top nosql databases

Tags: read and write Data features Big Data NoSQL Database div High available implementation L databaseEasy to scale: NoSQL databases have a wide variety, but a common feature is the relationship-based nature of relational databases. there is no relationship between the data, which makes it very easy to scale u

New requirements for database in new application-Low latency under high concurrency for Read and write requests-Effective big data storage and access requirements (PB level)-High scalability and high availability-smaller administrative and operational costsLimitations of traditional relational databases-Due to the logical complexity of the relational database, a lot of deadlock or concurrency problems occur as the data size increases, which slows down

Thoughts on Cache Design Oceanbase-hundreds of billions of databases [Distributed System Engineering Implementation] distributed transactions Acid is a feature of standalone transactions, but in a distributed system, because the two machines cannot reach the same state in theory (refer to Fischer and other papers), we need to introduce a single point for coordination, this shows the famous two-phase lock protocol. The two-phase lock (two-phase c

As Web applications become increasingly complex, simple MySQL + Memcached seems to be unable to meet the needs of data storage. Some enterprises have switched to NoSQL solutions, such as MongoDB, CouchDB, TokyoCabinet/Tyrant, and Cassandra. In their opinion, if the data access mode is not very complex, SQL databases will not be used. However, DeNA chose the "only MySQL" solution and achieved far better perf

can only satisfy two at the same time.Base is the weak requirement that NoSQL databases typically have for usability and consistency: Basically availble--Basic available Soft-state-Soft state/flexible transaction. "Soft state" can be understood as "no connection", while "hard state" is "connection oriented" Eventual consistency-final consistency is ultimately the ultimate goal of ACID.

An interesting instance makes NoSQL injection no longer mysterious This article focuses on the security issues brought about by mongodb, and then introduces the injection of NoSQL by an interesting CTF instance.MongoDB can adapt to open-source databases for enterprises of all sizes and individuals. Targeting is an agile database. MongoDB data models can be flexib

Tags: high extensible col body Interactive size and case login popular1. What is NoSQL?2. Why do I need NoSQL?The Internet has undergone 1.0 and 2.0 development;Web1.0 is the early Sina, Yahoo, etc. can only browse, can not interact;The traditional relational database is unable to cope with the dynamic website of web2.0, exposing a lot of problems that are difficult to overcome.2.1 High concurrency and read

DBMemcachedbRedis You can quickly query to its value with key. In general, the format of the store regardless of the value of the full receipt. (Redis includes other features) Diagram Storage Neo4jFlockdb The best storage for graphical relationships. The use of traditional relational databases to address the performance of poor, and design use is not convenient. Object storage Db4oVersant The datab

Abstract: compared to traditional relational databases, NoSQL has more complex classifications-key values, document-oriented, column-based, and graph databases. Here's a list of NoSQL scenarios for various types and options for some well-known companies.In the past few years, relational

Label:In contrast to traditional relational databases, NoSQL has more complex classifications-key values, document-oriented, column-based, and graph databases. Here's a list of NoSQL scenarios for various types and options for some well-known companies.In the past few years, relational

Introduction: In the Web 2.0 era, NoSQL data stores (such as Bigtable and CouchDB) were mainstreamed from the edge because they were able to solve scalability problems and could solve the problem on a large scale. Google and Facebook are just two well-known companies that have started using NoSQL data storage, and we are still in the early stages of using NoSQL d

Background to the rise of NoSQL:1) The Rise of web2.0 (high interactivity), the traditional relational database in order to ensure the " universality " of the design has brought a complex function, high performance costs, and expensive problems.2) Avoid unnecessary complexity3) Higher throughput and high concurrency4) Ability to scale horizontally on commercial hardware5) NoSQL implementation of large table

NoSQL products are getting increasingly popular. NoSQL products are generally developed with high performance and high performance.ScalabilityHigh Fault Tolerance is everyone's praise. When we ask why NoSQL becomes popular, we may ask why these features become so important. We're re dealing with much more data. although advances in storage capacity and CPU spee

Tags: daily capacity large number of scene mode shopping cart economic bidding copy Dynamodb is a fully managed NoSQL database service. Customers can easily use Dynamodb's services. Enjoy high performance, massive scalability and persistent data protection at the same time. The Dynamodb database was published by Amazon on January 18, 2012.It incorporates Amazon's many years of experience in large, non-relational