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• How to distribute a unique database already in production?

  - by JVerstry

  Let's assume a successful web spring application running on a MySql or PostGre kind of database. The traffic is becoming so high and the amount of data is becoming so big that a distributed dataase solution needs to be implemented. It is a scalability issue. Let's assume this application is using Hibernate and the data access layer is cleanly separated with DAO objects. What would be the best strategy to scale this database? Does anyone have hands on experience to share? Is it possible to minimize sharding code (Shard) in the application? Ideally, one should be able to add or remove databases easily. A failback solution is welcome too. I am not looking for you could go for sharding or you could go no sql kind of answers. I am looking for deeper answers from people with experience.

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• Chart Chooser Helps You Pick the Right Chart for the Job

  - by Jason Fitzpatrick

  If you’re not sure what kind of chart would best showcase the data you’re presenting, Chart Chooser makes short work of narrowing it down. Are you trying to showcase trends? Compare the composition of sets? Show distributions and trends together? By selecting what you’re trying to highlight, Chart Chooser automatically narrows the pool of chart types to show which would effectively achieve your end. Once you’ve narrowed it down to the chart type you want, you can even download an Excel template for that chart type and populate it with your own data. Hit up the link below to take it for a spin and grab some free templates. Chart Chooser [via Flowing Data] How to Banish Duplicate Photos with VisiPic How to Make Your Laptop Choose a Wired Connection Instead of Wireless HTG Explains: What Is Two-Factor Authentication and Should I Be Using It?

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• Triple buffering causes input lag?

  - by user782220

  Consider some time in between two vsyncs. Suppose the first display buffer is being used to display the current image, and suppose the game was really fast and computed and rendered the next image to the second display buffer and the next one after that to the third display buffer. That is the rendering to the second and third display buffer happens so fast that it occurs before the next vsync. Suppose input from the user comes in now. What you would like is for the results of the input to show up on the next vsync or (probably more typical) the vsync after that. However, with the third display buffer already rendered the input can only effect the image after that. Meaning the input will only take effect at best 3 vsyncs later. I wish i had an image to show the exact timings of what I mean.

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• Optimizer Bumper Sticker Competition

  - by Maria Colgan

  For the last couple of months we have been running a competition on twitter (@SQLMaria) looking for the best Optimizer bumper sticker, which we will give away at the Optimizer demo booth at this years Oracle Open World. We got tons of excellent entries and had a tough time narrowing it down to just 5 but we have. So now we need your help to pick the final winner. Click here to vote for your favorite. Then stop by the Optimizer demo booth at Oracle Open World to claim your bumper sticker!

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• Server 2012R2 – PowerShell Web Access

  - by Waclaw Chrabaszcz

  Originally posted on: http://geekswithblogs.net/Wchrabaszcz/archive/2014/05/17/server-2012r2--powershell-web-access.aspxHaha … Sometimes I'm joking that there is nothing worse than Linux fanboi imprisoned in Windows engineer's body. Maybe someday I will start blogging about my noob's experiences. However let's stick to the point. Sometimes the easiest solutions are the best. After couple of tries how to reach left pocket using right hand I'm going to follow easy path. Today's plan is very easy, I'm going to take advantage of Server 2012 and install Web gateway to PowerShell console. After that I would be able execute PoSH from any device including Linux. Install-WindowsFeature –Name WindowsPowerShellWebAccess –IncludeManagementToolsInstall-PswaWebApplication –UseTestCertificateAdd-PswaAuthorizationRule –UserName * -ComputerName * -ConfigurationName *  Let's test it …

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• How to profile LINQ to Entities queries in your asp.net applications - part 3

  - by nikolaosk

  In this post I will continue exploring ways on how to profile database activity when using the Entity Framework as the data access layer in our applications. If you want to read the first post of the series click here . If you want to read the second post of the series click here . In this post I will use the excellent (best tool for EF profiling) which is called Entity Framework Profiler. You can download the trial - fully functional edition of this tool from here . I will use the previous example...(read more)

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• How can I link to callback functions in Lua such that the callbacks will be updated when the scripts are reloaded?

  - by Raptormeat

  I'm implementing Lua scripting in my game using LuaBind, and one of the things I'm not clear on is the logistics of reloading the scripts live ingame. Currently, using the LuaBind C++ class luabind::object, I save references to Lua callbacks directly in the classes that use them. Then I can use luabind::call_function using that object in order to call the Lua code from the C++ code. I haven't tested this yet, but my assumption is that if I reload the scripts, then all the functions will be redefined, BUT the references to the OLD functions will still exist in the form of the luabind::object held by the C++ code. I would like to be able to swap out the old for the new without manually having to manage this for every script hook in the game. How best to change this so the process works? My first thought is to not save a reference to the function directly, but maybe save the function name instead, and grab the function by name every time we want to call it. I'm looking for better ideas!

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• Load balancing on Ubuntu Server

  - by SabreWolfy

  I have Ubuntu 10.04.4 server (32-bit) installed on a headless quad-core machine with 2GB RAM. I'm running a command-line analysis which is analyzing a large amount of data, but which does not require a large amount of RAM. The tool does not provide any multi-threading, so the CPU load is sitting at 1.00 (or sometimes just a little over). I ran top and pressed 1 to see the load on each of the cores and noticed that "Cpu1" is always running at 100%. I thought that the load would be distributed between the cores, rather than loading one core all the time. I'm sure I've seen this load-balancing behaviour before in Ubuntu or Debian Desktop versions. Why would the Server edition work differently? The analysis will likely take several hours to run, so loading one core at 100% for many hours while the other 3 remain idle is surely not the best approach?

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• Flowchart for solving programming problems

  - by nurne

  I noticed that every developer implements a somewhat different flowchart for solving programming problems. By flowchart I mean a defined system of techniques that the developer goes through in a certain sequence, trying to solve the problem at hand. Some examples for techniques: Google "how to..." or "... tutorial". Search the java/msdn/apple/etc API doc for the specific class or method. Search in stack overflow the exact problem with some tags like [iphone]/[java] etc. Take a nap and let the subconscious work. Debug. Draw the algorithm or system. Google the logged error message. Ask a colleague or manager. Ask a new question in stack overflow. From your experience, what is the best flowchart for solving a programming problem?

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• Hello NHibernate! Quickstart with NHibernate (Part 1)

  - by BobPalmer

  When I first learned NHibernate, I could best describe the experience as less of a learning curve and more like a learning cliff.  A large part of that was the availability of tutorials.  In this first of a series of articles, I will be taking a crack at providing people new to NHibernate the information they need to quickly ramp up with NHibernate. For the first article, I've decided to address the gap of just giving folks enough code to get started.  No UI, no fluff - just enough to connect to a database and do some basic CRUD operations.  In future articles, I will discuss a repository pattern for NHibernate, parent-child relationships, and other more advanced topics. You can find the entire article via this Google Docs link: http://docs.google.com/Doc?docid=0AUP-rKyyUMKhZGczejdxeHZfOGMydHNqdGc0&hl=en Enjoy! -Bob

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• What''s easy extensible technique to store game data?

  - by Miro

  I'm looking for library/technique for storing my game resources - levels, object (effects,world info), items(price,effects,...), NPC(visual info, behavior), everything except graphics/audio stuff. I've seen lua used for Awesome WM configuration. protobuf looks good, but it seems to be designed for network communication. I've tried to write my own parser, but as the project grows it's more and more harder to manage it and catch all the bugs. My requiremets: stability easy extension of data without need to convert older versions to newer good(don't have to be the best) performance of loading not much coding not XML!

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• Is having a class have a handleAction(type) method bad practice?

  - by zhenka

  My web application became a little too complicated to do everything in a controller so I had to build large wrapper classes for ORM models. The possible actions a user can trigger are all similar and after a certain point I realized that the best way to go would be to just have constructor method receive action type as a parameter to take care of the small differences internally, as opposed to either passing many arguments or doing a lot of things in the controller. Is this a good practice? I can't really give details for privacy issues.

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• open source database project

  - by Jeff V

  What is the best way to build an open source database? I would like to build a database of all vehicles and the related maintenance information (i.e Oil Weight, Quantity, Tire Pressure, Windshield wipers etc). Currently this information is fragmented or just not put on line in an open way. Once collection began I would want to import into a DB and then be able to distribute freely. Is there a process (site or group) that I can start gathering this information in a reliable and verifiable way? Is there any issues that I should watch out for?

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• Is there much difference between X86 Assembly language on Windows and Linux?

  - by Logan545

  I'm a complete beginner at Assembly, and my aim is to learn as much as I can to do with Assembly to one day I can reach expert level (I know I'm way off right now, but you never know). My only problem is this: I've got two books which both teach assembly, one on a Linux and the other on Windows. They are Jeff Duntemann's Assembly Language Step By Step (the linux one) and Introduction to 80x86 Assembly Language and Computer Architecture (the windows version). If I want to get the best out of assembly, should I do this on linux and windows? Also, is the syntax the same on Windows and Linux or will I have teach my self again when learning on the other OS( which is my main concern, I want to be able to use assembly on windows and linux).

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• ASP.NET Membership - Change password without asking the old (WITH Question and Answer)

  - by djsolid

  I have received many comments and questions about how you can do what is described in this post when you site requires question and answer. The solution is definiterly not the best and should be used with EXTREME caution because in a high traffic website can cause problems but I write it down anyway. We will use reflection in order to solve our problem. And this is the code But this code changes the only instance of MembershipProvider meaning if you access somewhere else from your application the property RequiresQuestionAndAnswer until you set back it’s original value you will get false instead of true. So again be VERY careful. Hope you find it useful!

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• E-commerce + CMS: 2 sites or one?

  - by Guandalino

  Ok, let's say that a customer already has a CMS managed web site but now wants to sell goods online using an E-commerce platform (Magento in this case). My question is, does it make any difference between choosing to have just one site running both CMS and E-commerce (www.mycompany.com, or to have one site for the CMS (www.mycompany.com) and another (www.mycompany-shop.com) for E-commerce? I'd like to know the pros and cons of these approaches, so that I can advice the customer for the best. --EDIT I forgot to say that I'd prefer to have 2 separated web sites. This way I shouldn't have to learn how to integrate them together (one in Python, the other in PHP).

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• Job Search Engine Url Structure Issue [closed]

  - by Justin

  Possible Duplicate: What is the best stucture of SEO friendly URL? I am working on a job board, and i'm trying to figure out a good design for URL structure. Some things that I have found through research: 100 - 150 Chars long is ideal 3-5 words in your url, according to Matt Cutts Use .htaccess to force clean urls Do not duplicate data (important) Clean and precise, describing the content Use hyphens On the homepage, I try to detect the users location based on IP, but this isn't always accurate, and not always reliable. So until they put in their city/location, I can't always use this structure but this is potentially work-able. For Searching, a form post to a results page: domain.com/jobs/[city]/[search] ie: domain.com/jobs/toronto/sales manager/ OR domain.com/search/jobs/toronto/sales manager/ or do I remove the word JOBS and just use Search. I trying to keep good search terms in the URL, but also keep it clean and concise. Can someone give me some feedback and thoughts to 'why'...

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• Detect if square in grid is within a diamond shape

  - by myrkos

  So I have a game in which basically everything is a square inside a big grid. It's easy to check if a square is inside a box whose center is another square: *** x *o* --> x is not in o's square *** **x *o* --> x IS in o's square *** This can be done by simply subtracting the coordinates of o and x, then taking the largest coordinate of that and comparing it with the half side length. Now I want to do the same thing but check if x is in o's diamond, like so: * **x **o** --> x IS in o's diamond *** * What would be the best way to check if a square is in another square's surrounding diamond-shaped area, given the diamond's half width/height?

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• Desktop sharing options for Ubuntu 12.04 with Unity

  - by Stefan Buynov

  I would like to be able to access my office Ubuntu 12.04 machine from home, from a Mac Mini with Mac OSX. I have a VPN and I am able to access my office machine over SSH, so connectivity is not a problem. I browsed other questions, and it seems that there are several options: VNC XRDP FreeNX (haven't heard this one before) Are there any other? I have been using Remote Desktop on Windows before, and I actually like it. Not sure how well is XRDP implemented. I also used VNC several years back, and I didn't like its performance back then - not sure if things have changed since then. As I said above, the machine I want to access is running Ubuntu 12.04, with Unity. And I am using Unity by choice - I really like it and would like to continue using it :) The client computer is running Mac OSX (Snow Leopard). Based on your previous experience what is the best setup for this environment?

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• Why can't the Unity panel be hidden?

  - by newboldrob

  I am a light Linux user. I have Natty installed on my netbook and used to have it dual-booted on my Windows 7 PC. After a total refresh of my notebook off came Ubuntu and I'm back to basics over there. But HERE (I'm running Natty on a HP-Mini) I've decided to poke around a bit to get the best user experience on this little thing. I really like the Unity interface but really hate the static Unity Panel. I have no clue why it's even necessary to be on globally. After all, in the classic interface, both panels can autohide or get filed aside with buttons on either side of the bar. On a 10" screen, real estate is at a premium. What intrinsic purpose does the static unity panel hold for the OS? There has to be a great reason for this thing to HAVE to be here. It ONLY goes away in fullscreen apps and I can't use everything fullscreen Why can the unity panel not be hidden?

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• i am going to start learning to develop games, and have a very importent question

  - by levi s.

  so i am going to be starting to start learning to develop games soon, and i have already learned the basics of java. before i really go balls out. am i making a bad choice of language? should i stop now and move to c++ or c#? will that hinder me? is java going to hinder me worse? im kinda having regrets on saying "oh hey minecraft was made in java, it must be best!" im mainly asking, what should i do?

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• SFML: Monster following player on a straight line

  - by user3504658

  I've searched for this and found a few topics , usually they used a function normalize and using simple vector subtracting which is ok , but how should I do it in sfml ? Instead of using: Movement = p.position() - m.position(); p is the player and m is the monster I used something like this to move on a straight line: sf::Vector2f Tail(0,0); if((mPlayer.getPosition().y - mMonster.GetInstance().getPosition().y) >= (mPlayer.getPosition().x - mMonster.GetInstance().getPosition().x)){ //sf::Vector2f Tail(0,0); Tail.x = mPlayer.getPosition().x - mMonster.GetInstance().getPosition().x; } else if((mPlayer.getPosition().y - mMonster.GetInstance().getPosition().y) <= (mPlayer.getPosition().x - mMonster.GetInstance().getPosition().x)){ //sf::Vector2f Tail(0,0); Tail.y = mPlayer.getPosition().y - mMonster.GetInstance().getPosition().y; } if(!MonsterCollosion()) mMonster.Move(Tail * (TimePerFrame.asSeconds() * 1/2 ) ); It works ok if the the height = the width for the game window, although I think it's not the best looking game when it comes to a moving monster, since it starts fast and then it gets slower so what do you guys advise me to do ?

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• quick prototyping in project design & development

  - by lurscher

  i'm currently working on a project in my spare time (mostly 3-4 hours from monday to friday, and up to 6 hours on sundays) and i've found redmine very useful to hold a record of development tasks. However, there are some stuff, specially when you are trying to prototype or brainstorm a redesign of a set of related classes, that the best tool that i've found for this still is a sheet of paper and a pen. I want to understand if maybe i'm just short of getting to work properly with existing tools. Do you find the use of a notebook or a journal an unavoidable part of software design? are there better alternatives? how do you organize pen-and-paper work and other software management tools like redmine?

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• Registrati Subito!

  - by Claudia Caramelli-Oracle

  Lo sapevi che i regolamenti italiani limitano le aziende nell'invio di comunicazioni via e-mail senza il tuo esplicito consenso? Iscrivendoti alle comunicazioni Oracle, potrai solo ottenere benefici! Eccoti un paio di esempi:Mantieni la tua conoscenza di Oracle sempre al top:• Rimani aggiornato sulle tecnologie Oracle con le ultime informazioni e gli annunci sui nostri prodotti e servizi • Rimani aggiornato con regolari best practice di settore e report degli analisti • Ascolta direttamente il nostro management• Ricevi inviti ad eventi locali, dove ti sarà possibile incontrare specialisti Oracle e potrai ampliare la tua rete con altri clienti Controlla i tipi di informazioni che si ricevono • Gestisci i tipi di contenuti che vuoi ricevere sottoscrivendo gli argomenti basati sul ruolo, sull'industria o sul prodotto che ti interessano • Oppure potrai sempre scegliere di disiscriverti in qualsiasi momento con il nostro "one-click unsubscribe"Registrati subito per avere il tuo account Oracle qui: https://profile.oracle.com/

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• Behavior tree implementation details

  - by angryInsomniac

  I have been looking around for implementation details of behavior trees, the best descriptions I found were by Alex Champarand and some of Damian Isla's talk about AI in Halo 2 (the video of which is locked up in the GDC vault sadly). However, both descriptions fall short of helping one actually create a BT, one particular question has been bugging me for a while. When is the tree in a behavior tree evaluated? Furthermore: If the tree is in the middle of executing a sequence of actions (patrolling waypoints) and a higher priority impulse comes in (distraction sound) , how to switch to that side of the tree seamlessly without resorting to a state machine like system and if it is decided that the impulse was irrelevant (the distraction is too far away to affect this guard), how to go back to the last thing that the guard was doing ? I have quite a few questions like this and I don't wish to flood the board with separate queries so if you know of any resource where questions like these can be answered I would be very grateful.

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