Today we have Part 2 in our exciting 2 part series about the infrastructure that powers Slashdot. Last week Uriah told us all about the hardware powering the system. This week, Jamie McCarthy picks up the story and tells us about the software... from pound to memcached to mysql and more. Hit that link and read on.

Last week hundreds of you posted questions for Slashdot's CmdrTaco, AKA Rob Malda. Today we present his answers to 10 of the highest-moderated questions. CT: You can continue to sign up for 10 year anniversary parties but we're already working on shipping shirts so you won't be able to get a care package... but you can still try to run for the big grand prize by just taking videos of pictures or just doing something cool at your parties to prove that we should have been there.

Michael J. Ross writes "Every Internet user's impressions of a Web site is greatly affected by how quickly that site's pages are presented to the user, relative to their expectations — regardless of whether they have a broadband or narrowband connection. Web developers often assume that most page-loading performance problems originate on the back-end, and thus the developers have little control over performance on the front-end, i.e., directly in the visitor's browser. But Steve Souders, head of site performance at Yahoo, argues otherwise in his book, High Performance Web Sites: Essential Knowledge for Frontend Engineers." Read on for the rest of Michael's review.

When last we left off, Slashdot had grown beyond my ability to maintain it as a hobby, as well as beyond the simple DEC Alpha Multia 166 that had served it so well for the first week or two, and then immediately buckled under the traffic. Here in Part 2, we ride the wave of Slashdot's growth from early '98 until whenever my wrists get tired enough that I stop yakking until next week.

Jon Allen writes "A glance through any photography magazine will confirm that Adobe Photoshop is the accepted standard image editing software, offering almost unparalleled power and control over your images. However, costing more than many DSLR cameras, for non-professionals it can be a very hard purchase to justify (and of course for Linux users this is a moot point, as Photoshop is not available for their platform). Luckily, the free software community has provided us with an alternative. The GIMP, or Gnu Image Manipulation Program, offers a huge amount of the power of Photoshop but is available at no cost. Additionally GIMP is cross-platform, available for Windows, Mac, Linux, and Unix." Read below for the rest of Jon's review.

OldJavaHack writes "If you could start a website (with MySQL for persistence) from scratch and you had a choice of PHP5, CakePHP, or RubyOnRails — which would you choose and why? Things to consider in your decision: 1. Maturity of solution; 2. Features; 3. Size of community of skilled users (to build a team); 4. Complexity/ease of use (for neophytes to master); 5. Greatest strength of your choice, and the greatest weaknesses of the other two. Here is a comparison of capabilities."

gnalre writes "Every day it seems there is a new publication of a book on perl/python/ruby. Some languages however do not seem to get that sort of attention. One of those under-represented languages is Erlang, however for the first time in 10 years a new Erlang book has been published. As someone who had a brief flirtation with Erlang long ago, I was interested to see how the language had evolved in the intervening decade. I was also curious to re-evaluate Erlang to see what solutions it offered to the present day issues of writing reliable distributed applications." Read on for the rest of Tony's review.

randommsdev writes "Microsoft has announced the release of Windows Live ID Web Authentication. This means that WLID (formerly known as Passport) is now opened to third party websites to use as their authentication system. Any Windows Live user can potentially log in to a website that implements Web Authentication. Interestingly sample implementations are available in the Ruby, Python, Perl, and PHP open source languages amongst others — tested on openSUSE 10.2 but expected to work on any platform that supports these languages. More details are available in the SDK documentation."

TimHunter writes "I was skeptical when I first saw the title of David Berube's new book, Practical Ruby Gems, from Apress. Do Ruby programmers really need a book devoted entirely to add-on libraries? Most Ruby programmers already know about the RubyGems package management system, and most already have their set of favorite gems. About a third of the way through the book I grudgingly admitted that Rubyists might be able to use this book. After all, even long-time Ruby programmers are unlikely to know about all the gems covered in this book. So then I had a new question. Would I find something in this book that made me say 'I didn't know you can do that with Ruby!'" Read on for the rest of Tim's review.

Bob Uhl writes "I've just finished reading a review copy of O'Reilly's latest GNU/Linux title, Linux System Administration. It's a handy introduction for the beginner GNU/Linux sysadmin, and a useful addition to an experienced sysadmin's bookshelf. The book is essentially a survey of various Linux system-administration tasks: installing Debian; setting up LAMP; configuring a load-balancing, high-availability environment; working with virtualization. None of the chapters are in-depth examinations of their subjects; rather, they're enough to get you started and familiar with the concepts involved, and headed in the right direction." Read below for the rest of Bob's review.

FishWithAHammer writes "As part of my Google Summer of Code project, I'm working with WinLibre to develop a Debian-like software download system for free/open source software on the Windows platform. My reasoning is that open source software suffers from poor presentation. Most computer laymen, even those aware of open source software, often don't have any idea how to go about looking for it, but would use it if it were easier to access. What I have proposed is both a Debian-style packaging mechanism (capable of using Windows Installer MSIs or not, as the user wishes) and a software 'catalog' that takes the best aspects of Synaptic and Linspire's Click-N-Run system. Seamless, simple installation and removal of programs in as straightforward a way as apt-get (there will be a command-line tool as well). I'm posting to Slashdot to get the ideas of you lot who, while you may not be the target audience, can certainly provide insights that can be of value." Read on for more of this reader's ideas and questions.

Frequent Slashdot contributor Bennett Haselton gives the full-disclosure treatment to the widely known and surprisingly simple technique for finding treasure-troves of credit card numbers online. He points out how the credit-card companies could plug this hole at trivial expense, saving themselves untold millions in losses from bogus transactions, and saving their customers some serious hassles. Read on for Bennet's article.

jlcopeland writes "For two decades I've hated the command prompt in DOS and Windows. Inconsistencies abound and everything is a special case. The fallback on a Microsoft box has been running a Unix shell under Cygwin or installing Microsoft's own Services for Unix (or its predecessor, Softway's Interix), or by scripting in Perl, but those only get you so far. Having co-written nine years worth of trade rag columns using mostly Perl as the implementation language for the samples, and thinking of every problem that comes across my desk as an excuse to write a little bit of scripting code, I've got some well-formed views about scripting languages and what works and what doesn't. That means I've been eagerly watching the development of PowerShell since it was called Monad. It's got the advantage of being a unified command-line interface and scripting language for Windows, even if it does have a dorky name." Read the rest of Jeffrey's review.

An anonymous reader writes "This article describes techniques you can use to create new levels of usefulness in your dynamically generated charts with Perl and GD. Cook up some automatically generated graphs for your organizational meetings or live enterprise directory data. Annotate the charts with readable text that delivers more information than the standard pie chart. Using the power of GD and Perl, you can link various data and images together to create sophisticated charts that will help bring visual interest to your applications."

TimHunter writes "Peter Cooper's Beginning Ruby: From Novice to Professional has two audiences, novices with no programming experience who want to learn Ruby as their first programming language, and veterans who want to add Ruby to their programming toolkit. Cooper's response to this challenge is a solid entry in the limited arena of Ruby tutorials. Even though the early chapters are marred by the occasional reference to an advanced topic, readers will appreciate the plentiful examples and thoughtful description of the Ruby language." Read below for the rest of Tim's review.

Michael J. Ross writes "MySQL may be the most popular open source relational database management system (RDBMS) in the world, but during the first decade of its existence, it lacked support for stored programs, i.e., store procedures, functions, and triggers. The major commercial RDBMS vendors — including Oracle, IBM, and Microsoft — could point to this deficiency as reason enough to choose their proprietary systems over MySQL or any other open source system, such as PostgreSQL. But with the release of MySQL version 5.0, in October 2005, the "little database engine that could" dramatically improved its position against the competition. The most comprehensive discussion of these new capabilities is in the book MySQL Stored Procedure Programming." Read below for the rest of Michael's review

An anonymous reader writes "The SANS Software Security Institute, in conjunction with organizations such as Siemens, Symantec, Juniper, OWASP, and Virginia Tech, has announced a program for testing whether programmers know how to write secure code. The Secure Programming Skills Assessment is split into separate language families (C/C++, Java/J2EE, Perl/PHP, and ASP/.NET). Director of research Alan Paller says 'This assessment and certification program will help programmers learn what they don't know, and help organizations identify programmers who have solid security skills.' The pilot exam will be held in Washington DC in August, followed by a global rollout."

niiler writes "There is finally a usable US federal income tax program for Linux users who don't wish to file online. TaxGeek is a Mozilla-based US income tax program that includes Form 1040, Schedules A, B, C, C-EZ, D, E, K-1 (1065), SE (Short and Long), W2, Forms 8880, 8853, 8863, 8812, 5695, 4952,3903, 2106, 2106ez, 2441 with access to most other files as PDFs. It is intended to be extensible so that developers can easily add other forms that are needed without affecting the existing file formats and stored data. TaxGeek will also create PDFs of all the supported forms so that you can print them and send them in to the IRS. (PDF creation support requires the installation of Perl PDF::Reuse.) At this point, e-filing is not supported."

Coryoth writes "Design by Contract, writing pre- and post-conditions on functions, seemed like straightforward common sense to me. Such conditions, in the form of executable code, not only provide more exacting API documentation, but also provide a test harness. Having easy to write unit tests, that are automatically integrated into the inheritance hierarchy in OO languages, 'just made sense'. However, despite being available (to varying degrees of completeness) for many languages other than Eiffel, including Java, C++, Perl, Python, Ruby, Ada, and even Haskell and Ocaml, the concept has never gained significant traction, particularly in comparison to unit testing frameworks (which DbC complements nicely), and hype like 'Extreme Programming'. So why did Design by Contract fail to take off?"

Michael J. Ross writes "Of all the technical challenges faced by the typical experienced computer programmer, questions about syntax form a relatively small portion. This is especially true now that current coding editors and IDEs offer statement expansion and syntax checking. Rather, the most common type of technical challenge is understanding how to solve a specific data access or manipulation problem. Hence the growing popularity of programming "cookbooks," which are filled with "recipes," each comprising a concise statement of a focused problem, followed by a solution, with plenty of sample code to show how to implement it. For developers using the MySQL database system, the gold standard of such books is MySQL Cookbook, by Paul DuBois." Read below for the rest of Michael's review