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  • cloud programming for OpenStack in C / C++

    - by Basile Starynkevitch
    (Sorry for such a fuzzy question, I am very newbie to cloud programming) I am interested in designing (and developing) a (free software) program in C or C++ (probably, most of it being meta-programmed, i.e. part of the C code code being generated). I am still in the thinking / designing phase. And I might perhaps give up. For reference, I am the main architect and implementor of GCC MELT, a domain specific language to extend the GCC compiler (the MELT language is translated to C/C++ and is bootstrapped: the MELT to C/C++ translator being written in MELT). And I am dreaming of extending it with some cloud computing abilities. But I am a newbie in cloud computing. (I am only interested in free-software, GPLv3 friendly, based cloud computing, which probably means openstack). I believe that "compiling on the cloud with some enhanced GCC" could make sense (for super-optimizations or static analysis of e.g. an entire Linux distribution, or at least a massive GCC compiled free software like Qt, GCC itself, or the Linux kernel). I'm dreaming of a MELT specific monitoring program which would store, communicate, and and enhance GCC compilation (extended by MELT). So the picture would be that each GCC process (actually the cc1 or cc1plus started by the gcc driver, suitably extended by some MELT extension) would communicate with some monitor. That "monitoring/persisting" program would run "on the cloud" (and probably manage some information produced by GCC e.g. on NoSQL bases). So, how should some (yet to be written) C program (some Linux daemon) be designed to be cloud-friendly? So far, I understood that it should provide some Web service, probably thru a RESTful service, so should use an HTTP server library like onion. And that OpenStack is able to start (e.g. a dozen of) such services. But I don't have a clear picture of what OpenStack brings. So far, I noticed the ability to manage (and distribute) virtual machines (with some Python API). It is less clear how can it distribute some ELF executable, how can it start it, etc. Do you have any references or examples of C / C++ programming on the cloud? How should a "cloud-friendly" (actually, OpenStack friendly) C/C++ server application be designed?

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  • L'essor du Cloud freiné par l'organisation des entreprises et non par la défiance envers la technologie selon IDC et VMWare

    L'adoption du Cloud serait freinée par l'organisation des entreprises Et non par la défiance vis-à-vis de la technologie selon IDC et VMWare Ce seraient les mentalités au sein des départements informatiques et non le manque de confiance dans la technologie qui freineraient l'adoption du Cloud Computing public, selon le livre blanc publié par IDC et sponsorisé par VMware. L'étude IDC "Accélérer la réussite du cloud hybride et ajuster les mentalités" prévoit que les deux prochaines années marqueront un tournant dans l'adoption du Cloud Computing en Europe. Une entreprise sur trois voit aujourd'hui cette technologie comme une composante essentielle de sa stratégie informati...

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  • Develop an android and iPhone application with shared database

    - by Bongo
    I have a great idea for smartphone application, And I want to develop an application suited for both android and iPhone. In addition I need to use spatial database for geo indexing that will be shared for both applications. I am new to this app world and I have some questions. Is there away to develop for both machines? I know java but not objective c. My guess is that I need to separate the database from the computing to support both applications. What are the best cloud computing providers with spatial database support that can host the server? Do I need 2 hosting servers or there is one server the can support the both of them? which database provider can support geo indexing and support this intergraion, I prefer providers with reasonable free quotas. Thanks.

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  • how to deal with parallel programming

    - by nkint
    Hi. I know that parallel programming is a big resource in computer graphics, with moder machines, and mayebe a computing model that will be grow up in the near future (is this trend true?). I want to know what is the best way to deal with it. there is some practical general purpose usefulness in studying processor n-dimensional mesh, or bitonic sort in p-ram machines or it's only theory for domain specific hardware used in real particular signal elaborations of scientific simulations? Is this the best way to acquire the know how for how to become acquainted with cuda or opencl? (i'm interested in computer graphics applications) and why functional programming is so important to understand parallel computing? ps: as someone has advice me i have forked this discussion from http://stackoverflow.com/questions/4908677/how-to-deal-with-parallel-programming

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  • Chargeback and billing across public and private clouds

    - by llaszews
    Had a great conversation today regarding the need for metering, chargeback, and billing of cloud computing resources. The person I spoken with at a Fortune 1000 company increased the scope and magnitude of the issue of billing for cloud computing resources beyond what I had previously considered. I believed that doing any type of chargeback and billing for one public, private or hybrid installation was difficult. This person pointed out that the problem is even bigger in scope. The reality is many companies are using multiple public cloud vendors and have many different private cloud data centers. A customer may use AWS for some smaller public cloud applications, Salesforce.com (SaaS), Rackspace for IaaS, Savvis for colocation and a variety of Iaas and PaaS implementations for the private cloud. How does a company get a consolidated bill for all these different cloud environments? I am not sure their is an answer right now.

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  • RTS Game Style Application [closed]

    - by Daniel Wynand van Wyk
    My question may seem somewhat odd, but I hope that my specifications will clarify EXACTLY what it is that I am after. I need some help choosing the right tooling for a particular endeavour. My background is in desktop application development and large back-end systems. I have worked primarily on the Microsoft stack using C# and the .Net framework. My goal is to develop a 2D, RTS style, interactive office simulation. The simulation will model various office spaces, office equipment, employees and their interactions with one another. The idea is to abstract the concept of an office completely. Under the hood the application will do many things that are nothing like a game. This includes P2P networking, VPN tunnelling, streaming video, instant messaging, document collaboration, remote screen sharing, file-sharing, virus scanning, VOIP, document scanning, faxing, emailing, distributed computing, content management and much more! A somewhat similar thing has been attempted by IBM, where they created a virtual office in second life. If their attempt was a game, the game-play would be notably horrible, to say the least! The users/players will drive and control my application through the various objects modelled in the simulation. A single application capable of performing all of these various tasks would be a nightmare to navigate for even the most expert user. Using the concept of a game, I can easily separate functionality by assigning them to objects that relate 1-1 with their real world counter-parts. This can greatly simplify computing for novice users, with many added benefits in terms of visibility, transparency of process and centralized configuration. My hope is to make complex computing tasks accessible to all kinds of users and to greatly reduce the cognitive load associated with using the many different utilities and applications inside office settings. The complexity is therefore limited to the complexity of the space in which you find yourself. I want the application to target as many platforms as possible and run on computers that have no accelerated graphics capabilities. The simulation won't contain any of the fancy eye-candy you find in modern games, to the contrary, my "game" will purposefully be clean and simple. The closest thing I could imagine would be an old game like "Theme Hospital" or the first instalment of "The Sims". All the content will be pre-created and not user-generated like Second Life. New functionality will be added via a plugin system. Given my background and nature of my "game", I would like to spend most of my time writing code that does not have to do with the simulated office, as the "game" is really just a glorified application menu. I have done much reading about existing engines, frameworks and tools. I need the help of an experienced game developer who has tried and tested various products over the years who can guide me in the right direction given my very particular needs. I would appreciate any help I can get!

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  • FMW Cloud Forum: Chicago

    - by kellsey.ruppel
      The increasing popularity of cloud computing is changing how enterprise systems are managed and organized--and that change does not stop at the datacenter. Cloud computing is also changing how enterprises develop and build business applications, a shift that will require unprecedented collaboration across the enterprise, from developers to the user community. Are you currently building applications in the Cloud? What concerns or challenges do you forsee in doing so? Oracle experts will be discussing these topics and how with a user experience platform you can leverage new collaborative practices to design and build applications that deliver business value and meet exacting user requirements. Join us in Chicago on June 29th to learn more and hear from Oracle experts. Not located in Chicago? We're coming to a city near you!

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  • Intel N10 graphics

    - by Rapsag1980
    Español: Buen día. Instalé en una notebook ubuntu 12.04 pero me da el problema que solamente me da dos resoluciones de pantallas 800x600 y 1024x768... En la primera se ve muy grotesca la pantalla y en la segunda se ve bien, pero falta un pedazo de pantalla arriba y abajo... He tratado de buscar información sobre el tema pero parece uno de esos "bugs" que no han conseguido ser erradicados... Intenté hacer el Xorg.conf y esas cosas y nomas no se puede... Recurro a su sapiencia y experiencia en este tipo de problemas... La mini es una Lanix Neuron lt, procesador intel atom n450 y la tarjeta Intel corporation N10 family integrated graphics controller.... Inglés: Good day. I installed ubuntu 12.04 on a notebook but I get the problem that only gives me two screen resolutions of 800x600 and 1024x768 ... The first screen looks very grotesque and the second looks good, but missing a piece of screen up and down ... I tried to find information on the subject but it seems one of those "bugs" that have failed to be eradicated ... I tried to do the Xorg.conf nomas and stuff and you can not ... I appeal to your wisdom and experience in this kind of problem ... The mini is a Neuron Lanix lt, Intel Atom N450 processor and the Intel integrated graphics family corporation N10 controller ....

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  • recommendations for a lightweight linux distribution for a test server

    - by Jack
    I'm planning on setting up a test server to experiment with some application servers (tomcat/jboss/...) and with some portals. Now the machine I've set aside for this is lightweight CPU/GPU wise(Atom D510, 4 gigabyte ram, 500 GiB hdd, onboard GPU). But it should suffice for most things, I'm more interested in the stability of JBoss/Tomcat for my purposes than the stability. However I'm having a bit of trouble picking an appropriate distribution size/performance/setup time wise/security wise since it seems I can't sneeze without another distribution popping up. I've been thinking about going for Fedora since I've read that that distribution has been optimized for Atom, but I'm not really familiar with it. My experience with Linux has mostly been limited to Ubuntu and some tinkering with puppylinux. I'm not afraid to get my hands dirty using the command line. I'm not planning on starting a discussion per se, mostly the pros/cons that people have encountered with some distributions

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  • "En 2020, 80% des applications tourneront dans le cloud", déclare Microsoft, en expliquant que les DSI devront s'adapter à ces changements

    "En 2020, 80% des applications tourneront dans le cloud", déclare Microsoft, tout en expliquant que les DSI devront s'adapter à ces changements Au premier jour des TechDays 2011, nous avons pu rencontrer Jérôme Trédan, Directeur produits serveurs et infrastructure de cloud computing chez Microsoft France. Sa mission : encadrer une équipe de chefs de produits sur toute les lignes de produits serveurs, dans 3 grands domaines : les infrastructures (Windows Server, System Center et toute l'offre de sécurité de la gamme Forefront) ; l'axe des plateformes applicatives de Microsoft (SQL Server, Biztalk, .Net) ; et la partie infrastructures cloud computing (qui se développe très rapidement avec Windows et SQL Azure).

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  • Kernel compiling with -j2+ parameter ends prematurely with no error message or output bzImage

    - by Minix
    I've noticed quite a while ago that compiling a kernel with the parameter -j set to 1 or more doesn't produce a bzImage. Instead, it ends prematurely without any advice. I have reproduced the same behavior in both my netbook and home server. As far as I'm aware, the point where the compilation stops is random - Compiling twice with the same parameters will probably stop at different files. However, when I run make with no -j* parameter the compilation ends just fine and outputs a working bzImage. Both machines run Intel Atom (N270 on the netbook and 330 on the server) and I've compiled for these processors. If I recall correctly, I've tried compiling both with Atom and with generic x86_64 options. The kernel version I'm building is 2.6.34.1 I've always compiled normally with those options in my Core2Duo and Pentium Dual Core machines. Has anyone experienced this issue? Any ideas why does this happens? Is there a fix or workaround?

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  • Global Knowledge présente ses nouvelles formations sur le Cloud pour développeurs, DSI, chefs de projets, consultants ou architectes réseaux

    Global Knowledge présente ses nouvelles formations sur le Cloud Pour développeurs, DSI, chefs de projets, consultants ou architectes réseaux Global Knowledge, le centre de formation continue en informatique et management, vient d'ajouter de nouveaux cours sur le Cloud Computing à son catalogue de formations. On y trouve d'une part, un cursus certifiant de 21 jours conçu en partenariat avec Centrale Paris. Et d'autre part, un catalogue complet et structuré allant des fondamentaux (comprendre le Cloud Computing), à la conception d'une architecture ou encore la mise en oeuvre des solutions techniques comme la virtualisation. Elles s'adressent donc à un public la...

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  • How to get an X11 Window from a Process ID ?

    - by Adam Pierce
    Under Linux, my C++ application is using fork() and execv() to launch multiple instances of OpenOffice so as to view some powerpoint slide shows. This part works. Next I want to be able to move the OpenOffice windows to specific locations on the display. I can do that with the XMoveResizeWindow() function but I need to find the Window for each instance. I have the process ID of each instance, how can I find the X11 Window from that ? UPDATE - Thanks to Andy's suggestion, I have pulled this off. I'm posting the code here to share it with the Stack Overflow community. Unfortunately Open Office does not seem to set the _NET_WM_PID property so this doesn't ultimately solve my problem but it does answer the question. // Attempt to identify a window by name or attribute. // by Adam Pierce <[email protected]> #include <X11/Xlib.h> #include <X11/Xatom.h> #include <iostream> #include <list> using namespace std; class WindowsMatchingPid { public: WindowsMatchingPid(Display *display, Window wRoot, unsigned long pid) : _display(display) , _pid(pid) { // Get the PID property atom. _atomPID = XInternAtom(display, "_NET_WM_PID", True); if(_atomPID == None) { cout << "No such atom" << endl; return; } search(wRoot); } const list<Window> &result() const { return _result; } private: unsigned long _pid; Atom _atomPID; Display *_display; list<Window> _result; void search(Window w) { // Get the PID for the current Window. Atom type; int format; unsigned long nItems; unsigned long bytesAfter; unsigned char *propPID = 0; if(Success == XGetWindowProperty(_display, w, _atomPID, 0, 1, False, XA_CARDINAL, &type, &format, &nItems, &bytesAfter, &propPID)) { if(propPID != 0) { // If the PID matches, add this window to the result set. if(_pid == *((unsigned long *)propPID)) _result.push_back(w); XFree(propPID); } } // Recurse into child windows. Window wRoot; Window wParent; Window *wChild; unsigned nChildren; if(0 != XQueryTree(_display, w, &wRoot, &wParent, &wChild, &nChildren)) { for(unsigned i = 0; i < nChildren; i++) search(wChild[i]); } } }; int main(int argc, char **argv) { if(argc < 2) return 1; int pid = atoi(argv[1]); cout << "Searching for windows associated with PID " << pid << endl; // Start with the root window. Display *display = XOpenDisplay(0); WindowsMatchingPid match(display, XDefaultRootWindow(display), pid); // Print the result. const list<Window> &result = match.result(); for(list<Window>::const_iterator it = result.begin(); it != result.end(); it++) cout << "Window #" << (unsigned long)(*it) << endl; return 0; }

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