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• The November 12 Edition is Here - Oracle Virtualization Newsletter

  - by Chris Kawalek

  We are pleased to announce the November 2012 edition of the Oracle Virtualization newsletter is now ready for you to read! It has a shiny new look and lots of great content, including: Oracle OpenWorld 2012 highlights and videos Advanced I/O Virtualization Architecture for Consolidating High-Performance Workloads video What's New in Oracle Secure Global Desktop 4.7 video  Self-paced Oracle VM hands on labs news Information on the Oracle VM Storage Connect Plug-in For NetApp Storage Webcasts, white papers, events, and more...   Read the November edition here. Subscribe now. 

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• Use of Service Bus in a Pub-Sub Engine

  - by JoseK

  In one of our projects, we've built a Publisher - Subscriber Engine on Oracle Service Bus. The functionality being a series of events are published and subscribers (JMS queues) receive these whenever a new event is published. We are facing some technical issues now, performance-wise and hence an architectural review is underway. Now for my questions: Architecturally the ESB has to publish events into a DB and read from the DB which users wish to be notified, then push the event onto their respective queues. There is a high amount of DB interaction and the question is whether ESB should be having such high amount of interaction with the DB in the first place? Or should there have been some alternate component responsible for doing this. Alternately is there any non-DB approach in which we can store the events and subscribers? Where else can this application data be held within the ESB context?

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• Using usbdrive as ram in ubuntu

  - by tachyons

  In windows it is possible to use usb flash drive as a virtual ram. I wonder if it is possible to do so in ubuntu? If it is, how could one do it? [Edit]: I mean Ready boost equivallent for ubuntu. I know that it is not a perfect replacement for ram and it is not advisable for longterm use. Is creating swap file in a usb flash drive similar to it? Will it demonstrate performance gains over a swap file in a Hard Disk Drive?

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• 3D/perspective Top down shooter bullet issues

  - by Tseng

  I'm developing a top-down shooter with multiple levels (ground for ground units, middle level for buildings, top level for air unity). The problem is the collision. Though I can make the collider box of a bullet be long enough to reach the ground (and collide with it), the real issue is optical. When the bullet is fired from a aircraft and collides with some object on the ground (building, ground unit) it will be optically offset due to the perspective camera, because it looks like the shot "by-passed" the target as seen below Is there any way to make the bullets collide perspectively correct? I'm using Unity3d Engine and it offers only simple colliders (box, sphere, cylinder, mesh and wheel), though I don't think a cone-formed collider would solve this issue. I'd need a (cheap) way to check if it's overlapping a destructible object? I thought of casting a ray from the camera through the bullet and if it hits something destructible, trigger an action, but that's quite punctual and maybe to performance heavy on certain number of bullets

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• Visit the Museum of Endangered Sounds for a Bit of Nostalgic Sound-Based Fun

  - by Asian Angel

  Are you ready for a trip down memory lane? Then you will definitely want to visit the Museum of Endangered Sounds where you can have fun listening to the classic sounds of yesteryear! Enjoy listening to the sound of dial-up, the login sound of Windows 95, that classic Nokia ringtone, and more at the Museum. Click on a picture to play the sound, then click on the picture again to stop it. The sounds will continue to play until you click on the chosen picture… Museum of Endangered Sounds [via Neatorama] Browse on over to another of our ETC posts for more nostalgic sound fun: Hack Your Kindle for Easy Font Customization HTG Explains: What Is RSS and How Can I Benefit From Using It? HTG Explains: Why You Only Have to Wipe a Disk Once to Erase It

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• Desktop Fun: Sunsets Wallpaper Collection Series 1

  - by Asian Angel

  Sunsets can turn the sky into a work of art as day slowly fades into night and taking a moment to enjoy the beauty can be the perfect way to end the day. Bring this peaceful time of day to your desktop with the first in our series of Sunsets Wallpaper collections. SPECIAL NOTE: Due to the unexpected problem with Paper Wall’s server we are providing a download link for the entire wallpaper set in a zip file (~12 MB) HERE. HTG Explains: What Is RSS and How Can I Benefit From Using It? HTG Explains: Why You Only Have to Wipe a Disk Once to Erase It HTG Explains: Learn How Websites Are Tracking You Online

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• Flaws in my PHP development setup - sharing sources causing lags

  - by Wiktor

  I have following development setup for my PHP projects: Working station running on Windows 7 with PhpStorm IDE. GIT for version controlling. CentOS on virtual machine (VirtualBox) with Apache and MySQL (copy of production server). So far, I've been sharing project's source folders between host and guest systems and it was working quite well only really slow. The reason behind this is that Apache was reading files from remote folder (mounted locally). After doing some research, I found out that this set up can be improved by using disk mapping (Samba) instead of folder sharing. So I did that change. I configured my PhpStorm to automatically deploy files to mapped drive. Everything works like a charm now, except for one problem - when I change branches I need to synchronize project's local folder with the one on mapped drive and that takes time, a lot of time (like branching in SVN). Is there another way to handle this than just working on files directly on mapped drive?

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• 64 bit Ubuntu sees half my RAM

  - by koehn

  This is on my AMD FX(tm)-4100 Quad-Core Processor (according to /proc/cpuinfo) on a machine with two 4GB RAM DIMMs. BIOS shows 8GB RAM installed. Any help would be appreciated. RAM: Extreme Performance Sector 5 G Series 8GB DDR3-1333 (PC3-1066) Enhanced Latency Dual Channel Desktop Memory Kit (Two 4GB Memory Modules) MB: GA-78LMT-S2P Socket AM3+ 760G mATX AMD Motherboard CPU: FX 4100 Black Edition 3.6GHz Quad-Core Socket AM3+ Boxed Processor Here's what the software says: $ free total used free shared buffers cached Mem: 3515100 3293656 221444 0 19260 2670352 -/+ buffers/cache: 604044 2911056 Swap: 3650556 90916 3559640 $ uname -a Linux mythbuntu 3.2.0-30-generic #48-Ubuntu SMP Fri Aug 24 16:52:48 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux From lshw: *-memory description: System Memory physical id: 20 slot: System board or motherboard size: 4GiB *-bank:0 description: DIMM 1066 MHz (0.9 ns) product: None vendor: None physical id: 0 serial: None slot: A0 size: 2GiB width: 64 bits clock: 1066MHz (0.9ns) *-bank:1 description: DIMM 1066 MHz (0.9 ns) product: None vendor: None physical id: 1 serial: None slot: A1 size: 2GiB width: 64 bits clock: 1066MHz (0.9ns)

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• How to fix hibernate / suspend with proprietary nVidia driver?

  - by Chris

  Hi, I've just got an Dell Precision M6500 that comes with an nVidia card. Together with Kubunutu 10.10 and the proprietary nvidia driver suspend to disk or RAM does not work. It's allways ending with a running system and a locked screen (i.e. I can just enter my password and everything is as before - it's never sleeping) Can someone please help me to debug this issue? Where should I look for information? None of the log files seem to show an obvious error... Thanks, Chris

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• List of eCommerce sites that use end-to-end SSL?

  - by Jon Schneider

  My development team is considering implementing an eCommerce site using end-to-end SSL -- that is, every page on the site is accessed via an https:// URL -- rather than the more traditional "mixed mode" where most pages are accessed via http:// and only "secure" pages such as login and credit card entry are redirected to https://. Pros of doing such a "pure SSL" approach include avoidance of some session-hijacking attacks such as Firesheep; cons include performance considerations. My question is: Is anyone aware of a list of eCommerce websites (especially USA-based sites), or even specific websites, that use this end-to-end SSL approach? I'm especially interested in "regular" eCommerce sites rather than banks or other "financial" sites.

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• Cloud hosting vs self hosting price

  - by yes123

  I was looking at some cloud hosting price. Consider an entry level self hosted server: PRICE: 40€ ---------- CPU: i5 (4x 2.66 GHz) RAM: 16GB hard disk: 2TB Bandwidth: 10TB/month with 100Mbps Now consider an equivalent on a cloud structure... (for example phpfog) PRICE: 29$ -------------- RAM: 613MB (LOL WUT?) CPU: 2 Burst ECUs Storage: 10GB (WUT?) Basically with cloud, to have the same hardware of your entry level dedicated server you have to pay 300-400€... Is it normal? I am missing something?

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• The Most Useful Bookmarklets to Enhance Your Browsing Experience

  - by Lori Kaufman

  Bookmarklets are JavaScript links you can place on your browser’s toolbar that add one-click functionality to the browser or webpage. They are free and help make repetitive tasks in your browser quicker and easier to perform. Use bookmarklets to add functionality to your browser, such as modifying the appearance of a webpage, extracting data from a webpage, and search for highlighted text in a search engine or online encyclopedia. We’ve collected some links to useful bookmarklets here to enhance your browsing experience. 7 Ways To Free Up Hard Disk Space On Windows HTG Explains: How System Restore Works in Windows HTG Explains: How Antivirus Software Works

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• Ubuntu Server 12 HD full

  - by julio

  I have a server with Ubuntu Server 12, today it stops some services and I found some comments about full disk, so I made a df -h S.files Size Used Disp Use% /dev/mapper/ubuntu-root 455G 434G 0 100% / udev 1,7G 4,0K 1,7G 1% /dev tmpfs 689M 4,2M 685M 1% /run none 5,0M 0 5,0M 0% /run/lock none 1,7G 0 1,7G 0% /run/shm /dev/sda1 228M 51M 166M 24% /boot overflow 1,0M 0 1,0M 0% /tmp Then I tried to delete some files but I made it from a windows remote computer just right clic and "delete" option on files, but HD still full. Is in Ubuntu Server any Trash file or what could be happeing?

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• Pro Google App Engine developer interview questions (with answers)

  - by WooYek

  What are good questions to determine if applicant is pro Google App Engine developer? Questions that can distinguish that someone is not an ad-hoc GAE programmer, but is really doing professional GAE development, with all areas concerned (eg. performance, transactions, async/batch data processing). Please provide answers, so an intermediate developer (such as myself :) can interview someone more experienced. Please avoid open questions. If possible please provide a link to a documentation part that's covering a topic in question. Please keep one interview question/answer per response for better reading experience and easier interview preparation.

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• Where do I add boot parameters to use ks.cfg

  - by user10822

  Hi, I created a kickstart file ks.cfg and then I have put that in the bootable disk*(Ubuntu 10.04)* and then added the following line to the isolinux.cfg linux ks=ks.cfg and have not removed any other lines from the isoconfig.cfg file and then while installing the installation is not automated, again it is asking for language and all. If i removed include menu.cfg or any other line from isolinux.cfg i am getting a boot error. What should i do now to automate the installation.Where should i add the boot parameters so that installation will start from the ks.cfg . Thanks and Regards Ravi Kumar

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• Two new features in November 2009 CTP

  - by kaleidoscope

  Windows Azure Diagnostics Managed Library: The new Diagnostics API enables logging using standard .NET APIs. The Diagnostics API provides built-in support for collecting standard logs and diagnostic information, including the Windows Azure logs, IIS 7.0 logs, Failed Request logs, crash dumps, Windows Event logs, performance counters, and custom logs. Variable-size Virtual Machines (VMs): Developers may now specify the size of the virtual machine to which they wish to deploy a role instance, based on the role's resource requirements. The size of the VM determines the number of CPU cores, the memory capacity, and the local file system size allocated to a running instance. e.g.: <WebRole name=”WebRole1” vmsize=”ExtraLarge”> Supported values for the ‘vmsize’ are: 1. Small 2. Medium 3. Large 4.       ExtraLarge More information for Diagnostics Managed Library can be found at: http://msdn.microsoft.com/en-us/library/ee758705.aspx   Girish, A

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• OData Query Option top Forces Data To Be Sorted By Primary Key

  This post show a simple WCF Data Service (Formerly known as ADO.NET Data Services) project that retrieves data using the Reflection Provider for accessing data. It goes on to show that using $top... 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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• How to Use a 64-bit Web Browser on Windows

  - by Chris Hoffman

  64-bit version of Windows don’t use 64-bit browsers by default – they’re still in their infancy, although even Adobe Flash now supports 64-bit browsers. Using a 64-bit browser can offer significant performance benefits, according to some benchmarks. This article is for Windows users – 64-bit Linux distributions include 64-bit browsers, so you don’t have to do anything special on Linux. How to Own Your Own Website (Even If You Can’t Build One) Pt 1 What’s the Difference Between Sleep and Hibernate in Windows? Screenshot Tour: XBMC 11 Eden Rocks Improved iOS Support, AirPlay, and Even a Custom XBMC OS

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• Cheerp -- C++ for web: advance or regression?

  - by Henrique Barcelos

  Recently I've run into Cheerp, a C++ to Javascript compiler, which uses a modified version of clang to generate Javascript code from C++ sources. That makes me wonder: why in the seven kingdoms would someone do this in their right mind? I mean: why would you take a language that is not designed for web at all, that is far more convoluted and bureaucratic, write your code and then compile it into Javascript itself? Can anybody see any advantages in doing so? We surely can discard performance as a reason, because in the end it generates pure Javascript code. Is there anyone here that have real experience with this? P.S.: I'm not sure if this is an on topic question, but this is the most general forum about programming that I could find in the StackExchange network. Edit Although this seems like a subjective question, it is not. I am asking for reasons that this tool could be useful. I got interested at first, but started wondering why would someone use it.

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• Disable suspend / hibernate via the policykit

  - by redonath

  I am trying to run Lubuntu 12.04, but if the computer suspends I am unable to bootup again. Instead I see the bios post, the hard disk light flickers once and I have to install again (I have tried to re-install grub2). I am new to Linux and what I found that best answered my question was posted by James Henstridge. The instructions say to create disable-shutdown.pkla in etc/polkit-1/50-local.d/ but this directory does not exist, so do I create a folder titled 50-local.d in poolkit-1 or do I have to place this file elsewhere?

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• Is it any good to use binary arithmetic in a C++ code like "C style"?

  - by user827992

  I like the fact that the C language lets you use binary arithmetic in an explicit way in your code, sometimes the use of the binary arithmetic can also give you a little edge in terms of performance; but since I started studying C++ i can't really tell how much i have seen the explicit use of something like that in a C++ code, something like a pointer to pointer structure or an instruction for jumping to a specific index value through the binary arithmetic. Is the binary arithmetic still important and relevant in the C++ world? How i can optimize my arithmetic and/or an access to a specific index? What about the C++ and the way in which the bits are arranged according to the standard? ... or i have taken a look at the wrong coding conventions ... ?

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• For what types of applications is Python a bad choice?

  - by Casey Patton

  I just started learning Python, and I'd like to get some more context on the language. I realize that Python is a slow language relative to C or C++, etc. Thus, Python is probably not the best choice for applications that need to run quickly. Outside of this, it seems like Python is a great general purpose language that is easy to read and write. The available libraries give it a huge amount of functionality. Outside of performance critical applications, where is it a bad choice to use Python (and why)?

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• Android/Java AI agent framework/middleware

  - by corneliu

  I am looking for an AI agent framework to use as a starting point in an Android game I have to create for a university research project. It has been suggested to me to use JADE, but, as far as I can tell, it's not a suitable framework for games (at least for my game idea) because it runs in a split-execution mode, and it needs an always-active network connection to a main host. What I want is just a little something to give me a headstart. I am willing to adjust the game's features to the framework because it's more of a mockup game, and the purpose is to compare the performance of a couple of agents in the game world. The game will be very simplistic, with a minimal UI that displays various stats about the characters in the game (so no graphics, no pathfinding). Thank you.

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• Topeka Dot Net User Group (DNUG) Meeting &ndash; April 6, 2010

  Topeka DNUG is free for anyone to attend! Mark your calendars now! SPEAKER: Troy Tuttle is a self-described pragmatic agilist, and Kanban practitioner, with more than a decade of experience in delivering software in the finance and health industries and as a consultant. He advocates teams improve their performance through pursuit of better practices like continuous integration and automated testing. Troy is the founder of the Kansas City Limited WIP Society and is a speaker at local area groups...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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• Dual booting Ubuntu 12.04: UEFI and Legacy

  - by cmhughes

  I'm trying to dual boot Ubuntu 12.04 (or 12.10) with Windows 8 on a new Sony Vaio, but have run into some problems :) Specifically, my problems seem to come from choosing UEFI or Legacy as the Bootmode in the BIOS. Here is what I have found so far: Windows 8 needs to boot using UEFI, and doesn't work in Legacy mode Ubuntu (both 12.04 and 12.10) needs to boot using Legacy, and won't boot (at least from the live disk) in UEFI mode I have been able to boot Ubuntu using a live USB disc, provided that I change the Bootmode to Legacy. I haven't committed to installing it yet, because I don't really understand the consequences. My main concerns are that instead of simply selecting Windows or Ubuntu in Grub, I would also have to change my Bootmode every single time, which seems like a lot more trouble than it should be. So, the question: how can I install Ubuntu 12.04 or 12.10 in UEFI boot mode?

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