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An Authorized Resource on Citrix Products Exploit the server-based computing alternative using Citirx MetaFrame 1. 8,Windows 2000 Terminal Services,or ...
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An Authorized Resource on Citrix Products Exploit the server-based computing alternative using Citirx MetaFrame 1. 8,Windows 2000 Terminal Services,or Windows NT 4. 0,Terminal Server Edition. Learn how to plan and implement a server-based environment,ensure a redundant and scalable data center,integrate with legacy systems,and centralize printing and Web browsing services. You'll also find all the information you need on rollover and migration plans,security protocols,virus protection,and network management procedures. Reduce the complexity and total costs associated with end-to-end enterprise class computing in no time!
Three major industry trends will ensure that the explosion of server-based computing will not only continue, but also accelerate. These trends are based upon laws of both technology and economics: Moore's Law, Metcalf's Law, and the law of supply and demand.
Gordon Moore, a cofounder of Intel, discovered decades ago that the number of transistors per square inch doubles roughly every 18 months. Moore's Law means that server performance doubles roughly every 18 months without corresponding increases in cost. As more powerful MetaFrame servers support ever more thin-client users, the economics become even more favorable toward centralizing most organizational computing. For example, suppose a company wants to deploy an application that would normally require an upgrade of all existing PCs. The option of purchasing one MetaFrame server, today, instead of 100 new desktops is certainly going to be attractive. But within a couple of years, a similarly priced MetaFrame server will likely handle 200 concurrent users or more. This makes the hardware cost savings of the server-based computing solution even more enticing.
Bob Metcalf invented Ethernet and cofounded Kom. George Gilder says that Metcalf's Law of the Telecosm refers to receiving n squared potential value when connecting any number of n machines in a network. In other words, as corporations exploit the rapidly dropping cost of bandwidth and server-based computing technology to connect users in remote offices, they will realize exceptional, and often unexpected, benefits. The exponential value of Metcalf's Law is not in the additional network links per se, but the myriad different ways in which the new users will use existing corporate information to create new information. Remote-office users can then utilize corporate databases and network resources as if they were working at headquarters. A greater sense of community is enabled throughout the organization, and different divisions can share common information and best practices much more easily.
Law of Supply and Demand
PC-based computing is extraordinarily labor intensive. It is not uncommon for network administrators to spend up to 80 percent of their time solving end-user issues such as hardware failures, deleted icons or INI files, and problems resulting from loading applications or software utilities. This has resulted in a shortage of network administrators relative to the demand for properly skilled labor, which in turn has created a rapid escalation of salaries for IT personnel. Just obtaining a valued certification such as becoming a Microsoft Certified Systems Engineer (MCSE) can easily add $10,000 to an administrator's salary. The rising cost of networking talent makes the huge administration savings obtained from server-based computing even more attractive.
A server-based computing environment requires far fewer network administrators than does the PC-based computing alternative. Server-based computing virtually eliminates the need for time-consuming desktop troubleshooting. System administrators no longer have to handle the same desktop problems over and over again. The ability to standardize on all applications makes application troubleshooting easier as well. Administrators can also "shadow" a user's session, which lets them see and control the user's PC screen, mouse, and keyboard.
Rather than spending the majority of their time on unpleasant, unchallenging, and unrewarding end-user support issues, administrators can now have the time to work on implementing more interesting technologies such as e-commerce and workflow. This helps IT managers retain good administrators while making their organizations more efficient and competitive.
Corporate ASP Concerns
When considering implementation of a Corporate ASP, it is important to address concerns about network infrastructure reliability and single points of failure. We have also discussed Corporate ASPS as if the only option were to utilize both Microsoft Terminal Services and Citrix MetaFrame software. We need to address concerns about using only these technologies.
The Corporate ASP may be a new concept for your organization, but it is dependent upon your existing network infrastructure. It is senseless to take on a Corporate ASP project unless your organization is willing to make the necessary investment to bring your network infrastructure up to an extremely reliable and stable condition.
A history of network unreliability may have created the perception that users require their own departmental servers or must keep applications on their local hard drives to enable continued productivity in the event of network failure. In reality, users are becoming so dependent upon network applications, such as e-mail and browsing, that network failure means a loss of productivity in any case. Beyond this misperception, it is more prudent to spend a smaller amount of corporate resources building a redundant and reliable network than it is to devote a large amount of resources to maintaining an extremely inefficient PC-based contingency plan. Server-based computing saves so much money on the client side that organizations should easily have the financial resources required to build world-class data centers and network infrastructures.
Single Point of Failure
Concentrating all of your former PC-based computing into a central data center leaves your remote offices, in particular, exposed to potential downtime risks that they formerly did not face. These risks can be partially mitigated by building reliability and redundancy into the data center that go well beyond anything the remote offices could do on their own. Establishing a secondary redundant data center enables remote offices to continue working even in the event of a major catastrophe at the main production data center. In a PC-based computing environment, the remote offices are extremely unlikely to have access to a redundant "hot site" that could enable their users to keep working should their own server setup meet with disaster. Finally, redundant bandwidth connections should be implemented to enable at least key remote-office employees to keep working in the event of a communications failure. These topics are discussed more thoroughly in Chapters 5 and 6.
Everything Is Going Web Based Anyway
Software manufacturers are increasingly writing Web-based interfaces to their applications that may eventually obviate the need for a traditional Terminal Services /MetaFrame hosting environment. Today, however, it is a Windows world. Most users prefer the dynamic and robust Windows interface to the static Web-server HTML interface. Additionally, a browser requires a deceptively fat client in order to accommodate complex Java scripts and browser plug-ins.
Citrix is committed to deploying all applications effectively through a thin client. It makes more sense to invest in server-based computing technology that will work for both Windows and Web-based applications, than it does to continue investing in a bloated PC-based architecture that is inefficient today and will be even more inefficient in the future.
Microsoft Is Going to Make MetaFrame Obsolete
As with other Microsoft independent software vendors (ISVs), the challenge for Citrix is to continue adding value to Terminal Services. Thus far, they have unquestionably succeeded. Constructing an enterprise server-based computing environment today without benefiting from the load balancing, application publishing, management utilities, and many other MetaFrame enhancements would be both impractical and unwise. MetaFrame and the accompanying Citrix support are an integral part of any serious Corporate ASP. If, in the future, Microsoft or some other vendor makes MetaFrame unnecessary, then only the software investment is lost. Although the cost of the MetaFrame software is not insignificant, it pales in comparison to the savings that will be realized from implementing a Corporate ASP.
A Corporate ASP is a serious and complex undertaking utilizing relatively new technology on constantly changing platforms. It is imperative that sacrifices not be made in the quality of the data center and networking infrastructure. This is also true for the MetaFrame component. Delaying the decision to implement a Corporate ASP in order to see what the future may bring means the continuation of huge unnecessary expenditures in the present...
|1||Introducing the Corporate ASP Alternative||3|
|3||Windows Terminal Services||53|
|4||Preparing Your Organization for a Corporate ASP||79|
|5||Data Center Architecture||103|
|6||Designing Your Network for Server-Based Computing||125|
|7||File Services for Server-Based Computing||169|
|8||Remote Access Strategies||203|
|11||Choosing the Right Thin Client||295|
|12||Project Managing the Corporate ASP Implementation||317|
|13||Installation and Configuration of MetaFrame and Terminal Services||339|
|16||Profiles, Policies, and Procedures||435|
|18||Deploying Terminal Services||485|
|A||Creating a Corporate ASP Financial Analysis Model||509|
|B||Creating a Corporate ASP Subscription Billing Model||523|
Posted June 20, 2000
Although I have never touched a real computer (I did this on WebTV), I think this book is great. Citrix is a new fruit in the industry. MEdiaFrame is the best tasting fruit. Do not buy other books on this subject, you have found the best one.Was this review helpful? Yes NoThank you for your feedback. Report this reviewThank you, this review has been flagged.