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• Oracle OpenWorld 2012 Hands-on Lab: “Leading Your Everyday Application Integration Projects with Enterprise SOA”

  - by Lionel Dubreuil

  Sharpen your Oracle skill sets and master Oracle technology in Oracle OpenWorld Hands-on Labs.In self-paced, practical learning sessions covering everything from business applications to middleware, database, storage, and enterprise management solutions, you'll discover new ways to derive maximum benefits from your Oracle hardware and software solutionsOracle experts will be available in person to answer questions and guide you through each lab.Hands-on Labs fill up early, and seats are limited, so don’t be late.This  HOL10093 - Leading Your Everyday Application Integration Projects with Enterprise SOA is scheduled for: Date: Monday, Oct 1 Time: 10:45 AM - 11:45 AM Location: Marriott Marquis - Salon 5/6 In this Hands-on Lab, Experience firsthand how Oracle Enterprise Repository, Oracle Application Integration Architecture (AIA) Foundation Pack, and Oracle SOA Suite work together to help you drive your enterprisewide integration projects.From asset management, discovery, and management in Oracle Enterprise Repository to integration of content in Oracle AIA Foundation Pack operating on the Oracle SOA Suite platform, discover how you can develop integrations to support business agility.Take advantage of Oracle-delivered integration assets and validate your services for compliance, within Oracle JDeveloper. You will get your hands on the tools and talk with Oracle experts in this hands-on lab.Objectives for this session are to: Use Oracle Enterprise Repository to manage application interfaces, composite applications, and business processes See how Oracle Enterprise Repository can benefit every service-based application integration project Learn how to govern services through the software lifecycle and validate your services for compliance

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• Oracle OpenWorld 2012 Hands-on Lab: “Leading Your Everyday Application Integration Projects with Enterprise SOA”

  - by Lionel Dubreuil

  Sharpen your Oracle skill sets and master Oracle technology in Oracle OpenWorld Hands-on Labs.In self-paced, practical learning sessions covering everything from business applications to middleware, database, storage, and enterprise management solutions, you'll discover new ways to derive maximum benefits from your Oracle hardware and software solutionsOracle experts will be available in person to answer questions and guide you through each lab.Hands-on Labs fill up early, and seats are limited, so don’t be late.This  HOL10093 - Leading Your Everyday Application Integration Projects with Enterprise SOA is scheduled for: Date: Monday, Oct 1 Time: 10:45 AM - 11:45 AM Location: Marriott Marquis - Salon 5/6 In this Hands-on Lab, Experience firsthand how Oracle Enterprise Repository, Oracle Application Integration Architecture (AIA) Foundation Pack, and Oracle SOA Suite work together to help you drive your enterprisewide integration projects.From asset management, discovery, and management in Oracle Enterprise Repository to integration of content in Oracle AIA Foundation Pack operating on the Oracle SOA Suite platform, discover how you can develop integrations to support business agility.Take advantage of Oracle-delivered integration assets and validate your services for compliance, within Oracle JDeveloper. You will get your hands on the tools and talk with Oracle experts in this hands-on lab.Objectives for this session are to: Use Oracle Enterprise Repository to manage application interfaces, composite applications, and business processes See how Oracle Enterprise Repository can benefit every service-based application integration project Learn how to govern services through the software lifecycle and validate your services for compliance

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• New SPC2 benchmark- The 7420 KILLS it !!!

  - by user12620172

  This is pretty sweet. The new SPC2 benchmark came out last week, and the 7420 not only came in 2nd of ALL speed scores, but came in #1 for price per MBPS. Check out this table. The 7420 score of 10,704 makes it really fast, but that's not the best part. The price one would have to pay in order to beat it is ridiculous. You can go see for yourself at http://www.storageperformance.org/results/benchmark_results_spc2The only system on the whole page that beats it was over twice the price per MBPS. Very sweet for Oracle. So let's see, the 7420 is the fastest per $. The 7420 is the cheapest per MBPS. The 7420 has incredible, built-in features, management services, analytics, and protocols. It's extremely stable and as a cluster has no single point of failure. It won the Storage Magazine award for best NAS system this year. So how long will it be before it's the number 1 NAS system in the market? What are the biggest hurdles still stopping the widespread adoption of the ZFSSA? From what I see, it's three things: 1. Administrator's comfort level with older legacy systems. 2. Politics 3. Past issues with Oracle Support.   I see all of these issues crop up regularly. Number 1 just takes time and education. Number 3 takes time with our new, better, and growing support team. many of them came from Oracle and there were growing pains when they went from a straight software-model to having to also support hardware. Number 2 is tricky, but it's the job of the sales teams to break through the internal politics and help their clients see the value in oracle hardware systems. Benchmarks like this will help.

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• Grid Based Lighting in XNA/Monogame

  - by sm81095

  I know that questions like this have been asked many times, but I have not found one exactly like this yes. I have implemented a top-down grid based world in Monogame, and am starting on the lighting system soon. How I want to do lighting is to have a grid that is 4 times wider and higher, basically splitting each world tile into a 4x4 system of "subtiles". I would like to use a flow like system to spread light across the tiles by reducing the light by a small amount each time. This is kind of the effect I was going for: http://i.imgur.com/rv8LCxZ.png The black grid lines are the light grid, and the red lines are the actual tile grid, and the light drop-off is very exaggerated. I plan to render the world by drawing the unlit grid to a separate RenderTarget2D, then rendering the lighting grid to a separate target and overlaying the two. Basically, my questions are: What would be the algorithm for a flow style lighting system like this? Would there be a more efficient way of rendering this? How would I handle the darkening of the light with colors, reducing the RGB values in each grid, or reducing the alpha in each grid, assuming that I render the light map over the grid using blending? Even assuming the former are possible, what BlendState would I use for that?

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• XNA - 2D Rotation of an object to a selected direction

  - by lobsterhat

  I'm trying to figure out the best way of rotating an object towards the directional input of the user. I'm attempting to mimic making turns on ice skates. For instance, if the player is moving right and the input is down and left, the player should start rotating to the right a set amount each tick. I'll calculate a new vector based on current velocity and rotation and apply that to the current velocity. That should give me nice arcing turns, correct? At the moment I've got eight if/else statements for each key combination which in turn check the current rotation: // Rotate to 225 if (keyboardState.IsKeyDown(Keys.Up) && keyboardState.IsKeyDown(Keys.Left)) { // Rotate right if (rotation >= 45 || rotation < 225) { rotation += ROTATION_PER_TICK; } // Rotate left else if (rotation < 45 || rotation > 225) { rotation -= ROTATION_PER_TICK; } } This seems like a sloppy way to do this and eventually, I'll need to do this check about 10 times a tick. Any help toward a more efficient solution is appreciated.

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• A generic Re-usable C# Property Parser utility [on hold]

  - by Shyam K Pananghat

  This is about a utility i have happened to write which can parse through the properties of a data contracts at runtime using reflection. The input required is a look like XPath string. since this is using reflection, you dont have to add the reference to any of your data contracts thus making pure generic and re- usable.. you can read about this and get the full c# sourcecode here. Property-Parser-A-C-utility-to-retrieve-values-from-any-Net-Data-contracts-at-runtime Now about the doubts which i have about this utility. i am using this utility enormously i many places of my code I am using Regex repeatedly inside a recursion method. does this affect the memmory usage or GC collection badly ?do i have to dispose this manually. if yes how ?. The statements like obj.GetType().GetProperty() and obj.GetType().GetField() returns .net "object" which makes difficult or imposible to introduce generics here. Does this cause to have any overheads like boxing ? on an overall, please suggest to make this utility performance efficient and more light weight on memmory

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• Datenbank in a Box

  - by A&C Redaktion

  Die Oracle Database Appliance: ein zuverlässiges, einfach zu bedienendes und erschwingliches Datenbank-System. Endlich kommt ein Datenbanksystem auf den Markt, das auf die Bedürfnisse kleinerer Unternehmen zugeschnitten ist: Oracle Database Appliance (ODA). Nicht jeder, der große Datenmengen zu verwalten hat, kann schließlich gleich zu Exadata und Co. greifen. Die kompakte „Datenbank in a Box“ kombiniert Software, Server und Speicherkapazität und bietet diverse Vernetzungsmöglichkeiten. Sie beinhaltet zwei geclusterte SunFire-Server, die unter Oracle Linux laufen, vorinstalliert ist eine Oracle Database 11g Release 2. Einer der großen ODA-Vorteile: Die Datenbank wächst mit den Bedürfnissen des Unternehmens: Die Leistungsfähigkeit des Clusters lässt sich anpassen, indem per "Pay-as-you-grow" Software-Lizensierung sukzessive zwei bis 24 Cores freigeschaltet werden können. Sie bietet außerdem hohe Verfügbarkeit für Eigen- und Standard-OLTP sowie universelle Datenbanken, auch in großer Anzahl. Für den Schutz vor Server- und Speichersystemausfällen sorgen Oracle Real Application Clusters, beziehungsweise Oracle Automatic Storage Management. Proaktive Systemüberwachung, Software-Bereitstellung auf einen Klick, integrierte Patches über den gesamten Stack und ein automatischer Call-Home bei Hardware-Ausfällen sparen Kosten und Ressourcen bei der Instandhaltung. Über das Oracle PartnerNetzwerk steht Kunden eine große Anzahl an branchenübergreifenden und -spezifischen Anwendungen zur Verfügung, die von der besseren Verfügbarkeit der Oracle Database Appliance profitieren. Auch die Fachpresse setzt sich mit der neuen Oracle Database Appliance auseinander: Ausführlich berichten unter anderem die Computerwoche und heise online. Das Admin-Magazin bietet eine kurze aber treffende Übersicht. Eine ebenfalls anschauliche, etwas ausführlichere Darstellung bietet die Webseite von DOAG e.V. Im Webcast zur Oracle Database Appliance geht Judson Althoff unter anderem auf deren Bedeutung für das Partner-Business ein:

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• How do I uninstall GRUB?

  - by ændrük

  A hard drive that I use only for data storage still has GRUB from past Ubuntu installations. How can I remove GRUB from it without harming the rest of the drive's data? Background I occasionally move the data drive between computers with various boot order configurations, so I would like it to be non-bootable in order to avoid having to accommodate it in each computer's BIOS settings. When I power on a computer while only the data drive is attached, the following appears: error: no such device: fdf38dd4-9e9d-479d-b830-2a6989958503. grub rescue> I can confirm from old backups of /etc/fstab that this was the UUID of a root partition that I recently reformatted and which no longer exists. Here's the the data drive's partition table and raw master boot record. Please note that I'm not interested in workarounds that don't answer my primary question. I can think of several ways to work around this issue, but it bothers me on principle that I don't know how to directly resolve it. Every installation procedure should have a counterpart uninstallation procedure.

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• Dual Booting Windows 7 and Ubuntu 12.04. Partition Sizes?

  - by John F.

  I'm about to reinstall Windows, so I thought that I'd try Ubuntu out on a partition just for fun. My question is, how large should my partitions be for each of them? I know this various depending on what you use, so i'll give you a general idea of what I have, and what I have in mind. I'm currently running: Windows 7 Professional (64bit) RAM: 4GB CPU: 2.5Ghz Quad Core processor HDD: 500GB GPU: 1GB Nvidia GeForce I have around 130GB in Steam games, and some heavier applications like Photoshop CS6, Sony Vegas Pro 11. But other Applications I use are: Chrome Skype Dxtory Fraps OpenOffice BitTorrent and other assorted smaller programs. So, I was thinking that I would give my Windows partition about 150-200GB, my Ubuntu Partition around 20GB, and the rest to shared storage. I'm not really sure if I'd need more or less on Ubuntu, because I've never used it and I'm not really sure what kind of apps i'd be using over there. This would also be a clean install, so I'd be wiping my HDD, creating the Partitions in GParted, then installing Windows with Ubuntu following that. Any critique you could give me? Maybe explanations to what the /root, /boot and /home partitions I hear are about? Thanks in advanced if you actually read this lengthy thing! Any help is appreciated. (x

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• Great tools to demonstrate and showcase the ODA appliance

  - by user12842161

  Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:Calibri; mso-fareast-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} 1. Introduction to the Oracle Database Appliance Video http://www.youtube.com/watch?v=DU0hCO_-q-8 2. Oracle Database Appliance Configurator (run in standalone mode on your PC for mode) http://www.oracle.com/technetwork/server-storage/database-appliance/oracle-database-appliance-manager-1352946.zip 3. Oracle Database Appliance 3D Demo http://oracle.com.edgesuite.net/producttours/3d/databaseappliance/

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• TCO Models: Oracle invites you to the next webcast dedicated to Partners on Oracle Hardware and Solutions

  - by mseika

  The Oracle Hardware and Solutions Webcast Series is a sequence of one-hour Sales-Oriented Web Seminars, dedicated to Oracle Partners. This is your opportunity to learn about Oracle's Servers, Storage and Solutions strategy and portfolio, and their business value for you and your customers. The next appointment is for Wednesday, June 22, at 9am UKT / 10am CET:Total Cost of Ownership Models Examples: How we can sell Oracle HW and SW together, with better TCO, and benefits for both Oracle and the Partner!with Ilkka Vanhanen, Business Development Manager, Oracle EMEA Hardware Strategy Organization, who will talk about:   Concrete examples of the HW/SW TCO Model   Understand the competitive advantage provided by Oracle-on-Oracle Solutions   How Partners get new business from Oracle-on-Oracle Solutions   How Oracle is changing the game in Enterprise IT   Key benefits for both SW Resellers and HW Resellers   To register click here , then click on the “Servers and Solutions Webcasts” tab.          

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• SQL DB design to support user feeds (in application like facebook)

  - by Yoav

  I have a social network server with a MySql DB. I want to show the users feeds like done in Facebook. Example - UserX now Friend with userY, userX did like on postX etc. Currently I have table: C1 : UserId C2 : LogType (now friend, did like etc) C3 : ObjectId (Can be userId or postId) - set depending on the LogType. Currently to get all related logs to show to the user I do the following queries: 1. Get All user Friends userIds 2. Query all rows which C1 is in userIds (I query completed) 3. Scan the DB and see - if LogType equals DidLike, check if post's OwnerId is the userId - if yes add it to logs. And so on. Obvious this is not efficient at all. I am looking for a better way. I thought I had in mind: Create a new table (in addition to the Log table) C1 : UserId C2 : LogId (from Log table) C3 : UserID of the one who did the action When querying logs - look in the table and get related Logs (by LogId) from LogTable. Updating the table: Whenever user doing action that should be in the log: 1. Add the Log entry to LogTable. 2. Scan the DB and see which users are interested with the Log (Who my friends are, Who is the owner of the post) and add related entries to the new table. (must be done in BG). 3. If user UNFRIEND another user - then look in the logs for all rows where C3 == UNFRIENDED user id and delete them. Any opinions? Other suggestions?

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• Dealing with Fine-Grained Cache Entries in Coherence

  - by jpurdy

  On occasion we have seen significant memory overhead when using very small cache entries. Consider the case where there is a small key (say a synthetic key stored in a long) and a small value (perhaps a number or short string). With most backing maps, each cache entry will require an instance of Map.Entry, and in the case of a LocalCache backing map (used for expiry and eviction), there is additional metadata stored (such as last access time). Given the size of this data (usually a few dozen bytes) and the granularity of Java memory allocation (often a minimum of 32 bytes per object, depending on the specific JVM implementation), it is easily possible to end up with the case where the cache entry appears to be a couple dozen bytes but ends up occupying several hundred bytes of actual heap, resulting in anywhere from a 5x to 10x increase in stated memory requirements. In most cases, this increase applies to only a few small NamedCaches, and is inconsequential -- but in some cases it might apply to one or more very large NamedCaches, in which case it may dominate memory sizing calculations. Ultimately, the requirement is to avoid the per-entry overhead, which can be done either at the application level by grouping multiple logical entries into single cache entries, or at the backing map level, again by combining multiple entries into a smaller number of larger heap objects. At the application level, it may be possible to combine objects based on parent-child or sibling relationships (basically the same requirements that would apply to using partition affinity). If there is no natural relationship, it may still be possible to combine objects, effectively using a Coherence NamedCache as a "map of maps". This forces the application to first find a collection of objects (by performing a partial hash) and then to look within that collection for the desired object. This is most naturally implemented as a collection of entry processors to avoid pulling unnecessary data back to the client (and also to encapsulate that logic within a service layer). At the backing map level, the NIO storage option keeps keys on heap, and so has limited benefit for this situation. The Elastic Data features of Coherence naturally combine entries into larger heap objects, with the caveat that only data -- and not indexes -- can be stored in Elastic Data.

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• Separate collision mesh model?

  - by Menno Gouw

  I want to have another go at 3D within XNA. What I have seen from some other games that they just have a separate very low poly model "cage" around the environment model. However I can not find any reference to this. I have not that much experience with XNA 3D either. Is it possible to have this cage within each of my environmental models already? Lets just say I call the mesh within the .FBX wall and col_wall. How would I call to these different meshes within XNA? The player would just have a tight collision cube around. To make it a bit more efficient I will be making divide the map up by cubes and only calculate collision if the player is in it. Question two: I can't find anywhere to do cube vs mesh collision. Is there a method for this? Or perhaps it is possible to build my collision cage out of cubes in the 3D app and on loading of the models in XNA replace them directly by cubes? So I could just do box to box collision which should be very cheap and still give the player the ability to move over ledges on the static models.

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• How did we get saddled with the (hierarchical) filesystem as the basic data structure?

  - by user1936

  I'm self-taught and I don't have a CS degree. The more I've been learning about data structure, the more I wonder, in this day and age, how are we still saddled with the filesystem, with directories and files, as the basic data storage structure on the OS? I understand the simplicity of it, but it seems nowadays that there could be more options available natively. As far as I'm aware, the only project to improve the basic functionality of the filesystem was ReiserFS, where you could tell what line of a file was changed by whom, and when. For instance, if I could have native tagging for files, where I could tag images, diagrams, word-processing documents, an entire code repository, all as belonging to a single project, that would really be helpful to me. Since I'm stuck in the filesystem paradigm, I know that I could put all those into a single folder/directory, but what if they already exist in disparate directories, and they need to stay there? I know there are programs out there that can do this, but why aren't they on the filesystem? Something that would be nice to have is some kind of relational feature in the filesystem, like you get with RDBMSes. I understand that that was supposed to be part of Vista/7, but that fell off the feature list too. Sure, any program can store a binary file and have any data structure it wants in it, by why couldn't the OS offer more complex ways of storing data, beyond the simple heirarchy of the filesystem?

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• Series On Embedded Development (Part 3) - Runtime Optionality

  - by Darryl Mocek

  What is runtime optionality? Runtime optionality means writing and packaging your code in such a way that all of the features are available at runtime, but aren't loaded and used if the feature isn't used. The code is separate, and you can even remove the code to save persistent storage if you know the feature will not be used. In native programming terms, it's splitting your application into separate shared libraries so you only have to load what you're using, which means it only impacts volatile memory when enabled at runtime. All the functionality is there, but if it's not used at runtime, it's not loaded. A good example of this in Java is JVMTI, Java's Virtual Machine Tool Interface. On smaller, embedded platforms, these libraries may not be there. If the libraries are not there, there's no effect on the runtime as long as you don't try to use the JVMTI features. There is a trade-off between size/performance and flexibility here. Putting code in separate libraries means loading that code will take longer and it will typically take up more persistent space. However, if the code is rarely used, you can save volatile memory by including it in a separate library. You can also use this method in Java by putting rarely-used code into one or more separate JAR's. Loading a JAR and parsing it takes CPU cycles and volatile memory. Putting all of your application's code into a single JAR means more processing for that JAR. Consider putting rarely-used code in a separate library/JAR.

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• Does it make sense to write build scripts in C++?

  - by Klaim

  I'm using CMake to generate my projects IDE/makefiles, but I still need to call custom "scripts" to manipulate my compiled files or even generate code. In previous projects I've been using Python and it was OK, but now I'm having serious trouble managing a lot of dependencies in two very big projects I'm working on so I want to minimize the dependencies everywhere. Someone suggested to me to use C++ to write my build scripts instead of adding a language dependency just for that. The projects themeselves already use C++ so there are several advantages that I can see: to build the whole project, only a C++ compiler and CMake would be necessary, nothing else (all the other dependencies are C or C++); C++ type safety (when using modern C++) makes everything easier to get "correct"; it's also the language I know the better so I'm more at ease with it even if I'm able to write some good Python code; potential gain in execution speed (but i don't think it will really be perceptible); However, I think there might be some drawbacks and I'm not sure of the real impact as I didn't try yet: might be longer to write the code (that said I'm not sure because I'm efficient enough in C++ to write something that work quickly, so maybe for this system it wouldn't be so long to write) (compilation time shouldn't be a problem for this case); I must assume that all the text files I'll read as input are in UTF-8, I'm not sure it can be easilly checked at runtime in C++ and the language will not check it for you; libraries in C++ are harder to manage than in scripting languages; I lack experience and forsight so maybe I'm missing advantages and drawbacks. So the question is: does it make sense to use C++ for this? do you have experiences to report and do you see advantages and disadvantages that might be important?

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• Should I listen to my employer and use CASE tools?

  - by omsharp

  My employer (Not a Developer) thinks that CASE tools will help us improve our development process and documentation. I am not sure about that, we are a small team of 5 developers building mobile banking solutions for local clients. I think CASE tools will be a waste of time and money as they need to be purchased and we will need some time before we get used to them and be efficient working with them for modeling and stuff. Code generation is another issue, I really think that the CASE generated code won't be as good as code written by good developers. I think that if we stick with agile princeliness, design patterns, use TDD, and keep our code clean. we should be good. And as far as Analysis and Design, I think simple UML diagrams on whiteboard should do the trick. Documentation is good and important, but should be made as little as possible and we should not focus on Docs and forget the code. This is what i think. Am I correct? or should I listen to my employer and start researching for an appropriate CASE Tool?

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• New Certification Exam: "Oracle Database 12c: SQL Fundamentals" Released (1Z0-061)

  - by Brandye Barrington

  Oracle Certification begins testing this week for the new Oracle Database 12c Administrator Certified Associate (OCA) certification.  Testing for the Oracle Database 12c: SQL Fundamentals (1Z0-061) exam is now underway. Visit pearsonvue.com/oracle and register for exam 1Z0-061. You can get all preparation details, including exam objectives, number of questions, time allotments, and pricing on the Oracle Certification Website. Earning the Oracle Database 12c Administrator Certified Associate (OCA) credential demonstrates that you carry the foundational knowledge and skills needed to administer the Oracle Database, and sets the stage for your future progression to Oracle Database 12c Administrator Certified Professional (OCP). With Oracle Database 12c, you will experience the benefits of an Oracle Database that is re-engineered for Cloud computing. Multitenant architecture brings enterprises unprecedented hardware and software efficiencies, performance and manageability benefits, and fast and efficient Cloud provisioning. Oracle Database 12c certifications emphasize the full set of skills that DBAs need in today's competitive marketplace. Be among the first to obtain this ground breaking new Oracle Certified Associate (OCA) certification by registering for this exam today. QUICK LINKS Certification Path: Oracle Database 12c Administrator Certified Associate (OCA) Certification Exam: Oracle Database 12c: SQL Fundamentals (1Z0-061) Registration: pearsonvue.com/oracle

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• Why is quicksort better than other sorting algorithms in practice?

  - by Raphael

  This is a repost of a question on cs.SE by Janoma. Full credits and spoils to him or cs.SE. In a standard algorithms course we are taught that quicksort is O(n log n) on average and O(n²) in the worst case. At the same time, other sorting algorithms are studied which are O(n log n) in the worst case (like mergesort and heapsort), and even linear time in the best case (like bubblesort) but with some additional needs of memory. After a quick glance at some more running times it is natural to say that quicksort should not be as efficient as others. Also, consider that students learn in basic programming courses that recursion is not really good in general because it could use too much memory, etc. Therefore (and even though this is not a real argument), this gives the idea that quicksort might not be really good because it is a recursive algorithm. Why, then, does quicksort outperform other sorting algorithms in practice? Does it have to do with the structure of real-world data? Does it have to do with the way memory works in computers? I know that some memories are way faster than others, but I don't know if that's the real reason for this counter-intuitive performance (when compared to theoretical estimates).

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• Project Management Software / 1 maybe 2 developers

  - by Ominus

  I am looking for software that I can use to "manage" multiple projects (5 - 10). Here are the features I would like but any recommendation is welcome. Bug/Feature tracking on a per project basis. Some way to keep all documents, diagrams, specs, requirements, in one place with the project. Better yet a tool where all these things or most of them could be authored. Task management during the development phase with milestones and estimates/actuals. Git integration I have been doing contract work and i have been doing really well for myself as far as getting projects but its becoming VERY hard to manage everything in an efficient manner. I am trying to learn about best practices when it comes to software programming methodologies and the more I read the more i realize that I am just managing these projects poorly. I am getting things done but the more I take on the less "solid" everything is. I am afraid if I don't get some good solid tools/practices in place I am going to do my customers and myself a disservice. The problem is that there are SO many options that its hard to weed through them all. I was at a point today where I had decided that I would just code my own (there is some irony here)! Obviously everyone has their likes dislikes I would love to hear from some of you lone programmers and how you manage everything since our needs aren't exactly the same thing that a large team might need. I also want a solution that can scale to 2 maybe 3 developers if I end up hiring some people to help with my work load. Thanks again for your usual insights!

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• Trade In, Trade Up Promotion: SPARC Consolidation Now Through May 31st

  - by swalker

  Dear Partner, Installed Base Business (IBB) technology refresh is one of the most important activities for Oracle, for you and for your customers. It allows your existing customers to benefit from the most up-to-date, best-of-breed Oracle products. And it’s an exciting time to perform a technology refresh: a new SPARC promotion is available now, closing 31st May 2012. Customers trading in older SPARC systems and upgrading to a new SPARC SuperCluster T4-4 or SPARC Enterprise M8000/M9000 can get $4,000 per CPU. Discount is pre-approved and upfront (maximum discounts apply). The major highlights are as follows: Targeted Systems: Upgrade to SPARC M8000, M9000, SuperCluster Qualified installed base upgrade from: All older-generations of SPARC systemsPromotional offer: Trade-in Value: $4K per CPU Pre-approved maximum discount (including trade-in) not to exceed 60% on M8/9000 systems and 25% on SuperCluster No-cost dock-to-dock shipping, and environmentally safe disposal of the returned hardware through Oracle best-of-class recycling processes. Recommendations: We recommend you to take the following actions: As usual, please register your opportunities in OMM When you do so, please make sure you place the following Campaign Names in the “Marketing Initiative” field of OMM: Campaign Name : EMEA_Tech Refresh-IBB Campaign_12H1_Follow Up_O For all the details: Please view rules, and FAQs. For more information, please visit the Promo Partner Site here. For more information on IBB and the Oracle Upgrade Advantage Program (UAP):http://www.oracle.com/us/products/servers-storage/upgrade-advantage-program/index.html http://www.oracle.com/partners/secure/sales/oracle-ibb-program-for-partners-184291.html Contacts: For questions, please contact your favorite Oracle Partner Account Manager.

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• C++ Succinctly now available!

  - by Michael B. McLaughlin

  Over the summer I worked with SyncFusion to create an eBook based off of my C# to C++ guide for their free Succinctly Series of eBooks. Today the result, C++ Succinctly, was published for download. It is a free (registration required; they make tools and libraries for .NET development so you might get an occasional email from them – I’ve been signed up for a few months and have had maybe 3 emails total so it’s not horrible super spam or anything ) and you can download it as a PDF or a Kindle .MOBI file (or both). I’m excited with how it turned out and enjoyed working with the people at SyncFusion. The book contains a total of 20 code samples, which you can download from BitBucket (there’s a link very early in the book). Almost all of the code is also inline in the book itself so that you don’t need to worry about flipping back and forth between your dev machine and your eReader (but if you want to try to understand a concept better, you can easily download the code, open it up in VS 2012, and play around with it to see what happens when you tinker with things). The code does require Visual Studio 2012 because of its expanded support for C++11 features and since I wrote all of the samples as Console programs for clarity and compactness, you will need a version that supports C++ desktop development (currently VS 2012 Pro, Premium, or Ultimate). Sometime this Fall, Microsoft will be releasing Visual Studio 2012 Express for Windows Desktop which should provide a free way to use the samples. That said, I tested all of the samples with MinGW and only the StorageDurationSample will not compile with it due to the thread-local storage code. If you comment that out then you can compile and run all the samples with MinGW (or using a recent version of GCC in a GNU/Linux environment, or any other C++ compiler that provides the same level of C++11 support that Visual Studio 2012 does). I hope it proves helpful to those of you who choose to check it out!

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• Pair Programming, for or against? [on hold]

  - by user1037729

  I believe it has many advantages over individual programming: Pros By pairing senior with relatively junior staff, the more junior can get up to speed with both project and computing experience, and the senior will re-think the problem in order to communicate with the junior, thus re-checking his own thinking (rubber duck principle!). At least 2 people will know about any single piece of work, if one person is away the other can cover, or if some one leaves a project knowledge transfer is easier. Two brains on a complex task is more effective, communication keeps the work free flowing and provides redundancy in decision making. Code is effectively reviewed as its being written, no need for a separate reviewing phase which requires a context switch as someone who has not been working on the piece in question would be required to understand and review the related code. Reviewing code on your own which you haven't written or architected is not fun, hence counter productive. Cons Less bandwith for performing tasks, lets say we have 4 devs, pair programming requires 2 devs per task, so we would be doing 2 tasks concurrently as a posed to 4. I believe this "Con" does not stand up as the pair programmed task would complete sooner and comes with a review built in for free! Ie the pair programming task would be more efficient and thus free up resources earlier. Less flexibility to chop and change tasks as two developers are tied into a task, when flexibility is required this could be a problem.

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• Recommended formats to store bitmaps in memory?

  - by Geotarget

  I'm working with general purpose image rendering, and high-performance image processing, and so I need to know how to store bitmaps in-memory. (24bpp/32bpp, compressed/raw, etc) I'm not working with 3D graphics or DirectX / OpenGL rendering and so I don't need to use graphics card compatible bitmap formats. My questions: What is the "usual" or "normal" way to store bitmaps in memory? (in C++ engines/projects?) How to store bitmaps for high-performance algorithms, such that read/write times are the fastest? (fixed array? with/without padding? 24-bpp or 32-bpp?) How to store bitmaps for applications handling a lot of bitmap data, to minimize memory usage? (JPEG? or a faster [de]compression algorithm?) Some possible methods: Use a fixed packed 24-bpp or 32-bpp int[] array and simply access pixels using pointer access, all pixels are allocated in one continuous memory chunk (could be 1-10 MB) Use a form of "sparse" data storage so each line of the bitmap is allocated separately, reusing more memory and requiring smaller contiguous memory segments Store bitmaps in its compressed form (PNG, JPG, GIF, etc) and unpack only when its needed, reducing the amount of memory used. Delete the unpacked data if its not used for 10 secs.

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