What is NoSQL, how does it work, and what benefits does it provide?
NoSQL database systems are often highly optimized for retrieval and appending operations and often offer little functionality beyond record storage (e.g. key-value stores). The reduced run-time flexibility compared to full SQL systems is compensated by marked gains in scalability and performance for certain data models.
database - What exactly is NoSQL? - Stack Overflow
NoSQL is the acronym for Not Only SQL. The basic qualities of NoSQL databases are schemaless, distributed and horizontally scalable on commodity hardware. The NoSQL databases offers variety of functions to solve various problems with variety of data types, where “blob” used to be the only data type in RDBMS to store unstructured data.
Why NoSQL is better at "scaling out" than RDBMS?
NoSQL solutions usually offer record-level atomicity, but cannot guarantee a series of operations will succeed (transaction). It comes down to: to keep data integrity and support transactions, a multi-server RDBMS would need to have a fast backend communication channel to synchronize all possible transactions and writes, while preventing ...
nosql - Practical example for each type of database (real cases ...
2013年8月13日 · NoSQL products support a whole range of new data types, and this is a major area of innovation in NoSQL. We have: column-oriented, graph, advanced data structures, document-oriented, and key-value. Complex objects can be easily stored without a lot of mapping.
mongodb - When should I use a NoSQL database instead of a …
2010年9月15日 · NoSQL is a database system where data is organized into the document (MongoDB), key-value pair (MemCache, Redis), and graph structure form(Neo4J). Maybe there are possible questions and answer for "When to go for NoSQL":
nosql - Eventual consistency in plain English - Stack Overflow
The reason why so many NoSQL systems have eventual consistency is that virtually all of them are designed to be distributed, and with fully distributed systems there is super-linear overhead to maintaining strict consistency (meaning you can only scale so far before things start to slow down, and when they do you need to throw exponentially ...
NoSql and Data-Warehouse - Stack Overflow
2010年4月21日 · NoSQL solutions usually manage relatively limited schemas with large cardinality in few entities, while data warehouses typically have lots of facts and dimensions (in a dimensional model) or lots of entities in a 3NF model.
How do you track record relations in NoSQL? - Stack Overflow
In NoSQL, you don't design your database based on the relationships between data entities. You design your database based on the queries you will run against it. Use the same criteria you would use to denormalize a relational database: if it's more important for data to have cohesion (think of values in a comma-separated list instead of a ...
How to Draw UML Diagram for NoSql Like MongoDB? [duplicate]
NoSQL databases approach modelling from a different point of view generally. NoSQL modelling usually begins with asking questions on how the data in the database is going to be queried, so the main modelling is 'what are the list of questions that I want to ask of my database', whereas with SQL databases, modelling usually is a function of what ...
SQL versus noSQL (speed) - Stack Overflow
People who tend to use noSQL use it specifically because it fits their use cases. Being divorced from normal RDBMS table relationships and constraints, as well as ACID-ity of data, it's very easy to make it run a lot faster. Consider Twitter, which uses NoSQL because a user only does very limited things on site, or one exactly - tweet.