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  • Can coding style cause or influence memory fragmentation?

    - by Robert Dailey
    As the title states, I'd like to know if coding style can cause or influence memory fragmentation in a native application, specifically one written using C++. If it does, I'd like to know how. An example of what I mean by coding style is using std::string to represent strings (even static strings) and perform operations on them instead of using the C Library (such as strcmp, strlen, and so on) which can work both on dynamic strings and static strings (the latter point is beneficial since it does not require an additional allocation to access string functions, which is not the case with std::string). A "forward-looking" attitude I have with C++ is to not use the CRT, since to do so would, in a way, be a step backwards. However, such a style results in more dynamic allocations, and especially for a long living application like a server, this causes some speculation that memory fragmentation might become a problem.

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  • What kind of hosting do I need?

    - by Robert Smith
    I migrated this question from serverfault. Hopefully this is the appropriate place. I have been trying to answer this question but I haven't found an specific answer to my situation. As I want to pay for what I need, I thought I could get a good answer here. I have a custom made forum (rather than a built-in forum like the ones you can find in plugins, e.g. WP-Forum or phpBB type of software) in Django. I don't want to use Apache and modwsgi because it's usually very memory-hungry and I can't afford a big server. I prefer a combination of nginx and gunicorn which I think is very efficient (maybe you can also tell me what you think about that). I'm expecting to receive 10,000 to 20,000 visits each month with 15,000 to 30,000 page impressions. I have reviewed some cloud services like Amazon EC2 or Rackspace and other more traditional services (Linodo). This site won't use videos or big images and I certainly don't need a huge amount of bandwidth (200GB would be definitely too much). I need shell access so shared hosting is out of the question. What do I need to run a website like that without problems? What about RAM? 256MB would be enough (that's the amount of RAM offered by small instances in Amazon and Rackspace)? Do you know of any alternative to those I mentioned? If you need more information to provide a useful answer, please don't hesitate to ask. By the way, I was told that Linodo is not all that different to Amazon EC2 but this website is supposed to work 24/7, so I can't take advantage of Linodo's flexibility regarding creating and deleting instances. Thanks in advance.

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  • What causes the iOS OpenGLES driver to allocate extra memory?

    - by Martin Linklater
    I'm trying to optimize the memory usage of our iOS game and I'm puzzled about when/why the iOS GLES driver allocates extra memory at runtime... When I run our game through Instruments with the OpenGL ES Driver instrument the gartUsedBytes value can fluctuate quite wildly. We preload all our textures and build the buffer objects up front, so it's not the game engine requesting extra memory from GL. Currently we are manually requesting around 50MB of GL memory, yet the gartUsedBytes value sits at around 90MB most of the time, peaking at 125MB from time to time. It seems to be linked to what you are rendering that frame - our PVS only submits VBO's for visible meshes. Can anyone shed some light on what the driver is doing in the background ? Like I said earlier, all our game engine allocations are done on level load, so in theory there shouldn't be any fluctuation on GL memory usage while the level is running. Thanks.

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  • A lot of 408 errors in apache logs - how to prevent them?

    - by Robert Grezan
    I see a lot of 408 errors in my apache2 logs. I increased RequestReadTimeout and KeepAliveTimout but errors are still there. The errors look like this: xx.xx.xx.xx - - [05/Dec/2012:19:33:56 +0100] "-" 408 4561 "-" "-" xx.xx.xx.xx - - [05/Dec/2012:19:33:56 +0100] "-" 408 4561 "-" "-" I heard that these errors are related to Chrome optimization and some users did reported our site returning 408 internal error. It is interesting that we get two 408 error from same IP in sequence then it that IP start working.

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  • Why did the web win the space of remote applications and X not?

    - by Martin Josefsson
    The X Window System is 25 years old, it had it's birthday yesterday (on the 15'th). As you probably are aware of, one of it's most important features is the separation of the server side and the client side in a way that neither Microsoft's, Apples or Wayland's windowing systems have. Back in the days (sorry for the ambiguous phrasing) many believed X would dominate over other ways to make windows because of this separation of server and client, allowing the application to be ran on a server somewhere else while the user clicks and types on her own computer at home. This use obviously still exists, but is marginalized at best. When we write and use programs that run on a server we almost always use the web with it's html/css/js. Why did the web win, and X not? The technologies used for the web (said html/css/js) are a mess. Combined with all the back-end-frameworks (Rails, Django and all) it really is a jungle to navigate thru. Still the web thrives with creativity and progress, while remote X apps do not.

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  • Grails project structure

    - by Martin Janicek
    Good news everyone! I've changed the structure of the Grails project as requested in the issue 160028 and it should be much more user friendly than before. There are actually two things I've fixed/implemented. First of all the source folders are finally represented in the same way as for the Java projects (which means instead of the folder based structure it uses package based structure). The difference can be seen on pictures bellow:    Folder based structure:                                                 Package based structure: Second, minor and quite related change could be seen on those pictures too. There are different icons for different structures. For example Views and Layouts items are folder based, Domain Classes are package based and so on.

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  • We have a 200% increase of "organic" search traffic - how to figure out which keyword is causing this?

    - by Robert Grezan
    So our Google Analytics are showing us that 200% increase of "organic" search traffic. Analytics are saying that search keyword is "(not provided)". We are wondering how to find out which keyword is causing this? We are monitoring all important keywords for our website. None of keyword is in first 5, so our "organic" serach traffic is modest. However, today we received 200% increase of "organic" search traffic but none of keywords we can think of moved a bit. We also did not change anything related to SEO. And what is interesting Google Webmaster shows no changes - ~2500 impressions and ~200 clicks. How to find out which "keyword" might be causing this spike?

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  • Is there a way to change the root password while still logged in? I did something bad by accdient -_-

    - by Robert
    So I was trying to add my printer, and I wasn't able to make any changes due to the fact that cups was not accepting my root password. I was Googling some changes and trying to fix the problem when one of the commands CHANGED MY SUDO PASSWORD! Can someone please tell me which one of these is the culprit? I was trying to these commands: cat /etc/group | grep root cat /etc/group | grep myUserName usermod -a -G lpadmin myUserName sudo usermod -a -G lpadmin myUserName sudo gedit /etc/cups/cupsd.conf lppasswd -a myUserName lppasswd -a root sudo lppasswd -a myUserName I think it was this one, but I know which passwords I put in! There was nothing which I typed in besides my strong password or my easy temporary password. Unless I made a typo... please no. restart cups sudo password root This is so not cool, I was just trying to add a printer :'( Please help my stupidity!

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  • Toshiba Satellite a300 with Maverick keeps crashing.

    - by Martin
    I just installed 10.10 on my girlfriends Toshiba Satellite a300 and for about two days it has been working just fine for two days but today it started acting pretty wonky. Several times over the machine just dies as if it didn't have a battery and someone yanked out the power supply. After such a crash I'll have to wait a while before powering it up again or it will die before it even reaches the startup screen. It sort of seems like it's reacting to something I do. I kept it on for several hours while we were out of the house and it was still fine when I came back. I haven't been doing anything I can imagine is especially CPU-intensive when the crashes occur, but I have been trying to set up her iPod with Rythmbox and / or Banshee. If anyone can point me in the right direction I'd be very grateful.

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  • My home folder disappeared after using Chroot/debootstrap. Can it be recovered?

    - by Martin
    I was following the instructions from http://wiki.winehq.org/WineOn64bit but stopped after cloning wine. Afterwards I closed the terminal and terminated the process when asked. Ubuntu threw up an error report and when I tried to cd to ~/Downloads it was gone, along with all the other directories. So I tried restarting Ubuntu, whereupon I was greeted with the default desktop and home directory. Can I recover my home folder or has it been deleted?

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  • Oracle Exalogic Elastic Cloud Software 2.0

    - by Robert Baumgartner
    Am Mittwoch den 25. Juli 2012 um 19:00 wird die neu Version der Oracle Exalogic Cloud Software 2.0, dem Engenieered System für den Oracle WebLogic Server, vorgestellt. Learn how Oracle Exalogic Elastic Cloud Software 2.0 can help your company: Close business up to 10x faster Protect sensitive data with complete application isolation Rapidly respond to market needs by provisioning applications 6x faster Maximize availability and productivity with 2x faster Näheres siehe Register now

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  • How to collaborate on features using github

    - by Robert Dailey
    github encourages 1 fork per user, so that that user can work independently on a feature and then request that feature to be accepted into the main repository via pull request. However, what if 2 developers need to collaborate on that feature? What is the ideal workflow for this? I could see a number of options: Both developers fork the original repository. Each developer pulls/pushes changes between each other's repository. This seems like a lot of work (tiny micro operations) and also creates a delay between changes, so increases the window for conflicts. Developer 1 forks from the main repository, developer 2 forks from developer 1. Same as #1 mainly but hopefully simplifies Developer 2's life a little? Developer 1 gives Developer 2 permissions to his own fork, so they both work out of the same central repository. Not sure if this is ideal. I'm also curious where branches come into this. Obviously there would be a branch for the feature itself but that branch can't exist in a single place, it would have to exist on multiple forks and be synchronized. Basically just really confused about this workflow, would like an approach for how this can be best accomplished.

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  • What subject do you discuss with your manager during a one-on-one?

    - by Martin
    Every week, I have a 30 minutes meeting scheduled with my manager to talk about pretty much anything. So far, I haven't taken those one-on-one very seriously. As a new year resolution, I would like to take more seriously my one-on-ones with my manager. One way I though I could do that is to plan in advance (come up with a list of questions and/or agenda) my one-on-one. With the exception of the status report, what subject do you discuss with your manager during a one-on-one? Have you ever seen an agenda for one-on-one?

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  • How can a programmer refine their skills in non-visual ways?

    - by Martin Josefsson
    I feel like when I am not writing, I am reading. When I come home from my programming job I write and read software and about software. The problem is though, both reading and writing requires my eyes to be focused. That doesn't work when I'm biking, cooking shopping for groceries. Sometime I use text-to-speech programs to listen to blogs, but I feel like there could be more. What ways can a software developer learn more without requiring eye focus? How to blind coders learn the craft?

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  • Hotel Reservation Request Booking Paypal PHP

    - by Robert
    I'm making a website for a small hotel in php. The hotel owners want a reservation system that uses paypal. They want people to see a calendar and choose a date to make a reservation. If the day has vacancy, they want the user to request booking a room. This would then require the hotel owner to accept the purchase. I have not worked on a project that has this "request to purchase" method of buying with paypal. Is this possible? Does anyone know of an open php system that handles this? THANKS :)

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  • Remote Desktop Connection Manager

    - by Robert May
    For years, I’ve been using the “Remote Desktops” mmc plugin to manage servers in our infrastructure.  I’ve upgraded to Windows 8 and Remote Desktops is nowhere to be found!  I search and searched and came across a forum listing saying “Why don’t you just use Remove Desktop Connection Manager?” I downloaded it and started using it and its WAY better than Remote Desktops!  I’m glad they took it out and I discovered this tool.  I wish I had discovered this two years ago! Technorati Tags: System Administration

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  • NEU: Oracle ADF Mobile - Anwendung für iOS und Android entwickeln

    - by Robert Baumgartner
    Oracle ADF Mobile steht ab sofort zur Verfügung. Es ist ein HTML5 und Java Mobile Development Framworw, dass es ermöglicht Enterprise Applications für iOS und Android Geräte (Handy und Tablet) mit einem Code zu entwickeln. Basieren auf einer hybriden Mobile Architektur werden auch gerätesprezifische Funktionen, wie z.B. die Kamera, unterstützt. Details zu Oracle ADF Mobile finden Sie unter Oracle ADF Mobile FAQs Demo ADF Mobile BLOG

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  • How should I set up UDK with Git and CruiseControl?

    - by Martin Sojka
    For a new project in UDK, I'd like to set up a Git repository for version control and a CruiseControl.NET-based continuous integration solution. The good news is that he first part seems easy enough and CruiseControl.NET can work off Git repositories. The bad news is that according to my searches, nobody has ever tried to do this. Ideally, I'm looking for a step-by-step guide on how to set up such a development environment assuming more than one development computer, one central repository for the "master" branch, and one machine for building and packaging the binaries via CruiseControl.NET. Related: Version control system for game development with UDK? Options for UDK and version control repositories? CruiseControl.NET and Git

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  • unable to boot and boot-loop on splash screen

    - by Joel St Martin
    hey i have tried to install ubuntu many times, but once it installs it boot-loops at the splash screen. it just loops through the boot sound and the screen not sure why. nothing has seemed to work. also its only alowing me to boot windows all other oporating systems crash and loop just like ubuntu (android x86, linux mint, red hat, ubuntustudio). compac amd 64 3400+ 1gig ram 2 hhd (200 gig/120 gig) 1 ssd (500gig) win7 x86 a video showing what happens

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  • How to optimize calls to multiple APIs at once and return as one set?

    - by Martin
    I have a web app that searches across 2 APIs right now. I have my own Restful web service that I call, and it does all the work on the backend to asynchronously call the 2 APIs and concatenate them into one result set for my web app to use. I want to scale this out and add as many other APIs as I can (currently looking at about 10 more). But as I add APIs, the call to my service gets (potentially) slower and more complex. How do I handle one API not responding ... and other issues that arise? What would be the best way to approach this? Should I create a service call for each API, that way each one is independent and not coupled to all the other calls? Is there a way on the backend to handle the multiple API calls without all the extra complexity it adds? If I go the route of a service call per API, now my client code gets more complex (and I have a lot of clients)? And it's more work for the client, and since I have mobile apps, it will cost the client more data usage. If I go one service call, is there a way to set up some sort of connection so I can return data as I get it, in case one service call hangs?

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  • ubuntu-support-status error

    - by Robert Vila
    Running Natty, I read: "The ubuntu-support-status command will print the exact status of your system." I typed: $ ubuntu-support-status Traceback (most recent call last): File "/usr/bin/ubuntu-support-status", line 105, in <module> (still_supported, support_str) = get_maintenance_status(cache, pkg.name, support_tag) File "/usr/bin/ubuntu-support-status", line 37, in get_maintenance_status raise Exception("No date tag found") Exception: No date tag found Does someone know why can this happen. Could it be because is it running on a Mac. How can this be fixed?

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  • What is the program "Additional Drivers" (jockey-gtk) talking me about?

    - by Robert Vila
    The program says: "No proprietary drivers are in use on this system" But it doesn't say if it is talking about graphical drivers only or what. Then, it lists two drivers: NVIDIA accelerated graphics driver (version 173). NVIDIA accelerated graphics driver (version current) [recomended] Both have exactly the same description. What is the difference then? When I select the 1st one, it says: "This river is not activated",and there's a button to "activate" it. When I select the 2nd one, it says: "This river is activated but it is not currently in use", and the button is to "remove". So which one is in use? Why or what for should I have activated (enabled) and not in use? If it is in use it is activated? What is the difference between activate and remove? and what is the relationship between installed, activated, in use, enabled and removed, disabled, inactive and not-installed? Why can I activate the inactivated and remove (but not deactivate) the activated that is not in use? All this is very puzzling... What other drivers can I use for an Apple MacBook pro 3,1 and how? I see that there's a nouveau and I heard that there was going to be a new open source even better. > -display > description: VGA compatible controller > product: G84 [GeForce 8600M GT] > vendor: nVidia Corporation

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  • Git repo: Unravelling my mess into tidy branches

    - by Martin
    I wanted to play with a project, so git cloned it and, following its instructions, created a local branch for my configuration (I guess so that users can merge updates back). At first I was just tweaking to suit my preferences, so I didn't bother with any further branching, but now I have some code that might be useful to someone else, but with my passwords, etc in the same branch. Effectively, I have one big branch from which I'd like to have: Postgres backend (default) but with some new code I've added MySQL backend (the biggest change I've made) with that same new code My settings: I can't git ignore the settings file because I occasionally have to add sections for new functionality, but I need to keep my personal settings out of the public branches! I guess this would work best as a local-only branch. Dev branches, which I would branch from the MySQL. Starting from scratch, I think I could figure out how to branch/merge the various updates, but is there an easy way to walk through the existing repo and choose which commits to apply to which branch? Or possibly create a branch from a point upstream then merge back, excluding certain commits?

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  • Are code screening services worthwhile?

    - by Robert Klubenspies
    I've seen websites that screen programmers by their ability to write code. It's a service that you enter a programming question into and then send out a link. Job candidates program their solution to the question as they are timed and recorded. The person who posted the question can then playback a video of their candidate programming the script. This video allows them to see how quickly and neatly their job candidate can code. Are these types of services worth it? What caveats and hangups are there to using such things to screen potential hires?

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  • Hospital fined $1m for Patient Data Breach

    - by martin.abrahams
    As an illustration of the potential cost of accidental breaches, the US Dept of Health and Human Services recently fined a hospital $1m for losing documents relating to some of its patients. Allegedly, the documents were left on the subway by a hospital employee. For incidents in the UK, several local government bodies have been fined between £60k and £100k. Evidently, the watchdogs are taking an increasingly firm position.

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