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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7
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1answer
1k 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 ...
6
votes
2answers
259 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
570 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 ...
12
votes
3answers
5k 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
621 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
485 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) ...
34
votes
5answers
36k 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
442 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
974 views

CouchDB vs MongoDB [closed]

Evaluating document-oriented storage, what are the pros and cons of CouchDB vs MongoDB?
48
votes
5answers
12k 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 ...