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• Why do I need lib64 on my 32 bit machine?

  - by Tim

  I am trying to install Oracle on my 32-bit machine that runs Ubuntu 10.4. I am following install Oracle on Ubuntu tutorial. At the very first step there is a requirement to manually install library libstdc++5. Author does 2 steps: download libstdc++5_3.3.6-17ubuntu1_amd64.deb from here download ia32-libs_2.7ubuntu6.1_amd64.deb from here As you may have probably noticed these 2 files contain an "_amd64" postfix, which pointed me out that author is using 64-bit amd processor. Each of these files author copied to /usr/lib64 and /usr/lib32 folders correspondingly and simply make soft links libstdc++.so.5 in both folders. Since I am running 32-bit machine I have simply downloaded those 2 files without "_amd64" postfix. Unexpectedly for me I have also found 2 lib folders in my /usr folder: /usr/lib64 and /usr/lib. So here is my problem: I do not understand which files and where do I have to copy: 1) Do I have to make the same steps as the author has done, i.e. download files with "_amd64" postfixes and place them in my /usr/lib64 and /usr/lib folders? 2) Or do I have to use libraries without "_amd64" postfix? And one more question: why do I have /usr/lib64 at all?

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• release management system - architectural question

  - by Sonic Soul

  Every place i've worked created their own release process, and all of them worked pretty well, however it took pretty good effort (and often a dedicated team) to manage releases. I am currently at a new place, and about to design such a system, however this time the team is very lean and we won't have dedicated resources to releasing. It will be up to development manager until the system is proofed enough for other developers to use. we're using Subversion as code repository, Team City as the build server, Jira issue tracker, Oracle db. I was thinking about writing a basic workflow app, that will let developers create a new manifest which will specify the following items. release details (who, jira issues etc) workflow step (dev, test, uat, prod approved, prod released) source files that last item is where it can get hairy. especially with database scripts. Figured I'd ask if there is a good pattern, or off the shelf product that could help with the database part, or perhaps the whole process. I briefly tested Red Gate Oracle deployment tool, but it didn't work out as well as I had hoped (from 1 day of testing at least) Questions: I think I could get around releasing of our code with something like Octopus Deploy straight from Team City. I am not clear however, how I could create a simple database deployment part, that will track which version of which script (from subversion) has been deployed where. Is there already some utility I could utilize for navigating subversion to choose which scripts should be released, instead of writing one from scratch. I'd just need it to produce some manifest of paths + versions.

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• Bash script not adding variables to session

  - by travega

  I have a bash script that I have added as a startup application. It does a bunch of exports and alias assignment. #! /bin/bash alias devhm='cd ${DEV_HOME}; ll'; alias wlhm='cd ${WL_HOME}; ll'; alias dirch='watch --interval=1 "ls -la"'; alias vols='watch --interval=1 "df -h"'; alias svn-update='svn update --depth infinity ./*'; alias mci="~/mci.sh"; alias vncserver="vncserver -geometry 1680x1050"; alias ..="cd .."; alias hist="history | grep "; export PROXY_HOST=proxy.my.setup; export PROXY_PORT=3128; export LD_LIBRARY_PATH=$LD_LIBRARY_PATH/usr/lib/oracle/12.1/client64/lib; export ORACLE_HOME=/usr/lib/oracle/12.1/client64; export TNS_ADMIN=${ORACLE_HOME}/network/admin; echo "DONE!"; But none of these values are available in my terminal sessions anymore. Even when I run the script straight into the terminal like so: ./setup.sh I see the "DONE!" prompt printed but no aliases or env variables are set. If I copy and paste the contents of the file into the terminal the aliases and env variables are set. I have tried adding a line to execute the script from .bashrc also but still no aliases or env variables set. Any ideas what might be going on here? Also could anyone suggest a better way to have these env variables/aliases added to every terminal session?

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• Knowledge Transfer without a Plan

  - by Kanini

  Hello...We are doing work for a particular client managing their CRM implementation. (The CRM itself is a product which has been largely customized to suit my client's needs). Now, they want us to manage the Oracle batch jobs/ETL as well. And for this, they are ready to provide us with Knowledge Transfer. (The Oracle batch jobs/ETL is managed in-house by the client now). After much persuasion, I got one of the Project Lead (designation-wise) to email the client asking for a KT Plan. (The Project Lead kept saying that they have never had KT plans before and all that for which I offered I will draft a template and even that was rejected!). Email from us to them - Can you please share with us the KT Plan? Response from them - Not sure what is expected from my side? The KT is planned for tomorrow from 11 am onwards where Functional knowledge of existing ETL Data migration package will be shared. How do you handle such a client? Most likely what is going to happen is this. The person who is giving the KT will say that I have given complete Knowledge Transfer and we will go back and say that "No, this was not covered. For this, they provided an overview alone and left it at that!" and so on... My Project Lead also did not respond to that email. He just said that the meeting is scheduled to happen at 11 AM (basically repeating whatever the email said and left for the day!). What could I possibly do? PS: Look for another job is a very helpful answer, but I am not looking for it. :-)

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• Visual Studio 2010 Is Here!

  - by Bill Evjen

  I think back to the days of the first versions of Visual Studio (when it was called Visual Studio .NET, remember?) and I think about how far Microsoft has come with this IDE. It really is the best IDE on the market. There is so much to this IDE it is amazing. It now can really handle managing your complete software application development lifecycle. For me, it is (besides Windows 7) the best and most successful product Microsoft has developed. You can obviously get this now and it is available on MSDN and some other places: MSDN Visual Studio Trial Editions Visual Studio 2010 Express Editions (free) You will also find great info at the Visual Studio Developer Center. Some other interesting tidbits of info: JetBrain’s ReSharper 5.0 has been released for VS2010 Oracle will have the new Oracle Dev Tools for VS2010 within one month - http://bit.ly/9gC9NE Visual Studio 64-bit - Why there is no 64-bit version of VS - http://bit.ly/dhhwAj In installing this version of Visual Studio, if you have been working on the previous RC builds, then you are going to want to uninstall these previous editions of the 2010 product. You can do this through the Add Remove Programs dialog and you are going to want to select the appropriate item from the long list of Visual Studio items. You are then going to want to step through the Visual Studio dialog (it will seem as if you are installing it again) – and you will then come to a point where you can select the option to Uninstall the entire application. If you have installed the Silverlight 4 RC stuff, then you are also going to want to uninstall this and you are also going to want to uninstall the “Update for Visual Studio 2010 (KB976272)” before installing Silverlight RC2 – which you can find on www.silverlight.net. Technorati Tags: vs2010,.net,visualstudio,microsoft

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• VirtualBox: Why are some USB devices disabled?

  - by torbengb

  Overview: My Host OS is Ubuntu 10.10 and guest OS is WinXP on the VirtualBox version downloaded from Oracle including "VirtualBox 4.0 Oracle VM VirtualBox Extension Pack" so that USB passthrough works. This works in general (I was able to back up my iPhone to iTunes in the guest OS), but some devices aren't available even though they're ptrovided in the VirtualBox settings. Specifics: In the VirtualBox settings for the guest OS, there's the part where you can select which of your USB devices should be visible to the guest OS. I've selected several devices including the iPhone. So far so good. Then an iOS upgrade came along; my iPhone is now in DFU mode (or recovery mode?) and represents itself not as "iPhone" but as "iPhone (DFU mode)". I have now also added this device to the list of USB devices that the guest OS should see -- but it doesn't see this device. Questions: Am I right in expecting that the guest OS ought to see the DFU device when I add it in the VirtualBox settings? What steps do I need to take so that the guest OS will really see the DFU device?

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• Pointer position way off in Java Application menu's when using gnome-shell

  - by Hailwood

  When using any java application in gnome-shell if the window is maximised the pointer position is way off; but only on the menu's, in the editor, or the side panel, the pointer is fine. This only presents itself when the window is maximized, and it seems that the further away from 0x0 the window is when you maximise it, the bigger the pointer offset. From what I have gathered it has to do with the window not updating it's size when it gets maximised. The other issue is that when a gnome-shell notification appears, when clicking on it, I lose the ability to type in the editor, I can select text etc, but can't give it focus to type. I must bring up some other text input (e.g. right click on a file on the left, select rename, which brings up a rename dialog) after that I can type in the editor again. So, how can I fix this? Below is as much information as I can think to provide $ gnome-shell --version GNOME Shell 3.6.1 $ java -version java version "1.7.0_09" Java(TM) SE Runtime Environment (build 1.7.0_09-b05) Java HotSpot(TM) 64-Bit Server VM (build 23.5-b02, mixed mode) $ file /etc/alternatives/java /etc/alternatives/javac /etc/alternatives/java: symbolic link to '/usr/lib/jvm/java-7-oracle/jre/bin/java' /etc/alternatives/javac: symbolic link to '/usr/lib/jvm/java-7-oracle/bin/javac'

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• Two equal items in alternatives list

  - by Red Planet

  I want to have two JDKs. The first one was installed a long time ago to /usr/lib/jvm/java-7-oracle/. I installed the second version and executed following commands to add it to alternatives: red-planet@laptop:~$ sudo update-alternatives --install "/usr/bin/java" "java" "/opt/java_1.6.0_35/bin/java" 2 update-alternatives: using /opt/java_1.6.0_35/bin/java to provide /usr/bin/java (java) in auto mode. red-planet@laptop:~$ sudo update-alternatives --install "/usr/bin/javac" "javac" "/opt/java_1.6.0_35/bin/javac" 2 update-alternatives: using /opt/java_1.6.0_35/bin/javac to provide /usr/bin/javac (javac) in auto mode. red-planet@laptop:~$ sudo update-alternatives --install "/usr/bin/javaws" "javaws" "/opt/java_1.6.0_35/bin/javaws" 2 update-alternatives: using /opt/java_1.6.0_35/bin/javaws to provide /usr/bin/javaws (javaws) in auto mode. And configured: There are 2 choices for the alternative java (providing /usr/bin/java). Selection Path Priority Status ------------------------------------------------------------ * 0 /opt/java_1.6.0_35/bin/java 2 auto mode 1 /opt/java_1.6.0_35/bin/java 2 manual mode 2 /usr/lib/jvm/java-7-oracle/bin/java 1 manual mode Press enter to keep the current choice[*], or type selection number: Why do I have two equal items in the list?

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• IASA South East Florida Chapter &ndash; November 2012 Meeting

  - by Rainer Habermann

  After a short introduction by Rainer Habermann and announcements for the chapter and promoting the upcoming IASA IFC Certification Class in January 2013 at Citrix, the audience was exited to welcome Jesus Rodriquez for the main presentation about “Mobilizing the Enterprise”.       Jesus is a co-founder and CEO of both Tellago Studios and Tellago, two fast growing start-ups with a unique vision around software technology. Jesus spends his days working on the technology and strategic vision of both companies. Under his leadership, Tellago and Tellago Studios have been recognized as an innovator in the areas of enterprise software and solutions achieving important awards like the Inc500, American Business Awards’ American and International Business Awards. A software scientist by background, Jesus is an internationally recognized speaker and author with contributions that include hundreds of articles and sessions at industry conferences. Jesus serves as an advisor to several software companies such as Microsoft and Oracle, and is the only person who holds both the Microsoft MVP and Oracle ACE awards. Jesus introduced the architecture of the Enterprise Mobile Backend as a service, integrating enterprise mobile applications with corporate line of business systems and providing robust backend capabilities represent some of the major challenges in today’s enterprise mobility solutions. The mobile consumer space has seen the emergence of backend as a service technologies as one of the main mechanisms for enabling backend capabilities in mobile applications. This session introduced the concept of mobile backend as a service (MBaaS) as the fundamental enabler of the next generation enterprise mobile applications. The session further explored the fundamental components and services of a mBaaS platform that makes it an ideal option for enabling backend capabilities in enterprise mobile applications. Using real world examples. Jesus demonstrated how mBaaS represents an agile and extremely simple model to integrate mobile applications with corporate systems. Thank you very much to Jesus Rodriquez for an outstanding presentation, Peak 10 Data Centers for hosting our meeting, and to TEK Systems for Snacks. Pictures taken by Ted Harwood.   Rainer Habermann President IASA SE Florida Chapter

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• Skillset improvement in coming new year

  - by exiter2000

  Here is a little background information. I have been working for Java 10 years. The product I am working on went to live about 3 years ago. Now, the product is getting stable. After all the post-product drama, I gained a lot of knowledge about Oracle & SQL. People(mainly management) were desperated enough to give me deep oracle-related task over DBAs. I admit I considered becoming DBA but eventually decided to remain as a programmer. DBAs & Management are demanding all the DB & Query related task back to DBA, which makes me a bit sad. In short, I anticipate a lot of time next year. What would you do to improve your skillset?? I am thinking to upgrade my Java version(Not from experience though, we are using JDK1.5) to 1.6 getting certificate. Any good idea from fellow developers?? -----------Edit --------------------- How about data modeling for application? Do you guys think it is developer role??

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• is Java free for mobile development?

  - by exTrace101

  Q1. I would like to know if it's free for a developer (I mean, if I have to pay no royalties to Sun/Oracle) to develop (Android) mobile apps in Java? After reading this snippet about use of Java field, I'm getting the impression that Java is not free for mobile development, is that right? .."General Purpose Desktop Computers and Servers" means computers, including desktop and laptop computers, or servers, used for general computing functions under end user control (such as but not specifically limited to email, general purpose Internet browsing, and office suite productivity tools). The use of Software in systems and solutions that provide dedicated functionality (other than as mentioned above) or designed for use in embedded or function-specific software applications, for example but not limited to: Software embedded in or bundled with industrial control systems, wireless mobile telephones, wireless handheld devices, netbooks, kiosks, TV/STB, Blu-ray Disc devices, telematics and network control switching equipment, printers and storage management systems, and other related systems are excluded from this definition and not licensed under this Agreement... and from http://www.excelsiorjet.com/embedded/ Notice : The Java SE Embedded technology license currently prohibits the use of Java SE in cell phones. Q2. how come these plethora of Android Java developers aren't paying Sun/Oracle a dime?

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• Java warnings on kubuntu 11.10

  - by Geo Papas

  Hello i am getting warnings after i have installed java on kubuntu 11.10. The java programs run but i always get 4 warnings: $ java Warning: no leading - on line 1 of `/usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/amd64/jvm.cfg' Warning: missing VM type on line 1 of `/usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/amd64/jvm.cfg' Warning: no leading - on line 1 of `/usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/amd64/jvm.cfg' Warning: missing VM type on line 1 of `/usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/amd64/jvm.cfg' What am i missing? Thanks in advance! the content of the file /usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/amd64/jvm.cfg is: /usr/lib/jvm/java-6-sun # # %W% %E% # # Copyright (c) 2006, Oracle and/or its affiliates. All rights reserved. # ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. # # List of JVMs that can be used as an option to java, javac, etc. # Order is important -- first in this list is the default JVM. # NOTE that this both this file and its format are UNSUPPORTED and # WILL GO AWAY in a future release. # # You may also select a JVM in an arbitrary location with the # "-XXaltjvm=<jvm_dir>" option, but that too is unsupported # and may not be available in a future release. # -server KNOWN -client IGNORE -hotspot ERROR -classic WARN -native ERROR -green ERROR

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• Advice needed on Process - Service Design

  - by user99314

  Need some advice from experts on designing a flow. Create a service that will read a csv file which may contain anywhere over 6000+ rows of individual ids as shown in the sample below. Need to read that file and go to oracle database and fetch a vname,vnumber,vid of each id in the csv and then go to document repository i.e. Oracle UCM and download all documents matching vname,vnumber,vid there can be =0 documents for each vname,vnumber,vid and save them on a file system. UCM exposes a webservice to dowload the documents. Finally create a new csv appending the filenames that are downloaded for each id. Need to keep track of any errors but need to make sure to go over the whole ids in the csv to download the documents and skip in case of errors. Need some advice on how to go about designing this as there may be over 6000+ rows in a csv file and looping it and hitting the database for each individual id and then hitting a UCM may be a bit expensive so open for any idea. How to go by designing this solution. Wondering if messaging can be helpful here or offloading process of getting the vname,vnumber,vid to pl/sql packages, creating staging tables etc. Initial csv that contains ids: **ID** 12345a 12s345 3456fr we9795 we9797 Final csv output: **ID Files Downloaded from UCM** 12345a a.pdf,b.doc,d.txt 12s345 a1.pdf,s2.pdf,f4.gif 3456fr b.xls we9795 we9797 x.doc Thanks

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• Configuration Tuning for PostgreSQL 9.1 PostGIS 1.5 Ubuntu 12.04 Server

  - by Martin

  My server performance is poor. At times SSH, top, and other features or commands are very slow to respond, taking several seconds or more. A query that normally takes 5 minutes can sometimes take 30 minutes. The database is mostly being used to do a spatial query (grid and summarize) on approximately 500GB of stored data spread between 4 tables. Restarting the server works as a temporary fix, but cannot be used as a long term solution. Any suggestions for how to diagnose and solve my performance issues? Hardware and Configuration: 3.3 GHz Intel quad core i5 16 GB DDR3 RAM 6 TB software RAID 10 (6 x 2 TB drives) Ubuntu 12.04 64-bit Postgres 9.1 PostGIS 1.5

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• SQLAuthority News – Pinal Dave: Blogger, MVP and now Interviewee by Michael J Swart

  - by pinaldave

  Michael J. Swart is a very unique person. I have often exchanged emails with him and also used a couple of his scripts in my presentations (with his permission). Every time I conduct spatial database presentation, I always start with his script where he has drawn the wonderful image of Botticelli’s Birth of Venus. I often think he is more of a creative artist than IT professional. However, if you read his blog posts and articles, they are top notch and each article is as creative as his caricatures. He is wonderful, inspiring, creative and most importantly, very humble. He recently took my interview and asked me some very interesting question. To answer his question, I had to share some of the interesting aspects of my life which I have had never shared in any interview before. He made me share the following interesting facts. Pinal Dave Caricatures Read my Interview Here are a few questions that I have answered at his blog: How I met my wife? Best moments of my life? How to pronounce my last name? Who inspired me? English as a Third Language. I am also thankful to Michael for drawing my caricature. I really liked it and I am very glad that he took time to do so. Reference: Pinal Dave (http://blog.SQLAuthority.com) Filed under: About Me, Pinal Dave, PostADay, Readers Question, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, T SQL, Technology

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• .NET 4.5 now supported with Windows Azure Web Sites

  - by ScottGu

  This week we finished rolling out .NET 4.5 to all of our Windows Azure Web Site clusters.  This means that you can now publish and run ASP.NET 4.5 based apps, and use  .NET 4.5 libraries and features (for example: async and the new spatial data-type support in EF), with Windows Azure Web Sites.  This enables a ton of really great capabilities - check out Scott Hanselman’s great post of videos that highlight a few of them. Visual Studio 2012 includes built-in publishing support to Windows Azure, which makes it really easy to publish and deploy .NET 4.5 based sites within Visual Studio (you can deploy both apps + databases).  With the Migrations feature of EF Code First you can also do incremental database schema updates as part of publishing (which enables a really slick automated deployment workflow). Each Windows Azure account is eligible to host 10 free web-sites using our free-tier.  If you don’t already have a Windows Azure account, you can sign-up for a free trial and start using them today. In the next few days we’ll also be releasing support for .NET 4.5 and Windows Server 2012 with Windows Azure Cloud Services (Web and Worker Roles) – together with some great new Azure SDK enhancements.  Keep an eye out on my blog for details about these soon. Hope this helps, Scott P.S. In addition to blogging, I am also now using Twitter for quick updates and to share links. Follow me at: twitter.com/scottgu

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• Big Data – Learning Basics of Big Data in 21 Days – Bookmark

  - by Pinal Dave

  Earlier this month I had a great time to write Bascis of Big Data series. This series received great response and lots of good comments I have received, I am going to follow up this basics series with further in-depth series in near future. Here is the consolidated blog post where you can find all the 21 days blog posts together. Bookmark this page for future reference. Big Data – Beginning Big Data – Day 1 of 21 Big Data – What is Big Data – 3 Vs of Big Data – Volume, Velocity and Variety – Day 2 of 21 Big Data – Evolution of Big Data – Day 3 of 21 Big Data – Basics of Big Data Architecture – Day 4 of 21 Big Data – Buzz Words: What is NoSQL – Day 5 of 21 Big Data – Buzz Words: What is Hadoop – Day 6 of 21 Big Data – Buzz Words: What is MapReduce – Day 7 of 21 Big Data – Buzz Words: What is HDFS – Day 8 of 21 Big Data – Buzz Words: Importance of Relational Database in Big Data World – Day 9 of 21 Big Data – Buzz Words: What is NewSQL – Day 10 of 21 Big Data – Role of Cloud Computing in Big Data – Day 11 of 21 Big Data – Operational Databases Supporting Big Data – RDBMS and NoSQL – Day 12 of 21 Big Data – Operational Databases Supporting Big Data – Key-Value Pair Databases and Document Databases – Day 13 of 21 Big Data – Operational Databases Supporting Big Data – Columnar, Graph and Spatial Database – Day 14 of 21 Big Data – Data Mining with Hive – What is Hive? – What is HiveQL (HQL)? – Day 15 of 21 Big Data – Interacting with Hadoop – What is PIG? – What is PIG Latin? – Day 16 of 21 Big Data – Interacting with Hadoop – What is Sqoop? – What is Zookeeper? – Day 17 of 21 Big Data – Basics of Big Data Analytics – Day 18 of 21 Big Data – How to become a Data Scientist and Learn Data Science? – Day 19 of 21 Big Data – Various Learning Resources – How to Start with Big Data? – Day 20 of 21 Big Data – Final Wrap and What Next – Day 21 of 21 Reference: Pinal Dave (http://blog.sqlauthority.com) Filed under: Big Data, PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, T SQL

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• .NET 4.5 agora é suportado nos Web Sites da Windows Azure

  - by Leniel Macaferi

  Nesta semana terminamos de instalar o .NET 4.5 em todos os nossos clusters que hospedam os Web Sistes da Windows Azure. Isso significa que agora você pode publicar e executar aplicações baseadas na ASP.NET 4.5, e usar as bibliotecas e recursos do .NET 4.5 (por exemplo: async e o novo suporte para dados espaciais (spatial data type no Entity Framework), com os Web Sites da Windows Azure. Isso permite uma infinidade de ótimos recursos - confira o post de Scott Hanselman com vídeos (em Inglês) que destacam alguns destes recursos. O Visual Studio 2012 inclui suporte nativo para publicar uma aplicação na Windows Azure, o que torna muito fácil publicar e implantar sites baseados no .NET 4.5 a partir do Visual Studio (você pode publicar aplicações + bancos de dados). Com o recurso de Migrações da abordagem Entity Framework Code First você também pode fazer atualizações incrementais do esquema do banco de dados, como parte do processo de publicação (o que permite um fluxo de trabalho de publicação extremamente automatizado). Cada conta da Windows Azure é elegível para hospedar até 10 web-sites gratuitamente, usando nossa camada Escalonável "Compartilhada". Se você ainda não tem uma conta da Windows Azure, você pode inscrever-se em um teste gratuito para começar a usar estes recursos hoje mesmo. Nos próximos dias, vamos também lançar o suporte para .NET 4.5 e Windows Server 2012 para os Serviços da Nuvem da Windows Azure (Web e Worker Roles) - juntamente com algumas novas e ótimas melhorias para o SDK da Windows Azure. Fique de olho no meu blog para mais informações sobre estes lançamentos em breve. Espero que ajude, - Scott PS Além do blog, eu também estou agora utilizando o Twitter para atualizações rápidas e para compartilhar links. Siga-me em: twitter.com/ScottGu Texto traduzido do post original por Leniel Macaferi.

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• storing map template in database

  - by Timigen

  I am working on an application that displays choropleth maps. These maps are of all different types, some display state by county, country by state/province, or world by country. How should I handle storing the map information in the database? My Thoughts: I won't need to do queries to find POI inside a region, so I don't think there is a need to use spatial datatypes. I am considering storing a map as a geoJSON object (I am using JS mapping library that accepts geoJSON). The only issue is what if I want a map of the US northeast. Then I would have geoJSON for the US and a separate one for the US northeast, which would be redundant. Would it make sense to have a shape database where I had each state then when I needed a map of the US I could query for each state, and when I needed a map of the US Northeast I could again query for what I need? Note: I am not concerned with storing the data for each region, just the region itself. I will query for the data on the fly for the specific region.

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• AABB Sweeping, algorithm to solve "stacking box" problem

  - by Ivo Wetzel

  I'm currently working on a simple AABB collision system and after some fiddling the sweeping of a single box vs. another and the calculation of the response velocity needed to push them apart works flawlessly. Now on to the new problem, imagine I'm having a stack of boxes which are falling towards a ground box which isn't moving: Each of these boxes has a vertical velocity for the "gravity" value, let's say this velocity is 5. Now, the result is that they all fall into each other: The reason is obvious, since all the boxes have a downward velocity of 5, this results in no collisions when calculating the relative velocity between the boxes during sweeping. Note: The red ground box here is static (always 0 velocity, can utilize spatial partitioning ), and all dynamic static collisions are resolved first, thus the fact that the boxes stop correctly at this ground box. So, this seems to be simply an issue with the order the boxes are sweept against each other. I imagine that sorting the boxes based on their x and y velocities and then sweeping these groups correctly against each other may resolve this issues. So, I'm looking for algorithms / examples on how to implement such a system. The code can be found here: https://github.com/BonsaiDen/aabb The two files which are of interest are [box/Dynamic.lua][3] and [box/Manager.lua][4]. The project is using Love2D in case you want to run it.

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• Role of systems in entity systems architecture

  - by bio595

  I've been reading a lot about entity components and systems and have thought that the idea of an entity just being an ID is quite interesting. However I don't know how this completely works with the components aspect or the systems aspect. A component is just a data object managed by some relevant system. A collision system uses some BoundsComponent together with a spatial data structure to determine if collisions have happened. All good so far, but what if multiple systems need access to the same component? Where should the data live? An input system could modify an entities BoundsComponent, but the physics system(s) need access to the same component as does some rendering system. Also, how are entities constructed? One of the advantages I've read so much about is flexibility in entity construction. Are systems intrinsically tied to a component? If I want to introduce some new component, do I also have to introduce a new system or modify an existing one? Another thing that I've read often is that the 'type' of an entity is inferred by what components it has. If my entity is just an id how can I know that my robot entity needs to be moved or rendered and thus modified by some system? Sorry for the long post (or at least it seems so from my phone screen)!

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• SQL SERVER – New Look for CodePlexProject – Hosting for Open Source Software

  - by pinaldave

  Codeplex is my favorite site. CodePlex is Microsoft’s free open source project hosting site. You can create projects to share with the world, collaborate with others on their projects, and download open source software. It is great place to find so many open source project available to explore. All the softwares are free and open source. I often go there at intervals to check what is new in SQL Server field as well on other technologies. Yesterday when I visited it, I had nice surprise as it has total makeover and looks very decent as well elegant at the same time. I have noticed that when I talk about Codeplex is user community, not everybody knows about it. The quickest way I explain what is codeplex is that I start naming few of the projects which are available there and suddenly I start noticing a few hands going up knowing the projects. This is indirect way to prove that many of us know CodePlex usability but do not pay special attention to what it is actually. Let me name a few popular projects of the CodePlex here. SQL Server Sample Database [link] Image Resizer for Windows [link] Ajax Control Toolkit [link] Skype Voice Changer [link] Silverlight Toolkit [link] Windows 7 USB/DBD Download Tool [link] Orchard Project [link] There are very interesting SQL Server projects available on Codeplex as well. I am listing few of them here for reference in listed in no particular order. SQL Server Sample Database [link] SQL Server Compact ToolBox [link] Microsoft Drivers for PHP for SQL Server [link] Internals Viewer for SQL Server [link] SQL Server Spatial Tooks [link] SQL Monitor – managing sql server performance [link] SQL Server 2008 Extended Events SSMS Addin [link] How many of above mentioned project have you come across earlier? Leave a comment it will be interesting to know what our community is familiar with. Reference: Pinal Dave (http://blog.sqlauthority.com) Filed under: PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, T SQL, Technology

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• storing data for maps database

  - by Timigen

  I am working on an application that displays choropleth maps. These maps are of all different types, some display state by county, country by state/province, or world by country. How should I handle storing the map information in the database? My Thoughts: I won't need to do queries to find POI inside a region, so I don't think there is a need to use spatial datatypes. I am considering storing a map as a geoJSON object (I am using JS mapping library that accepts geoJSON). The only issue is what if I want a map of the US northeast. Then I would have geoJSON for the US and a separate one for the US northeast, which would be redundant. Would it make sense to have a shape database where I had each state then when I needed a map of the US I could query for each state, and when I needed a map of the US Northeast I could again query for what I need? Note: I am not concerned with storing the data for each region, just the region itself. I will query for the data on the fly for the specific region.

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• SQL Server 2008 R2: These are a Few of My Favorite Things

  - by smisner

  This month's T-SQL Tuesday is hosted by Jorge Segarra (blog | twitter) who decided that we should write about our favorite new feature in SQL Server 2008 R2. The majority of my published works concentrates on Reporting Services, so the obious answer for me is about favorite new features is...Reporting Services. I can't pick just one thing in Reporting Services, so instead I thought I'd compile a list of my posts of the new features in Reporting Services 2008 R2: Map Wizard for spatial data (The World is But a Stage) Pagination features (I've Got Your Page Number) Lookup functions (Look Up, Look Down, Look All Around - Part I, Part II, Part III) Test Connection button (Testing, Testing 1-2-3) Conditional formatting based on format, i.e. RenderFormat (As You Like It) And I wrote an overview of the business intelligence features in SQL Server 2008 R2 for Microsoft Press in the free e-book, Introducing Microsoft SQL Server 2008 R2, if you're curious about what else is new in both the BI platform as well as the relational engine. Share this post: email it! | bookmark it! | digg it! | reddit! | kick it! | live it!

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• How to mange big amount users at server side?

  - by Rami

  I built a social android application in which users can see other users around them by gps location. at the beginning thing went well as i had low number of users, But now that I have increasing number of users (about 1500 +100 every day) I revealed a major problem in my design. In my Google App Engine servlet I have static HashMap that holding all the users profiles objects, currenty 1500 and this number will increase as more users register. Why I'm doing it Every user that requesting for the users around him compares his gps with other users and check if they are in his 10km radius, this happens every 5 min on average. That is why I can't get the users from db every time because GAE read/write operation quota will tare me apart. The problem with this desgin is As the number of users increased the Hashmap turns to null every 4-6 hours, I thing that this time is getting shorten but I'm not sure. I'm fixing this by reloading the users from the db every time I detect that it became null, But this causes DOS to my users for 30 sec, So I'm looking for better solution. I'm guessing that it happens because the size of the hashmap, Am I right? I have been advised to use spatial database, but that mean that I can't work with GAE any more and that mean that I need to build my big server all over again and lose my existing DB. Is there something I can do with the existing tools? Thanks.

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