During the Spring Festival, discusses the doorway YunHongJun with friends in web celebrity DRS distributed resource scheduling,



Spring Festival a meal, eat see distributed resource scheduling



We all understand, specific how to operate?



We continue to take the table data center for example, if compared to a banquet, the server is on the banquet table, the scene of the virtual machine is,



In the previous article, we solve some tables are better than one, some tables are less balance issues, but people are thoughtful, today, we have to take care of these special groups -





Resource pool more physical machine load actually often appear the circumstance that does not mean: load large physical opportunity to influence the performance of the application, load small physical machines and waste of resources, the traditional physical machine it is difficult to achieve effective utilization of resources, when the physical machine reaches load bottleneck is difficult to achieve resource dynamic adjustment,



A distributed resource scheduling functions, the system will automatically according to the physical machine load transfer virtual machine, not only ensure the normal use of the virtual machine application, and raised all the server resource utilization,



We have known something about cloud computing distributed resource scheduling DRS important role, so how to correctly use this function?



A distributed resource scheduling DRS is not simply the virtual machine from the load heavier physical machine in the migration to the load lighter physical machine is ok, because this is not good to meet the needs of actual production environment, in general, these needs can be classified as the following:



1. The same related business need to deploy a group of virtual machine in the same physical machine, business should not be migrated to physical machine for other business;

2. To satisfy certain requirements of high availability, redundancy, such as virtual machine requires two or more virtual machine must be run on a different physical machine;

3. The virtual machine for running in the special physical machine in order to achieve high security performance and purpose,



In response to the above situation, provide the corresponding product solutions YunHong - DRS high-level scheduling rules,



Before we introduce this solution, we need to first understand a few simple concept definition,



Resource group: a combination of the same resources, including the virtual and physical host group crew,

A collection of physical units: a physical host, the same physical host is not allowed to exist at the same time two resource group,

Virtual unit: a collection of virtual machine, the same virtual machine is not allowed to exist at the same time two resource group,



Based on the resource group, physical units, virtual machine, virtual machine these concepts, a total of 3 DRS senior scheduling rules rules are used to control the virtual machine migration,



Gather the virtual machine

When a virtual machine because of its physical host under the high load and migration occurs, will be to the virtual machine's virtual units within other virtual machine migration on the physical host,



Like many people participated in the activities of a company dinner, people in the same company, sat in the same table, even changing places to sit together, with the right company people



Gather the virtual machine



The mutex virtual machine

Is the opposite of gathering virtual machine, virtual machine migration occurs, not to the virtual machine's virtual units within other virtual machine migration on the physical host,



As customer meal, each table should have organizers, with clients, head of the head to disperse to the table and not gathered in a,



The mutex virtual machine



The virtual machine to host

Migration occurs, can set up a virtual machine on the specified physical host group migration,



90% activities such as the banquet table to arrange for the visiting guests, the organizers of the staff change no matter how to sit by the staff dedicated table,



The virtual machine to the host