IPv6: The New Internet Protocol
Author: Christian Huitema
Publisher: Prentice Hall 1996
Reviewer: Danny Yee
Huitema's IPv6 is a concise but comprehensive description of the new Internet protocol. It begins with a very brief account of the motivation for a new protocol and the background to its selection (the competition between the different contenders), then plunges straight into the technical details: a chapter describing the basic packet format; one on routing and addressing; chapters on auto-configuration, security, and support for flows; a chapter on transition issues; and a final chapter in which Huitema offers his personal opinion of the major decisions made in the protocol design.
Each of the chapters goes into some detail. The chapter on security, for example, describes the Photuris key exchange system quite thoroughly, while the chapter on flows enters a little into the issues of fair queuing. Each chapter also discusses the points which were controversial in the decision process: such things as the length of the addresses, the mandation of potentially unexportable security support, the relationship between IP and ATM, and the choice of a dual-stack approach to IPv4-IPv6 integration rather than use of header translation. I felt that IPv6 had much more meat to it than Bradner and Mankin's longer IPng (Addison-Wesley 1995), but the two books are really complementary, with the latter dealing more with the historical context and the framework within which the decision was made than with IPv6 itself (the difference in titles is appropriate).
IPv6 is a very nice little volume, marred only by poor proof-reading—there were far too many simple grammatical mistakes, and at least one spelling error which any automated spell-checker should have found. Anyone interested in the technical details of IPv6 will want a copy—even if you are prepared to wade through the relevant RFCs, IPv6 provides annotated references to these and other important papers at the end of each chapter.
Disclaimer: I received a review copy of IPv6: The New Internet Protocol from Prentice Hall, but I have no stake, financial or otherwise, in its success.
Danny Yee (email@example.com) All book reviews by Danny Yee are available via anonymous FTP: anatomy.sy.oz.au in /danny/book-reviews (index INDEX).
Practical Task Scheduling Deployment
One of the best things about the UNIX environment (aside from being stable and efficient) is the vast array of software tools available to help you do your job. Traditionally, a UNIX tool does only one thing, but does that one thing very well. For example, grep is very easy to use and can search vast amounts of data quickly. The find tool can find a particular file or files based on all kinds of criteria. It's pretty easy to string these tools together to build even more powerful tools, such as a tool that finds all of the .log files in the /home directory and searches each one for a particular entry. This erector-set mentality allows UNIX system administrators to seem to always have the right tool for the job.
Cron traditionally has been considered another such a tool for job scheduling, but is it enough? This webinar considers that very question. The first part builds on a previous Geek Guide, Beyond Cron, and briefly describes how to know when it might be time to consider upgrading your job scheduling infrastructure. The second part presents an actual planning and implementation framework.
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With all the industry talk about the benefits of Linux on Power and all the performance advantages offered by its open architecture, you may be considering a move in that direction. If you are thinking about analytics, big data and cloud computing, you would be right to evaluate Power. The idea of using commodity x86 hardware and replacing it every three years is an outdated cost model. It doesn’t consider the total cost of ownership, and it doesn’t consider the advantage of real processing power, high-availability and multithreading like a demon.
This ebook takes a look at some of the practical applications of the Linux on Power platform and ways you might bring all the performance power of this open architecture to bear for your organization. There are no smoke and mirrors here—just hard, cold, empirical evidence provided by independent sources. I also consider some innovative ways Linux on Power will be used in the future.Get the Guide