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  • Swiss Re increases data warehouse performance and deploys in record time

    - by KLaker
    Great information on yet another data warehouse deployment on Exadata. A little background on Swiss Re: In 2002, Swiss Re established a data warehouse for its client markets and products to gather reinsurance information across all organizational units into an integrated structure. The data warehouse provided the basis for reporting at the group level with drill-down capability to individual contracts, while facilitating application integration and data exchange by using common data standards. Initially focusing on property and casualty reinsurance information only, it now includes life and health reinsurance, insurance, and nonlife insurance information. Key highlights of the benefits that Swiss Re achieved by using Exadata: Reduced the time to feed the data warehouse and generate data marts by 58% Reduced average runtime by 24% for standard reports comfortably loading two data warehouse refreshes per day with incremental feeds Freed up technical experts by significantly minimizing time spent on tuning activities Most importantly this was one of the fastest project deployments in Swiss Re's history. They went from installation to production in just four months! What is truly surprising is the that it only took two weeks between power-on to testing the machine with full data volumes! Business teams at Swiss Re are now able to fully exploit up-to-date analytics across property, casualty, life, health insurance, and reinsurance lines to identify successful products. These points are highlighted in the following quotes from Dr. Stephan Gutzwiller, Head of Data Warehouse Services at Swiss Re:  "We were operating a complete Oracle stack, including servers, storage area network, operating systems, and databases that was well optimized and delivered very good performance over an extended period of time. When a hardware replacement was scheduled for 2012, Oracle Exadata was a natural choice—and the performance increase was impressive. It enabled us to deliver analytics to our internal customers faster, without hiring more IT staff" “The high quality data that is readily available with Oracle Exadata gives us the insight and agility we need to cater to client needs. We also can continue re-engineering to keep up with the increasing demand without having to grow the organization. This combination creates excellent business value.” Our full press release is available here: http://www.oracle.com/us/corporate/customers/customersearch/swiss-re-1-exadata-ss-2050409.html. If you want more information about how Exadata can increase the performance of your data warehouse visit our home page: http://www.oracle.com/us/products/database/exadata-database-machine/overview/index.html

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  • Bouncing ball slowing down over time

    - by user46610
    I use the unreal engine 4 to bounce a ball off of walls in a 2D space, but over time the ball gets slower and slower. Movement happens in the tick function of the ball FVector location = GetActorLocation(); location.X += this->Velocity.X * DeltaSeconds; location.Y += this->Velocity.Y * DeltaSeconds; SetActorLocation(location, true); When a wall gets hit I get a Hit Event with the normal of the collision. This is how I calculate the new velocity of the ball: FVector2D V = this->Velocity; FVector2D N = FVector2D(HitNormal.X, HitNormal.Y); FVector2D newVelocity = -2 * (V.X * N.X + V.Y * N.Y) * N + V; this->Velocity = newVelocity; Over time, the more the ball bounced around, the velocity gets smaller and smaller. How do I prevent speed loss when bouncing off walls like that? It's supposed to be a perfect bounce without friction or anything.

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  • Analog and digital audio output at the same time

    - by wim
    My speakers use a digital input, but my headphones use an analog input. I have them both plugged in, and when I want to use the headphones I just turn off the speakers and switch on the headphones. I know that simultaneous output on digital and analog is supported by the hardware, because it worked fine in Windows XP. But on Ubuntu, I seem to only get one at a time, depending on which setting is selected in the combo box located at System -> Preferences -> Sound -> Hardware. How can I get simultaneous analog and digital output without having to switch the profile every time? I'm on Ubuntu 11.04 and it's an HDA Intel chip.

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  • Expected time for an CakePHP MVC form/controller and db make up

    - by hephestos
    I would like to know, what is an average time for building a form in MVC pattern with for example CakePHP. I build 8 functions, two of them do custom queries, return json data, split them, expand them in a model in memory and delivers to the view. Those are three queries if you consider and an array to feed view for making some combo box. Why? all these, because I have data from json and I split them in order to make row of data like a table. Like that I changed a bit the edit.ctp but not a lot. And I created a javascript outside, with three functions. One collects data the other upon a change of a combo returnes the selected values, and does also some redirection flow. All this, in average how much time should it take ?

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  • How to set Qwt path to the run-time linker in Xubuntu

    - by Rahul
    I've successfully installed Qwt in Xubuntu 12.04(qmake - make - make install). But now I need to set the Qwt path to run time linker of Xubuntu. In manual it's given like - If you have installed a shared library it's path has to be known to the run-time linker of your operating system. On Linux systems read "man ldconfig" ( or google for it ). Another option is to use the LD_LIBRARY_PATH (on some systems LIBPATH is used instead, on MacOSX it is called DYLD_LIBRARY_PATH) environment variable. But being newbie to Linux environment, I'm not able to proceed further. Please help me with this.

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  • time issue in render libgdx [duplicate]

    - by jaysingh
    This question is an exact duplicate of: time issue in render libgdx [duplicate] pls. help how to implement this loop in render method next_game_tick and GetTickCount(); always contain same time value. so position never updated @Override public void render() { float deltaTime = Gdx.graphics.getDeltaTime(); Update(deltaTime); Render(deltaTime); } const int TICKS_PER_SECOND = 50; const int SKIP_TICKS = 1000 / TICKS_PER_SECOND; const int MAX_FRAMESKIP = 10; DWORD next_game_tick = GetTickCount(); int loops; bool game_is_running = true; while( game_is_running ) { loops = 0; while( GetTickCount() > next_game_tick && loops < MAX_FRAMESKIP) { update_game(); next_game_tick += SKIP_TICKS; loops++; } display_game(); }

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  • Real Time Monitoring System using .net [closed]

    - by sameer
    I need to develop the application which display the dashboard where data from various SQL DB is fetched from different servers and displayed. Now this need to happen real time we can have refresh time say 5 min. Here is my thought, suggest if anything is wrong. 1) To Develop the Windows Service to accumulate the data from various SQL Server Instance. 2) Then Persist those details into SQL DB from which Dashboard will displayed on the web page. 3) Fetch of data from Windows service will be trigger every x minutes. 4) SQL Server Instance details will be stored in SQL DB which Windows Service will be referring. Thus this approach make sense. Thanks..

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  • Recommendations for finding part-time consultancy work

    - by Mark Heath
    Although I have a full-time development job, I have occasionally done some part-time paid work in evenings / weekends for various people who have contacted me as a result of open-source projects I have worked on. It's a nice way to earn a bit of extra cash, but obviously it is not always available. My question is, what is a good way of getting your name out there to do some small projects? I have seen a few programmers-for-hire type websites, but I don't know which I can trust or whether there are too many people willing to work for very low prices. Also, being UK based, I would want something which did not assume I have a US bank account.

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  • 12.04 - why does the network icon dissapear every time my machine is turned off

    - by Howard Walker
    After spending an hour or two working out how to find the network Icon, I find that when I reboot the machine, I have to go through the whole procedure again. 1. The network menu is not there - so first I have to find the terminal. This has no particular location that I can find but usually I have to type terminal in the dash. 2. Then I have to type nm-applet in terminal 3. The network manager icon then appears, but only works if the terminal window remains open. Shut down the terminal window and the network disappears. This is a pain - plus I have to type my password in every time, which is another waste of time, thought this has always been a problem. So can anyone tell me how to make the web automatically connect at startup without any intervention from me.

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  • Boot time seems unusually long on MSI GX660R (bootchart included)

    - by Sman789
    After upgrading (clean install) to Ubuntu 12.04, the speed issue when running programs has reduced on my MSI GX660R laptop. However, the boot time is still much longer (over a minute, even after BIOS) than on the many less powerful laptops I have encountered running the same OS, and I was wondering if anyone could help me improve it. I use the FGLRX driver, if that makes any difference. I have uploaded a boot chart, it can be found here http://imageshack.us/photo/my-images/4/bootchartl.png/ As you can see, the boot time is over a minute even after BIOS. A 'designed for Vista' laptop from ages ago which I installed Ubuntu on boots in around thirty seconds, so I think it's a bit strange. Output of dmesg: http://paste.ubuntu.com/1081359/ Output of /var/log/kern.log : http://paste.ubuntu.com/1081363/ Output of /var/log/syslog : http://paste.ubuntu.com/1081365/

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  • What is the Big-O time complexity of this algorithm

    - by grebwerd
    I was wondering what the run time of this small program would be? #include <stdio.h> int main(int argc, char* argv[]) { int i; int j; int inputSize; int sum = 0; if(argc == 1) inputSize = 16; else inputSize = atoi(argv[i]); for(i = 1; i <= inputSize; i++){ for(j = i; j < inputSize; j *=2 ){ printf("The value of sum is %d\n",++sum); } } } n S floor(log n - log (n-i)) = ? i =1 and that each summation would be the floor value between log(n) - log(n-i). Would the run time be n log n?

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  • Why are Back In Time snapshots so large?

    - by Chethan S.
    I just backed up the contents of my home partition onto my external hard drive using Back In Time. I browsed to the backed up contents in the external drive and under properties it showed me the size as 9.6 GB. As I read that in next snapshots I create, Back In Time does not backup everything but creates hard links for older contents and saves newer contents, I wanted to test it. So I copied two small files into my home partition and ran 'Take Snapshot' again. The operation completed within a minute - first it checked previous snapshot, assessed the changes, detected two new files and synced them. After this when I browsed to the backed up contents, I was surprised to see the newer and older backup taking up 9.6 GB each. Isn't this a waste of hard drive space? Or did I interpret something wrongly?

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  • Half the time Linux drop into BusyBox; the rest of the time the boot happens normally

    - by JoBu1324
    I just installed Ubuntu x64 onto a USB3 Drive from a DVD, and half the time it appears to skip the grub menu and boots directly into BusyBox. Since the USB3 drive is an SSD, I ran through the full installation (installing on an ext4 partition, along side a 1GB boot partition at the start of the disk), skipping the swap partition. Part of the time that the Grub Menu does shows, it boots into BusyBox with an error: ALERT! /dev/disk/by-uuid/[uid] does not exist. Dropping to a shell! What could cause such an issue?

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  • Movie Poster Colors Over Time

    - by Jason Fitzpatrick
    This spectrograph-like image records tens of thousands of movie posters over the course of a century, showing a steady shift towards posters that emphasize black, purple, and blue color tones. It’s a neat look at how the color tastes of an entire industry shift over time. Vijay Pandurangan had a disagreement with a friend about whether or not movie posters were becoming darker/bluer over time. Rather than simply agree to disagree, he whipped up a piece of code that downloaded and analyzed thousands of movie posters proving that, in fact, there was a slow and steady shift towards darker and bluer posters. Hit up the link below to see the interactive version (and larger!) version of his infographic as well as his explanation of the process and the source code. Colours In Movie Posters Since 1914 [via Flowing Data] HTG Explains: What Is Windows RT and What Does It Mean To Me? HTG Explains: How Windows 8′s Secure Boot Feature Works & What It Means for Linux Hack Your Kindle for Easy Font Customization

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  • Why can't the IT industry deliver large, faultless projects quickly as in other industries?

    - by MainMa
    After watching National Geographic's MegaStructures series, I was surprised how fast large projects are completed. Once the preliminary work (design, specifications, etc.) is done on paper, the realization itself of huge projects take just a few years or sometimes a few months. For example, Airbus A380 "formally launched on Dec. 19, 2000", and "in the Early March, 2005", the aircraft was already tested. The same goes for huge oil tankers, skyscrapers, etc. Comparing this to the delays in software industry, I can't help wondering why most IT projects are so slow, or more precisely, why they cannot be as fast and faultless, at the same scale, given enough people? Projects such as the Airbus A380 present both: Major unforeseen risks: while this is not the first aircraft built, it still pushes the limits if the technology and things which worked well for smaller airliners may not work for the larger one due to physical constraints; in the same way, new technologies are used which were not used yet, because for example they were not available in 1969 when Boeing 747 was done. Risks related to human resources and management in general: people quitting in the middle of the project, inability to reach a person because she's on vacation, ordinary human errors, etc. With those risks, people still achieve projects like those large airliners in a very short period of time, and despite the delivery delays, those projects are still hugely successful and of a high quality. When it comes to software development, the projects are hardly as large and complicated as an airliner (both technically and in terms of management), and have slightly less unforeseen risks from the real world. Still, most IT projects are slow and late, and adding more developers to the project is not a solution (going from a team of ten developer to two thousand will sometimes allow to deliver the project faster, sometimes not, and sometimes will only harm the project and increase the risk of not finishing it at all). Those which are still delivered may often contain a lot of bugs, requiring consecutive service packs and regular updates (imagine "installing updates" on every Airbus A380 twice per week to patch the bugs in the original product and prevent the aircraft from crashing). How can such differences be explained? Is it due exclusively to the fact that software development industry is too young to be able to manage thousands of people on a single project in order to deliver large scale, nearly faultless products very fast?

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  • How much time it will take to learn 3ds Max

    - by Mirror51
    I am not a 3d developer but i want to lean 3ds max just for simple house building with 2-3 rooms. Actually i don't want to develop from scratch . What i really want to do is get the existing models of homes , rooms , hotels from the internet and add my name there or my photo there , just for fun . SO i want to know that how much time do u think it will take me to that sort of stuff. Its not my career but just hobby . If its going to take longer time , then i don't want to waste but i can get going in one week or so that will go good but i want to ask from experience developers thanks

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  • Contiguous Time Periods

    It is always more efficient to maintain referential integrity by using constraints rather than triggers. Sometimes it isn't obvious how to do this. Until a recent idea by Alex Kuznetsov, the history table presented problems for checking data that were difficult to solve with constraints. Joe Celko explains. Free trial of SQL Backup™“SQL Backup was able to cut down my backup time significantly AND achieved a 90% compression at the same time!” Joe Cheng. Download a free trial now.

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  • How to lower wait time for repository updates

    - by Luis
    When doing a aptitude update / apt-get update or using the Update Manager to update sometimes I get to a repository link that takes too long. The percent does not end and it takes quite a while before it ignores it. How can I lower the time so that if a particular repository takes more than 10 seconds to connect or finish it should ignore it and move the following ones. Here is an image explaining the problem: It is trying to connect to archive.ubuntu.com but since it is taking too long it just sits there for at least 3 to 5 minutes (Haven't measured the time) and then it shows as ignored and moves to the following. I wish to change that to seconds instead of minutes.

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  • IonMonkey : Mozilla renforce les performances JavaScript de Firefox, avec l'optimisation de la compilation Just in Time

    IonMonkey : Mozilla renforce les performances JavaScript de Firefox Avec l'optimisation de la compilation Just in Time Avec la complexité grandissante des applications Web interactives, les navigateurs web se doivent d'être toujours plus performants. C'est ce que fait Mozilla en travaillant sur une nouvelle architecture de compilation JavaScript. IonMonkey est le nouveau compilateur « Just In Time » en test du navigateur Firefox pour le langage JavaScript. Il verra le jour en tant que composant à part entière de Firefox 18 en début 2013. IonMonkey se distingue du courant JIT JägerMonkey avec l'étape d'optimisation. Il est destiné aux applications JavaScript qui fonct...

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  • Game Asset Size Over Time

    - by jterrace
    The size (in bytes) of games have been growing over time. There are probably many factors contributing to this: trailer/cut scene videos being bundled with the game, more and higher-quality audio, multiple levels of detail being used, etc. What I'd really like to know is how the size of 3D models and textures that games ship with have changed over time. For example, if one were to look at the size of meshes and textures for Quake I (1996), Quake II (1997), Quake III: Arena (1999), Quake 4 (2005), and Enemy Territory: Quake Wars (2007), I'd imagine a steady increase in file size. Does anyone know of a data source for numbers like this?

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  • Ubuntu 12.04 won't boot at all for the first time

    - by user76280
    Using http://www.ubuntu.com/download/desktop/windows-installer So I tried installing Ubuntu for the first time today, and it installed all well, but then it froze at the 'Preparing to run Ubuntu for the first time...' screen. I then proceeded to restart my computer and load Ubuntu from the OS selection screen. My screen completely froze and the picture didn't even come up fully as if my video driver was not installed correctly. Are there any fixes to this problem? Would greatly appreciate it. Possible useful information: Using http://www.ubuntu.com/download/desktop/windows-installer Dual-booting with Windows

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