1. There are three main categories of cloud computing: private cloud, public cloud, and hybrid cloud; there are three main levels of cloud computing services: IAAS, PAAS, and SAAS. 2. The IaaS layer is the core and most basic part of the private cloud, and it is also the first part that enterprise IT cloudization should start with. Cloudification not only solves the self-service and automatic delivery of computing, storage and other resources, but also solves the problems of resource pool separation, complex maintenance, and inability to elastically expand caused by traditional architecture. 3. Hyper-convergence and private cloud are not substitutes. On the contrary, hyper-convergence products allow the IaaS layer to truly possess distributed architecture and software.

The server is the foundation of the website, and the smooth operation of the website cannot be separated from the server. However, many webmasters will encounter the situation of changing the server. Sometimes the space expires, or the existing traffic and space cannot meet the needs and the server needs to be replaced. However, changing the server will affect the website to some extent. So, what are the impacts of changing the server of a website? The spider will cache the IP address pointed to by the domain name. In order for the spider to access quickly and save server response time, it will cache data for each domain name. If we change the IP address, Search engine spiders are still using cached IP addresses for access.

The difference between WEB server and application server: 1. WEB server: To understand WEB server, we must first understand what is WEB? WEB can be simply understood as the HTML page we see is the data element of WEB, and the application software that processes these data elements is Called WEB server, such as IIS, apache. The WEB server deals with the client, and the main information it processes is: session, request, response, HTML, JS, CS, etc. 2. Application server: Application server, such as JSP, processes

Currently, GPU servers are mainly used in different scenarios such as scientific computing and video encoding and decoding. It can provide applications with extraordinary accelerated computing capabilities and can offload application computing-intensive workloads to the GPU. From a user perspective, applications run significantly faster. Its fast and stable computing capabilities are deeply recognized by users. When users choose a GPU server, they first need to consider the business needs and match the appropriate GPU model. For example, in HPC high-performance computing, the choice needs to be based on accuracy. If the P40 or P4 model is used, it is not very suitable.

How to do server defense? Server security is very important. For operation and maintenance managers, doing a good job in server security defense can save operation and maintenance personnel a lot of trouble. So what should we do?

The ping value of the network, that is, the time value, reflects the time required for the entire process of sending a request from the local machine to the remote server. After the remote server receives the request, it returns a confirmation signal to the local machine. The unit is ms. The larger the time, the longer the time and the slower the network speed. This transmission speed is not only related to the network quality of the remote server, but also related to the quality of the local network where the test is conducted. If there is a local network problem or the machine is poisoned or the resource usage is too high, even though the remote server network is normal, ping will still be abnormal. Therefore, if

Simply put, Pagoda is a WEB server suite that integrates software tools commonly used in web services such as Apache, MySQL, PHP, and Nginx. It is a popular WEB server panel. To put it simply, it is to facilitate the operation and maintenance of your website. Before using the Pagoda panel, I built the website like this: Use remote connection software such as xshell to connect to the cloud server > Manually install the PHP operating environment (LNMP_+LAMP_) or Java operating environment > > Install