nosql database advantages

relational databaseAdvantage:1. Good at handling small data volumes2. Good at complex SQL operations, can make complex queries such as joins3. Can easily generate a variety of data objects, the use of stored data to build forms and reports, the visibility of goodDisadvantage:1. It is difficult to write processing for distributed applications and large amounts of data2. Indexing and structural changes to tables with data updates3. Application with Field not fixed4. Handling of Quick return result

-dimensional table databases:1. Analysis of data is of that type2. Store the main table data and get the return ID3. Branch, plus the primary table ID in different cases to the lava or Creeper table to store data4. Open loop, insert multiple records into the Inveneory tableThis is just a brief, but also consider the multiple table operations when the data rollback problem, actually write about 30 lines, then the error may be greatly improved.For NoSQL

Key-Value Store databaseTemporary: as memcached. The temporary key-value database stores the data in memory, which in two cases results in the loss of data, the first is the power outage, but the data content exceeds the memory size. The benefits of this treatment are very fast.Permanent type: such as Tokyo Tyrant, flare and RomaThe two are both types: Redis. Redis first data in memory, and then meet certain conditions (the default is 15 minutes more

amount of data stored, with the memory size of the machine itself. Although Redis itself has a key expiration policy, it still needs to anticipate and conserve memory in advance. If the memory grows too fast, you need to delete the data periodically. 4.Redis Application Scenario: Best practices: Applications where data changes quickly and database sizes are met (for memory capacity). For example: Weibo, data analysis, real-time data collection, real-

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 up large data volumes, high performance:

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

Tags: relational data table NoSQL database L database Combat div operation Field Why NoSQL is produced: The fact that relational databases are not good at doing so is the reason why NoSQL is Born: Large number of data write operationsThe book is written "la

In-depth analysis of NoSQL database distributed algorithms (graphic details), nosql text Although the NoSQL movement has not brought about fundamental technological changes to distributed data processing, it still triggers overwhelming research and practices on various protocols and algorithms. In this article, I will

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. I

database is better suited to the case where data is organized through relationships, and a dedicated text search system is better suited to situations where real-time search is required.Here, let's look at the main advantages and differentiation features of the SQL system:* SQL enables interactivity. SQL is a declarative query language. Users say what they want (for example, to show the location of the top

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 consi

way, NoSQL comes into being.Second, the definition of NoSQLNoSQL (nosql= not-only sql), meaning "not just SQL," is a new revolutionary movement in the database. NoSQL advocates are advocating the use of non-relational data storage. Most database technologies are not guarant

way, NoSQL comes into being.Second, the definition of NoSQLNoSQL (nosql= not-only sql), meaning "not just SQL," is a new revolutionary movement in the database. NoSQL advocates are advocating the use of non-relational data storage. Most database technologies are not guarant

Advantages and disadvantages of relational databaseAdvantages: Can do transaction processing, so as to ensure the consistency of data; Can be a join, such as multi-table query; Because of SQL standardization, the cost of data updates is small (the same fields are basically only one place). Disadvantages: The write processing of large amount of data is not easy; If the table data volume is too large, it is not easy to do index or

(requires complex technology to achieve), large data under IO pressure, table structure changes difficult, is the current use of MySQL developers face problems. Advantages of NoSQL Easy to expand There are a variety of NoSQL databases, but a common feature is to remove the relational characteristics of relational databases. There is no relationship between th

Label:In the past, we only needed to learn and use a database technology to do almost all of the database application development. Because the mature and stable relational database products are not many, and for you to choose the free version is even less, so the Internet domain basically chose the free MySQL database.

Redis database of NoSQL Database: Redis introduction and installation and deployment, nosqlredisZookeeper NoSQL (NoSQL = Not Only SQL) refers to non-relational databases. With the rise of Internet Web websites, traditional relational databases are dealing with Web websites,

using duplicate data, which is also in the inner and exterior of the reference in the inline field. This can combine the performance advantages of inline and reference. The disadvantage is that data duplication, maintenance will be more cumbersome. Problem two infinite expansion of inline symptoms: The List,map type's inline fields are expanding and there is no limit. Just like the previous mentioned blog's inline field comment. If there is no limit

Tags: and EXT structure Publishing NAT process name Data Model operationsThe SQL (Structured Query Language) database is the primary way to store data over the past 40 years. The late 1990s with the rise of Web applications and open-source databases such as MySQL, PostgreSQL, and SQLite, the explosion of user growth. NoSQL databases have been in existence since the 1960s and have gained more attention until

Tags: using os data problem ardiv work time Introduction to the NoSQL Database Chapter 1th Basics of NoSQL Databases 11.1 relational and NoSQL databases 21.1.1 What is a brief history of NoSQL 21.1.2 relational database 21.1.3