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.

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 ...

2018年10月29日 · Traditionally, NoSQL was used for unstructured high volumes like logging results, website search data etc. However, with professionals becoming more comfortable with document storage and relational capabilities improved over time, NoSQL is often favoured over traditional relational databases.

2014年5月7日 · Data scaling - SQL works best when all the data fits on one server (up to a few TB). The reason a lot of NoSQL stores don't have join is that they were designed not to require all the objects to be on one server. Performance scaling - NoSQL stores do tend to be faster at handling high traffic, but not necessarily by enough to matter.

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.

2011年6月22日 · Re choosing NoSQL - see nosql-database.org. Re recommending MongoDB - you should first choose the TYPE of NoSQL to use, then select a product from that type. No real reason to recommend one DB over another without real understanding of BL and infrastructure. –

2013年9月16日 · While storing images in relational database has never been recommended, I was wondering if it is a suitable approach to store and manage image files in NoSQL databases. I would appreciate if you could share your experience in details here. (i.e. what NoSQL database did you use? it's advantages and disadvantages in this case, etc) Thanks

2010年4月23日 · with MongoDB (and I assume other NoSQL database APIs worth their salt) the ways of querying the database are much more simplistic than SQL. There is no tedious SQL queries to generate and such. For instance take this from mongodb-csharp: using MongoDB.Driver; Mongo db = new Mongo(); db.Connect(); //Connect to localhost on the …

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":

2019年4月19日 · "NoSQL" is a buzzword describing a diverse collection of database systems that focus on "semi-structured" data (that do not fit well into a tabular representation), sharding, and high concurrency at the expense of transactional integrity and consistency, the latter being among the basic tenets of relational database management systems (RDBMS).