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• Partner Webcast – Oracle Coherence Applications on WebLogic 12c Grid - 21st Nov 2013

  - by Roxana Babiciu

  Oracle Coherence is the industry leading in-memory data grid solution that enables organizations to predictably scale mission-critical applications by providing fast access to frequently used data. As data volumes and customer expectations increase, driven by the “internet of things”, social, mobile, cloud and always-connected devices, so does the need to handle more data in real-time, offload over-burdened shared data services and provide availability guarantees.The latest release of Oracle Coherence 12c comes with great improvements in ease of use, integration and RASP (Reliability, Availability, Scalability, and Performance) areas. In addition it features an innovating approach to build and deploy Coherence Application as an integral part of typical JEE Enterprise Application.Read more here

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• Using packages (gems, eggs, etc.) to create decoupled architectures

  - by Juan Carlos Coto

  The main issue Seeing the good support most modern programming platforms have for package management (think gem, npm, pip, etc), does it make sense to design an application or system be composed of internally developed packages, so as to promote and create a loosely coupled architecture? Example An example of this would be to create packages for database access, as well as for authentication and other components of the system. These, of course, use external packages as well. Then, your system imports and uses these packages - instead of including their code within its own code base. Considerations To me, it seems that this would promote code decoupling and help maintainability, almost in a Web-based-vs.-desktop-application kind of way (updates are applied almost automatically, single code base for single functionality, etc.). Does this seem like a rational and sane design concept? Is this actually used as a standard way of structuring applications today? Thanks very much!

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• Exalytics at Partners in EMEA

  - by Mike.Hallett(at)Oracle-BI&EPM

  Many partners have got Oracle Exalytics systems on their premises where they can help customers with proof-of-solution demonstrations to show how fast this engineered in-memory analytics solution can be, and how this translates into tangible business benefits.  Any customer with Oracle Analytics (OBIEE, Essbase, Hyperion Planning, Oracle BI-Applications) who is seeking to upgrade their hardware infrastructure, looking for a quick, low risk and cost effective implementation, should contact one of these to test what an Exalytics can do for them. Below is a list of some of our specialist Oracle Partners who have an Exalytics: http://www.arrowecs.fr/produits/index.php?id=82 France http://www.ise-informatik.de/ Germany http://www.hotitem.nl/ Netherlands http://bi.fors.ru/ Russia http://www.synchrotech-group.com/ Switzerland http://www.linkplus.com.tr/ Turkey http://www.rittmanmead.com/ UK

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• Permissions scheme not working

  - by ReaZem

  I am currently building a home server and I am trying to give minimal permissions to every service. I am new to permissions management and this is an awesome learning experience for me :). drwxr----- 7 reazem enter-home 4096 Sep 9 21:43 reazem drwxrws--- 3 reazem minidlna 4096 Sep 9 21:36 media reazem is my home folder and media is my media folder, it is situated directly inside my home. The minidlna user is part of the following groups : minidlna, enter-home. I get the following error: Media directory not accessible! [/home/reazem/media] I was hoping that because the minidlna user is part of the enter-home group, it could get inside the home folder, and then inside the media folder because it is in the minidlna group. Where is my mistake? Edit: I found out that chmod g+x /home/reazem solved the problem, but why? Why would you need the execute permission to get inside another directory? Thank you!

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• Retrieve data from an ASP.Net application using Ado.Net 2.0 disconnected model

  - by nikolaosk

  This is the second post in a series of posts regarding to ADO.Net 2.0. Have a look at the first post if you like. In this post I am going to investigate the "Disconnected" model. When I say "Disconnected" I mean Datasets . Datasets are in memory representations of tables in a particular database. A Dataset contains a Table collection and each Table collection contains a Row collection and each Row collection contains a Columns collection. So initially you connect to the database, get the data to...(read more)

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• Data structures for a 3D array

  - by Smallbro

  Currently I've been using a 3D array for my tiles in a 2D world but the 3D side comes in when moving down into caves and whatnot. Now this is not memory efficient and I switched over to a 2D array and can now have much larger maps. The only issue I'm having now is that it seems that my tiles cannot occupy the same space as a tile on the same z level. My current structure means that each block has its own z variable. This is what it used to look like: map.blockData[x][y][z] = new Block(); however now it works like this map.blockData[x][y] = new Block(z); I'm not sure why but if I decide to use the same space on say the floor below it wont allow me to. Does anyone have any ideas on how I can add a z-axis to my 2D array? I'm using java but I reckon the concept carries across different languages.

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• Oracle Open World 2012

  - by Eric S

  I'll be at Oracle Open World 2012 next week in San Francisco. I'm presenting in a session entitled "What’s New with Oracle VM Server for x86 and SPARC Architectures: A Technical Deep Dive", along with Adam Hawley. We'll be talking about Oracle's overall virtualization strategy, what's new with Oracle server virtualization on both x86 and SPARC, as well as an update on Oracle's virtualization management capabilities. The session runs from 11:45am to 12:45pm on Wednesday 10/3, in Moscone South - room 252. You can also find me at the Oracle VM Server for SPARC booth on Monday morning and Tuesday afternoon to showcase some pretty cool upcoming features for SPARC virtualization. And if you're there early, you might catch me at the Software Deployment with Oracle VM Templates booth on Sunday afternoon. It promises to be jam-packed and informative week!

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• How do you make a real low profile exit from your current job?

  - by Fanatic23

  This came up recently when a friend of mine left her current job. She really wanted to make a very low profile exit, but the news leaked and there really was too much noise -- some bad, some downright embarrassing not to mention management foul mouthing her. All of this, despite her contribution to the team being very substantial. So here's my question: How do you make a real low profile exit from a company? Is something like that even a reality given that a fair number of people will know you in office, not to mention your linkedin and facebook.

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• How to get out of supporting deadend sales pitches?

  - by JoseK

  As part of being a programmer, you often are asked to provide estimates/ make slideware / do technical demos for Sales teams to present to end-clients. Sometimes we go along for the 'technical' discussions or 'strategic capability planning' or some similar mumbo-jumbo. Sometimes, you kind of know which ones are totally going to fail and are not worth pursuing but the Sales guys present fake optimism and extract 'few more slides' out of you or the 'last conference call'. These don't lead to anywhere and are just a waste of time from other tasks for the week. My question is how do you get out of these situations without coming across as non-cooperative. Updated after Kate Gregory's answer: The problem is related to projects we know are doomed (from the technical feedback we've received) But Sales ain't convinced since they've just had a call higher up the management chain - so it's definitely going ahead !

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• Miss Open World? View this Roadmap Presentation

  - by PeopleTools Strategy

  If you were unable to attend Oracle Open World in September, you missed out on some important PeopleSoft messages.  Don't despair!  You now have a chance to receive an update on PeopleSoft’s presence at Oracle OpenWorld 2013 and the key messages delivered there. You can view the “PeopleSoft Update and Roadmap” webcast found here on the Quest Users Group site.  (Note: this is available with a FREE subscriber account.  Anyone can sign up here at no cost. This webcast recording presents the significant adoption and momentum behind PeopleSoft 9.2.  Viewers will also learn about the new release model for continuously delivering new capabilities to PeopleSoft customers at a lower cost enabled by the new PeopleSoft Update Manager.  There are also compelling live demonstrations of the major investment areas for PeopleSoft including a new PeopleSoft user experience enabling mobile solutions as well as In-Memory PeopleSoft applications.

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• Processing a stream. Must layers be violated?

  - by Lord Tydus

  Theoretical situation: One trillion foobars are stored in a text file (no fancy databases). Each foobar must have some business logic executed on it. A set of 1 trillion will not fit in memory so the data layer cannot return a big set to the business layer. Instead they are to be streamed in 1 foobar at a time, and have business logic execute on 1 foobar at a time. The stream must be closed when finished. In order for the stream to be closed the business layer must close the stream (a data operation detail), thus violating the separation of concerns. Is it possible to incrementally process data without violating layers?

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• Will the Global Demand for Water Outstrip the Supply by 2030?

  - by Evelyn Neumayr

  A recent study conducted by the Economist Intelligence Unit and sponsored by Oracle Utilities, titled “Water for All?”,considers the preparedness of utilities to supply water to the current global population of over 7 billion people, with a further 1 billion expected by 2030. It compares strategies used by utilities in 10 major countries to address this challenge. This study’s findings show that wide-ranging water management efforts and large-scale investments must be made if utilities are to meet near-certain water stress—demand outstripping supply—by 2030. The report is based on an online survey of 244 executives of water utilities in these countries, supplemented by in-depth interviews with 20 water utility executives and independent experts. The research concludes that utilities worldwide expect to meet future demand, despite increased supply pressure on supplies, due to improvements in water productivity that the wide range of measures utilities and governments will take to ensure that water is used more efficiently. Read more about this here.

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• Alternatives to sql like databases

  - by user613326

  Well i was wondering these days computers usually have 2GB or 4GB memory I like to use some secure client server model, and well an sql database is likely candidate. On the other hand i only have about 8000 records, who will not frequently be read or written in total they would consume less then 16 Megabyte. And it made me wonder what would be good secure options in a windows environment to store the data work with it multi-client single server model, without using SQL or mysql Would for well such a small amount of data maybe other ideas better ? Because i like to keep maintenance as simple as possible (no administrators would need to know sql maintenance, as they dont know databases in my target environment) Maybe storing in xml files or.. something else. Just wonder how others would go if ease of administration is the main goal. Oh and it should be secure to, the client server data must be a bit secure (maybe NTLM files shares https or...etc)

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• Watch out for a trailing slash on $ORACLE_HOME

  - by user12620111

  Watch out for a trailing slash on $ORACLE_HOME oracle$ export ORACLE_HOME=/u01/app/11.2.0.3/grid/ oracle$ ORACLE_SID=+ASM1 oracle$ sqlplus / as sysasm SQL*Plus: Release 11.2.0.3.0 Production on Thu Mar 29 13:04:01 2012 Copyright (c) 1982, 2011, Oracle.  All rights reserved. Connected to an idle instance. SQL> oracle$ export ORACLE_HOME=/u01/app/11.2.0.3/grid oracle$ ORACLE_SID=+ASM1 oracle$ sqlplus / as sysasm SQL*Plus: Release 11.2.0.3.0 Production on Thu Mar 29 13:04:44 2012 Copyright (c) 1982, 2011, Oracle.  All rights reserved. Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production With the Real Application Clusters and Automatic Storage Management options SQL>

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• Script to calculate the Median value for SQL Server data

  The standard SQL language has a number of aggregate functions like: SUM, MIN, MAX, AVG, but a common statistics function that SQL Server does not have is a built-in aggregate function for median. The median is the value that falls in the middle of a sorted resultset with equal parts that are smaller and equal parts that are greater. Since there is no built-in implementation for the median, the following is a simple solution I put together to find the median. Get smart with SQL Backup ProPowerful centralised management, encryption and more.SQL Backup Pro was the smartest kid at school. Discover why.

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• XBMC is slow and sluggish in Ubuntu 13.04; how can I speed it up?

  - by Dreamdealer

  I have a Zotac ZBOX ID84 with Intel D2550 proc and Nvidia GT520M GPU, 2GB memory and 320GB hard disk. I tried XBMCbuntu first and it ran perfectly for a few months until I started to mess around with the Terminal. After a re-install I could get the HDMI sound to work again so I installed the latest version of Ubuntu (13.04) instead. That worked fine. The sound and everything worked right away, but the interface of Ubuntu is sluggish and XBMC doesn't run as good as it did in XBMCbuntu. The video playback is slow and it stutters. It speeds up and slows down with the complexity of the video. So, the PC is more than capable to run XBMC and play the videos, but something in Ubuntu (GUI?) slows it down to an unusable pace. Can anybody tell me what I can do to speed things up? Since I'm new to Ubuntu I have no clue where to start looking.

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• What are the caveats of the event system built on Messenger rather than on classic .NET events?

  - by voroninp

  MVVM Light and PRISM offer messenger to implement event system. the approximate interface looks like the following one: interface Messanger { void Subscribe<TMessageParam>(Action<TMessageParam> action); void Unsubscribe<TMessageParam>(Action<TMessageParam> action); void Unsubscribe<TMessageParam>(objec actionOwner); void Notify<TMessageParam>(TMessageParam param); } Now this model seems beneficial comparing to classic .net events. It works well with Dependency Injection. Actions are stored as weak references so memory leaks are avioded and unsubscribe is not a must. The only annoyance is the need to declare new TMessageParam for each specific message. But everything comes at a cost. And what I'm really worried about is that I see no shortcomings of this approach. Has anoyne the experience of some troubles with this design pattern?

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• How do I add Different Screens to my C#/XNA Game?

  - by Ramses Brown

  I'm working on a Pong clone in XNA. Gameplay-wise, I have it where I want it to be. I want to add a title screen and some other screens to it like a menu, as well as a screen for the Winning/Losing results. I've tried the Game State Management Example on the App Hub site, but It's very complicated and I haven't been able to make sense of it. Is there a simpler way? I'm hoping for a solution that can be used in other projects too. Plus I'd like to know how to actually create menu items (basically, how do I display the different options on it, and highlight them, etc).

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• Given two sets of DNA, what does it take to computationally "grow" that person from a fertilised egg and see what they become? [closed]

  - by Nicholas Hill

  My question is essentially entirely in the title, but let me add some points to prevent some "why on earth would you want to do that" sort of answers: This is more of a mind experiment than an attempt to implement real software. For fun. Don't worry about computational speed or the number of available memory bytes. Computers get faster and better all of the time. Imagine we have two data files: Mother.dna and Father.dna. What else would be required? (Bonus point for someone who tells me approx how many GB each file will be, and if the size of the files are exactly the same number of bytes for everyone alive on Earth!) There would ideally need to be a way to see what the egg becomes as it becomes a human adult. If you fancy, feel free to outline the design. I am initially thinking that there'd need to be some sort of volumetric voxel-based 3D environment for simulation purposes.

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• Cloud Migration Lifecycle

  - by llaszews

  The first step in migrating to the cloud is the set up phase. This phase includes: 1. Plan Cloud Setup - Create a project plan. 2. Set up infrastructure - The IaaS and PaaS environments need to be installed and configured. This includes databases, network, hardware, disk and application servers. 3. Set up shared components - Are applications, database objects or other components going to be made accessible in the cloud ? These shared components need to be configured and made accessible. 4. Set up self-service portal - Customer self service provisioning, management and monitoring.

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• Where can I learn to write my own database?

  - by Buttons840

  I'm interested in writing my own database - a triple-store. Are there any good resources to help with the challenges of such a project? Or more generally: How can I learn to write my own database? Some specific issues I'm unsure of: How is the data actually stored on the file-system? A flat-file seems easy enough, but a database is a lot more then a flat-file. What kinds of things are typically stored (or cached) in memory? How are indexes created and stored? How is ACID compliance achieved? Etc. This is a big topic, but knowing how to store large amounts of data in a reliable way is good to know. (My investigation into existing triple-stores was summarized back in 2008; not much has changed in 4 years it seems. This is why I want write my own.)

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• Visual Basic 2010 is here!

  It was a very exciting time this week, with the launch of Visual Studio 2010 and .NET 4. On April 12th, 5 launch events took place around the world in Beijing, Kuala Lumpur, Bangalore, London and Las Vegas. The video from Bob Muglias VS 2010 Launch keynote is now available on-demand. The agenda for day was VS 2010 sessions, including Windows Development, SharePoint and Office, Dev & Test Collaboration, and Project Management. Follow the Visual Studio 2010 Launch tag on Channel9 for more There...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• New perspectives in a SPARC/virtualization/cloud session at the Oracle OpenWorld

  - by Karoly Vegh

  Attending Oracle OpenWorld? You definitely should.  If you do, come see me at the "Breakthrough in Private Cloud Management on SPARC T-Series Servers" session on Wednesday at 11:45 in Moscone South 270, the right session to get the consolidation discussion running at lunch :)  I am of course going to talk about Oracle VM for SPARC (former LDoms), the performance overhead impact of virtualization, the importance of data security in the cloud, instance separation and the open potentials of verified platform and cost savings.  For more details:  https://oracleus.activeevents.com/connect/sessionDetail.ww?SESSION_ID=2590 See you there! 

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• Master Data and Data Quality - Do You Really Know Your Customer?

  - by Mala Narasimharajan

  How well do you know your customer?   Data Quality and MDM go hand-in-hand when it comes to fully knowing your customers and information related to the Take a look at this video and see why customer data needs a consolidated management strategy that incorporates data quality.  Oracle MDM, specifically Oracle Customer Hub enables enterprises to truly understand their customers and ensure a single, trusted view for any customer.  It offers the most complete MDM application suite in the marketplace.  For more information on Oracle MDM and Oracle Enterprise Data Quality visit us on the web.  

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• Good message board for a website (e.g. phpBB)

  - by unixman83

  Hi, What are the best (and most widely used) Linux-based message board softwares, and the pros and cons of each. e.g. Security Vulnerabilities, Performance on a cheap server, comes pre-packaged [RPM or DEB]. I am looking for the best message board software for my website. A VPS can run almost any software, so the sky is the limit! Free, doesn't require unreasonable number of hyperlinks to their website Security focused / Widely Used, vulnerabilities are found and fixed quick Easy to keep up-to-date, i.e. prepackaged / auto-update in some way Moderator features [like pinning / message preamble], account management Themeable, customize appearance a bit

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