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  • Why do I bother with RAID 10 ?

    - by GrumpyOldDBA
    Before I post anything I just want to clarify what I mean by RAID 10 , this is sets of mirrored pairs that have been striped as against a RAID 0 which has been mirrored. I've just had a disk failure in the data array for one of my dev servers, it's an eight disk raid 8, no real worries, replace disk and off we go - but no - the HP engineers told me from the diagnostics ( done to ensure I got the right replacement under warranty ) that not only had a disk failed but I'd lost all the data...(read more)

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  • The Tortoise and the Hare

    <b>Legal World and Childhood Dreams:</b> "Summary: The paper explains how computer software is protected and the relationship between open source software and copyright."

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  • Any multiplayer webgame engine based on Flex

    - by Hongyu Ouyang
    My team is developing a multiplayer webgame (like a virtual world) in a short time(several months using after-school time), and I wonder if there are any webgame engine based on Flex. When I googled it I got many results related to HTML5, but I doubted if it is suitable for quick development. Do anyone have the experience of developing a webgame using A good engine? Are there any engine recommended? I prefer actionscript and flex to a javascript or HTML5 solution.

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  • How to implement efficient Fog of War?

    - by Cambrano
    I've asked a question how to implement Fog Of War(FOW) with shaders. Well I've got this working. I use the vertex color to identify the alpha of a single vertex. I guess the most of you know what the FOW of Age of Empires was like, anyway I'll shortly explain it: You have a map. Everything is unexplored(solid black / 100% transparency) at the beginning. When your NPC's / other game units explore the world (by moving around mostly) they unshadow the map. That means. Everything in a specific radius (viewrange) around a NPC is visible (0%transparency). Anything that is out of viewrange but already explored is visible but shadowed (50% transparency). So yeah, AoE had relatively huge maps. Requirements was something around 100mhz etc. So it should be relatively easy to implement something to solve this problem - actually. Okay. I'm currently adding planes above my world and set the color per vertex. Why do I use many planes ? Unity has a vertex limit of 65.000 per mesh. According to the size of my tiles and the size of my map I need more than one plane. So I actually need a lot of planes. This is obviously pita for my FPS. Well so my question is, what are simple (in sense of performance) techniques to implement a FOW shader? Okay some simplified code what I'm doin so far: // Setup for (int x = 0; x < (Map.Dimension/planeSize); x++) { for (int z = 0; z < (Map.Dimension/planeSize); z++) { CreateMeshAt(x*planeSize, 3, z*planeSize) } } // Explore (is called from NPCs when walking for example) for (int x = ((int) from.x - radius); x < from.x + radius; x ++) { for (int z = ((int) from.z - radius); z < from.z + radius; z ++) { if (from.Distance(x, 1, z) > radius) continue; _transparency[x/tileSize, z/tileSize] = 0.5f; } } // Update foreach(GameObject plane in planes){ foreach(Vector3 vertex in vertices){ Vector3 worldPos = GetWorldPos(vertex); vertex.Color = new Color(0,0,0, _transparency[worldPos.x/tileSize, worldPos.z/tileSize]); } } My shader just sets the transparency of the vertex now, which comes from the vertex color channel

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  • How can I make sure that I'm actually learning how to program rather than simply learning the details of a language?

    - by Ryan
    I often hear that a real programmer can easily learn any language within a week. Languages are just tools for getting things done, I'm told. Programming is the ultimate skill that must be learned and mastered. How can I make sure that I'm actually learning how to program rather than simply learning the details of a language? And how can I develop programming skills that can be applied towards all languages instead of just one?

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  • Speaking at Mix11

    - by Dennis Vroegop
    In April Microsoft will hold the next MIX event. MIX was usually targeted at web designers and developers but has grown over the years to be more a general conference focused on the web and devices. In other words: everything the normal consumer might encounter. It’s not your typical developers conference, although you’ll find many developers there as well. But next to the developers you’ll probably run into designers and user experience specialists as well. This year I am proud to say that I will be one of the people presenting there. Together with all the Surface MVP’s in the world (sounds impressive, but there are only 7 of us) we’ll host a panel discussion on all things Surface, NUI and everything else that matches those subjects. Here’s what the abstract says: The Natural User Interface (NUI) is a hot topic that generates a lot of excitement, but there are only a handful of companies doing real innovation with NUIs and most of the practical experience in the NUI style of design and development is limited to a small number of experts. The Microsoft Surface MVPs are a subset of these experts that have extensive real-world experience with Microsoft Surface and other NUI devices. This session is a panel featuring the Microsoft Surface MVPs and an unfiltered discussion with each other and the audience about the state of the art in NUI design and development. We will share our experiences and ideas, discuss what we think NUI will look like in the near future, and back up our statements with cutting-edge demonstrations prepared by the panelists involving combinations of Microsoft Surface 2.0, Kinect, and Windows Phone 7. We, as Surface MVPs think we are more than just Surface oriented. We like to think we are more NUI MVP’s. But since that’s not a technology with Microsoft you can’t actually become a NUI MVP so Surface is the one that comes the closest. We are currently working on the details of our session but believe me: it will blow you away. Several people we talked to have said this could potentially be the best session of Mix. Quite a challenge, but we’re up for it! Of course I won’t be telling you exactly what we’re going to do in Las Vegas but rest assured that when you visit our session you’ll leave with a lot of new ideas and hopefully be inspired to bring into practice what you’ve seen. Even if the technology we’ll show you isn’t readily available yet. So, if you are in Las Vegas between April 12th and 14th, please join Joshua Blake, Neil Roodyn, Rick Barraza, Bart Roozendaal, Josh Santangelo, Nicolas Calvi and myself for some NUI fun! See you in Vegas! Tags van Technorati: mix11,las vegas,surface,nui,kinecct

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  • Dynamic Environment Creation

    - by Jack
    I was wondering, I'm thinking on a more small-scale, abstracted level, but how does one create a dynamic environment a la Minecraft? In specific, I'm thinking of the world as a 3 dimensional array of block objects, how is it made so that large features such as oceans are created? The language isn't important, I'm thinking on a conceptual level, but if it helps, I use C# or C++. Thanks for any help!

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  • How can I evaluate a candidate's knowledge of Html/CSS during an interview?

    - by webnoob
    I am trying to determine some good interview questions to assess the ability of people coming in for a Html/CSS job, however that topic is extremely broad, and I'm not sure what sort of questions I can ask to properly evaluate someone's HTML/CSS knowledge. What sort of questions can I ask to evaluate a candidate's Html/CSS abilities during an interview? Ideally I would like to ask few questions and then give them a real life scenario to combat.

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  • What is enterprise software, exactly?

    - by good_computer
    I don't understand the difference between "normal" software and enterprise software. Even after reading these... "Enterprise Software" on Wikipedia "Enterprise Software Is Sexy Again" on Techcrunch "The Great Enterprise Software Swindle" on Coding Horror I can't really wrap my head around the real differences. Is there any difference at all between the two? Why do people say enterprise software sucks?

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  • Microsoft SQL Server 2008 R2 Administration Cookbook

    - by ssqa.net
    Its one year on my first book released, keeping aside the financial gains from this book I'm more happy to achieve one of the important goals from my career. This is something big in my life to announce, it gives immensive pleasure and happiness to share about my first book (hard paper) and eBook release, titled : Microsoft SQL Server 2008 R2 Administration Cookbook is released and out now. share my experience and task based real-world best practices in a cookbook style. My thanks to the technical...(read more)

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  • Ubuntu full installation on Chromebook

    - by user193385
    Guys I am quite new here :) I just bought a Google Chromebook HP 14 and I am very happy to be honest. But I do miss my Ubuntu OS :), and the options available to use aren't a real native OS system but adaptations that sometimes do not work :( Does anyone have an idea how to install with dual boot Ubuntu alongside Chrome OS. (I hope I am not repeating any questions here) Thank so much for your time guys :) Gustavo

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  • Adding interactive graphical elements to text-based browser game with HTML5

    - by st9
    I'm re-writing an old virtual world/browser based game. It is text and HTML form based with some static graphics. The client is HTML and JS. I want to introduce some interactive graphical elements to certain parts of the game, for example a 'customise character' page, with hooks to server side and local data storage. I want to use HTML5/JS, what is the best approach to designing the web-site? For example could I use Boilerplate and then embed these interactive elements in the page? Thanks

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  • Is ASP.NET MVC completely (and exclusively) based on conventions?

    - by Mike Valeriano
    --TL;DR Is there a "Hello World!" ASP.NET MVC tutorial out there that doesn't rely on conventions and "stock" projects? Is it even possible to take advantage of the technology without reusing the default file structure, and start from a single "hello_world.asp" file or something (like in PHP)? Am I completely mistaken and I should be looking somewhere else, maybe this? I'm interested in the MVC framework, not Web Forms --Background I've played a bit with PHP in the past, just for fun, and now I'm back to it since web development became relevant for me once again. I'm no professional, but I try to gain as much knowledge and control over the technology I'm working with as possible. I'm using Visual Studio 2012 for C# - my "desktop" language of choice - and since I got the Professional Edition from Dreamspark, the Web Development Tools are available, including ASP.NET MVC 4. I won't touch Web Forms, but the MVC Framework got my attention because the MVC pattern is something I can really relate to, since it provides the control I want but... not quite. Learning PHP was easy - and right form the start I could just create a "hello_world.php" file and just do something like this for immediate results: <!-- file: hello_world.php --> <?php> echo "Hello World!"; <?> But I couldn't find a single ASP.NET (MVC) tutorial out there (I'll be sure to buy one of the upcoming MVC 4 books, only a month away or so) that would start like that. They all start with a sample project, building up knowledge from the basics and heavily using conventions as they go along. Which is fine, I suppose, but it's now the best way for me to learn things. Even the "Empty" project template for a new ASP.NET MVC 4 Application in VS2012 is not empty at all: several files and folders are created for you - much like a new C# desktop application project, but with C# I can in fact start from scratch, creating the project structure myself. It is not the case with PHP: I can choose from a plethora of different MVC frameworks I can just create my own framework I can just skip frameworks altogether, and toss random PHP along with my HTML on a single file and make it work I understand the framework needs to establish some rules, but what if I just want to create a single page website with some C# logic behind it? Do I really need to create a whole bloat of files and folders for the sake of convention? Also, please understand that I haven't gotten far on any of those tutorials mainly because of this reason, but, if that's the only way to do it, I'll go for it using one of the books I've mentioned before. This is my first contact with ASP.NET but from the few comparisons I've read, I believe I should stay the hell away from Web Forms. Thank you. (Please forgive the broken English - it is not my primary language.)

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  • Why do companies opensource their code?

    - by Fahad Uddin
    I have seen many big companies like Facebook, Twitter and LinkedIn opensource their code. I was curious to understand why would any company share their code to the world. One reason I understood that it makes the people better understand their API. Still, I am a little confused as any other company/person can use their code to find a vulnerability inside and get their site down. Why do such big companies take this risk then?

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  • Attunity Oracle CDC Solution for SSIS - Beta

    We in no way work for Attunity but we were asked to test drive a beta version of their Oracle CDC solution for SSIS.  Everybody should know that moving more data than you need to takes too much time and uses resources that may better be employed doing something else.  Change data Capture is a technology that is designed to help you identify only the data that has had something done to it and you can therefore move only what is needed.  Microsoft have implemented this exact functionality into SQL server 2008 and I really like it there.  Attunity though are doing it on Oracle. DISCLAIMER: This is a BETA release and some of the parts are a bit ugly/difficult to work with.  The idea though is definitely right and the product once working does exactly what it says on the tin.  They have always been helpful to me when I have had a problem with the product and if that continues then beta testing pain should be eased somewhat. In due course I am going to be doing some videos around me using the product.  If you use Oracle and SSIS then give it a go. Here is their product description.   Attunity is a Microsoft SQL Server technology partner and the creator of the Microsoft Connectors for Oracle and Teradata, currently available in SQL Server 2008 Enterprise Edition. Attunity released a beta version of the Attunity Oracle-CDC for SSIS, a product that integrates continually changing Oracle data into SSIS, efficiently and in real-time. Attunity designed the product and integrated it into SSIS to create the simple creation of change data capture (CDC) solutions, accelerate implementation time, and reduce resources and costs. They also utilize log-based CDC so the solution has minimal impact on the Oracle source system. You can use the product to implement enterprise-class data replication, synchronization, and real-time business intelligence (BI) and data warehousing projects, quickly and efficiently, leveraging their existing SQL Server investments and resource skills. Attunity architected the product specifically for the Microsoft SSIS developer community and the product is available for both SQL Server 2005 and SQL Server 2008. It offers the following key capabilities: · Log-based, non-intrusive Oracle CDC · Full integration into SSIS and the Business Intelligence Developer Studio · Automatic generation of SSIS packages for CDC as well as full-loads of Oracle data · Filtering of Oracle tables and columns at the source · Monitoring and control of CDC processing Click to learn more and download the beta.

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  • How to create posts in asp.net ..?? [closed]

    - by ntechi
    I am doing my final year project and have decided to make a website in asp.net. For that I'll be using Micrsoft Visual Studio 2008. I'm making a Real ESTATE properties website. I want to know how to create posts in asp.net( like in WORDPRESS) and also when I hit SEARCH it should search for the desired keyword or the searched post. If post is not possible then it should display pages....Please help as I'm a beginner..

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  • Are there deprecated practices for multithread and multiprocessor programming that I should no longer use?

    - by DeveloperDon
    In the early days of FORTRAN and BASIC, essentially all programs were written with GOTO statements. The result was spaghetti code and the solution was structured programming. Similarly, pointers can have difficult to control characteristics in our programs. C++ started with plenty of pointers, but use of references are recommended. Libraries like STL can reduce some of our dependency. There are also idioms to create smart pointers that have better characteristics, and some version of C++ permit references and managed code. Programming practices like inheritance and polymorphism use a lot of pointers behind the scenes (just as for, while, do structured programming generates code filled with branch instructions). Languages like Java eliminate pointers and use garbage collection to manage dynamically allocated data instead of depending on programmers to match all their new and delete statements. In my reading, I have seen examples of multi-process and multi-thread programming that don't seem to use semaphores. Do they use the same thing with different names or do they have new ways of structuring protection of resources from concurrent use? For example, a specific example of a system for multithread programming with multicore processors is OpenMP. It represents a critical region as follows, without the use of semaphores, which seem not to be included in the environment. th_id = omp_get_thread_num(); #pragma omp critical { cout << "Hello World from thread " << th_id << '\n'; } This example is an excerpt from: http://en.wikipedia.org/wiki/OpenMP Alternatively, similar protection of threads from each other using semaphores with functions wait() and signal() might look like this: wait(sem); th_id = get_thread_num(); cout << "Hello World from thread " << th_id << '\n'; signal(sem); In this example, things are pretty simple, and just a simple review is enough to show the wait() and signal() calls are matched and even with a lot of concurrency, thread safety is provided. But other algorithms are more complicated and use multiple semaphores (both binary and counting) spread across multiple functions with complex conditions that can be called by many threads. The consequences of creating deadlock or failing to make things thread safe can be hard to manage. Do these systems like OpenMP eliminate the problems with semaphores? Do they move the problem somewhere else? How do I transform my favorite semaphore using algorithm to not use semaphores anymore?

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  • DRBD and MySQL - Virtualbox Setup

    DRBD is a Linux project that provides a real-time distributed filesystem. Sean Hull demonstrates how to use Sun's virtualbox software to create a pair of VMs, then configure those VMs with DRBD, and finally install and test MySQL running on volumes sitting on DRBD.

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  • DRBD and MySQL - Virtualbox Setup

    DRBD is a Linux project that provides a real-time distributed filesystem. Sean Hull demonstrates how to use Sun's virtualbox software to create a pair of VMs, then configure those VMs with DRBD, and finally install and test MySQL running on volumes sitting on DRBD.

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  • Back from the OData Roadshow

    - by Fabrice Marguerie
    I'm just back from the OData Roadshow with Douglas Purdy and Jonathan Carter. Paris was the last location of seven cities around the world.If there was something you wanted to know about OData, that was the place to be!These guys gave a great tour around OData. I learned things I didn't know about OData and I was able to give a demo of Sesame to the audience.More ideas and use cases popping-up!

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  • Set Up A Wii Internet Connection

    If you have a Nintendo Wii Internet connection, it will allow you to play games with friends across the world, download games, update your system, send email to friends, and more. With these given st... [Author: Susan Brown - Computers and Internet - May 08, 2010]

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  • June 17, 2010 Webcast - 5 Security Tips To Reduce Cost Using Oracle Directory Services

    - by mark.wilcox
    We're delivering another webcast on June 17 (next week!): 5 Security Tips To Reduce Cost Using Oracle Directory Services  Organizations with business units spread around the world face costly and time consuming security concerns. However, many of these companies are forced to deal with increased scrutiny and security demands while resources are reduced. This live webcast focuses on concrete ways IT organizations can use directory services to do more with less.  Posted via email from Virtual Identity Dialogue

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  • Are factors such as Intellisense support and strong typing enough to justify the use of an 'Anaemic Domain Model'?

    - by David Osborne
    It's easy to accept that objects should be used in all layers except a layer nominated as a data layer. However, it's just as easy to end-up with an 'anaemic domain model' that is just an object representation of data with no real functionality ( http://martinfowler.com/bliki/AnemicDomainModel.html ). However, using objects in this fashion brings the benefit of factors such as Intellisense support, strong typing, readability, discoverability, etc. Are these factors strong arguments for an otherwise, anaemic domain model?

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  • Start Your Engines

    - by Richard Jones
    Just passing on the good news from MIX Keynote yesterday. The CTP Developers Kit for Windows Phone 7 Series, is available here. http://www.microsoft.com/downloads/details.aspx?FamilyID=2338b5d1-79d8-46af-b828-380b0f854203&displaylang=en#filelist First impressions are great.   Hello World up and running in under 2 minutes - Technorati Tags: Windows Pgone 7 Series

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  • Scorched 3D is one hot battle game

    <b>Sourceforge:</b> "Scorched 3D is a modernization of the classic DOS game Scorched Earth. It's a simple turn-based artillery game and a real-time strategy game in which players can counter each other's weapons with creative accessories, shields, and tactics."

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