First, the concept of cloud computing
(A) generating a background cloud
Technology-driven: ICT technologies to promote the integration of ICT infrastructure upgrade, in 1988 after the computer network is the probability that the rapid development of cloud computing standards.
Demand-driven: huge amounts of data to various ICT enormous pressure, also caused higher costs; cloud computing can fully combine all the resources needed to use them to reduce operating costs.
Change the business model: Business: Business operators have started computing services (AMS, goole). Personal: In order to reduce this expenditure Chen has been more and more people using cloud services.
Other: data flow over the past three years, increase by 50 times, a variety of terminal devices (PC, mobile terminal) prompted 10 times every 10 years.
Traditional computational complexity: transmitting data center resources dispersion, resource utilization is low. The average length of service restoration time. Manual allocated resources engineer. We need a variety of operation and maintenance tools.
Business slow: large data processing ability is poor, can not effectively enhance business acumen. Resource demand elasticity can not be adapted. Can not effectively support the full life cycle of business development. Multi-DC decentralized co-poor, commercial difficulty concentrating.
(B) the concept of cloud computing
Business Perspective: == cloud computing on-demand payment information power plant
Traditional data center computing and storage migration from the LAN to the Internet, software migration from the terminal to the cloud, hardware sharing.
Technical Perspective: == cloud computing / storage network
Multiple applications via the cloud platform software cloud computing (virtualization, resource management, cluster management, distributed storage) built on the server and storage network, establish a connection via Ethernet switch.
Chivalrous
Delivery and usage patterns to obtain the resources needed by the demand and scalable way IT infrastructure. Including infrastructure, platform, software.
Generalized
Through the network on demand and scalable way to obtain needed services.
(C) cloud deployment patterns
Private cloud: the cloud infrastructure is owned by a separate organization and only for the organization's operations.
Public Cloud: The cloud service infrastructure operators have the infrastructure for the public and enterprises to provide cloud services. Cloud computing infrastructure owned by an organization selling and computing services to the general public or a large industry groups.
Hybrid cloud: the cloud infrastructure composed of two or more clouds composed of external performance as a whole, through a standard protocol bindings, realized data portability. Private cloud can be physically in the same room, logic, public cloud isolation through corporate firewalls, secure data.
(D) Application of cloud computing model
LaaS: infrastructure layer services. Virtual machines, cloud disc rental and other
PaaS: Platform and service. For developers.
SaaS: software services. For the end user.
Second, the value of cloud computing
1, customers of the cloud industry awareness
59% believe that cloud computing has to evolve to the development platform. 75% believe that 2016 IT contribution will be based on cloud. 50% of the security relationship. 43% thought they had found the right partner to launch cloud strategy is essential. More and more people began to accept cloud computing.
2, difficulties and challenges
Complexity and smoothness, reliability or SLA (service type and quality), automatic sharing service automatically reduce the load, whether business can live migration, cloud platform data security, how to choose a cloud computing platform vendors, whether it takes the cost can be recovered and profitability.
3, the value is - intelligent resource scheduling
Load balancing: Migrate a virtual machine at full load being applied to another use but are not fully loaded virtual machine. Low 2 virtual machine utilization, move applications to a virtual machine to another shutdown.
Improve resource utilization:
Resource sharing: through virtualization to consolidate multiple servers to a lower utilization of physical servers, providing single server utilization by adding a virtual machine. Consolidation ratio 1: 5-1: 10
Time-Sharing: Different services have different peak, the peak of the business integration of two different servers to one physical server implementations do not use the shared virtual machine.
4, distributed computing storage:
E.g:
(1) Distributed Computing 1: 2 Account Manager for a hotel broadband 100 to open an account, an average of 50 per person accounts, accounts of human time is long, and now again three account manager to help complete, it is now each account manager 20 to open an account.
(2) Distributed Computing 2: Due to a customer account manager during temporary emergency leave, now 100 broadband would be assisted by the completion of the remaining four people.
(3) Distributed Storage 1: Account Manager to save a four-page protocol, how to complete error-free save in the case of Zhang spent the least, practice: a copy of the agreement, a total of eight, specifically allocated as follows:
Support Account Manager support line industry leader
Positive 1, sub 4 positive 2, sub 3 positive 3, sub-2 positive 4, sub 1
After which such a person can lose the agreement put together a complete agreement of the other three people.
(4) distributed storage 2: Due to some changes in staff positions, newcomers not yet reached any case, you can own hands two protocols were handed over to the other two individuals. Such as: Leader transferred can be referred 4 positive industry branch, deputy manager 1 by the customer.
5, unified management
The infrastructure layer data reported to the upper centralized monitoring platform monitoring, virtualization directly automation control device implementing automation control equipment through integrated service management platform (configuration machinery, change operation, unified authority control), while the highest level for business management system and safety management system to achieve unified management of equipment and resources.
6, the rapid deployment of business
Traditional IDC need to purchase - installation - the publishing process, server publishing business requires at least three months.
Cloud computing on-demand provisioning anywhere IDC just from the resource pool. Operational readiness cycle for three days.
7, cloud computers
Cloud computing service providers: the integration of traditional server virtualization to enable more customers to share infrastructure, more economical, fast and efficient service delivery and ability to provide cloud computing services recommended service opportunities for all kinds of business, government and corporate customers, while improve efficiency, energy saving value proposition.
Consumers: Available data content, applications and services anytime, anywhere, and enjoy a wider range of services.
Midsize customers: to achieve a more reasonable cost access to enterprise-class IT services and more advanced service industry chain as well as the opportunity to develop cloud services.
Business users: to reduce equipment complexity, cost and IT dependence, improve flexibility, agility and capacities, increase coordination of services and global capabilities and weakening dependence, focusing on the core business and services.
Government agencies: provide a wider range of government, citizens, businesses and industry service capabilities, efficient government and energy conservation, transition to industrialization and information technology, economic development and social harmony and environmental sustainability a strong guarantee.
Third, the virtualization technology Introduction
1, virtualization history of development
69 years on the mainframe virtualization has been applied
Application 99 of that year appeared logical partitions on a minicomputer
In 2000 x86 platform virtualization technology began to appear
In 2001 x86 virtualization technology application on the server.
2, driver of virtualization technology
cpu faster and faster, beyond the requirement of the hardware performance
interl and join AMD cpu in virtual instruction
Pressure on business costs
Environmental pressures
Growing business pressure
3, Virtualization Overview
Virtualization technology to a physical machine into multiple logical computers, each computer logical different the OS, the application can be independently of each other in a relatively independent space Run Run.
4, virtualization main content
(1) computing Virtualization
CPU virtualization, memory virtualization, I / O virtualization
(2) storage virtualization
+ Raw device logical volumes, storage virtualization, storage virtualization host file system +
(3) network virtualization
VPN、vlan
5, virtualization nature
Zoning: You can run multiple virtual machines on a single physical server, on-demand hardware resource pool.
Isolation: isolation between each virtual machine, business independently of each other.
Package: a virtual execution environment in the package in a separate file, copy the file is moved by moving the virtual machine.
Independent: The virtual machine can run without modification on any physical machine, virtual machine live migration.
Live Migration: includes virtual network (vlan, ip, information security group), vm.