1
vote
1answer
86 views

Automatic denormalization for a NoSQL database application

We have a use case where we store table-like data, but we know about the schema of the data only at runtime. In our application, a power user defines a schema and normal user can create records and ...
3
votes
2answers
123 views

Would these two scenarios be good candidates for a NoSQL database?

I've checked a few other threads around the topic and search around, I am wondering if someone can give me a clear direction as to why should I consider NoSQL and which one (since there are quite a ...
1
vote
1answer
43 views

n:m as the only way to store notifications?

I have a user and a notifications table. I want to make sure that every users sees a new notification once and only once. Not more, not less. The intuitive idea is to have a n:m relation table with ...
1
vote
1answer
88 views

options for data analytics for time series store

I'm building an Internet of Things solution that has a number of real time feeds. I need to make a couple of design decisions with regards to the data store and reporting and looking for input. I ...
0
votes
1answer
105 views

Dividing database between MySQL and NoSQL

Mine is a typical website developed with LAMP stack. Due to scalability issues we are planning to incorporate NoSQL for the application. For the implementation, we are planning to implement hybrid ...
1
vote
2answers
185 views

Is eventual consistency a wrong solution for e-commerce applications?

I'm reading about eventual consistency in couchDB. I'm somewhat confused by the term and its consequences on an application. Let's say I'm building a distributed e-commerce website where monetary ...
2
votes
0answers
95 views

Would a model like this translate well to a document or graph database?

I'm trying to understand what types of models that I have traditionally persisted relationally would translate well to some kind of NoSQL database. Suppose I have a model with the following ...
11
votes
5answers
2k views

At what size of data does it become beneficial to move from SQL to NoSQL?

As a relational database programmer (most of the time), I read articles about how relational databases don't scale, and NoSQL solutions such as MongoDB do. As most of the databases I have developed ...
0
votes
2answers
216 views

ACID compliant Database that isn't NoSQL? [closed]

I'm not necessarily asking if a NoSQL database can be ACID compliant, which has been asked here: Is there any NoSQL that is ACID compliant? I'm wondering if we have a database either now or in the ...
4
votes
1answer
365 views

Designing a universal database driver class

I have a homebrew MVC framework that I have been using for a while, and it has been working great, but I am planning an upgrade to it for its ORM classes. So far, it only supports SQL databases by ...
2
votes
4answers
670 views

Why NoSQL (Key-Value) storage become popular these days?

It seems that NoSQL concept not something very new and innovative, but these days become very popular. Why it become popular recently but not happen in the time when SQL is very popular?
4
votes
4answers
1k views

NoSQL and BIG DATA

I am doing an internship on Big Data technologies so I am new to this area. My question is about the use of NoSQL in the Big Data architecture. Do we need always to use a distributed storage (like ...
114
votes
13answers
42k views

Why use a database instead of just saving your data to disk?

Instead of a database I just serialize my data to JSON, saving and loading it to disk when necessary. All the data management is made on the program itself, which is faster AND easier than using SQL ...
5
votes
1answer
148 views

What is the common approach to component template databases?

My Project: I have employees who are required to go through a checklist when they encounter a duck, a cat, and a human. In our business, we have a set number of ducks, cats, and humans that come in ...
3
votes
2answers
1k views

Why is NoSQL better for this scenario?

Hypothetical scenario: Let's say we are downloading JSON from Facebook with details of a user's friend's checkins, posts, etc... These come in as one document per friend per activity, so with 8 ...
1
vote
1answer
191 views

Is Neo4j graph database sufficient to itself for all query types?

Neo4j eases relationship traversals => especially useful for a social network for instance. But are there any scenarios when it's advised to associate an additional relational database (or other ...
1
vote
1answer
538 views

NoSQL as file meta database

I am trying to implement a virtual file system structure in front of an object storage (Openstack). For availability reasons we initially chose Cassandra, however while designing file system data ...
2
votes
1answer
523 views

Is file system one of the NoSQL? What's the main difference?

I am confused about it. I can use lucene to create index and run query against file system. I can find any particular file very fast, if I can provide a primary key, in this case, directory path and ...
7
votes
3answers
3k views

NoSql databases - Decent tutorial/book that covers the concepts

Am looking for a good resource on learning the concepts behind NoSql databases. Most things I find are related to a specific technology (MongoDb, CouchDB etc) but I'm after all the concepts behind ...
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. ...
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 ...
0
votes
1answer
163 views

Recommendation for a database to query records with attributes that are arrays or hashes?

I'm building site with a very simple data structure: documents that are nodes that reference other nodes that each have arrays of parents, children and siblings, so the structure is: Node: uuid name ...
5
votes
1answer
959 views

Which NoSQL repository is most suitable for a Twitter-type architecture?

In an upcoming project I need to create a Twitter like web application where the basic idea is to read / write short messages and status updates (similar to tweets) and group these messages (just ...
4
votes
2answers
177 views

When and how much should we validate input when working with (C)AP storage?

Herein, we consider a server-client architecture. Suppose we keep the details flexible, but there's more than one layer of servers supporting our hypothetical service. The general question is "When ...
5
votes
3answers
2k views

Would a NoSQL DB be more efficient than a relational DB for storing JSON objects?

I am using a library that returns a JSON object (as a string, but I think that's standard), and I would like to store the contents of this object into a local database. I'm fairly fresh-faced in ...
9
votes
4answers
3k views

Are database schema migrations a problem in production environments?

In discussions about NoSQL vs SQL databases, I sometimes hear that companies prefer to use schemaless NoSQL databases because it is problematic to migrate the schema to a new version. But is that ...
5
votes
2answers
5k views

Why NoSQL over SQL? [duplicate]

Possible Duplicate: When would someone use MongoDB (or similar) over traditional RDMS? How well the SQL and NoSQL go head-to-head. I read somewhere that SQL databases are not well for data ...
2
votes
4answers
433 views

Job market-wise, are more and more companies moving to NoSQL? [closed]

I know NoSQL isn't nearly as mature, but it's been about a year or so since I've kept up with anything recent. Is it still "the future", are companies moving towards this, or are they still stuck in ...
1
vote
2answers
500 views

what is storing data in constant space?

"bloom filter allows us to store data in constant space" Can someone explain what exactly does that sentence means?
2
votes
6answers
1k views

what is the benefit of using key/value stores with respect to database sharding?

What has key/value stores got to do with making database sharding easier? Because if I do not use a key/value store, I can easily shard my database too right? (Like say, I can easily say users with ...
8
votes
5answers
2k views

Writing Web “server less” applications

TL;DR What are the prospects of writing applications which are completely based on a REST database server (CouchDB) and web applications which directly access the DB instead of having a web server in ...
2
votes
1answer
431 views

Active Record library with support for both SQL and NoSQL?

I'm looking for a PHP Active Record library that supports both SQL and NoSQL drivers (mongodb in particular). It doesn't matter if it actually has the NoSQL driver, I can write it myself, as long as ...
10
votes
4answers
2k views

Weaknesses with different types of NoSQL databases

Here's my question: What are the weaknesses with different types of NoSQL databases? Specifically, what're the weaknesses of key-value stores, graph data stores and document stores? I've had an easy ...
35
votes
5answers
22k views

When would someone use MongoDB (or similar) over traditional RDMS?

Im a bit confused......the whole NoSQL and such. When would you choose to use something like MongoDB over something like Oracle or MYSQL? I dont really understand....the "difference" as far as usage ...
8
votes
6answers
825 views

Learn a NoSQL or become a badass with traditional RDMS - Where is/will the work be? [closed]

New Question Version: I've got the opportunity to spend 3 months getting good at something, its going to be either a NoSQL technology like Cassandra or optimising relational database systems. I ...
20
votes
4answers
3k views

How do you decide what kind of database to use?

I really dislike the name "NoSQL", because it isn't very descriptive. It tells me what the databases aren't where I'm more interested in what the databases are. I really think that this category ...