By Chris Takemura
Xen, the open resource virtualization instrument, is a process administrator's dream. Xen is a loose, high-performance digital desktop video display that permits you to consolidate your and at last positioned these unused cycles to use—without sacrificing reliability, functionality, or scalability.
The booklet of Xen explains every little thing you must be aware of in an effort to use Xen successfully, together with set up, networking, reminiscence administration, and virtualized garage. you will additionally methods to use Xen and traditional Linux instruments to take photograph backups, practice QoS operations on community site visitors, and restrict over-aggressive disk users.
Authors Chris Takemura and Luke S. Crawford convey you ways to:
- Provide digital web hosting for dozens of clients, every one with their very own person needs
- Install and deal with a number of visitors, together with a variety of flavors of Linux, NetBSD, Solaris, and Windows
- Choose the precise digital garage strategies on your needs
- Migrate your platforms seamlessly and create new images
- Tune and benchmark your platforms to cause them to as speedy as possible
- Troubleshoot Xen's most typical difficulties like community and reminiscence management
Expert recommendation is invaluable in terms of working a classy open resource virtualization know-how like Xen. you will get the recommendation you wish in The ebook of Xen.
Read or Download The Book of Xen: A Practical Guide for the System Administrator PDF
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Extra info for The Book of Xen: A Practical Guide for the System Administrator
Open resource isn’t only a choice for me—I dislike lock-in, so I hardly purchase or set up or depend upon anything that I couldn’t change with a unique product provided by means of a competing seller someday sooner or later. like all critical open resource process, Xen has the facility of an surroundings during which anyone who desires to vend can choose a place and begin hacking, yet Xen additionally has the backing of a powerful corporation whose staff give a contribution to the open resource model in their product. this type of vertical openness allows for somebody (a hobbyist or a Fortune 500 corporation) to leap into Xen, purchase in simple terms what they need or desire (or simply get all of it for free), and feature it stay appropriate with the remainder of the surroundings. thanks, XenSource and Citrix, for all this. Confession time: I don’t use Xen for any of my own tasks. I simply don’t have adequate structures in anybody position, nor am i able to plan some distance sufficient in advance—I’m too small for you to find the money for virtualization’s efficiencies. at any time when I do want separation of privilege at the similar actual servers, I’ve been in a position to escape with FreeBSD jails or consumer Mode Linux. I additionally do a good volume of real-time paintings, during which i want my code to be as regards to the for design—and occasionally performance—reasons. for pro paintings, my corporation makes use of a mix of proprietary (VMware) and open resource (Xen) virtualization and the consequences are impressive. even if it’s to save cash on undefined, get a better price on sysadmin time, or let new sorts of computing, virtualization is a winner and it’s right here to stick. I’ve noticeable Amazon and Google construct huge clouds of virtualized servers for his or her personal use and for apartment to consumers, and this technique has pushed down IT expenses for either new and verified businesses of all sizes. It most likely saves energy and lowers the industry’s carbon footprint to boot. I’m suffering to discover the way to speak how amazingly cool this is often. we strive to put in writing courses that healthy right into a unmarried strategy, yet they prove taking an entire Unix approach as a result of the entire tactics and databases and shell scripts and dossier structures and UIDs they slop over. So we prove dedicating actual servers to purposes that experience no functionality- or security-related cause to be on devoted servers; yet every one takes up a few rack area and a few sysadmin time, and every one generates a few minimal quantity of warmth, etc. Then alongside comes virtualization, and we’re again to including actual servers basically whilst we’ve bought a superb cause to take action, which generally skill for capability purposes. observe that whereas i love cloud computing, I additionally worry it. Amazon and Google have their very own virtualization APIs, and someone who builds “version 1” of a process to dwell within this kind of advertisement clouds is perhaps signing as much as positioned “version 2” into an analogous cloud. festival calls for differentiation and such a lot owners are looking to be assorted in potential, not only in rate potency. In different phrases, lock-in is excellent for dealers yet no longer so nice for dealers. hence my allure to firm virtualization—and particularly to open resource firm virtualization, with the ensuing vertically open surroundings.