cloud computing
顾名思义是把计算放在云端Cloud computing is beside everyone
1. For example, when you run at night, you may open Xiami Music to listen to the song. In fact, the songs in Xiami Music are stored in the cloud.According to the user's permissions (normal user / vip), you can obtain the corresponding resources.According to the sound card on the mobile phone, Process and play-> store and download songs as another matter
2. Backup and recovery of Huawei mobile phones, backup is equivalent to synchronizing some information such as mobile phone contacts to Huawei cloud, and restore them according to demand
Cloud computing applications are still relatively high in the application of social positions
: carrier telecommunications have Tianyi cloud, mobile has mobile cloud, Unicom has Woyun, Huawei cloud computing we are learning, VMware cloud computing, convincing cloud, H3C Cloud, and enterprise data / cloud desktop, etc. all involve the cloud
Baidu SkyDrive-> Every user will have 2T space, VIP5T storage space, we call it thin provisioning in the field of cloud computing, for example, when the user registers, the network disk will draw a "cake" for the user-> 2T The concept of is a virtual concept, the upper limit is 2T, if only one 5M song is stored, actually 5M is used, there may be 10 people who have stored the same movie and integrated resources
Our main deep learning is Huawei Cloud 
Elastic Cloud Server
It is completely configured according to user needs.This type of cloud belongs to a public cloud.Huawei configures it, users rent it according to demand, and then Huawei charges a certain fee.
Advantages of cloud computing
- On-demand self-service-> According to user needs, on-demand service is provided.If 6G memory is not enough during the use process, it can be self-service expansion on demand, which can be thermally expanded, but not shrinkable
- Extensive network access: For example, if you rent a Huawei cloud virtual machine, Huawei will assign you an account password.You can log in on any terminal (PC, PAID, iphone) (ip reachable)
- Resource pooling: The foundation of cloud computing, which can also be called virtualization. The so-called resource pooling, if there are 100 servers, you can put the storage resources / cpu resources / memory resources / network resources of 100 servers into storage resources / CPU resources / memory resources / network resource pools are uniformly allocated, and resource pooling is the focus of cloud computing
- Rapid elastic scaling: Just like elastic cloud servers, for example, cpu resources are not enough, you can add cpu resources, memory is not enough to add memory, and online elastic expansion is carried out. The background server of the website can't handle it, but now, with the support of the LB (load balancing-> will be explained at the end of the article) device, you can achieve virtual rapid elasticity according to the proportion of the running resources of the receiving tasks of each virtual machine Expansion, resulting in the ability to deal with no matter how large the user usage is, when the business is low, these virtual opportunities are gradually offline, to save resources
- Measurable service: Alibaba Cloud-Huawei Cloud, they sell resources to customers, and how many resources you use will be differentiated and measured for memory charges
Speaking of what is cloud computing now
U.S. National Institute of Standards and Technology defines: Cloud computing is actually a model (virtualization is a technology), which can achieve a shared pool of configurable computing resources (resource pooling) anytime, anywhere, conveniently, and on demand For example: computing resources, network resources, application resources (Ximi / Baidu Netdisk is an application resource based on cloud computing, and the manufacturer packages it) and service resources, resources can be quickly supplied and released (Huawei Elastic Cloud Server The various memory intensiveness inside, etc., there are templates in the background, according to the template to quickly clone the virtual machine, it may only take a few minutes, you can get this resource in a short time), interaction with the service provider Correspondence is reduced, purchases are made on the official website of Huawei Cloud, fully self-service, reducing the cost of manual services and other expenses
云计算推动的需求是(起源):在长期网络规划中,机房里面的服务器很长时间内cpu和资源占有率/内存占用率都是极低的,平均资源利用率不足5%,造成了极大的资源浪费,所以云计算的本质是为了提高性能特别突出的一些服务器的资源占用率After learning here, students have questions: how to calculate in the cloud?-> The essence of computing is still on the server
Students who are interested in the history of network development can go to Baidu Encyclopedia to check the
history of computing:
parallel computing: its basic idea is to use multiple processors to collaboratively solve the same problem, the problem to be solved is broken down into several parts, each part A separate processor for parallel computing
Distributed computing: Distributed computing breaks down the application into many small parts and distributes it to multiple computers for processing. This can save the overall calculation time and greatly improve the calculation efficiency.
Network computing: Grid computing is a type of distributed computing. It divides a problem that requires very large computing power to solve into many small parts, and then distributes these parts to many computers for processing, and finally combines these calculation results. Get the final result
Cloud computing: pooling server resources and using pooled data for data computing-> learning focus
| Cloud computing 1.0 | Cloud Computing 2.0 | Cloud Computing 3.0 |
|---|---|---|
| Computing virtualization | Software definition and integration | Cloud native and refactoring business |
| Hyper-v (Microsoft) XEN (Cloud Desktop) KVM (Huawei) VMware ESX | OpenStack VMware AWS | Cloud Foundry CoreOS Docker |
| Better resource utilization | Infrastructure cloudification, resource service standardization, automation | Application cloudization, agile application development (unmanned driving) and life cycle management |
Software integration: There are 2 companies behind Tianyi Cloud's early rise, one Huawei cloud and one vmware. As a telecommunications platform, it needs a large hat OpenStack, which can manage and use the resources in Huawei cloud and vmware.
2.0 is already perfect, but the development of 5G technology requires more accurate network delays (unmanned driving), so it is necessary to build a lot of cloud data centers to ensure enough delays and introduce Docker technology.
Cloud computing deployment
modelPublic cloud: enterprises to build and let ordinary users use it, need to pay a certain fee for resources, there is a complete billing system
private cloud: early large and medium-sized enterprises, Baosteel Group, Dongfeng Group, to Established in the name of the unit for the use of
hybrid cloud in the unit department : public cloud and private cloud hybrid networking, H3C has a nice name for this connection called cloud rainbow, part of the data is processed by the public cloud, and part of the data is processed by the private cloud to protect the private cloud Data security, you can build an enterprise firewall, it can be a physical firewall, or it can be a virtualized firewall (VFW)
Industry cloud: each industry cloud has each industry's core data
transportation industry cloud: verticality, such as railways,
financial industries Cloud: high reliability
medical industry cloud: fast data transmission speed, large storage space, individual as a unit, the establishment of medical files,
different industries have different requirements for cloud
Cloud computing service model
IaaS: Elastic cloud server
PaaS on Huawei Cloud : For example, to develop python, you can purchase a virtual machine
SaaS that is configured in the python environment : For example, some software such as Xiami Music, mobile games, etc.
Note:
Load Balance (LB) is a clustering technology of servers or network devices. Load balancing shares specific business (network service, network traffic, etc.) to multiple servers or network devices, thereby improving business processing capabilities and ensuring high availability of business-> Baidu Encyclopedia