blockchain advantages and disadvantages

Hello everyone, today to share with you the pros and cons of free space problem. Now a lot of domain name business host space vendors in vigorously promote the free things. So how much do you know about the free stuff? Everyone knows you can get it without money. But you only see the surface, do not see the inner side, think about it, the General people will give you free of what the concept, others can not lose money to you on the free throw, for you to use it. Once heard an old-timer said a wo

Front-End time to write a "use of CSS framework for efficient site development", a lot of friends asked me related questions. Very early 5key in the company for the framework of CSS frameworks, but also to many friends of the proposed CSS framework. The effect is very obvious. Of course, the CSS framework has advantages and disadvantages, and recently read some related articles. Some thoughts, share with yo

When formatting a disk in Windows, you can see options such as FAT, FAT32, and NTFS in the options of the file system, when formatting a USB flash drive or other mobile storage devices, the exFAT option is displayed. What are the four disk formats and their advantages and disadvantages? When formatting a disk in Windows, you can see options such as "FAT", "FAT32", and "NTFS" in the options of the file syste

When formatting a disk in Windows, you can see options such as "fat", "FAT32", and "NTFS" in the options of the file system, when formatting a USB flash drive or other mobile storage devices, the "exfat" option is displayed. What do these four disk formats mean and what are their advantages and disadvantages? What should we choose? The following is a detailed introduction. Before introducing the difference

NOTE: For the following content, refer to Chapter 6 of "building a high-availability Linux Server" of fuqin liquor. It is relatively simple to set up a high-availability server Load balancer environment, mainly to understand the principle. This article describes the advantages and disadvantages of the three load balancers so that they can be selected as needed in actual production applications. Currently, t

to the session problem of a method, suggest concern; ⑤ri, representing the url_hash of the Nginx, according to the requested URI; ⑥rl_param, representing the URL parameter ' balance Url_param ' requires an URL parameter name according to the request; ⑦HDR (name), which indicates that each HTTP request is locked according to the HTTP request header; ⑧rdp-cookie (name), which indicates that each TCP request is locked and hashed according to a cookie (name).

It is relatively simple to build a load-balanced high availability environment, mainly to understand the principle. This article describes the advantages and disadvantages of three load balancers, so as to be in the actual production applications, according to the requirements of choice.At present, the online environment in the application of more load Balancer hardware F5 big-ip, software has Lvs,nginx and

Transfer from http://tianzongqi.iteye.com/blog/1458002Advantages and disadvantages of XML configuration: Advantages: The XML configuration approach further reduces coupling, making the application easier to scale, even if the configuration file is further modified and does not require engineering modification and recompilation. The XML configuration should be better when dealing with large

Excerpt from: ExtJS features, advantages and disadvantages and precautions1. What is ExtJS?ExtJS can be used to develop the RIA and rich client Ajax applications, is written in JavaScript, mainly for the creation of the front-end user interface, is a background technology-independent front-end AJAX framework. As a result, ExtJS can be used in applications such as. Net, Java, PHP, and many other development

1. Some time ago, I translated an article titled changing your website from MySQL to PostgreSQL. in fact, I was more interested in the specific operation of converting the background database of an application from MySQL to PostgreSQL, and did not care about the advantages and disadvantages of MySQL and PostgreSQL. I did not expect an unexpected response, therefore, I feel that I have written this article.

The typical Ldo power supply itself consumes (vin-vout) *iout, so the larger the two, the greater the power consumption and the lower the efficiency.LDO, switching power supply DC's advantages and disadvantages (2008-11-06-22:40:23) Reprint Tags: power supply talk low dropout linear regulator, so the name thought, for linear regulator, can only be used in buck applications. That is, the output voltage must

Now the trend is multi-language blending programming, so this article is for mixed programming. 1,c++ Advantages: 1.1, performance advantages. 1.2, evolutionary (reusable), evolving the team's convenient class library. 2,c++ a small advantage or suspected advantage: 2.1, "Snake Balm". In the era of mixed programming, the value of "Snake Balm" is small. 3,c++ Fundamental

Singleton mode: A singleton pattern means that there is only one instance. The singleton pattern ensures that a class has only one instance, and instantiates it and supplies the instance to the entire system. This class is called a single instance class. The single case model has three kinds: the lazy type single case, the A Hungry man type single case, the registration type single case. 1. The lazy type single case Advantage: The first call is initialized to avoid a waste of memory. Disadvan

The advantages offered by Oracle Resilient Cloud and data warehousing are obvious, first of all, that a single vendor provides all the underlying components: Oracle's one-stop approach helps simplify licensing, support, upgrades, and consolidation, all handled by a single vendor. This may help to prevent the frequent prevarication between vendors on technical issues. It is easier to configure, upgrade, and consolidate with a single vendor, simplifying

Advantages and disadvantages of MyBatis After using the MyBatis framework, compared to the previous Hibernate framework, the individual felt mybatis the advantages of a lot of, at least more simple than hibernate easy to use. Separation of SQL statements from codeBenefits: Easy to manage and maintainDisadvantage: Not easy to debug, need to use log tool to get in

A Disadvantages: 1. Portability is the biggest drawback of stored procedures and triggers. 2, occupy the server side too many resources, to the server caused a lot of pressure 3, can not do DDL. 4, the trigger scheduling error is difficult, and the data is easily inconsistent, late maintenance inconvenient. Advantages: 1, precompiled, has been optimized, high efficiency. Avoids the inefficiency of SQL st

with transaction semantics in bean code. In both cases, the container manages the transaction and determines whether the given transaction should be committed. 5, based on the components of the design. Entity beans are designed to contain components that are configured with deployment descriptors and can be deployed to any Java EE application Server without changing any code. In summary, the advantage of entity beans is that they can benefit from standardization and industry best practices, s

Summary of advantages and disadvantages of ORACLE five tables:1, Normal table (heap table): Suitable for most design scenarios, there are advantages and disadvantages.Advantages:A, the syntax is simple and convenientb, suitable for most scenesDisadvantages:A, the update log cost is largeB,delete Cannot free space (HWM high water mark does not drop)C, table record

This article focuses on the details of Ajax, the origin of Ajax, the principle of Ajax, and the advantages and disadvantages of Ajax. Now let's see this article together. What is Ajax In fact, Ajax already belongs to the old technology, and now almost no one will use, here is mainly the bottom of the things to share with you, in case of loading the interviewer. Ajax, "Asynchronous JavaScript and XML" (Async

version determines the stability of the RAC operation. It is important for database engineers and hardware engineers to have extensive environmental checks, validations, and extensive testing after deployment before installing the configuration.　　Second, high-performanceHigh performance is also a major headache for migrating from a single machine environment to a RAC environment, and RAC is not a high-performance solution. In the current hardware environment of gigabit Network, many times the s