microservices architecture principles

KVM architecture and principles 1. KVM Architecture The basic structure of kvm consists of two parts: The kvm driver is now a linux kernel module. It is mainly responsible for creating virtual machines, allocating virtual memory, reading and writing VCPU registers, and running VCPU. Another component is Qemu, which is used to simulate the user space components of

Load Balancer server, and there are several basic technologies for load balancing. HTTP Redirection load Balancing, DNS domain name resolution load balancing, reverse proxy load Balancing, IP load Balancing, data link layer load balancing.Unlike the scalability design of the application server cluster, the scalability of the distributed cache cluster cannot be achieved by using a simple load balancing method, because the cached access requests are not processed in any one of the cache servers d

Architecture and basic principles of Android dynamic loading framework DL For more information, see [Mr. Simple blog ].I am participating in the blog star. Click here to vote for me. Thank you ~ Preface In the past one or two years, the number of plug-ins used by Android apps has become larger and larger. In fact, it is caused by rapid expansion of business, increasing demand, and application bloated. Altho

data is not lost, the site service normal operation, so a certain degree of server redundancy operation, data redundancy backup is Necessary.8: AutomationAt present, large-scale web site automation is mainly embodied in the release operations, as far as possible to reduce human intervention can effectively reduce the emergence of the issue of longevity9: SecurityInformation security has always been a large web site to ensure the normal operation, the current accumulation of security models are:

Appium is implemented on the basis of a test framework that comes with the mobile operating system, and the tools used on Android and iOS systems are: Android (Version >4.2): uiautomator,android4.2 After the system comes with the UI Automation Test tool. The Ios:uiautomation,ios system comes with a UI Automation test tool. The architecture principle of appium is composed of two parts: client and server, and the client communicates with the

an IPSec session tunnel to the intranet DNS server and domain controller, the DirectAccess client and server use computer certificates for mutual authentication.6) When the user logs on, the DirectAccess client establishes a second IPSec tunnel to access the intranet resources. DirectAccess clients and servers use a combination of computer and user credentials to authenticate each other.7) The DirectAccess server forwards traffic between the DA client and the authorized internal resources.The D

The AlwaysOn technology supported by SQLServerAlwaysOn architecture and principles by Du Fei SQLServer2012 focuses on the advantages of failover clusters, database images, and log transmission, but they are different. The unit of the Failover cluster is SQ. The AlwaysOn technology supported by SQLServerAlwaysOn architecture and

server outage, the service is still available, the primary means of use is redundancy.Scalability is the constant increase in user access pressure and growing data storage requirements by adding servers to the cluster.The website's extensibility agencies directly focus on the functional needs of the site. The main purpose of the website Extensibility architecture is to design the architecture of the site s

server broadband , direct orders four aspects of the content, the strategy also contains a separate deployment, page static network bandwidth dynamic generation of random next page URL four aspects. The architecture of the second-kill system describes how to control the seconds to kill the product page of the purchase button and how to allow the first submitted order to be sent to the order subsystem two aspects of the elaboration, through reading to