A catch-all term describing database systems using various non-relational models. Such systems are usually engineered to be high-performance.

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12
votes
2answers
1k views

Schema-less/flexible + ACID Database?

I am looking at rewriting a VB based on-premise (locally installed) application (invoicing+inventory) as a web based Clojure application for small enterprise customers. I am intending this to be ...
1
vote
2answers
329 views

MySQL statement in Project Voldemort site

I've just entered Project Voldemort (a NoSQL key-value datastore) site, and saw something interesting: "Unlike MySQL replication, both reads and writes scale horizontally" Well, seems like ...
2
votes
1answer
481 views

Fastest key-value store for random disk reads?

I want a key-value store, with records stored on disk. (There are too many for memory.) I want to use a single machine. What key-value store will provide the fastest random reads (off disk)?
2
votes
1answer
867 views

Would elasticsearch or RavenDB be better for fueling a statistics engine/random forest?

(Note: this question exists on StackOverflow as well but I thought it might have a better reception here. If it proves this is the better place, I'll close/ask to migrate/link to this. Also, if it ...
18
votes
2answers
11k views

Timeseries: SQL or NoSQL?

I don't care about the general differences between SQL and NoSQL (or their traditional differences). I am currently looking at altering the storage of our internal time series. They all contain ...
13
votes
2answers
842 views

NoSQL and RDBMS together?

I was wondering if there are any good solutions for recording data in a NoSQL database and then converting them over to an RDBMS? For example, if you wanted to capture some data quickly, like ...
4
votes
3answers
1k views

Are there any in-memory NoSQL databases?

Given that NoSQL databases are designed to support horizontal scalability by throwing in more servers, are there any that are designed to do entirely without persistent disk storage? I'm looking at ...
7
votes
3answers
1k views

Can NoSQL databases cause occasional data loss?

I am currently evaluating databases to use for a new project, which will require insertion and querying of large amounts of trading data. Our team is leaning towards Cassandra, but then I read this ...
8
votes
3answers
2k views

Is NoSQL a replacement for traditional SQL, or an addition?

I've been reading up on NoSQL, but I can't figure out one thing. Is it meant to be a replacement for traditional SQL, or is it meant to be used in conjunction with it? Basically, what I'm asking (I ...
4
votes
3answers
540 views

Should I use MongoDB or a NoSQL solution at all for this?

I apologize if this belongs in web applications or something. I'm creating a web application that is sort of a similar concept to github. Basically I plan to allow someone to create a design of ...
5
votes
1answer
711 views

How to handle “reference tables” in CouchDB?

What's the best way to handle "reference tables", tables that contain static data, for example a list with various kinds of ingredients for food? Multiple documents, one for each ingredient One ...
1
vote
1answer
133 views

Document Design and Document IDs

I was wondering about specifying id's in CouchDB. For example: House - Rooms -- Kitchen -- Living room -- ... - Windows - Doors There are some documents, like "House", where there is and will only ...
8
votes
1answer
2k views

Amount of data per node in Neo4j

I need to store substantial amounts of data per node in Neo4j. The data is Unicode chunks of text. Actually not every node will have big chunks, but many of them will. I waded through the ...
7
votes
2answers
365 views

Is there any way to efficiently perform the equivalent of DENSE_RANK in MongoDB?

SQL Server and Oracle both have DENSE_RANK functions. Is there a way to do something similar in MongoDB without having to resort to MapReduce? In other words, suppose you have a T-SQL select clause ...
6
votes
1answer
715 views

Why can't we perform joins in a distributed database like Bigtable?

From this answer to What database does Google use?, BigTable is not a relational database. It does not support joins nor does it support rich SQL-like queries. Is this obvious? I do not ...
14
votes
3answers
7k views

What does horizontal scaling mean?

In database context, I have come across horizontal scalability as one of the advantages of the NOSQL databases. What does the term mean? http://en.wikipedia.org/wiki/CouchDB ...
4
votes
2answers
2k views

“phpMyAdmin” for Cassandra

Is there a tool like phpMyAdmin for RDBMS-MySQL for a Cassandra DB? I know that there is less "runtime" config possible (column families can not be edited at runtime etc.). Nevertheless, it would be ...
4
votes
1answer
765 views

What are your use-cases for HandlerSocket?

There's a bit of hype around: HandlerSocket It seems like faster, nosql access to MySQL data is becoming more desirable. Percona Server is now shipping with HandlerSocket built in. My question is, ...
2
votes
1answer
547 views

Which NoSQL database(s) should be used for advertising platform? [closed]

What NoSQL database or combination of databases best meets these criteria? Very fast writes and reads Persistent data that won't get lost in a crash Plays nice with PHP Works well in the cloud (EC2) ...
38
votes
5answers
58k views

What is a Key/Value store database?

I've been looking at the wikipedia page for NoSQL and it lists several variations on the Key/Value store database, but I can't find any details on what it means by Key/Value store in this context. ...
9
votes
2answers
539 views

What are some good resources for learning about document oriented databases?

I'm interested in learning about NoSQL databases and I decided to start with document oriented databases. What are some good resources to learn the concepts and good design of this type of database?
17
votes
2answers
1k views

CouchDB vs MongoDB [closed]

Evaluating document-oriented storage, what are the pros and cons of CouchDB vs MongoDB?
55
votes
6answers
19k views

What are the differences between NoSQL and a traditional RDBMS?

What are the differences between NoSQL and a traditional RDBMS? Over the last few months, NoSQL has been frequently mentioned in the technical news. What are its most significant features relative to ...