Slashdot Mirror

davids-world.com writes "IBM offers its optimized XLC compiler not just for Intel CPUs, but also for its own G5 processor (article in German at Heise). Unlike gcc, it is optimized for the G5 and achieves a major boost in speed, as first results show. I guess we will have to compare the new benchmark data (once available) with the data we get with the optimized Intel compiler for Xeon. The compiler is available for download now."

An anonymous reader writes "This column explains how to write secure applications; it focuses on the Linux operating system, but many of the principles apply to any system. In today's networked world, software developers must know how to write secure programs, yet this information isn't widely known or taught. This first installment of the Secure programmer column introduces the basic ideas of how to write secure applications and discusses how to identify the security requirements for your specific application. Future installments will focus on different common vulnerabilities and how to prevent them."

An anonymous reader writes "Welcome to Compiling sources and managing packages, the first of four tutorials designed to prepare you for the Linux Professional Institute's 102 (release 2) exam. In this tutorial, we'll show you how to compile programs from sources, how to manage shared libraries, and how to use the Red Hat and Debian package management systems."

paugq writes " IBM has released Visual Age 6.01 for Smalltalk for free for non-commercial use. You can download it here, it's available for Windows, Linux, Solaris, AIX, etc (registration needed). Smalltalk is a dynamically typed object oriented programming language designed at Xerox PARC during the 1970s"

paugq writes " IBM has released Visual Age 6.01 for Smalltalk for free for non-commercial use. You can download it here, it's available for Windows, Linux, Solaris, AIX, etc (registration needed). Smalltalk is a dynamically typed object oriented programming language designed at Xerox PARC during the 1970s"

An anonymous reader writes "Linux is quickly becoming a dominant platform for e-business and enterprise applications. The recent release of Fixpack 2 for IBM Tivoli Access Manager recognized this fact by adding support for Linux on the Intel platform. In *this tutorial*, you'll learn how to install and configure IBM Tivoli Access Manager on Linux. You'll also walk through some simple steps that will test your installation, including the creation of a WebSEAL junction."

theodp writes "After exchanging e-mail with mainframe software pioneer Mario Morino, Tim O'Reilly writes 'It's important for the open source community to look more at the software heritage of the mainframe era.' O'Reilly might want to take a look at how Marino's own MICS software has been used since the 80's to automatically charge IBM mainframe users for printed material that could be ordered from PC clients with a single action by using billing and shipping information that was previously stored on a Mainframe server. The whole process might seem oddly familiar."

theodp writes "After exchanging e-mail with mainframe software pioneer Mario Morino, Tim O'Reilly writes 'It's important for the open source community to look more at the software heritage of the mainframe era.' O'Reilly might want to take a look at how Marino's own MICS software has been used since the 80's to automatically charge IBM mainframe users for printed material that could be ordered from PC clients with a single action by using billing and shipping information that was previously stored on a Mainframe server. The whole process might seem oddly familiar."

theodp writes "After exchanging e-mail with mainframe software pioneer Mario Morino, Tim O'Reilly writes 'It's important for the open source community to look more at the software heritage of the mainframe era.' O'Reilly might want to take a look at how Marino's own MICS software has been used since the 80's to automatically charge IBM mainframe users for printed material that could be ordered from PC clients with a single action by using billing and shipping information that was previously stored on a Mainframe server. The whole process might seem oddly familiar."

theodp writes "After exchanging e-mail with mainframe software pioneer Mario Morino, Tim O'Reilly writes 'It's important for the open source community to look more at the software heritage of the mainframe era.' O'Reilly might want to take a look at how Marino's own MICS software has been used since the 80's to automatically charge IBM mainframe users for printed material that could be ordered from PC clients with a single action by using billing and shipping information that was previously stored on a Mainframe server. The whole process might seem oddly familiar."

An anonymous reader writes "Performance. It's the one aspect of the Java platform that continually takes abuse. But the overwhelming success of the platform on other fronts makes performance issues worth serious investigation. In this article, Intrepid optimizers Jack Shirazi and Kirk Pepperdine, Director and CTO of JavaPerformanceTuning.com, look at compilation speed, exceptions, and heap size tuning."

Haider writes "IBM has published two TPC-H benchmarks at the 100GB and 300GB scale factors (meaning the raw data in the database). The results are published at www.tpc.org/tpch/results/tpch_perf_results. The two results were published with exactly the same hardware and show scalability of the solution as more data is put on it. The system was a cluster of 8 2-way nodes running 2GHz AMD Opteron cpus with 6 GB of memory on each node. The OS was SLES 8 for AMD, and the database was 64-bit DB2 for Linux. The details of this solution are described in an article at infoworld.com."

prostoalex writes "Peter Seebach decided to build his own Linux-based 802.11b wireless access point. The article on IBM DeveloperWorks talks about the hardware and software requirements, implementing the operating system on the CompactFlash card, loading Apache and Perl onto the server. The build-it-yourself wireless point is not going to be cheaper than commercially available products, but its educational value is immense." And HaeMaker writes "We have all seen the 802.11b/g booster made from a Pringles can. Well, these guys have taken the idea, put some math behind it to find the optimal can size and have turned it in to a cool product."

An anonymous reader writes "Although the C language has been around for close to 30 years, its appeal has not yet worn off. It continues to attract a large number of people who must develop new skills for writing new applications, or for porting or maintaining existing applications. This article provides a set of guidelines that can help you with your coding."

An anonymous reader writes "There's nothing quite like command-line tools for handling large batches of tasks, and image manipulations are no exception. Web developers and administrators will appreciate the ability to handle large numbers of files easily, either at the command line or in scripts. This article presents the ImageMagick suite, a Linux toolkit for sizing, rotating, converting, and otherwise manipulating images, in a huge number of formats, whether one or a hundred at a time."

theodp writes "On Tuesday, the USPTO issued U.S. patent no. 6,594,674 to Microsoft for a System and method for creating multiple files from a single source file, which describes a fundamental IBM Mainframe file structure, the Partitioned Data Set, that's been around since the 60's and is familiar to virtually anyone who's used a mainframe text editor in the past five decades. To the amazement of readers of an IBM newsgroup, neither Microsoft nor the USPTO examiners seem to be aware of the existence of the Mainframe-based prior art, which is not cited in the patent."

jjaimon writes "There is a document on different package formats used in Linux/Unix systems. Worth reading." Another reader sends in this guide to creating Debian packages which seems apropos here.

An anonymous reader writes "This article is one of the first to discuss wireless robotics from an integrated approach. It explains the ins and outs of wireless robots: their components, their shortcomings, and how they can interact in a competitive or cooperative team within professional environments. Learn how smarter robots can relieve us of the most tedious -- and dangerous -- tasks."

Lawrence Person writes "This article on Low End Mac talks about why the PowerPC 970 is so fast, covering its superiority to Intel chips in Multiply Accumulate, double precision arithmetic, and Fast Fourier Transforms, among other operations. A short, clear article for those who don't have the time to wade through Parts 1 and 2 of Ars Technica's exceptionally detailed dissection of the 970/G5." Trollaxor writes "IBM has a neat two-page history of the PowerPC architecture, detailing its evolution from the first RS/6000 chipsets in 1990, through the POWER ISA, and into the processors that we know and use today. A very interesting read."

Lawrence Person writes "This article on Low End Mac talks about why the PowerPC 970 is so fast, covering its superiority to Intel chips in Multiply Accumulate, double precision arithmetic, and Fast Fourier Transforms, among other operations. A short, clear article for those who don't have the time to wade through Parts 1 and 2 of Ars Technica's exceptionally detailed dissection of the 970/G5." Trollaxor writes "IBM has a neat two-page history of the PowerPC architecture, detailing its evolution from the first RS/6000 chipsets in 1990, through the POWER ISA, and into the processors that we know and use today. A very interesting read."

Ursus Maximus writes "If you have read an introductory book or two about Python programming, but you are far from being an expert, then you will benefit a lot from reading this book. If you are a competent programmer in any other language, you will benefit from this book. If you are an expert Python programmer, you will also benefit from this book." Ursus Maximus's review continues below. Text Processing in Python author David Mertz pages 520 publisher Addison Wesley rating 10 reviewer Ursus Maximus ISBN 0321112547 summary How to use Python to process text.

As you probably know, there are many good introductory texts about Python. This is not one of them, for this is an advanced book, but not an inaccessible one. David Mertz has a unique style and focus that we have become familiar with from his series of articles on the IBM Developer Network. Dr. Mertz is more interested in facilitating our learning process than in lecturing us, and rather than fill his pages with impressive examples designed to illustrate his expertise, he gently guides us by offering subtle yet important examples of code and analysis that makes us think for ourselves.

He has a special talent for programming in the functional style, and this is a great introduction to that style of Python programming. Thus, this is also a good guide to using the newer features introduced into Python in the last few revisions, which often facilitate the functional style of programming.

The text includes, in an appendix, a 40 page tutorial covering the basic Python language. This tutorial is, like the book, unique in its approach and is worthwhile even for experienced Pythonistas, as it sheds light on some of the underlying ideas behind the syntax and semantics, and it also illustrates the functional style of programming, which is sometimes quite useful when doing text processing. And, despite its many other virtues, this is a book about text processing.

Chapter 1 covers the Python basics, but with a particular eye towards those features most critical and useful for text processing. Chapter 2 covers the basic string operations as found in the string module and the newer built-in string functions. Chapter three is about Regular Expressions, and, although I am shy about regexes because of their relative complexity, I am very glad to have read this chapter and will no longer be intimidated when regexes are the correct approach to take! Chapter 4 is on Parsers and State machines, which are important for processing nested text, as in everyday HTML, XML and the like. This chapter is not as esoteric as its title may sound to relative newbies (like myself), as it does offer useful ideas and principles for dealing with HTML. How much more useful can a topic be than that? It is true that a deep understanding of this subject may be beyond myself and other relative duffers, but this chapter has much to offer those like me and I am sure much more to offer professionals.

Chapter 5 is on Internet tools and techniques, and this a good example of how text processing touches every important area of computer programming. We manipulate text for email, newsgroups, CGI programs, HTML and many other aspects of net programming. A good summary of XML programming is included, as well as useful synopses of other Python internet modules, from a text processing point of view.

Appendix A is the aforementioned selective and short review of Python basics. Appendix B is a ten page Data Compression primer that is quite educational. Appendix C offers the same good service for Unicode, and Appendix D covers the author's own software, a state machine for adding markup to text, which is backed up by his extensive web site that has a lot of free software to support those doing extensive text processing. Lastly, Appendix E is a Glossary for technical terms from the book. This is very much an educational book, and would be suitable for classroom work at the University level, beyond the introductory programming level; in fact, as part of a curriculum to teach programming using Python at the University level, this would be an excellent text for the second course.

One of the highlights of the book is that each chapter is concluded with a problem and discussion section. These are of the highest quality I have encountered in computer texts. Rather than overwhelming the reader with a large number of problems, the author has obviously given a lifetime of thought in coming up with a few key problems that are meant to stimulate thought, creativity, and ultimately understanding and growth in the reader. I will be coming back to the problems often, as they cannot be absorbed quickly anyway; they require thought. These would be most useful in a classroom environment; but as they are accompanied by excellent discussion material, and backed up by the author's web site, the individual reader will be well served also.

The book is more than the sum of its parts. It will be a most useful reference source for when I am doing various text related tasks for some time to come, and it was also a delightful and educational quick read in the here and now. It also amply illustrates the centrality of text processing in all areas of computer science, and I am confident that the book will be useful and educational for all programmers, whatever their area of expertise.

To sum it all up, this book is educational. It is also beautifully bound and printed, and excellently written. I rate it five stars, my highest rating, and heartily recommend its purchase.

You can purchase Text Processing with Python from bn.com. Slashdot welcomes readers' book reviews -- to see your own review here, read the book review guidelines, then visit the submission page.

Trollaxor writes "The June issue of IBM's PowerPC Processor News features an article on the latest G3, Big Blue's PowerPC 750GX. The chip, which begins sampling next month, runs at 1.1 GHz and has 1 megabyte of on-chip L2 cache. Could this be Apple's next speedbump to the iBook?" Or, maybe, they will kill the iBook altogether in favor of the 12" AlBook.

Trollaxor writes "The June issue of IBM's PowerPC Processor News features an article on the latest G3, Big Blue's PowerPC 750GX. The chip, which begins sampling next month, runs at 1.1 GHz and has 1 megabyte of on-chip L2 cache. Could this be Apple's next speedbump to the iBook?" Or, maybe, they will kill the iBook altogether in favor of the 12" AlBook.

Justen writes "Terra Soft, the people behind Yellow Dog Linux (YDL), announced that they will be supporting the new Power Mac G5. Since they are an Apple Authorized Reseller, you can purchase your Power Mac G5 through Terra Soft and have YDL pre-installed on a separate partition from Mac OS X. According to Terra Soft, 'as Yellow Dog Linux was in 2000 enabled for the IBM Power3 by IBM Lab and Linuxcare, and subsequently for the Power4, the effort to support the 970-based Apple computers is anticipated to be completed with relative ease.' Life is good. Anyone wanna loan me $2,000?"

Justen writes "Terra Soft, the people behind Yellow Dog Linux (YDL), announced that they will be supporting the new Power Mac G5. Since they are an Apple Authorized Reseller, you can purchase your Power Mac G5 through Terra Soft and have YDL pre-installed on a separate partition from Mac OS X. According to Terra Soft, 'as Yellow Dog Linux was in 2000 enabled for the IBM Power3 by IBM Lab and Linuxcare, and subsequently for the Power4, the effort to support the 970-based Apple computers is anticipated to be completed with relative ease.' Life is good. Anyone wanna loan me $2,000?"

An anonymous reader writes "Here's a good article that shows you how to install and set up the kernel debugger (KDB) to trace Linux kernel execution and examine memory and data structures. The best part is, you don't need a separate machine for debugging."

An anonymous reader writes "Being ignorant of network vulnerabilities is a happy condition for only so long. Ignorance is bliss, right up until someone with rogue access drives away with your company secrets. This article covers information about AirTraf, an open source package, which performs a number of tasks, such as determining the Service Set Identifier of the access points, and the channel it is operating under. It can tell how many wireless nodes are connected to a given access point, as well as that point's total load. AirTraf is capable, too, of polling a number of sniffers through a central polling server in order to collect the most current information. The least of your fears should be the leeching of your Internet connectivity. Industrial espionage is a growing reality that you must confront."

An anonymous reader writes "This tutorial shows how to combine Samba and GRUB to build a compact, highly adaptable, cross-platform test network, capable of booting and networking a large number of operating systems on a small number of machines. Though Samba and GRUB can manage many different operating systems, this tutorial focuses on Linux and Windows." Reg required on the story.

An anonymous reader writes "Performance Inspector puts your finger on the pulse of your C/C++ and Java code, helping you nail down performance bottlenecks and problems with Linux kernel interaction. The suite of tools includes sample-based profiling, monitoring at the thread level, and more."

An anonymous reader writes "A number of IBM's computers have been available with an "embedded security subsystem (ESS)" for some time now. This site lists three research papers regarding the new TCPA (Trusted Computing Platform Initiative) security chip developed by IBM, including the full GPL-ed source code to a Linux driver for this chip. In particular, the 'Why TCPA?' paper claims that IBM's TCPA chip is in fact of extremely limited use for DRM, as it contains no tamper resistance; the chip is designed to fend off software attacks, not physical attacks. An interesting take from a company with very solid products."

An anonymous reader writes "A number of IBM's computers have been available with an "embedded security subsystem (ESS)" for some time now. This site lists three research papers regarding the new TCPA (Trusted Computing Platform Initiative) security chip developed by IBM, including the full GPL-ed source code to a Linux driver for this chip. In particular, the 'Why TCPA?' paper claims that IBM's TCPA chip is in fact of extremely limited use for DRM, as it contains no tamper resistance; the chip is designed to fend off software attacks, not physical attacks. An interesting take from a company with very solid products."

An anonymous reader writes "Urban legends are kind of like mind viruses; even though we know they are probably not true, we often can't resist the urge to retell them (and thus infect other gullible "hosts") because they make for such good storytelling. Most urban legends have some basis in fact, which only makes them harder to stamp out. Unfortunately, many pointers and tips about Java performance tuning are a lot like urban legends -- someone, somewhere, passes on a "tip" that has (or had) some basis in fact, but through its continued retelling, has lost what truth it once contained. This article examines some of these urban performance legends and sets the record straight."

daveschroeder writes "Jon "Hannibal" Stokes has posted a long-awaited, very detailed analysis of the IBM PowerPC 970 at Ars Technica. Notable quote: 'The 970 was made for Apple'."

functor writes "Ars Technica's Jon Stokes has a treatise up covering the microarchitecture of the high-performance 64-bit PowerPC 970 microprocessor, due to be released by the end of the year, that goes over in detail how this chip is put together, and how we can expect it to perform. This is the follow-up to Stokes' article detailing the PPC 970's design philosophy. 'It appears to hold quite a bit of promise in bolstering Apple's currently almost obsolescent product line, and it appears to have been designed explictly to fulfil Apple's requirements. To say the least, the second half of this year looks to be pretty interesting as Apple's product line promises to become competitive performance-wise with IA-32 and x86-64-based PCs again.''

An anonymous reader writes "Grid computing is the "next big thing," and this article's goal is to provide a "10,000-foot view" of key concepts. This article relates many Grid computing concepts to known quantities for developers, such as object-oriented programming, XML, and Web services. The author offers a reading list of white papers, articles, and books where you can find out more about Grid computing."

Pharmboy writes "I haven't seen enough info on the new IBM PowerPC 970 CPU expected shortly. I found some info direct from IBM here plus more info in a couple other places. For those of us wanting to get away from Windows, but feel Linux is still not ready for the desktop yet, this might make Apple a more viable alternative. This also raises issues about the potential partnership with Apple and AMD. Will we see Mac OS X running on two different platforms/CPUs? Could we be that lucky?"

dW writes "Write down your most private information, and then throw it out the window. That's what wireless data transfers are doing when they're not secured. The deployment of various wireless LANs and Wi-Fi networks or configurations are under consideration by many organizations, and network security is a major concern. This article discusses problems, tips, and best bets for 802.11x's elusive security."

dW writes "Write down your most private information, and then throw it out the window. That's what wireless data transfers are doing when they're not secured. The deployment of various wireless LANs and Wi-Fi networks or configurations are under consideration by many organizations, and network security is a major concern. This article discusses problems, tips, and best bets for 802.11x's elusive security."

dW writes "The Australian hacker has been working on pushing Samba beyond the POSIX world and figuring out what work needs to be done to get Samba to support new filesystems such as XFS, ext3, and Storage Tank. The answer is nothing less than a complete rewrite of Samba's smbd code, which has become his latest pet project. Here's an interview with Andrew Tridgell on his latest Samba rewrite."

dW writes "The Australian hacker has been working on pushing Samba beyond the POSIX world and figuring out what work needs to be done to get Samba to support new filesystems such as XFS, ext3, and Storage Tank. The answer is nothing less than a complete rewrite of Samba's smbd code, which has become his latest pet project. Here's an interview with Andrew Tridgell on his latest Samba rewrite."

'lonzo writes "Version 1.0 Fiasco, a GPL re-implementation of the L4 microkernel has recently been released. This microkernel is designed to be a flexible hardware abstraction layer rather than YetAnotherCloneOfUnix. Its 'mechanism not policy' design allows far more opportunities for *ghasp* innovation than any of the Unix clones. It also provides people with an alternative to the macrokernel design of Linux. Get your copy here. Linux has already been ported to this OS, get it here, and another port."

Jules V.D. writes "CERN and IBM today announced that IBM is joining the CERN openlab for DataGrid applications to collaborate in creating a massive data-management system built on Grid computing.IBM's innovative storage virtualization and file management technology, will play a pivotal role in this collaboration, which aims to create a data file system far larger than exists today to help scientists at CERN understand some of the most fundamental questions about the nature of matter and the Universe."

UnanimousCoward writes "This Internet Week article describes a research project by Scott Fahlman that looks to limit spam using e-stamps. Here is more detailed description of the system under his CMU homepage along with a link to the original paper." As crappy as it sounds, charging some tiny fee per email would cut spam dramatically. 207 of the buggers so far today. Hundreds of megs a month. I'd love to see something done.

jscribner writes "Scientific American is running a feature on IBM Research's Text-to-Speech technology. It discusses the current state of affairs in this field, and describes IBM's phoneme based 'Supervoices' approach. The IBM site provides a demonstration, allowing users to enter text to be rendered to speech, as well as providing several examples in other languages."

jscribner writes "Scientific American is running a feature on IBM Research's Text-to-Speech technology. It discusses the current state of affairs in this field, and describes IBM's phoneme based 'Supervoices' approach. The IBM site provides a demonstration, allowing users to enter text to be rendered to speech, as well as providing several examples in other languages."

jscribner writes "Scientific American is running a feature on IBM Research's Text-to-Speech technology. It discusses the current state of affairs in this field, and describes IBM's phoneme based 'Supervoices' approach. The IBM site provides a demonstration, allowing users to enter text to be rendered to speech, as well as providing several examples in other languages."

dW writes "This article is about Stow, a software installation management utility for Linux that offers a number of advantages over the tried-and-true Red Hat and Debian package management systems. With Stow, you can package applications in standard tar files and keep application binaries logically arranged for easy access."

dW writes "This article is about Stow, a software installation management utility for Linux that offers a number of advantages over the tried-and-true Red Hat and Debian package management systems. With Stow, you can package applications in standard tar files and keep application binaries logically arranged for easy access."

A reader writes:" Persistence for object-oriented systems is an incredibly cumbersome task to deal with when building many kinds of applications: mapping objects to tables, XML, flat files or use some other non-OO way to represent data destroys encapsulation completely, and is generally slow, both at development and at runtime. The Object Prevalence concept, developed by the Prevayler team, and implemented in Java, C#, Smalltalk, Python, Perl, PHP, Ruby and Delphi, can be a great a solution to this mess. The concept is pretty simple: keep all the objects in RAM and serialize the commands that change those objects, optionally saving the whole system to disk every now and then (late at night, for example). This architecture results in query speeds that many people won't believe until they see for themselves: some benchmarks point out that it's 9000 times faster than a fully-cached-in-RAM Oracle database, for example. Good thing is: they can see it for themselves. Here's an article about it, in case you want to learn more."

kuwan writes "IBM has just released a press release that indicates they have the new PowerPC 970 running at 1.8 to 2.5 GHz making it 'the fastest PowerPC so far.' IBM's original estimates were to have the chip running at 1.4 to 1.8 GHz at introduction, so this is very good news for those of us hoping Apple will use this as their next-generation chip."