What is KVM? What are the general?

KVM: is an abbreviation for Keyboard Video Mouse. KVM switches give you access and control of your computer by connecting directly to keyboard, **, and mouse (KVM) ports.

KVM technology does not require the target server to modify the software. This means that the target computer can be accessed at any time in the Windows BIOS environment. KVM provides true motherboard-level access and supports multi-platform servers and serial devices.

Functions: digital KVM, analog KVM

Ports are divided into 1 port, 2 ports, 4 ports, 8 ports, 16 ports, 24 ports, 32 ports, and 64 ports.

Parameter viewing:itkvm

KVM is a device that uses a set of keyboard, mouse, and monitors to manage multiple servers, also known as a switch, and is generally used to centrally control the servers in the computer room.

There are currently three types of products:

1. Simulated KVM. The control distance is limited, and it can only be operated in front of the KVM. The switch is fast, cheap, and the market has the largest holdings.

2. Analog KVM+IP control card. The controlled server can be remotely operated through the network, but there are up to 2 remote users, and the switching speed and image quality are relatively poor, so it is impossible to centrally manage, and the users and permissions cannot be managed. **Higher than analog KVM, suitable for users with low experience requirements and low cost requirements;

3、ipkvm。The controlled server can be remotely operated through the network, and multiple remote users can access it concurrently, and up to 8 remote IP users can control it at the same time. As long as the network is accessible, it can be remotely controlled anywhere, and at the same time, users, permissions, and controlled servers can be centrally managed to have higher security.

It is suitable for computer rooms with a large number of servers, which is higher and the most convenient to control and manage.

KVM is the latest virtualization technology to appear, which is a core-based virtualization technology; Many domestic operators are trying and using this technology, such as Alibaba, Amazon, etc.;

In addition, Red Hat's current product RHEV virtualization uses core-based KVM technology;

Red Hat has abandoned the previous ZEN virtualization in favor of KVM; Fundamentally, it has less source code and is lighter;

It is a major trend in the development of virtualization in the future, because the hot topic of virtualization has shifted to the big hot topic of the cloud;

According to Redhat's official product positioning, the KVM technology used by RHEV itself is produced for enterprise private clouds;

I know there's a coalition of Red Hat RHEV virtualization communities, created by Redhat with IBM, Intel, and Solutionware, and it seems like this community was created by highly skilled people from these vendors and service companies, and you can explore it.

The abbreviation KVM is very popular! Huh

To put it simply: KVM is an abbreviation for keyboard, video, and mouse. Also known as a switch, it is used to manage and control devices that control multiple computers or servers.

The core idea of KVM technology is to realize the centralized management and provide manageability of the system and network through the appropriate configuration of keyboard, mouse and monitor, improve the work efficiency of the system administrator, save the area of the computer room, and reduce the total cost of ownership of network engineering and server system.

A multi-computer switch (KVM) is a management device in a network, and it is the first letter of the words keyboard, video, and mouse. That is, it can realize the use of a set of keyboards, monitors, and mice to control multiple devices. The official name is the Multi-Computer Switcher.

KVM technology has evolved from the original basic SOHO office type to the enterprise IT infrastructure room facility management system. Servers and devices located in multiple remote locations can be easily and directly accessed from the KVM client management software. The KVM over IP solution features sophisticated multi-site failover capabilities, a direct interface that complies with the new server management standard (IPMI), and the ability to map local storage** to remote locations.

Emulate a KVM switch system to connect directly to the keyboard, keyboard, and mouse on any computer. It provides a simple plug-and-play installation system that is completely independent of software and network operating systems, and enables users to have real-time access to multiple computers. Emulated KVM is best suited for environments where users and systems are co-located, making it an ideal technology for accessing centralized multi-PC and multi-rack environments.

ATEN's KVM traditional analog KVM, matrix KVM, LCD integrated console, digital IP KVM, products are available, in the domestic mid-end market, the market share is high.

kernel-based

virtual

Machine, short for Machine, is an open-source system virtualization module that has been integrated into major Linux distributions since Linux. It is managed using Linux's own scheduler, so it has very little core source code compared to Xen. KVM has become one of the mainstream VMMs in academia.

Virtualization of KVMs requires hardware support (e.g. Intel

VT Technologies or AMD

v technology). It is fully virtualized hardware-based. In the early days, Xen was based on para-virtualization based on software emulation, and the new version is based on full virtualization supported by hardware.

However, xen itself has its own process scheduler, storage management module, etc., so it is relatively large. VMware, a widely circulated business system virtualization software

The ESX series is also based on para-virtualization based on software simulation.