterface. interface UserInterface ...
0
votes
3answers
106 views

Help with database design with a strict and structured subset of clinical data

I'm developing an application to keep some of the data in chronic patients, the data came from a very strict subset of data, vital signs, exams, ecc. On a first glance I thought to create a Patient ...
0
votes
1answer
97 views

Android -> Ruby Server Interface -> Mongodb

I've been wrecking my brain about this for a few days. I'll run my scenario by you and hopefully you can help me. In my head this is how it goes: I have an Android App. I want my Android App to make ...