nosql advantages and disadvantages

It is a gradual process to collect my own understanding of MongoDB's advantages and disadvantages, or to reference or extract from other reliable online files, it also expands with my understanding of MongoDB. (1) MongoDB limitations 1. Uneven data distribution in cluster shards 2. Relatively Poor standalone Reliability 3. Large data volumes continue to be inserted, and the Write Performance fluctuates

(1) circuit switching: Before communication, a physical channel exclusive to both parties must be established between the two parties (composed of the switching devices and links of both parties ), therefore, it has the following advantages and disadvantages. Advantages: ① Because the communication line is dedicated to users of both parties, the data transmission

"Abstract" Linux User Configuration device-driven development: Not all device drivers are written in the kernel, and in some cases, writing drivers in user space can better address the problems encountered. This paper analyzes the advantages and disadvantages of user-driven drivers.1. Advantages of User space driver1, can be linked with the entire C library.2, in

The advantages of Ajax The advantages that Ajax brings to us are basically deeply appreciated, and here I just briefly say a few things: 1, the biggest point is the page does not refresh, in the page with the server communication, to the user experience is very good. 2, the use of asynchronous way to communicate with the server, do not need to interrupt the user's operation, with more rapid response capa

performance requirements are high, programmers may be required to replace them with other similar algorithms to ensure performance is preferred, but in some cases, replacing recursion with other algorithms may not necessarily improve the performance of the algorithm, but recursion is the best algorithm (which generally refers to fewer recursive hierarchies).In short, the use of recursion has its advantages, there are

This blog is reproduced from a blog post, introduced Gan (generative adversarial Networks) that is the principle of generative warfare network and Gan's advantages and disadvantages of analysis and the development of GAN Network research. Here is the content. 1. Build Model 1.1 Overview Machine learning methods can be divided into generation methods (generative approach) and discriminant methods (discrimin

these kinds of frameworks, we usually use a lot of ways to create the XMLHttpRequest object ourselves, this way is more flexible than the previous several frameworks. In addition, here also mention aspnet2.0 of the asynchronous callback interface, it and Ajax can also achieve local no refresh, but its implementation is actually based on the XMLHttpRequest object, but also only support IE, of course, this is a Microsoft competition strategy. 9.ajax Application Examples The above content is rep

advantages and disadvantages of sequential tables and linked list storage 1. Sequential table Storage Principle: Sequential table storage is to put data elements into a contiguous memory storage space, access efficiency, fast. But you can't increase the length dynamically. Advantages: Efficient access, direct storage via subscript Cons: 1. Insertions and dele

Label: Why do you want to create an index? This is because creating an index can greatly improve the performance of the system.First, by creating a unique index. To ensure that each row of unique data is in a database table.Second, high-speed data retrieval can be greatly accelerated, which is the most basic reason to create an index.Third. This is particularly relevant in terms of achieving the data's textual integrity.The same can significantly reduce the time of grouping and sorting in querie

The full duplex of a switch means that the switch can receive data while sending data. It cannot directly connect the input/output ports with different rates and is prone to packet loss, in particular, it supports switching between ports at different speeds to ensure collaboration between high-speed ports and low-speed ports. With the gradual development of network applications, telecom-grade switches, especially layer-3 switches, have become the focus of competition in today's market. However,

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 disadvantages in this article and share them with you as a reference. The main reference of ph php is a popular open-source server-side scripting language at home and abroad. It can

I. Ordinary table (Heap table): For most design scenarios, there are advantages and disadvantages. Advantages:1. Simple and convenient grammar2. Suitable for most scenes Disadvantages:1. Update log cost is large2.Delete Unable to free space (HWM high Water mark does not fall)3. Table record too large retrieval too sl

using the GUID master key:1, storage space is large (in bytes), so it will take up more disk size.2, difficult to remember. Join operation performance is lower than Int.3. There is no built-in function to get the newly generated GUID primary key.4. The GUID master key will be added to the other indexes on the table, thus reducing performance.Summarize:The advantages and disadvantages of the GUID and int tw

-server data merging is very convenient.Disadvantages of using the GUID master key:1, storage space is large (in bytes), so it will take up more disk size.2, difficult to remember. Join operation performance is lower than Int.3. There is no built-in function to get the newly generated GUID primary key.4. The GUID master key will be added to the other indexes on the table, thus reducing performance.Summarize:The advantages and

The most recent internet speculation has been the hottest, and basically now the internet giants have their own open platform. The major search engines, too, have withdrawn from their own open models and standards. This article for you to introduce the current several mainstream commodity search (search engine for E-commerce open to a model). I am engaged in an E-commerce site to promote the site, since the shopping search, the boss asked us to join these search engine products included! So we w

Some CPUs are already integrated graphics in the inside, before buying can understand the integration of the graphics card in the inside, according to their own needs to buy. Below I tell you a simple introduction of the advantages and disadvantages of integrated graphics. Method/Step 1, here first to say that the 1th, some motherboards are not supported to install independent graphics, which

better than an array:1. Insert and delete operations. If an element is inserted in the middle of an array, the memory address of all the elements behind the element will be moved backwards. The same is true of the deletion. Only when the last element of the data is inserted and deleted. . The list only needs to change the node information within the node that is necessary to change it. You do not need to change the memory address of the node.2. Memory address utilization. No matter how much spa

application-layer language (bottom-level is C/S, WINAPI, COM Ole VB, DirectX, or a custom library on a mono project), and . NET -based IL CLR Runtime Libraries, and application sets, the application domain is a great innovation for application compilation and application composition Systems , but the pros also bring drawbacks. Low-level or real-time high-performance applications that are difficult to replace c/c++,windows platforms other than the development of applications also need to cont

any time, do not require the developer to do the precise processing, so, excessive use of the session variable will cause the code unreadable and poorly maintained.Although "You can use the session variable directly at any time you want to use it, rather than declaring it in advance, this approach is similar to the use of variables in VB." After you have finished using it, you do not have to consider releasing it, as it will automatically release ". But, "who" thinks of it? What does the variab

: This article mainly introduces (summary) the advantages and disadvantages of NginxLVSHAProxy server load balancer software. For more information about PHP tutorials, see. PS: Nginx/LVS/HAProxy is currently the most widely used three load balancing software. I have implemented these software in multiple projects. I have referenced some materials and combined some of my experience in using it, to sum up. G