redis nosql

Label:With the popularity of NoSQL, it is necessary to understand this new type of database. First, why should we choose NoSQL? There are two main reasons: first, the amount of data to be processed, or the efficiency of data access is very high, so the data must be placed on the cluster, and the second is to adopt a more convenient way of data interaction to improve the efficiency of application development

fast, extensible repositories for big data.Second, four categories of NoSQL databases1. Key value (Key-value) Storage DatabaseThis type of database primarily uses a hash table that has a specific key and a pointer to the specific data. The advantage of the Key/value model for IT systems is simplicity and ease of deployment. But if the DBA only queries or updates part of the value, Key/value becomes inefficient. For example: Tokyo cabinet/tyrant,

also used with virtual nodes. A virtual node is a relationship that establishes a layer of virtual mappings between data shards and managed servers.At present, people mainly based on the data model and access to the NOSQL classification.A few nosql solutions that are commonly usedThe size of a push redis system. Here are some of the problems encountered in the o

structure of the database is different from the other columns and the rigid structure of the SQL database, it is using a flexible graphical model, and can be extended to multiple servers. NoSQL databases do not have a standard query language (SQL), so database queries require a data model. Many NoSQL databases have rest-type data interfaces or query APIs. [2] such as: neo4j, Infogrid, Infinite Graph. There

Before you start IBM NoSQL Wire Listener for DB2 (hereinafter referred to as "Wired Listener") provides the following features: Enables developers to use the skills they acquire in the process of storing the JSON document in DB2. It also supports applications written using the MongoDB driver and applications written using the MongoDB command shell commands. Use the features provided by the DB2 JSON API to process Bson documents. Background inform

development time.2.Memcached and MySQL database data consistency issues.3.Memcached data hit rate is low or down, a lot of access directly through to the Db,mysql cannot be supported.4. Cross-room cache sync problem.Many NoSQL blossom, how to chooseIn recent years, the industry has been emerging many kinds of nosql products, so how to properly use these products, maximize their strengths, is that we need t

The preface has just written a comparison of three popular products in NoSQL, this time writing about some things about Redis, the introduction of Redis, installation and extension (Php-redis, because I am phper) installation and so on. It is also written to my friends (CCCJJJZ) as well as to my own later installation

NoSQL databases: data consistency, nosql Database ConsistencyNoSQL Database: Data ConsistencyRead consistency High ConsistencyAccess any node in the cluster at any time, and the data obtained is consistent; User consistency is consistent with the data obtained during cluster access for the same user;Solve user consistency: Use a sticky session to bind the session to a specific node for processing;This wi

the time, I later on the Internet access to more information, found that my understanding is only partial. (Even the author's understanding is wrong, such as the author of 2.1.5 The consistency of the simple understanding of the role of check constraints) in fact, the primary foreign KEY constraints, check constraints are the scope of database integrity (why is the integrity of the acid in the no longer?) I understand that because it only checks the check constraints on the data at the point at

, and understand the tradeoffs of each product , in the practical application to avoid weaknesses, in general, these nosql mainly used to solve the following several problems 1. A small amount of data storage, high-speed read and write access. This kind of product through the data all In-momery way to guarantee the high speed access, simultaneously provides the data to fall the function, actually this is redis