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• Ubuntu 12.04.1 LTS breaking down and sluggish

  - by ahamza

  I am in the process of switching from Windows to a Linux based system and am currently deciding between distributions...I am currently trying Ubuntu as WUBI. I find that my experience is not very smooth and streamlined for example, crash-reports, bugs, applications taking time to run etc etc (this in spite of the fact that I am very patient and am constantly researching solution to different driver and application issues). Was wondering if this is because I am running through NTFS right now or is it just like this? Looking to switch to Linux because of its opensource nature, interest in software development in college as well as maximizing the potential of my machine. I am running an AMD quadcore-x64 2.2GHz, 6GB RAM and 750 GB HDD on an HP G6 notebook. I would appreciate any honest opinions.

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• Custom code in SharePoint

  - by Sahil Malik

  SharePoint 2010 Training: more information Microsoft launched SharePoint 2013 with great fanfare. But what stuck out was the introductory blog post by Corporate SVP of SharePoint, Jeff Teper. You can read the blogpost titled “The New SharePoint”. But one paragraph has stuck out, “Use SharePoint as an out-of-box application whenever possible - We designed the new SharePoint UI to be clean, simple and fast and work great out-of-box. We encourage you not to modify it which could add complexity, performance and upgradeability and to focus your energy on working with users and groups to understand how to use SharePoint to improve productivity and collaboration and identifying and promoting best practices in your organization.” The keywords here is “whenever possible”. The reality is, frequently it is not possible to not customize SharePoint in order to meet the customer requirements. But you must try and minimize SharePoint customization. There are many ways Read full article ....

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• High contrast theme Firefox problem

  - by user87239

  I am using the high contrast inverse theme in 12.04 as I am visually impaired. This generally works great but causes a problem in Firefox as entered text e.g into a Google search is white. As the text background is also white you cannot see what you are typing. I have read through a good thirty websites with similar issues but thus far nothing works. I have tried all the settings in Firefox like un-checking "Use System Defaults" as well as manually telling Firefox what colours to use and these setting have absolutely no effect on anything.

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• Oracle SOA Suite 11g Administrator's Handbook

  - by Antony Reynolds

  SOA Administration Book I have just received a copy of the “Oracle SOA Suite 11g Administrator's Handbook” so as soon as I have read it I will let you know what I think.  In the meantime the first thing that struck me was the author credentials, although I have never met either of them as I remember, I have read Admeds blog postings and they are a great community resource, so immediately I am well disposed towards the book.  Similarly Arun is an employee of my friend and co-author Matt Wright, and I have heard good things about him from Rubicon Red people. A first glance at the table of contents looks encouraging, I particularly like their approach to performance tuning where they give a clear concise explanation of the knobs they are using. More when I have read more.

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• Is installing Ubuntu 10.10 still a viable option?

  - by Kartik Anand

  I fell in love with ubuntu when 10.10 was released. It was the perfect OS for me, but then, the 11 and the 12 series came, and I starting hating it (Pun intended) But seriously, I want to stick to ubuntu 10.10, I have the .iso file with me. I want to go ahead and install it. My question is, since its not currently supported, what problems will I face? Will I be eligible for update? I mean atleast till the time it was supported Can I somehow get security updates and patches Will the latest software available still run on ubuntu 10.10 I don't care much about drivers, as much as I care about python, php, apache, wine and other softwares. Will the software center work?and be updates as well? What issues am I most prone to face?

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• Impact of variable-length loops on GPU shaders

  - by Will

  Its popular to render procedural content inside the GPU e.g. in the demoscene (drawing a single quad to fill the screen and letting the GPU compute the pixels). Ray marching is popular: This means the GPU is executing some unknown number of loop iterations per pixel (although you can have an upper bound like maxIterations). How does having a variable-length loop affect shader performance? Imagine the simple ray-marching psuedocode: t = 0.f; while(t < maxDist) { p = rayStart + rayDir * t; d = DistanceFunc(p); t += d; if(d < epsilon) { ... emit p return; } } How are the various mainstream GPU families (Nvidia, ATI, PowerVR, Mali, Intel, etc) affected? Vertex shaders, but particularly fragment shaders? How can it be optimised?

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• ReSharper 5.0s LINQ Refactoring Continues to be Amazing!

    In this post, well take a straight forward procedure based set of code and convert it to LINQ using a ReSharper from JetBrains suggestion.   The initial code is as follows: int... This site is a resource for asp.net web programming. It has examples by Peter Kellner of techniques for high performance programming...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• circle - rectangle collision in 2D, most efficient way

  - by john smith

  Suppose I have a circle intersecting a rectangle, what is ideally the least cpu intensive way between the two? method A calculate rectangle boundaries loop through all points of the circle and, for each of those, check if inside the rect. method B calculate rectangle boundaries check where the center of the circle is, compared to the rectangle make 9 switch/case statements for the following positions: top, bottom, left, right top left, top right, bottom left, bottom right inside rectangle check only one distance using the circle's radius depending on where the circle happens t be. I know there are other ways that are definitely better than these two, and if could point me a link to them, would be great but, exactly between those two, which one would you consider to be better, regarding both performance and quality/precision? Thanks in advance.

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• How can I ensure our project gets developed successfully, without having any project management experience? [migrated]

  - by Raven13

  I'm a web developer who is part of a three-man team that has been tasked with a rather large and complex development project. Other than some direction and impetus from management, we're pretty much on our own to develop the new website. None of us have any project management experience nor do my two coworkers seem like they would be interested in taking on that role, so I feel like it's up to me to implement some kind of structure to the development process in order to avoid issues down the road. What can I do as a developer without project management experience to ensure that our project gets developed successfully and avoid the pitfalls of developing a project without a plan?

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• Erlang web frameworks survey

  - by Zachary K

  (Inspired by similar question on Haskel) There are several web frameworks for Erlang like Nitrogen, Chicago Boss, and Zotonic, and a few more. In what aspects do they differ from each other? For example: features (e.g. server only, or also client scripting, easy support for different kinds of database) maturity (e.g. stability, documentation quality) scalability (e.g. performance, handy abstraction) main targets Also, what are examples of real-world sites / web apps using these frameworks? EDIT: Starting a bounty in hopes that it will get some conversation going

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• What are the downsides of leaving automation tags in production code?

  - by joshin4colours

  I've been setting up debug tags for automated testing of a GWT-based web application. This involves turning on custom debug id tags/attributes for elements in the source of the app. It's a non-trivial task, particularly for larger, more complex web applications. Recently there's been some discussion of whether enabling such debug ids is a good idea to do across the board. Currently the debug ids are only turned on in development and testing servers, not in production. There have been points raised that enabling debug ids does cause performance to take a hit, and that debug ids in production may lead to security issues. What are benefits of doing this? Are there any significant risks for turning on debug tags in production code?

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• Printing takes forever and gives pixelated prints

  - by kelvinsong

  I have a Brother HL-3070CW printer, which has some serious issues. Printing takes an abnormally long time, and if the file has anything more than text in it, it becomes horribly aliased and pixelated. The printer also sometimes complains about running out of memory. This problem has appeared on and off throughout various Ubuntu releases, and can sometimes be worked around by saving a file in Postscript through Evince, and printing the PS file in Evince. I tried to install drivers from the Brother website, but it gives an error "dependency not satisfiable: hl3070cwlpr" Help, I'm wasting a huge amount of paper and ink(not to mention time) reprinting pages over and over again in trial and error.

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• NEON Intrinsic Support in CE7

  - by Kate Moss' Open Space

  Just a side note for people who may be interested in creating high performance code to take advantage on NEON instruction set but wish to use NEON intrinsic instaed of coding assembly. Compiler won't generate NEON opcode unless application use the NEON intrinsic explicitly. Basically, you need ARMv7 build enviroment, so compiler can emit NEON opcode. Intrinsic prototype can be found in public\COMMON\sdk\inc\arm_neon.h and that is all you got. If you ever find an NEON opcode does not have corresponding intrinsic, you still need to use the old trick - write that part of code in assembly.

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• Winforms Release History : Q2 2010 Beta (version 2010.1.0610)

  Q2 2010 Beta New Controls: RadListControl and RadDropDownList Added brand new RadListControl and RadDropDownList controls. Their purpose is to replace the existing RadListBox and RadComboBox controls entirely in the long term. The old controls will still be supported but users are encouraged to use the new ones since they address the fundamental shortcomings of the old controls, namely the slow performance when working with large data sets, lack of a flexible extensibility API and other minor...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• Slashdotted web site seeks new home

  - by Arthur Edelstein

  I am maintaining a website that contains mostly simple html (just a little php). Normally the site receives only 4000 hits per month, but it was recently slashdotted by the New York Times (30,000 visitors and 30 GB in a day) and the web host provider (bluehost) throttled the CPU in response. This slowed down the website considerably. What web host providers would offer a more scalable solution? Ideally I would like a high-quality host that charges by the GB and can handle bandwidth to expand during sudden slashdotting episodes without a reduction in performance.

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• Touchpad in Sony Vaio E14 - cannot click with a finger and drag with another - Ubuntu 12.04

  - by Nabeel

  I had the following issues with my Sony Vaio E14115's touchpad on Ubuntu 12.04: Right click not working Vertical scrolling not working Then I followed these steps to fix it: Downloaded a patch for Psmouse sudo apt-get install dkms build-essential cd ~/Desktop tar jxvf psmouse-3.2.0-24-generic-pae.tar.bz2 sudo mv psmouse-3.2.0-24-generic-pae /usr/src cd /usr/src sudo chmod -R a+rx psmouse-3.2.0-24-generic-pae sudo dkms add -m psmouse -v 3.2.0-24-generic-pae sudo dkms build -m psmouse -v 3.2.0-24-generic-pae sudo dkms install -m psmouse -v 3.2.0-24-generic-pae sudo modprobe -r psmouse sudo modprobe psmouse This fixed me the problems of Rightclick and vertical scrolling. But I still have an issue of not able to click and drag ie Clicking the leftmouse button and dragging with another finger. It doesn't move! Maybe it doesn't detect the 2nd finger. When I check the capabilities of my Synaptics touchpad by using xinput list-props "SynPS/2 Synaptics TouchPad"|grep Capabilities I get the following output: Synaptics Capabilities (304): 1, 1, 1, 1, 1, 1, 1 Please help me out.

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• When should one use the Abstract, Implements, or extends keywords?

  - by kdavis8

  I'm just now moving from a beginner to intermediate level android programmer in the java language. i can successfully write a game framework of classes that work together to accomplish a task beyond basic things, like hello world. but i'm having issues with some pretty basic OOP concepts; When should i derive from an abstract class? When is it more efficient to use an Interface instead of simply sub classing a parent? Basically, between extends, implements, and the abstract keywords, which keywords should be used instead of the others? i'm not looking for a basic definition, as i know them. i need to no when and why i should apply them to my code? what advantages does one have over the other? which is best for game development?

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• Oracle Solaris 11 Developer Webinar Series

  - by nospam(at)example.com (Joerg Moellenkamp)

  Starting March 27th a number of events called "Oracle Solaris 11 Developer Webinar Series" (that said, i think they are not only interesting for developers, but for admins as well that support admins in their job) will take place by WebEx/Phone: March 27th: Modern Software Packaging for Enterprise Developers April 10th: Simplify Your Development Environment with Zones, ZFS & More April 24th: Managing Application Services ? Using SMF Manifests in Solaris 11 May 8th: Optimize Your Applications on Oracle Solaris 11: The DTrace Advantage May 22nd: Maximize Application Performance and Reliability on Oracle Solaris 11 June 5th: Writing Oracle Solaris 11 Device Drivers All events start at 9am Pacific Daylight Time (Should be 18:00 in Germany, 17:00 in UK, 01:00 in Tokyo). Of course the events are for free (before someone asks) and available for anyone who signs up. The chat is staffed with Solaris 11 Engineering Experts sitting in to answer questions. And most important: Mostly technical content and the events will be recorded.

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• toshiba c800 Fn keys not working

  - by Nirjon Nj

  i am a new born baby in Ubuntu family. And i am really loving it. but i am having few issues which are rally annoying.Please help me to remain in this family. my Toshiba C800 laptop(12.04lts desktop) has special Fn keys as followed Fn+ F2-BRIGHTNESS DOWN F3-BRIGHTNESS UP F4-DISPLAY SELECT F5-TOUCH PAD on/off F6-PREVIOUS F7-PLAY/PAUSE F8-NEXT F9-VOLUME DOWN F10-VOLUME F11-MUTE F12-WiFi on/off now the problem is keys are working fine from F6 to F11(media player keys, i may say) but the keys from F2 to F5 and F12(setting change keys) are not working. please help me. i really liked ubuntu!!

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• Designing an API on top with Java RMI and Rest APIs

  - by user1303881

  I'm working on the backend of a java web application. We have a document repository (Fedora Commons specifically) where we house xml files. I want to abstract the API of the repository internally so that we aren't tightly coupled to one product. I'd also like to give the flexibility of connecting to to a repository via Java RMI or REST APIs. I was hoping to get advice or resources on how to implement something like this. My thought it that I'd have some abstract repository class that had methods like getRecord, updateRecord, and deleteRecord. In the constructor I would pass the URI for the repository and the API method and port. This would allow some flexibility in the future so that if the REST api became more practical, but allow the flexibility or using RMI which could (should?) have better performance. Am I over thinking this or am I on the right path?

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• I can't get suspend, hibernate and shutdown to work in Ubuntu 12.04

  - by Fostext

  I recently built a computer with these specs: Asus Motherboard, Intel i3 3.3 GHz dual processor, 8 GB of RAM. I installed 12.04 on a brand new hard drive. I partitioned the hard drive between root, home and swap like I have often read how to do. I cannot get this machine to properly shutdown. I have to hold the power button down now. Although, for the first few days it properly shutdown. I also cannot get the system to hibernate or suspend properly. I have read tons on this and watched many YouTube tutorials on how to fix both, but the computer never wakes up after suspend or hibernate. It just stays on a black screen. Can anyone help? I love 12.04 so far, but these setbacks are making me worried about stability and power management issues. Also, I wonder if it's really bad for the hard drive to force the CPU to shutdown.

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• Temporary R+W CIFS share for non-root accounts?

  - by Coder

  I want to set up a cross platform mail client (Thunderbird), and so far I want to use NAS as a profile store. The NAS is CIFS based, and can be mounted on both Windows and Ubuntu. Also the locking works fine for mutex, and setup seems to work as a proof of concept. The problem is the Linux mount. Since I'm using a laptop, I'm not always connected to network, hence, I can't use the /etc/fstab to set up CIFS share with a modified group id. And the share has to be mounted using mount -t cifs ..., which causes it to be owned by root, and owned so badly, that it can't be chowned to the regular user account. This causes read only issues for Thunderbird, which seem to be solved if Thunderbird is launched via sudo. But I would like to avoid that and use a script to mount the share on-demand to a profile location, with profile based privileges and access rights. Is there a way to achieve that?

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• Tips for adapting Date table to Power View forecasting #powerview #powerbi

  - by Marco Russo (SQLBI)

  During the keynote of the PASS Business Analytics Conference, Amir Netz presented the new forecasting capabilities in Power View for Office 365. I immediately tried the new feature (which was immediately available, a welcome surprise in a Microsoft announcement for a new release) and I had several issues trying to use existing data models. The forecasting has a few requirements that are not compatible with the “best practices” commonly used for a calendar table until this announcement. For example, if you have a Year-Month-Day hierarchy and you want to display a line chart aggregating data at the month level, you use a column containing month and year as a string (e.g. May 2014) sorted by a numeric column (such as 201405). Such a column cannot be used in the x-axis of a line chart for forecasting, because you need a date or numeric column. There are also other requirements and I wrote the article Prepare Data for Power View Forecasting in Power BI on SQLBI, describing how to create columns that can be used with the new forecasting capabilities in Power View for Office 365.

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• How to review the current state of open source vs. closed source graphics drivers?

  - by Bucic

  How to know whether it's worth it to replace open source drivers installed by default with proprietary ones. Are there any benchmarks? Major known issues summaries. I don't mean 'at the time of writing this post'. I mean an up-to-date status on how the drivers compare. This page https://help.ubuntu.com/community/BinaryDriverHowto/ certainly doesn't do much on the matter, nor it even mentions Intel. EDIT: I've just learned there is no Intel proprietary driver because they made their drivers open source http://askubuntu.com/a/17395/29347

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• Heading in the Right Direction: Garmin Exadata adoption

  - by Javier Puerta

  A pioneer in global positioning system (GPS) navigation, Garmin International Inc. has been adopting Exadata to support the infrastructure that powered the company’s Oracle Advanced Supply Chain Planning, but also the company’s fitness segment, which provides customers with an online platform to store, retrieve, and interact with data captured using Garmin fitness products. The environment, which is built on an Oracle Database, processes approximately 40 million queries per week. Prior to using Oracle Exadata Database Machine, as the online offering grew in popularity, it began to face reliability issues that had negatively impacted the customer experience. We included the video testimonial in a previous post. Now you can find the a complete set of materials about this customer story Garmin Customer Reference Garmin video testimonial:  Garmin Consolidates on Exadata for 50% Performance Boost Profit Magazine article:  Heading in the Right Direction

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