disadvantages of nosql

about a year ago I heard of NoSQL, surfing the internet to check, feel their foundation is poor, not to study these when (in fact, is lazy), now work two years, the foundation is still weak, think should assiduous learn something, so download the "NoSQL Getting started with databases. Open a PDF, habitually look at how many pages of this book (Haha, or lazy, if good hundreds of page estimate and no confiden

pros and cons, and choosing a more appropriate system to meet the needs of the business as much as possible. There may be times when there is a need to sacrifice a handful of business needs in exchange for a more systematic development rather than the entire selection to preserve the needs of certain extreme scenarios.SummaryData storage software Diversification trends unstoppable, whether it is the traditional leader of Oracle, or open source model of MySQL, as well as

Comparison of the advantages and disadvantages of several mainstream PHP frameworks, and comparison of the advantages and disadvantages of the php framework PHP is a popular open-source server-side scripting language at home and abroad. It can meet the development needs of large, medium and small projects. We will introduce several mainstream PHP frameworks and their advantages and

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 volum

Comparison of the advantages and disadvantages of several mainstream PHP frameworks, and comparison of the advantages and disadvantages of the php framework. Comparison of the advantages and disadvantages of several mainstream PHP frameworks. Comparison of the advantages and disadvantages of the php Framework PHP is a

Detailed explanation of AJAX working principles and advantages and disadvantages, and the advantages and disadvantages of ajax Working Principles AJAX is a technology used to create fast dynamic web pages. By performing a small amount of data exchange with the server in the background, AJAX can implement asynchronous updates on webpages. This means that you can update a part of a webpage without reloading t

Comparison of advantages and disadvantages of js object creation methods, and advantages and disadvantages of js object Creation Several Methods for comparing object creation in js 1. Factory Model function createObj(name, sex){ var obj = new Object(); obj.name = name; obj.sex = sex; obj.sayName = function(){ alert(this.name); } return obj; }var person = createObj('Tom', 'man');

Comment[] ...... 0 “...” [{"id" =1, "content" = "NoSQL reverse mode is Good article"}, {"id" =2, "content" = "yes"} ...] ...... Such designs can take advantage of the benefits of inline and map them to the relational model. It is necessary to manually maintain comment_id to ensure its global uniqueness. Anti-mode four: Online computing Symptom (s): There are some long-running query, and the index cannot

data can be written to a node as soon as possible without being delayed by the network transmission. The disadvantage is that consistency is not always guaranteed, and a small amount of data may be lost in the event of a failure. The RDBMS adheres to the acid principle, and NoSQL has the base principle , which conforms to the CP in the CAP, which conforms to the AP in the CAP (that is, the former sacrifices availability, the latter sacrifices con

Three-way handshake and http protocol advantages and disadvantages, TCP advantages and disadvantages The interaction between the client and the server is divided into the application layer-Transport Layer-network layer-link layer. The client sends data through the application layer-Transport Layer-network layer-link layer. When the data arrives at the server side, the received data is received from the l

Label:The disadvantages of relational databases: with the rise of Internet web2.0 Web site, the traditional relational database in dealing with web2.0 website, especially the super-large-scale and high-concurrency SNS type web2.0 pure dynamic website has appeared to be inadequate, exposing a lot of difficult problems to overcome , For example: 1. High performance-the need for higher database concurrency and read/write web2.0 Web site based on user per

Three methods and advantages and disadvantages of image pre-loading, three advantages and disadvantages Pre-loading images is a good way to improve user experience. When images are pre-loaded into the browser, visitors can smoothly surf your website and enjoy extremely fast loading. This is very advantageous for websites with a large proportion of image galleries and images. It ensures fast and seamless pub

Advantages and disadvantages of Several implementation methods of the singleton mode in Python, and advantages and disadvantages of pythonSingleton Mode Singleton Pattern)Is a commonly used software design model, the main purpose of this model is to ensureA class only has one instance.. When you want to create only one instance for a class in the system, the single-instance object can be used. For example,

Analysis of Ajax principles and advantages and disadvantages, analysis of ajax advantages and disadvantages 1. Background of ajax technology It is undeniable that the popularity of ajax technologies has benefited from the vigorous promotion of google. It is precisely because google earth, google suggest, gmail, and other widely used ajax technologies that have given rise to the popularity of ajax. Microsoft

HTML5 enable the mobile phone scanning function and advantages and disadvantages, html5 mobile phone scanning advantages and disadvantages 1. Solved problems: 1. The Weibo client can call a camera to scan the QR code and parse it; 2. Scan and parse the QR code in the native browser and client; 2. Advantages: The web client or h5 client can directly scan the Code; 3. Dis