Databases that do not use SQL as their query language.

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3answers
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Storing n-gram data

(hopefully I landed on the right stack exchange site) I was hoping to brainstorm a little bit on the subject of storing n-gram data. In my project, I am trying to solve linguistic problems where I ...
2
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3answers
337 views

Is it sane to use Document based NoSQL for store big data tables

In Document based NoSQL to create tables (AFAIK) I need: Create such many as many rows in table documents with same ID field (that will be table id) and each time need to set the columns (for each ...
3
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1answer
176 views

What does it mean for an architectural style to be document-centric?

I heard it said that REST is "document-centric". Unclear what this meant, I began poking around and found the term document-oriented being used of databases, particularly NoSQL databases, and in ...
4
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1answer
408 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 ...
3
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2answers
965 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 ...
5
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3answers
456 views

Looking for a freeware NoSql key-value database to offload a Java HashMap [closed]

I have a Java HashMap with a String key and POJO value in a long-running application, and it's taking up a large chunk of memory (over 500mb, and this number is expected to grow - I'm guesstimating ...
0
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2answers
219 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 ...
2
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4answers
727 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?
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4answers
10k views

why are noSQL databases more scalable than SQL? [duplicate]

Recently I read a lot about noSQL DBMSs. I understand CAP theorem, ACID rules, BASE rules and the basic theory. But didn't find any resources on why is noSQL scalable more easily than RDBMS (e.g. in ...
4
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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 ...
5
votes
1answer
155 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 ...
1
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2answers
459 views

Why OTServs have an item cloning problem if the server crashes? [closed]

OTServs are open source MMORPGs with a huge community. Mostly all of them have a serious problem: if the server crashes, people can clone items. This is a dirty trick that can be executed because the ...
1
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1answer
2k views

Is map-reduce the basic factor that makes NoSQL more scalable than SQL?

I'm studying the differences between NoSQL and SQL, and what makes the first more scalable. I think I got the point, so I'll try to explain: Suppose an app has a list of billions of users, each with ...
4
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3answers
2k views

NoSQL Document Database as a Message Queue

I am considering using a NoSQL Document database as a messaging queue. Here is why: I want a client to post a message (some serialized object) to the server and not have to wait for a synchronous ...
1
vote
1answer
656 views

NoSQL (Azure Table Storage) RowKey design for ordered data

I store large quantities of GPS data in storage tables. Each partition can reach up to 1 million entities. Each GPS entity that is inserted into the table is actually sequential to the previous data ...
1
vote
2answers
162 views

Is NoSQL a good fit for a graphing app, and how can I compare different NoSql Servers?

I am traditionally a MsSQL or MySQL developer - I have been prototyping a new application that involves storing data from many targets. I have seen that the app appears to get slow after scaling to ...
1
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1answer
106 views

Azure Storage Table design with multiple query points

I have the following Azure Storage Table. PositionData table: PartitionKey: ClientID + VehicleID RowKey: GUID Properties: ClientID, VehicleID, DriverID, Date, GPSPosition Each vehicle will log ...
8
votes
3answers
669 views

NoSQL use cases [closed]

I am developing an application for my universities student research symposium around the idea of polyglot persistence. I have read Martin Fowlers book and done some other research online about the ...
3
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2answers
2k 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
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1answer
221 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
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1answer
636 views

Static Tables vs Dynamic Entity Attributes Storage Configurations

I am trying to figure out a better way to decide table storage configurations whether it will use static configurations using tables or dynamic configurations using EAV (entity-attribute-value) When ...
8
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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 ...
1
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1answer
631 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
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6answers
2k views

Dynamic Fields/Columns

What is the best way to allow for dynamic fields/database columns? For example, let's say we have a payroll system that allows a user to create unique salary structures for each employee. How ...
3
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1answer
650 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 ...
2
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1answer
754 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. ...
5
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2answers
725 views

How do document-oriented databases implement references?

In relational world we have Foreign Keys to reference other entities. But how do document-oriented databases like MongoDb, CouchDb, RavenDb implement references among entities? Update. StackExchange ...
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2answers
8k views

best practices for NoSQL database design

I have just started using a NoSQL document based database (MongoDB) and i'm curious about the best practices for designing databases. I presume the architecture should be different from relational ...
3
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1answer
518 views

How would one build a relational database on a key-value store, a-la Berkeley DB's SQL interface?

I've been checking out Berkeley DB and was impressed to find that it supported a SQL interface that is "nearly identical" to SQLite. ...
4
votes
2answers
359 views

Using HBase or Cassandra for a token server

I've been trying to figure out how to use HBase/Cassandra for a token system we're re-implementing. I can probably squeeze quite a lot more from MySQL, but it just seems it has come to clinging on to ...
3
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2answers
800 views

Considering JCR as a NoSQL solution?

I'm evaluating some NoSQL solutions for a project of mine and JCR popped up during my searches as a document store. But it seems somehow of an obscure niche which didn't have the impact its designers ...
3
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2answers
7k views

How to correctly design NoSql database schema? [closed]

I would like to learn something more about NoSQL databases, so I've chosen to create a new project from scratch to handle football results. In my traditional relational database, I have tournaments, ...
3
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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. ...
7
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3answers
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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 ...
0
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1answer
165 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
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1answer
1k views

Which NoSQL repository is most suitable for a Twitter-type architecture? [on hold]

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 ...
25
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8answers
5k views

Are NoSQL databases going to take the place of relational databases? Is SQL going away? [closed]

Does anyone have experience with NoSQL databases (CouchDB, MongoDB, Google's BigTable, Dynamo, Cassandra...)? What was it like? Was it actual production/on the job experience? What will happen to ...
7
votes
2answers
5k views

Can SQL Server and Mongo be used together?

We have a large news-oriented site that has high web traffic. The architecture is your often seen DB - Repo Layer - Services Layer - Asp.Net MVC. The problem that we've been seeing is around read ...
2
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1answer
275 views

Orthogonal design for product pricing and production planning with a NoSQL database

I am in the process of developing extensible software for the company I am working with for product pricing and production planning. The Present Scenario There are basically two types of products: ...
21
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4answers
4k 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 ...
5
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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 ...
4
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2answers
178 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 ...
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2answers
107 views

NoSQL Modify operations performance

I am working on the application which in near future (hopefully) will have to process tens or hundreds of thousands of items (item is currently one row in relational database table) per second. If I ...
2
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1answer
446 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 ...
8
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 ...
7
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 ...
1
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2answers
526 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
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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 ...
7
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3answers
5k views

Document Database versus Relational Database : how to choose?

I'm a SQL guy, but I know there is Not Only SQL databases - document-database mostly. As with most technologies there are pro and cons for each technology. I've read some articles, but they were too ...
10
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4answers
3k 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 ...