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• help installing some java and flash

  - by william

  ok so i have git now and some other stuff but ive looked around and all and i dont get very help full info Instructions 1 Download the latest version of Flash Player from the Adobe Website. Click on "Download the Latest Player," and choose ".deb for Ubuntu" from the drop down list. 2 Choose "Save File" from the pop up window. Sponsored Links Google Cloud Hosting Build And Run Your App Using Google App Engine cloud.google.com/appengine 3 Open a terminal window. The terminal window will be found under Applications - Utilities. 4 Change to the directory where your downloaded file was saved. cd Download 5 Install the libcurl3 library. sudo apt-get install libcurl3 6 Install the Flash Player. sudo dpkg --install install_flash_player__linux.deb Replace with the latest version number. 7 Restart Firefox. 8 Check that Flash Player was installed. Type about:plugins in a browser window, and look for the flash player MIME type. Read more: http://www.ehow.com/how_5068467_install-flash-player-ubuntu.html#ixzz2ixPj47qS what i dont is how the heck i change the directory and all that crap witch they say every one know

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• Android-Libgdx-ProGuard: Usefulness without DexGuard? [on hold]

  - by Rico Pablo Mince

  So I'm developing a game for Android - using LibGDX - and noticed that the Android SDK (HDK, MDK, WhatTheHellEvarDK) has ProGuard built-in. Browsing the ProGuard page is like searching Google: you get that the idea is to sell some product (in this case, it's DexGuard). That leaves me wondering what features are left out of ProGuard that a game developer targeting Android should worry about. For instance, the ProGuard FAQs answer the question: "Does ProGuard encrypt string constants?" by saying: "No. String encryption in program code has to be perfectly reversible by definition, so it only improves the obfuscation level. It increases the footprint of the code. However, by popular demand, ProGuard's closed-source sibling for Android, DexGuard, does provide string encryption, along with more protection techniques against static and dynamic analysis." Alright. OK. But isn't "...improves the obfuscation level" EXACTLY what ProGuard is supposed to do? Are there better options that can be implemented at build-time in Eclipse using the Gradle options and Libgdx? In particular, the assets folder and res-specific folders will need some protection. The code itself doesn't cure cancer, but I'd prefer if nobody could copy/paste it with different game art and call it "IhAxEdUrGamE"....

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• How do I choose the scaling factor of a 3D game world?

  - by concept3d

  I am making a 3D tank game prototype with some physics simulation, am using C++. One of the decisions I need to make is the scale of the game world in relation to reality. For example, I could consider 1 in-game unit of measurement to correspond to 1 meter in reality. This feels intuitive, but I feel like I might be missing something. I can think of the following as potential problems: 3D modelling program compatibility. (?) Numerical accuracy. (Does this matter?) Especially at large scales, how games like Battlefield have huge maps: How don't they lose numerical accuracy if they use 1:1 mapping with real world scale, since floating point representation tend to lose more precision with larger numbers (e.g. with ray casting, physics simulation)? Gameplay. I don't want the movement of units to feel slow or fast while using almost real world values like -9.8 m/s^2 for gravity. (This might be subjective.) Is it ok to scale up/down imported assets or it's best fit with a world with its original scale? Rendering performance. Are large meshes with the same vertex count slower to render? I'm wondering if I should split this into multiple questions...

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• White box testing with Google Test

  - by Daemin

  I've been trying out using GoogleTest for my C++ hobby project, and I need to test the internals of a component (hence white box testing). At my previous work we just made the test classes friends of the class being tested. But with Google Test that doesn't work as each test is given its own unique class, derived from the fixture class if specified, and friend-ness doesn't transfer to derived classes. Initially I created a test proxy class that is friends with the tested class. It contains a pointer to an instance of the tested class and provides methods for the required, but hidden, members. This worked for a simple class, but now I'm up to testing a tree class with an internal private node class, of which I need to access and mess with. I'm just wondering if anyone using the GoogleTest library has done any white box testing and if they have any hints or helpful constructs that would make this easier. Ok, I've found the FRIEND_TEST macro defined in the documentation, as well as some hints on how to test private code in the advanced guide. But apart from having a huge amount of friend declerations (i.e. one FRIEND_TEST for each test), is there an easier idion to use, or should I abandon using GoogleTest and move to a different test framework?

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• Highly SEO optimised forum posts

  - by Tom Gullen

  Given the following forum post: Basics of how internals of Construct work I've used GameMaker in the past. And I know some C++ and have used a few 3d engines with it. I have also looked at Unity, though I didn't get too much into it. So I know my way around programming etc... My question is, how does construct work internally? I know it allows python scripting, which itself is "technically" interpreted, though python is pretty fast as far as being interpreted goes. But what about the rest? Is the executable that gets cre... The forum software will take the first 150 chars of the first post as the page meta description, and the title will be the thread title. All ok. So in Google it will appear as: Basics of how internals of Construct work I've used GameMaker in the past. And I know some C++ and have used a few 3d engines with it. I have also looked at Unity, though I didn't get too much... http://www.domain.com/forum/basics-of-how-internals-of-construct-work.html Now the problem is (not so much with this thread, but other ones) is the first 150 chars don't always create the best meta description. Is it worth my time to cherry pick threads and manually set their description/title tags so they read like: Internal workings of Construct 2 Events aren't converted to any other language. The runtime is a standalone compiled EXE application, which is optimised and actually very fast. Your events... http://www.domain.com/forum/basics-of-how-internals-of-construct-work.html The H1 on the page is still the original title, but we have overridden the title and description to look more friendly on search results. Is this advantageous forgetting the obvious time cost?

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• Partial upgrade on 12.04, how to stop nagging after locking to a working NVIDIA & xorg

  - by alsk

  How to stop the upgrade manager from offering updates and upgrades that potentially would harm my working 2D and 3D graphics? Finally, I got 12.04 working as it should: with nvidia-173 drivers by downgrading xorg and locking the version: On my 32-bit system on Athlon64, with (Albatron) NVIDIA GeForce FX5700XT, locked (/pinned) to xorg 1:7.6-7ubuntu7, xserver-xorg-core 2:11.1-0obuntu10.07, nvidia-173 173.14.35-0ubuntu0.2? An annoying thing left is that every time the updates are checked, I get warning of partial updates, and ambiguous options of "partial update" and "close". Ambiguous in that sense that if I click close, I will get option to update a few packages, which has been OK, while "partial update" would like to update my kernel to 3.2, alter xorg, remove nvidia-173 etc., and update mesa etc. This is not what I call appropriate, after locking XORG and NVIDIA drivers to working ones. One may say according to package management logic it may be correct, but to me as an user it makes little sense. Last Ubuntu that worked without big mess for me was 10.10, hence I will not put 12.10 to my "production" system, until I can be sure it will not trash the system again. P.S. Is there a recommended way to keep NVIDIA GeForce FX working with 3D on Ubuntu... in future?

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• mdadm starts resync on every boot

  - by Anteru

  Since a few days (and I'm positive it started shortly before I updated my server from 13.04-13.10) my mdadm is resyncing on every boot. In the syslog, I get the following output [ 0.809256] md: linear personality registered for level -1 [ 0.811412] md: multipath personality registered for level -4 [ 0.813153] md: raid0 personality registered for level 0 [ 0.815201] md: raid1 personality registered for level 1 [ 1.101517] md: raid6 personality registered for level 6 [ 1.101520] md: raid5 personality registered for level 5 [ 1.101522] md: raid4 personality registered for level 4 [ 1.106825] md: raid10 personality registered for level 10 [ 1.935882] md: bind<sdc1> [ 1.943367] md: bind<sdb1> [ 1.945199] md/raid1:md0: not clean -- starting background reconstruction [ 1.945204] md/raid1:md0: active with 2 out of 2 mirrors [ 1.945225] md0: detected capacity change from 0 to 2000396680192 [ 1.945351] md: resync of RAID array md0 [ 1.945357] md: minimum _guaranteed_ speed: 1000 KB/sec/disk. [ 1.945359] md: using maximum available idle IO bandwidth (but not more than 200000 KB/sec) for resync. [ 1.945362] md: using 128k window, over a total of 1953512383k. [ 2.220468] md0: unknown partition table I'm not sure what's up with that detected capacity change, looking at some old logs, this does have appeared earlier as well without a resync right afterwards. In fact, I let it run yesterday until completion and rebooted, and then it wouldn't resync, but today it does resync again. For instance, yesterday I got: [ 1.872123] md: bind<sdc1> [ 1.950946] md: bind<sdb1> [ 1.952782] md/raid1:md0: active with 2 out of 2 mirrors [ 1.952807] md0: detected capacity change from 0 to 2000396680192 [ 1.954598] md0: unknown partition table So it seems to be a problem that the RAID array does not get marked as clean after every shutdown? How can I troubleshoot this? The disks themselves are both fine, SMART tells me no errors, everything ok.

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• Version control for game development - issues and solutions?

  - by Cyclops

  There are a lot of Version Control systems available, including open-source ones such as Subversion, Git, and Mercurial, plus commercial ones such as Perforce. How well do they support the process of game-development? What are the issues using VCS, with regard to non-text files (binary files), large projects, etc? What are solutions to these problems, if any? For organization of Answers, let's try on a per-package basis. Update each package/Answer with your results. Also, please list some brief details in your answer, about whether your VCS is free or commercial, distributed versus centralized, etc. Update: Found a nice article comparing two of the VCS below - apparently, Git is MacGyver and Mercurial is Bond. Well, I'm glad that's settled... And the author has a nice quote at the end: It’s OK to proselytize to those who have not switched to a distributed VCS yet, but trying to convert a Git user to Mercurial (or vice-versa) is a waste of everyone’s time and energy. Especially since Git and Mercurial's real enemy is Subversion. Dang, it's a code-eat-code world out there in FOSS-land...

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• KERPOOOOW!

  - by Matt Christian

  Recently I discovered the colorful world of comic books.  In the past I've read comics a few times but never really got into them.  When I wanted to start a collection I decided either video games or comics yet stayed away from comics because I am less familiar with them. In any case, I stopped by my local comic shop and picked up a few comics and a few trade paperbacks.  After reading them and understanding their basic flow I began to enjoy not only the stories but the art styles hiding behind those little white bubbles of text (well, they're USUALLY white).  My first stop at the comic store I ended up with: - Nemesis #1 (cover A) - Shuddertown #1 (cover A I think) - Daredevil: King of Hell's Kitchen Trade Paperback - Peter Parker: Spiderman - One Small Break Trade Paperback It took me about 3-4 days to read all of that including re-reading the single issues and glancing over the beginning of Daredevil again.  After a week of looking around online I knew a little more about the comics I wanted to pick up and the kind of art style I enjoyed.  While Peter Parker: Spiderman was ok, I really enjoyed the detailed, realistic look of Daredevil and Shuddertown. Now, a few years back I picked up the game The Darkness for PS3.  I knew it was based off a comic but never read the comic.  I decided I'd pick up a few issues of it and ended up with: - The Darkness #80 (cover A) - The Darkness #81 (cover A) - The Darkness #82 (cover A) - The Darkness #83 (cover A) - The Darkness Shadows and Flame #1  (one-shot; cover A) - The Darkness Origins: Volume 1 Trade Paperback (contains The Darkness #1-6) - New Age boards and bags for storing my comics The Darkness is relatively good though jumping from issue #6 to issue #80 I lost a bit on who the enemy in the current series is.  I think out of all of them, issue #83 was my favorite of them. I'm signed up at the local shop to continue getting Nemesis, The Darkness, and Shuddertown, and I'll probably pick up a few different ones this weekend...

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• checking for collision detection

  - by bill

  I am trying to create a game where you have a player and you can move right,left, and jump. kind of like mario but its not a side scroller. also i want to use 2d array to make a tile map. my big problem is that i dont understand how to check for collision. i spend about 2 week thinking about this and i came up with 2 solution but they both have problems. let say my map is: 0 = sky 1 = player 2 = ground 00000 10002 22022 Solution 1: move the '1'(player) and update the map less say player wants to move right, then x+=grid[x+1][y] this make the collision easy bc you can just check if if(grid[x][y+1] == 2){ //player is standing on top of ground } problem with this when u hit right key player will move (x*Titlewidth) to right. and as you can see the animation wont look smooth. Solution 2: move player and dont update map player_x += 2 this will make the animation more smoother bc i am just moving 2 pixels. problem1: i cant update map bc if player some times will be middle of int(2d array). but thats ok sinces its not a side scroller so updating the map is not a big deal. problem2: only way to check for collision is to use java intersection method. but then player have to be atleast 1 or 2 pixel in ground in order to check for collision. and as you can see that wont look good too. plz note this is my first collision game in java. so plz try to explain alot otherwise i wont understand it.

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• Record 8 separate Line IN Channels from M-Audio Delta 1010 Card

  - by Peter Hoffmann

  I want to record the 8 separate Line IN Channels from my M-Audio Delta 1010 Card. The card is recogniced nicely and a can record a single channel via arecord -d 10 -f cd -t wav -D channel1 out2.wav. I've set up the different channels in ~/.asoundrc. Now if I want to record a second channel in parallel (arecord -d 10 -f cd -t wav -D channel2 out2.wav) I get the error arecord: main:564: audio open error: Device or resource busy As I understand the delta 1010 is a single Access Card, so only one application can access it at a time. Is this correct? The next step was to configure a dual channel input in .asoundrc # envy24 channel 1+2 only pcm.test { type plug ttable.0.0 1 ttable.0.1 1 slave.pcm ice1712 } Which works ok when I do a arecord -d 10 -f cd -t wav -D test -c 2 out.wav (BTW can anyone point me to a tool to split a multi channel wav into a file per channel?) But when I want to record the channels separately with (-I option) arecord -d 10 -f cd -t wav -D test -c 2 -I channel1.wav channel2.wav I get no recordings. Did I miss something with the configuration or what are my options to record all 8 channels via arecord. I've no experience with jackd. Is it an option to install jackd and record the line ins via jackd?

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• Should my dropdown of recently used items show items I no longer have access to

  - by Dan Hibbert

  We are implementing a client for our document management system. Part of this is the checkin screen where one of the fields a user chooses is the folder where the document should be checked into. In our original system, this was represented with a combobox where a user could hand type a folder path or select a path from a list of 5 folders they'd recently used for checking. It is possible that between the time they used the folder and the time they are doing the new checkin the user will no longer have access to the folder. At present, we still show the folder as an option and then, if the user chooses that folder, display an error message when the user submits the check in. We are thinking of removing these recently used folders the user doesn't have access to (we'll make a check when the form is instantiated) because why show an option if we know it will cause a failure (and another dialog message the user has to OK). However, an opposite opinion is that if we remove those folders, the users will think the system has "forgotten" their recent choices and will lose trust in what they are using. I'd like to get some opinions on the better user experience for this problem.

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• Autocomplete in Silverlight with Visual Studio 2010

  - by Sayre Collado

  Last week I keep searching on how to use the autocomplete in silverligth with visual studio 2010 but most of the examples that I find they are using a textbox or combobox for the autocomplete. I tried to study those examples and apply to the single autocomplete from tools on my silverlight project. And now this is the result. I will use a database again from my previous post (Silverlight Simple DataBinding in DataGrid) to show how the autocomplete works with database. This is the output: First, this is the setup for my autocomplete: //The tags for autocompletebox on XAML Second, my simple snippets: //Event for the autocomplete to send a text string to my function private void autoCompleteBox1_KeyUp(object sender, KeyEventArgs e) { autoCompleteBox1.Populating += (s, args) => { args.Cancel = true; var c = new Service1Client(); c.GetListByNameCompleted +=new EventHandler(c_GetListByNameCompleted); c.GetListByNameAsync(autoCompleteBox1.Text); }; } //Getting result from database void c_GetListByNameCompleted(object sender, GetListByNameCompletedEventArgs e) { autoCompleteBox1.ItemsSource = e.Result; autoCompleteBox1.PopulateComplete(); } The snippets above will show on how to use the autocompleteBox using the data from database that bind in DataGrid. But what if we want to show the result on DataGrid while the autocomplete changing the items source? Ok just add one line to c_GetListByNameCompleted void c_GetListByNameCompleted(object sender, GetListByNameCompletedEventArgs e) { autoCompleteBox1.ItemsSource = e.Result; autoCompleteBox1.PopulateComplete(); dataGrid1.ItemsSource = e.Result; }

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• Software licensing and code generation

  - by Nicol Bolas

  I'm developing a tool that generates code from some various data. The tool itself will be licensed with the MIT license, which strikes a good balance for me in terms of allowing the freedom to use and modify it, while still holding the copyright. OK, but what is the legal status of the code generated by the tool? Who holds the copyright for code generated by a tool? Do I need to give users of the tool a license for the generated code, or do they already have that by virtue of it being generated by them? What is different about this code generation system (which may be relevant) is that the source information about the code generation is provided by the system itself. The user doesn't feed source data in; the source data is bundled along with it. They simply have the means to transform it in various ways (filtering out parts of the data they don't want, etc). Obviously they could edit the bundled data. Does that affect anything about this?

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• A little tidbit on Team Build 2010 and error MSB3147

  - by Enrique Lima

  The problem? Performing a build on a ClickOnce solution would not be successful due to the setup.bin not being located. Ok, now what? Researched from corner to corner, install, re-install, update.  Found some interesting posts to fix the issue, but most of them were focused on Team Foundation Server/Team Build 2008, and some other on 2005.  The other interesting tidbit was the frequent indication to modify the registry to help Team Build find the bootstrapper. Background info:  This was a migration I posted about a few days ago, a 32 bit TFS implementation to a full 64 bit TFS implementation.  Now, the project has binaries and dependencies on X86 (This piece of information became essential to moving from a failed build to a successful build). So, what’s the fix? The trick in this case was to go back into the Build Type and check the properties/configuration.  Upon further investigation, I found the following:  Once you Edit the Build Definition, then select Process, expand 3. Advanced and look for MSBuild Platform, switch from Auto to X86.  Ran the Build, and success!

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• Managing flash animations for a game

  - by LoveMeSomeCode

  Ok, I've been writing C# for a while, but I'm new to ActionScript, so this is a question about best practices. We're developing a simple match game, where the user selects tiles and tries to match various numbers - sort of like memory - and when the match is made we want a series of animations to take place, and when they're done, remove the tile and add a new one. So basically it's: User clicks the MC Animation 1 on the MC starts Animation 1 ends Remove the MC from the stage Add a new MC Start the animation on the new MC The problem I run into is that I don't want to make the same timeline motion tween on each and every tile, when the animation is all the same. It's just the picture in the tile that's different. The other method I've come up with is to just apply the tweens in code on the main stage. Then I attach an event handler for MOTION_FINISH, and in that handler I trigger the next animation and listen for that to finish etc. This works too, but not only do I have to do all the tweening in code, I have a seperate event handler for each stage of the animation. So is there a more structured way of chaining these animations together?

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• Odd Android touch event problem

  - by user22241

  Overview When testing my game I came across a bizarre problem with my touch controls. Note this isn't related to multi-touch as I completely removed my ACTION_POINTER_UP and ACTION_POINTER_DOWN along with my ACTION_MOVE code. So I'm simply working with ACTION_UP and ACTION_DOWN now and still get the problem. The problem I have a left and right button on the left of the screen and a jump button on the right. Everything works as it should but if I touch a large area of my hand (the fleshy part at the base of the thumb for instance) onto the screen, then release it and then press one of my arrows, the sprite moves in that direction for a few seconds, and then ACTION_UP is mysteriously triggered. The sprite stops and then if I release my finger and re-apply it to an arrow, the same thing happens. This goes on and on and eventually (randomly??) stops and everything work OK again. Test device & OS Google Nexus 10 Tablet running Jellybean 4.2.2 Code //Action upon which to switch actionMask = event.getActionMasked(); //Pointer Index of the currently touching pointer pointerIndex = event.getActionIndex(); //Number of pointers (for multi-touch) pointerCount = event.getPointerCount(); //ID of the pointer currently being processed (Multitouch) pointerID = event.getPointerId(pointerIndex); switch (actionMask){ //Primary pointer down case MotionEvent.ACTION_DOWN: { //if pressing left button then set moving left if (isLeftPressed(event.getX(), event.getY())){ renderer.setSpriteLeft(); } //if pressing right button then set moving right else if (isRightPressed(event.getX(), event.getY())){ renderer.setSpriteRight(); } //if pressing jump button then set sprite jumping else if (isJumpPressed(event.getX(),event.getY())){ renderer.setSpriteState('j', true); } break; }//End of case //Primary pointer up case MotionEvent.ACTION_UP:{ //When finger leaves the screen, stop sprite's horizontal movement renderer.setSpriteStopped(); break; }

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• Gems In The Visual Studio 2010 Training Kit - Introduction to ASP.NET MVC: Learning Labs

  - by Jim Duffy

  Following up on my prior “gems post” is another nugget I found in the Visual Studio 2010 and .NET Framework 4 Training Kit. ASP.NET MVC has established quite a bit of momentum in the ASP.NET development community since it was introduced in early-ish 2009 though I’m sure there are many developers who haven’t had the time or opportunity to find out what it is, not to mention learn how to use it. If you’re one of those “I’ve heard of it but I’m not sure what it really is” developers then I suggest you start your research here. Ok, back to the gem. There are a number of fantastic MVC learning resources out there including the video tutorials on the ASP.NET MVC website. Another learning resource for your journey along the yellow brick road into ASP.NET MVC land are the hands-on learning labs contained in the Visual Studio 2010 and .NET Framework 4 Training Kit. These hands-on exercises walk you through the process of creating the “M”, the “V”s, and the “C”s of ASP.NET MVC and help you gain a solid foothold into the details of creating and understanding ASP.NET MVC applications. Have a day. :-|

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• What is the best way to check if there is overlap between player and static, non-collidable items in bullet physic engine

  - by tigrou

  I'd like to add non collidable objects (eg: power ups, items, ...) in a game world using Bullet Physics Engine and to know if there is collision between player and them. Some info : there is a lot of items ( 1000), all are box shapes and they don't overlap. Here is things i have tried : btDbvt* bvtItems = new btDbvt(); //btDbvt is a hierachical AABB tree, used by Bullet foreach(var item ...) { btDbvtVolume volume = ... //compute item AABB; bvtItems->insert(volume, (void*)someExtraData); } Then, to find collisions between items and player : playerRigidBody->getAabb(min, max); btDbvtVolume playervolume = ... //compute player AABB bvtItems->collideTV(bvtItems->m_root, playervolume, *someCollisionHandler); This works fairly well (and its very fast), however, there is a problem : it only check items AABB against player AABB. That loss of precision is acceptable for items but not for player which is not a box. It would actually need another check to make sure player really collide with item but i don't know how to do this in Bullet. It would have been nice to have a function like this : playerRigidBody->checkCollisionWithAABB(); After doing trying that, I discovered that a btGhostObject exist and seems to have been made for that. I changed my code like this : foreach(var item...) { btCollisionObject* ghostObject = new btGhostObject(); ghostObject->setCollisionShape(boxShape); ghostObject->setCollisionFlags(ghostObject->getCollisionFlags() | btCollisionObject::CF_NO_CONTACT_RESPONSE); startTransform.setOrigin(...); //item position ghostObject->setWorldTransform(startTransform); dynamicsWorld->addCollisionObject(ghostObject, btBroadphaseProxy::SensorTrigger, btBroadphaseProxy:: CharacterFilter); } It also works ok, but there is a huge fps drop (almost ten times slower) which is not acceptable. Maybe there is something missing (forget set a flag) and Bullet is doing extra job for nothing or maybe all that ghostObjects are polluting broad phase and ghostObject is not the right thing for that. Any help would be appreciated.

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• Unable to mount smb share. "Please select another viewer and try again". Please help. Serious smb/nautilus foo needed

  - by oznah

  This don't think this is the typical, "I can't mount a windows share" post. I am using stock Ubuntu 12.04. I am pretty sure this is a Nautilus issue, but I have reached a dead end. I have one share that I can't mount using smb://server/share via nautilus. I get the following error. Error: Failed to mount Windows share Please select another viewer and try again I can mount this share from other machines(non-ubuntu) using the same credentials so I know I have perms on the destination share. I can mount other shares on other servers from my Ubuntu box so I am pretty sure I have all the smb packages I need on my Ubuntu box. To make thing more interesting, if I use smbclient from the command line, I mount this share with no problems from my Ubuntu box. So here's what we know: destination share perms are ok (no problem accessing from other machines) smb is setup correctly on Ubuntu box (access other windows shares no problem) I only get the error when using nautilus smbclient in terminal works, no problem Any help would be greatly appreciated. Googling turned up simple mount/perms issues, and I don't think that is what is going on here. Let me know if you need more information. Hugh

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• Building a Redundant / Distrubuted Application

  - by MattW

  This is more of a "point me in the right direction" question. I (and my team of 3) have built a hosted web app that queues and routes customer chat requests to available customer service agents (It does other things as well, but this is enough background to illustrate the issue). The basic dev architecture today is: a single page ajax web UI (ASP.NET MVC) with floating chat windows (think Gmail) a backend Windows service to queue and route the chat requests this service also logs the chats, calculates service levels, etc a Comet server product that routes data between the web frontend and the backend Windows service this also helps us detect which Agents are still connected (online) And our hardware architecture today is: 2 servers to host the web UI portion of the application a load balancer to route requests to the 2 different web app servers a third server to host the SQL Server DB and the backend Windows service responsible for queuing / delivering chats So as it stands today, one of the web app servers could go down and we would be ok. However, if something would happen to the SQL Server / Windows Service server we would be boned. My question - how can I make this backend Windows service logic be able to be spread across multiple machines (distributed)? The Windows service is written to accept requests from the Comet server, check for available Agents, and route the chat to those agents. How can I make this more distributed? How can I make it so that I can distribute the work of the backend Windows service can be spread across multiple machines for redundancy and uptime purposes? Will I need to re-write it with distributed computing in mind? I should also note that I am hosting all of this on Rackspace Cloud instances - so maybe it is something I should be less concerned about? Thanks in advance for any help!

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• How to let maas' cloud-init client select internal mirror?

  - by Michael

  Our maas lan can't access internet and have a internal apt-mirror site 192.168.3.6. I changed mirror set of maas server's snippets/maas_proxy file like: d-i mirror/country string manual d-i mirror/http/hostname string 192.168.3.6 d-i mirror/http/directory string /ubuntu d-i mirror/http/proxy string I deployed two maas node ok. Dashboard show the two node's state are ready. But node's cloud-init client changed the apt's sources.list like this: ## Note, this file is written by cloud-init on first boot of an instance ## modifications made here will not survive a re-bundle. ## if you wish to make changes you can: ## a.) add 'apt_preserve_sources_list: true' to /etc/cloud/cloud.cfg ## or do the same in user-data ... deb http://archive.ubuntu.com/ubuntu precise main deb-src http://archive.ubuntu.com/ubuntu precise main ... Directly use cobbler install node(without maas), the node apt's sources.list like: ... deb http://192.168.3.6/ubuntu precise main deb-src http://192.168.3.6/ubuntu precise main ... My question is: How to set user-data in maas? So that I can set cloud-init's mirror's url to 192.168.3.6 or prevent cloud-init to change mirror's url. Maas node's file /home/ubuntu/.ssh/authorized_keys is empty. Is it caused by the mirror's setup?

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• A Big Data korszakban, túl az 1000. eladott Oracle Exadata Database Machine adatbázisgépen

  - by user645740

  Mint azt már egy ideje a szél is fújja, beköszöntött a BIG DATA korszak, azaz egyre több adat gyulik, egyre több adattal gazdálkodunk. A hatalmas mennyiségu adat jó részét Oracle adatbázisokban tárolják. Mi is futtathatná jobban, gyorsabban és hetékonyabban ezeket az Oracle adatbázisokat, mint az Oracle stratégiai high-end megoldása az Oracle Exadata Database Machine? Rengeteg forrása van a sok adatnak, néhány példa, ahol a növekedés óriási: kommunikációs adatok, CDR-ek banki és kormányzati tranzakciók hely információk spatial, location, GPS,..., mint ahogyan a közelmúltban az egyes telefonokkal ésoperációs rendszerekkel kapcsolatos "ügyekben" is olvashattuk, e-mail-ek, közösségi site-ok, intelligens méromuszerek, háztartási berendezések, .... Milyen ütemben no az Exadata értékesítés? Nos az Exadata 2008 oszén lett bejelentve. Az Oracle pénzügyi év végén a jelentésben azt olvashatjuk, hogy az Exadata páratlanul sikeres megoldás, már több mint 1000 Exadatát vásároltak meg az Oracle ügyfelek, mondta Mark Hurd, az Oracle alelnöke:   “In addition to record setting software sales, our Exadata and Exalogic systems also made a strong contribution to our growth in Q4,” said Oracle President, Mark Hurd. “Today there are more than 1,000 Exadata machines installed worldwide. Our goal is to triple that number in FY12.” Larry Ellison, az Oracle elso embere, azt nyilatkozta, hogy mind a felho - cloud computing, mind a memória-adatbázisok területén egyre gyorsabban növekszik az Oracle:   “In FY11 Oracle’s database business experienced its fastest growth in a decade,” said Oracle CEO, Larry Ellison. “Over the past few years we added features to the Oracle database for both cloud computing and in-memory databases that led to increased database sales this past year. Lately we’ve been focused on the big business opportunity presented by Big Data.” A Big Data korszakban  megtakarításokat érhetünk el az Exadatával, tekintse meg a következo videót, de óvatosan, mert gondolkodásra késztet:    -   Oracle Exadata: Are You Ready?.

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• I'm confused about encryption and SSL

  - by ChowKiko

  while my friends and I planning to run our own website, we're confused about the encryption where hackers can TAPPING or in social engineering it's WIRE TAPPING, but I don't know how do they call it in Computers today... Well guys, I just want to know how encryption works with websites if we are using PHP+MYSQL? Is it ok to use user login ---- (PHP) encrypt inputted value then (PHP) will decrypt and validate it going to (MySQL) user login ---- (PHP) encrypt inputted value and decrypt the (MySQL) data if they are similar... Is it similar if we use $_SESSION without encryption inside PHP going to MySQL?or PHP encryption also helps the manipulation of binaries?..I'm so confused T_T... In regards to what I stated above, can a hacker hook the data if the server uses $_SESSION? Is $_SESSION safe?... IF THE HACKER CAN HOOK it? is it necessary to use SSL on our website? and why do some Merchandise websites use SSL and likewise facebook also uses SSL? what is the best suit for you if there is no SSL? encrypting the DATA using PHP going to MySQL or even without encryption while the PHP server uses $_SESSION?...

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• Swapping from NHibernate to Entity Framework &ndash; Sanity Check

  - by DesigningCode

  Now I’m not an expert in either of these techs.  I have a nice framework for unit of work / repository built with NHibernate.  Works pretty well.  I use FluentNhibernate to do the mappings.  Works well.  Takes very little code to get going with a DB back OO model. So why swap? Linq.  In Entity Framework you get much better linq support.  Visibility. I have no idea what's really happening with NHibernate….its a cloud of mystery most of the time.  You have to read all the blogs, mailing lists, etc to know what's going on. So, EF 4.0 looks like pretty good….  it has reasonably good support for mapping POCOs.  Wrapping UnitOfWork and Repository around it seems ok. Only thing I haven’t liked too much is having to explicitly load lazy loading entities. So…. am I sane?  is EF the way to go?  or is NHibernate going to suddenly release the next generation of coolness?  Is there any other major gotchas of using EF over NHibernate?

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