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• Cost Comparison Hard Disk Drive to Solid State Drive on Price per Gigabyte - dispelling a myth!

  - by tonyrogerson

  It is often said that Hard Disk Drive storage is significantly cheaper per GiByte than Solid State Devices – this is wholly inaccurate within the database space. People need to look at the cost of the complete solution and not just a single component part in isolation to what is really required to meet the business requirement. Buying a single…

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• Data Quality and Master Data Management Resources

  - by Dejan Sarka

  Many companies or organizations do regular data cleansing. When you cleanse the data, the data quality goes up to some higher level. The data quality level is determined by the amount of work invested in the cleansing. As time passes, the data quality deteriorates, and you need to repeat the cleansing process. If you spend an equal amount of…

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• Ambient occlusion shader just shows models as all white

  - by dvds414

  Okay so I have this shader for ambient occlusion. It loads to world correctly, but it just shows all the models as being white. I do not know why. I am just running the shader while the model is rendering, is that correct? or do I need to make a render target or something? If so then how? I'm using C++. Here is my shader: float…

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• July, the 31 Days of SQL Server DMO’s – Day 22 (sys.dm_db_index_physical_stats)

  - by Tamarick Hill

  The sys.dm_db_index_physical_stats Dynamic Management Function is used to return information about the fragmentation levels, page counts, depth, number of levels, record counts, etc. about the indexes on your database instance. One row is returned for each level in a given index, which we will discuss more later. The function…

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• SQL SERVER – ASYNC_IO_COMPLETION – Wait Type – Day 11 of 28

  - by pinaldave

  For any good system three things are vital: CPU, Memory and IO (disk). Among these three, IO is the most crucial factor of SQL Server. Looking at real-world cases, I do not see IT people upgrading CPU and Memory frequently. However, the disk is often upgraded for either improving the space, speed or throughput. Today we will…

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• SQL SERVER – IO_COMPLETION – Wait Type – Day 10 of 28

  - by pinaldave

  For any good system three things are vital: CPU, Memory and IO (disk). Among these three, IO is the most crucial factor of SQL Server. Looking at real-world cases, I do not see IT people upgrading CPU and Memory frequently. However, the disk is often upgraded for either improving the space, speed or throughput. Today we will…

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• Skewed: a rotating camera in a simple CPU-based voxel raycaster/raytracer

  - by voxelizr

  TL;DR -- in my first simple software voxel raycaster, I cannot get camera rotations to work, seemingly correct matrices notwithstanding. The result is skewed: like a flat rendering, correctly rotated, however distorted and without depth. (While axis-aligned ie. unrotated, depth and parallax are as expected.) I'm trying to…

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• How to translate along Z axis in OpenTK

  - by JeremyJAlpha

  I am playing around with an OpenGL sample application I downloaded for Xamarin-Android. The sample application produces a rotating colored cube I would simply like to edit it so that the rotating cube is translated along the Z axis and disappears into the distance. I modified the code by: adding an cumulative variable…

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• Texture displays on Android emulator but not on device

  - by Rob

  I have written a simple UI which takes an image (256x256) and maps it to a rectangle. This works perfectly on the emulator however on the phone the texture does not show, I see only a white rectangle. This is my code: public void onSurfaceCreated(GL10 gl, EGLConfig config) { byteBuffer =…

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• HLSL Shader not working right?

  - by dvds414

  Okay so I have this shader for ambient occlusion. It loads to world correctly, but it just shows all the models as being white. I do not know why. I am just running the shader while the model is rendering, is that correct? or do I need to make a render target or something? if so then how? I'm…

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• Memory leak with NSData

  - by Kamchatka

  I'm having a leak with this code without being able to find where it's coming from. This function get called within an autorelease pool. I release the IplImage* image argument. When I run the ObjAlloc tool, it tells me that "NSData* data" is leaking. If I try to manually release the UIImage…

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• Source of parsers for programming languages?

  - by Arkaaito

  I'm dusting off an old project of mine which calculates a number of simple metrics about large software projects. One of the metrics is the length of files/classes/methods. Currently my code "guesses" where class/method boundaries are based on a very crude algorithm (traverse the file,…

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• [SOLVED] How to create a FBO with stencil buffer in OpenGL ES 2.0?

  - by Alphones

  I need stencil buffer on 3GS to render planar shadow, and polygon offset won't work prefect, still has z-fighting problem. So I use stencil buffer to make the shadow correct, it works on win32 gles2 emulator, but not on iPhone. After I added a post effect to the whole scene. The stencil…

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• Asp.Net tree view in SharePoint webpart- Input string error

  - by Faiz

  Hi All, I am facing a very strange issue. I have a SharePoint webpart that displays an asp.net tree view. It takes tree depth from a drop down. To improve performance of the tree view, i am setting the PopulateOnDemand property to true for the last level of the tree depth. For…

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• Use a vector to index a matrix without linear index

  - by David_G

  G'day, I'm trying to find a way to use a vector of [x,y] points to index from a large matrix in MATLAB. Usually, I would convert the subscript points to the linear index of the matrix.(for eg. Use a vector as an index to a matrix in MATLab) However, the matrix is 4-dimensional,…

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• Using map/reduce for mapping the properties in a collection

  - by And

  Update: follow-up to MongoDB Get names of all keys in collection. As pointed out by Kristina, one can use Mongodb 's map/reduce to list the keys in a collection: db.things.insert( { type : ['dog', 'cat'] } ); db.things.insert( { egg : ['cat'] } ); db.things.insert( { type : …

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• Abstracting boxed array structures in J

  - by estanford

  I've been working on a J function for a while, that's supposed to scan a list and put consecutive copies of an element into separate, concatenated boxes. My efforts have taken me as far as the function (<;. 2) ((2&(~:/\)),1:) which tests successive list entries for…

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• Simulating 3D 'cards' with just orthographic rendering

  - by meds

  I am rendering textured quads from an orthographic perspective and would like to simulate 'depth' by modifying UVs and the vertex positions of the quads four points (top left, top right, bottom left, bottom right). I've found if I make the top left and bottom right corners…

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• How could I create a FBO with stencil buffer in OpenGL ES 2.0?

  - by Alphones

  I need stencil buffer on 3GS to render planar shadow, and polygon offset won't work prefect, still has z-fighting problem. So I use stencil buffer to make the shadow correct, it works on win32 gles2 emulator, but not on iPhone. After I added a post effect to the whole…

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• Mysterious Flickering Visual Artifact

  - by Axis

  A flashing bar of red appears at the top of the EAGLView that I have added as a subview in my iPhone app. It flickers on and off (i.e., one frame it's there, the next frame it's not, the next frame it's there again). I have removed a lot of code from my app until I'm…

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• Trouble with go tour crawler exercise

  - by David Mason

  I'm going through the go tour and I feel like I have a pretty good understanding of the language except for concurrency. On slide 71 there is an exercise that asks the reader to parallelize a web crawler (and to make it not cover repeats but I haven't gotten there…

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• PNG composition using GD and PHP

  - by Dominic

  I am trying to take a rectangular png and add depth using GD by duplicating the background and moving it down 1 pixel and right 1 pixel. I am trying to preserve a transparent background as well. I am having a bunch of trouble with preserving the transparency. …

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• Optimizing C++ Tree Generation

  - by cam

  Hi, I'm generating a Tic-Tac-Toe game tree (9 seconds after the first move), and I'm told it should take only a few milliseconds. So I'm trying to optimize it, I ran it through CodeAnalyst and these are the top 5 calls being made (I used bitsets to represent…

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• Globe SSL with NGINX SSL certificate problem, please help

  - by PartySoft

  I have a big problem with installing a certificat for nginx (same happends with apache though) I have 3 files __domain_com.crt __domain_com.ca-bundle and ssl.key. I tried to append cat __domain_com.crt __leechpack_com.ca-bundle bundle.crt but if I do it…

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• git problems installing stuff [closed]

  - by dale

  root@Frenzen:~# cd root@Frenzen:~# git clone --depth 1 git://source.ffmpeg.org/ffmpeg Initialized empty Git repository in /root/ffmpeg/.git/ root@Frenzen:~# cd root@Frenzen:~# git clone --depth 1 git://source.ffmpeg.org/ffmpeg Initialized empty Git…

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