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The concept of "booting" a machine takes on a different meaning when talking about the virtual world. You will start with a physical machine on which you have installed an operating system. When you boot that machine, the OS loads into memory, takes inventory of all the devices connected to the machine, and runs any routines or applications you have specified.
Using virtual server management software, such as a product from VMware, that runs on the above machine, you will define a virtual machine, or virtual server, to which applications and users connect. The virtual server software controls the virtual server and acts as if it were a physical machine. Booting a virtual server can mean shutting down the virtual server with the vm management tool you use and restarting it.
One advantage to using virtual servers is being able to do maintenance with little to no downtime. With the right software, you can move the application load from one virtual server to another and do your maintenance on the original machine. It is useful to have your virtual servers spread across several physical servers. Should one physical server fail, you can shift the load to other servers and take the failed box offline. Once the server is repaired or replaced, you can start your virtual servers back up again and move the load back.
Depending on the vm software you use, you can specify that the virtual machines come up when you boot the physical machines. Because they will all be competing for the same pool of resources (cpu and disks), make sure to stagger the vms so they all don't try to start up at once. This will also make sure that the right devices have come online before booting certain vms that need those devices.
You can also control the shutdown of virtual machines when you shut down the host OS. Most vms can be saved in their point-in-time state. This is useful if you need to boot the physical machine, for instance, after applying an OS patch.
http://content.dell.com/us/en/enterprise/virtualization
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What are virtual servers When would you use more than one?
Exchange Virtual Server is a clustered Exchange installation. When Exchange is installed on a Windows Server 2003 cluster, it is configured as an Exchange Virtual Server that can be passed between cluster nodes transparently to Exchange clients. 1. SMTP Virtual Server, 2. HTTP Virtual Server, 3.POP3 Virtual Server, 4. IMAP4 Virtual Server and so on To access a network application or resource in a nonclustered environment, network clients must connect to a physical server (that is, a specific computer on the network identified by a unique network name and Internet protocol (IP) address). If that server fails, access to the application or resource is impossible. Through server clusters, Windows Server 2003, Enterprise Edition and Windows Server 2003, Datacenter Edition enable the creation of virtual servers. Unlike a physical server, a virtual server is not associated with a specific computer and can be failed over like a group. If the node hosting the virtual server fails, clients can still access its resources using the same server name. A virtual server is a group that contains: A Network Name resource. An IP Address resource. All other resources, including applications, to be accessed by the clients of the virtual server. Other virtual servers. exchange server uses protocol virtual server 1.smtp virtual server 2.imap virtual server 3.http virtual server 4.pop3 virtual server
Set up a Virtual Private Server?
form_title=Set up a Virtual Private Server form_header=A virtual private server is a separate server that's running on the same physical machine. What will you use the virtual private server for?=_ Will you need an anti-virus progam installed?= () Yes () No What operating server do you want running on the server?=_
What is the command to reboot an AIX server?
shutdown -Fr
What is a Windows Virtual Server?
A virtual server is one that creates partitions within a physical server so that it functions as several servers, virtually. A Windows Virtual Server is one that runs on the Windows Operating System.
What is a virtual private server?
A virtual private server is a server that looks and acts like a dedicated server but actually is installed on a computer that services multiple Websites.
What is virtual server hardware used for?
Virtual server hardware is used to facilitate in the creation of virtual machines. Virtual machines execute programs like physical machines.
Where can one acquire a virtual server to host their applications?
A virtual server to host applications can be cannot be acquired. A virtual server is basically a virtual machine, which means it can be run simultaneously on the same computer. The virtual machine acts like a separate computer system though.
What companies make virtual server hardware?
VMware makes virtual server hardware and partitions a physical server into multiple virtual machines. You can read more at www.vmware.com › Products › Datacenter Products
What does the virtual server 2005 do?
The Microsoft Virtual Sever deals with creating virtual machines for several Windows operating systems. The Virtual Server 2005 R2 SP1 is the latest version.
How can one acquire a virtual private server?
Online there are many hosts from which you can acquire a virtual private server. Costs can be quite reasonable if you shop around. In the long run a virtual private server can save you money.
Who provides pricate virtual server hosting?
You have several options for pricate virtual server hosting.I would go with www.HostGator.com
What are some dedicated virtual serving hosts?
A virtual serving host offers virtual server facilities to users. Virtual servers are virtual machines that are functionally equivalent to a physical machine, even though multiple virtual servers can be hosted on a single physical server. Some examples of virtual server hosts include DreamHost, Soft Layer and GoDaddy.
