top 10 nosql databases

A relational database (RDBMS) has been a mainstream database model for over One-fourth centuries. But now the relational database, "cloud" or "NoSQL" database, is gaining more and more occupancy as an alternative database model. In this article we will focus on the 10 key features of the NoSQL database: The advantages of the top 5 and the top 5 challenges. Tip: C

storage (disk space) is negligible. While non-relational data is stored in a flat dataset, data can often be duplicated. A single database is rarely separated, but stored as a whole, so that it is easier to read and write for the whole piece of data. Vertical Expansion vs Horizontal expansion The biggest difference between SQL and NoSQL databases may be in scaling, and of course scaling up to support the g

Michael Kopp has more than 10 years of architecture and development experience in C ++ and Java/Jee. He is now a compuware technology strategist who specializes in the architecture and performance of large-scale product deployment. The following is a translation: Traditional enterprise database vendors often propose that nosql lacks professional monitoring and management tools. Their arguments are: ente

cache layer with their web schemas, their applications improve performance while significantly reducing the load on the database.memcached processing atoms is every key/value pair, key will be converted to hash-key through a hash algorithm, easy to find, compare and do as possible hash. At the same time, Memcached uses a two-level hash, which is maintained by a large hash table.9, FirebirdMemcachedFirebird is a relational database that can be run on linux,windows and various Unix platforms, Fir

tolerance. The main practice of de-centering is to use a well-designed infection protocol [7], which is relatively simple, but provides good convergence time, and can tolerate any node failure and network isolation. Although there are many types of infection algorithms, we only focus on the anti-entropy protocol because NoSQL databases are using it.The inverse entropy protocol assumes that synchronization

models. For the following information, see the Emil Eifrem blog and NoSQL database description. Document Database Inheritance: inspired by Lotus Notes. Data Model: document summary, including key-value summary. Instance: CouchDB, MongoDB Advantages: Data Modeling is natural, programmers are easy to use, the development process is short, the webpage mode is compatible, and CRUD (short for adding, querying, updating, and deleting) is easy to achieve ).

Although the 09 appeared a more radical article "Relational database is dead", but we all know that the relational database is actually alive and well, you can not use the relational database. But it also illustrates the fact that the relational database has a bottleneck when it comes to processing WEB2.0 data.So are we using NoSQL or relational databases? I don't think we need to have an absolute answer. W

database engine with no external dependencies, used as an embedded database on iphones, Firefox browsers and Skype, is widely used in devices like the iphone, It can also be deployed in desktop software such as Skype and Firefox. No configuration and management of the entire database is saved on a single disk file, growing to the widest range of languages supported by 7TB in Top 10 9 . Cassandra First release : 2008 Licensing mechanism : Open source

The difference between NoSQL and NoSQL is much greater than the difference between different SQL databases. Therefore, software architects must select a suitable NoSQL from the very beginning of the project. The difference between NoSQL and

adapt to the document database than other models, except for graph database [NOTE 1]. Obviously, graph database implements most of the common performance of a graph. In addition to the SQL field, I always recommend that you and your team do not underestimate the fact that you and your team are losing most of the tested tools and expertise that you are unconsciously using every day. I have seen a lot of people extract very basic information from the NoSQL