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  • Azure Futures - Distributed Computing and Number Crunching

    - by JoshReuben
    "the biggest Azure customers today are the ones using HPC on-premises at the current time" - http://www.zdnet.com/blog/microsoft/windows-azure-futures-turning-the-cloud-into-a-supercomputer/8592?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+zdnet%2Fmicrosoft+%28ZDNet+All+About+Microsoft%29&utm_content=Google+Reader   Orleans Framework for cloud computing - http://research.microsoft.com/en-us/projects/orleans     HPC on Azure - http://www.zdnet.com/blog/microsoft/microsoft-finalizes-its-latest-supercomputing-operating-system-release/7414   Dryad is Microsoft’s competitor to Google MapReduce and Apache Hadoop  - http://www.zdnet.com/blog/microsoft/microsoft-takes-a-step-toward-commercializing-its-dryad-distributed-computing-technologies/8255?tag=mantle_skin;content   SQL Server Analysis Services DataMining in the cloud - http://www.sqlmag.com/article/reporting2/azure-data-mining-in-the-cloud.aspx

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  • CPU Usage in Very Large Coherence Clusters

    - by jpurdy
    When sizing Coherence installations, one of the complicating factors is that these installations (by their very nature) tend to be application-specific, with some being large, memory-intensive caches, with others acting as I/O-intensive transaction-processing platforms, and still others performing CPU-intensive calculations across the data grid. Regardless of the primary resource requirements, Coherence sizing calculations are inherently empirical, in that there are so many permutations that a simple spreadsheet approach to sizing is rarely optimal (though it can provide a good starting estimate). So we typically recommend measuring actual resource usage (primarily CPU cycles, network bandwidth and memory) at a given load, and then extrapolating from those measurements. Of course there may be multiple types of load, and these may have varying degrees of correlation -- for example, an increased request rate may drive up the number of objects "pinned" in memory at any point, but the increase may be less than linear if those objects are naturally shared by concurrent requests. But for most reasonably-designed applications, a linear resource model will be reasonably accurate for most levels of scale. However, at extreme scale, sizing becomes a bit more complicated as certain cluster management operations -- while very infrequent -- become increasingly critical. This is because certain operations do not naturally tend to scale out. In a small cluster, sizing is primarily driven by the request rate, required cache size, or other application-driven metrics. In larger clusters (e.g. those with hundreds of cluster members), certain infrastructure tasks become intensive, in particular those related to members joining and leaving the cluster, such as introducing new cluster members to the rest of the cluster, or publishing the location of partitions during rebalancing. These tasks have a strong tendency to require all updates to be routed via a single member for the sake of cluster stability and data integrity. Fortunately that member is dynamically assigned in Coherence, so it is not a single point of failure, but it may still become a single point of bottleneck (until the cluster finishes its reconfiguration, at which point this member will have a similar load to the rest of the members). The most common cause of scaling issues in large clusters is disabling multicast (by configuring well-known addresses, aka WKA). This obviously impacts network usage, but it also has a large impact on CPU usage, primarily since the senior member must directly communicate certain messages with every other cluster member, and this communication requires significant CPU time. In particular, the need to notify the rest of the cluster about membership changes and corresponding partition reassignments adds stress to the senior member. Given that portions of the network stack may tend to be single-threaded (both in Coherence and the underlying OS), this may be even more problematic on servers with poor single-threaded performance. As a result of this, some extremely large clusters may be configured with a smaller number of partitions than ideal. This results in the size of each partition being increased. When a cache server fails, the other servers will use their fractional backups to recover the state of that server (and take over responsibility for their backed-up portion of that state). The finest granularity of this recovery is a single partition, and the single service thread can not accept new requests during this recovery. Ordinarily, recovery is practically instantaneous (it is roughly equivalent to the time required to iterate over a set of backup backing map entries and move them to the primary backing map in the same JVM). But certain factors can increase this duration drastically (to several seconds): large partitions, sufficiently slow single-threaded CPU performance, many or expensive indexes to rebuild, etc. The solution of course is to mitigate each of those factors but in many cases this may be challenging. Larger clusters also lead to the temptation to place more load on the available hardware resources, spreading CPU resources thin. As an example, while we've long been aware of how garbage collection can cause significant pauses, it usually isn't viewed as a major consumer of CPU (in terms of overall system throughput). Typically, the use of a concurrent collector allows greater responsiveness by minimizing pause times, at the cost of reducing system throughput. However, at a recent engagement, we were forced to turn off the concurrent collector and use a traditional parallel "stop the world" collector to reduce CPU usage to an acceptable level. In summary, there are some less obvious factors that may result in excessive CPU consumption in a larger cluster, so it is even more critical to test at full scale, even though allocating sufficient hardware may often be much more difficult for these large clusters.

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  • One-way platforms in UDK

    - by Jordaan Mylonas
    I'm looking to make a multi-player platforming game using UDK. I'm currently doing feasibility research, to make sure I will reasonably be able to do all of the technical things I want to do. The first major hurdle I've come across without being able to find as answer, are one-way platforms. That is to say, platforms through which a player can jump up, but not fall through (unless they choose to). These are commonly seen in games like Mario, Kirby and Smash Bros. Does anyone know how such a system would work within UDK? I can think of solutions that might work for single-player, but not multi.

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  • Which features of user story management should an agile team look for?

    - by Sonja Dimitrijevic
    In my research study, I need to identify the key features of user story management tools that can be used to support agile development. So far, I identified the following general groups of features: User role modeling and personas support, User stories and epics management, Acceptance testing support, High-level release planning, Low-level iteration planning, and Progress tracking. Each group contains some specific features, e.g., support for story points, writing of acceptance tests, etc. Which features of user story management should an agile team look for especially when switching from tangible tools (index cards, pin boards and big visible charts) to a software tool? Are some features more important than the others? Many thanks in advance!

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  • What do developers want to learn at their next startup?

    - by William Pietri
    As a developer, i know how much I like learning new stuff. Now that I'm hiring developers for my startup, I know I can't compete with Google's zillion-dollar bonuses and fancy cafeterias, but we are rich with opportunities for curious people to learn. I want to set things up to support that. So if you're a developer likely to join a startup, what do you want to learn? Product things? Business things? User research, design, or tech ops things? Or if it's more technical learning you're after, do you want to go deeper in what you know (e.g., back end learning back end) or cross-train (e.g., front end learning back end)? Or is there something else entirely?

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  • web services, J2EE, spring, DB integration project ideas- maybe data mining related?

    - by sj88
    Hey guys, I am a graduate CS student (Data mining and machine learning) and have a good exposure to core JAVA (3 years). I have read up a bunch of stuff on Design patterns J2EE Web services( soap and rest) spring and hibernate Java Concurrency - advanced features like Task and Executors. I would now like to do a project combining this stuff (over my free time of corse) to get a better understanding of these things and to kind of make an end to end software (to learn the best design principles etc + svn, maven). Any good project ideas would be really appreciated. I just wanna build this stuff to learn so I dont really mind re-inventing the wheel. Also, anything related to data mining would be an added bonus (fits with my research) but absolutly not necesary (since this project is more to learn to do large scale software developement)

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  • 2D XNA Game Engine with a Good Wiki [closed]

    - by gcx
    I'm a newbie game developer. I'm planning to develop a XBOX (with a Kinect to double the fun) game. I've researched some 2D game engines that i can use in my project. After some research I've found IceCream engine and it looks delicious with its Milkshake editor. But I can't seem to find "working" game source examples for that engine and its own website's tutorial is not very sufficent. (If you are familiar with this engine) do you know any community that has helpful resources for this particular engine? If not, which engines do you recommend (that has a great wiki) for a XNA based XBOX - Kinect game?

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  • How can a load and play an .x model using vertex animation in XNA?

    - by Christian
    From a game I developed years ago, I still have character models that my former 3D engine designer created and that I'd like to reuse in a Windows Phone project now. However, the files are in DirectX format (.x) containing keyframe animation only. No bones. No skeleton. There are a lot of animation keys defined on several frames to animate the characters. I don't quite understand how that works, to be frankly. However, I did a lot of research regarding a possible way of getting the characters animated via XNA on Windows Phone and all I found are hints that it is generally possible but not supported. Possibly by implementing own Content Importers and Processors. I didn't find anyone who successfully did something like that yet. How should I go about loading and displaying these models in XNA?

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  • Webcast - C-level Perspectives on How HR Can Take on a Bigger Role in Strategic Planning

    - by Scott Ewart
    The Economist Intelligence Unit (EIU), on behalf of IBM and Oracle, recently surveyed a number of C-level executives in North America and Western Europe to understand how HR can take on a bigger role in driving growth. The resulting reports highlight the actions senior HR leaders can take to place themselves at the heart of the debate on a company's strategic direction.In this session, IBM and Oracle HCM specialists will review the findings of the EIU research reports and provide guidance on how technology innovation can help to align talent strategies with long term business goals. Participants will gain an understanding of the following: Results of the Economist Intelligence Unit study around "Executive Perceptions of the HR Function" Differences in perspective between CEOs and CFOs Identify how the HR professional can take a bigger role in driving business growth Join us on Thursday, October 25 for a live webcast. Speakers:Gina Wells Global Oracle HCM LeaderIBM Global Business Services Michelle NewellSenior Director, HCM Applications MarketingOracle Register Here For the Webcast on Thursday, October 25.

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  • How can I implement an escrow payment system in my website?

    - by BeachRunnerJoe
    Hello. I'd like to build a web service similar to kickstarter that allows users to pledge money to an idea, tho I'm unsure how I can implement this kind of payment system. If the the idea receives a specified amount of money, then the donors are charged. If it doesn't, the donors are not charged. I've done some preliminary research and have found Amazon Payments to be a possible solution provider for this, but I'm still unsure where to start with this and was hoping someone could point me in some right directions for how I can go about implementing this kind of payment structure in my web site. I should also note that this is primarily a prototype I'm building, so it's ok if the solution is limited to U.S. customers only. Also, I plan to build the site using Ruby on Rails. Thanks so much for your wisdom!

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  • The answer to the unfathomable question: what is meaning of error value 2147943645?

    - by Jim Lahman
    I scheduled a task to perform a windows backup of a single disk on the my server.  When I tested it, the task ran successfully – no problems, no errors; just as I expected.    However, when the task ran as scheduled, it failed with error value 2147943645.  I wondered was this the answer to life, the universe and everything in it?  No.  That is 42.    After doing some research and reviewing the task configuration, I realize that the task will only run if the user of logged on:   So, this was the answer!!  I have to configure the task to run whether the user is logged or not.  Or, else I’ll get that nasty error value.

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  • The updated Survey pattern for Power Pivot and Tabular #powerpivot #tabular #ssas #dax

    - by Marco Russo (SQLBI)
    One of the first models I created for the many-to-many revolution white paper was the Survey one. At the time, it was in Analysis Services Multidimensional, and then we implemented it in Analysis Services Tabular and in Power Pivot, using the DAX language. I recently reviewed the data model and published it in the Survey article on DAX Patterns site. The Survey pattern is the foundation for others, such as the Basket Analysis, and it is widely used in many different business scenario. I was particularly happy to know it has been using to perform data analysis for cancer research! In this article I did some maintenance on the DAX formulas, checking that the proper error handling is part of the formulas, and highlighting some differences in slicers behavior between Excel 2010 and Excel 2013, which could be particularly important for the Survey scenario. As usual, we provide sample workbooks for both Excel 2010 and Excel 2013, and we use DAX Formatter to make the DAX code easier to read. Any feedback will be appreciated!

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  • Enzo Backup for SQL Azure Beta Released!

    - by ScottKlein
    Blue Syntax is happy to announce the release of their SQL Azure database backup product! Enzo Backup for SQL Azure offers unparalleled backup and restored functionlity and flexibility of a SQL Azure database. You can download the beta release here: http://www.bluesyntax.net/backup.aspx With Enzo Backup for SQL Azure, you can: Create a backup blob, or a backup file from a SQL Azure database Restore a SQL Azure database from a backup blob, or a backup file Perform limited backup and restore of SQL Server databases (see details) Run backups entirely in the cloud using a remote agent Backup a single schema of a database Restore specific tables only Copy backup devices from on-premise to the cloud Use a command-line utility to perform backup operations Perform transactionally consistent backups for SQL Azure Please download it and provide us your feed back!

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  • Suggestions for Future or On-The-Edge Languages (2011)

    - by Kurtis
    I'm just looking for some suggestions on newer languages and language implementations that are useful for string manipulation. It's now 2011 and a lot has changed over the years. Most of my work includes web development (which is mostly text-based) and command line scripting. I'm pretty language agnostic, although I've felt violated using PHP over the years. My only requirements are that the language be good at text manipulation, without a lot of 3rd party libraries (core libraries are okay, though), and that the language and/or standard implementation is very up to date or even "futuristic". For example, the two main languages I'm looking at right now are Python (Version 3.x) or Perl (Version 6.x). Research, Academic, and Experimental languages are okay with me. I don't mind functional languages although I'd like to have the option of programming in a procedural or even object oriented manner. Thanks!

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  • What would the ultimate developer training class look like?

    - by user652273
    I think today's typical/traditional 3-5 days developer training classes aren't so great, as you tend to forget half of it shortly after. It's too much one way communication and not enough interaction. Also brain research has shown that this kind of setup is usually not optimal for efficient learning. For clarification, I am referring to professional, commercial, paid classes. However this could also be applied for any kind of studies. How could the ultimate developer training package be setup to really make sure you learn what you are supposed to learn? Would that be more: Multimedia? Exercises? Homeworks? Spread out over time instead of 3-5 compact days? Group projects?

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  • CS, SE, HCI, Information Science, Please recommendation for further education of the former performing art manager seeking career in IT industries? [on hold]

    - by Baek Seungjoo
    IT specialists there J Thank you very much for your collective efforts here, and I got huge help reading your professional comments and advices on each questions I have searched so far! This time, I would like to ask for your practical advices or recommendation on what I am struggling on at this moment. I am currently seeking higher education for my career transition from performing art manager and director to “IT software and/or service development and management specialist”. However, as this field is quite new to me, and there are lots of different work positions, I have no idea which grad major I better pursue in order to get qualification. Of course I know this question could sounds wired as it is kind of personal choice. But my lack of understanding on how IT software companies work in general, your practical and experience-based advice will be great help to me, who spent more than two months of self-research on net. OK. Before my question, here is my plan and history, which are quite different from those currently in IT industry I think… 1) Target Firstly, get career transition into IT service or products companies and get experiences. Eventually, pursue IT entrepreneurship in combination with my arts and cultural production and business expertise. 2) Background Career: performing arts director and manager in theatre-based scale opera and musical Art education in youth BA in literature and Chinese studies (Art & Humanities) MA in Cultural & Creative Industries (Art & Humanities) – dissertation with focus on digital prosumption and the lived experience of the prosumer. (a qualitative research on the agents in the digital world) 2) Personally Huge interest in IT hardware and software, and their trend. Skills to build up, repair, tune PCs -of course this is no more than personal hobby, but shows my interests in this field. 4) Problem Encounter a question “So, what do you think you can contribute practically in this position”. This question turn me down everytime I go through job interviews, and I decided more education in the relevant area. Here are my questions. 1) In terms of work positions in IT software companies, I wonder if I can put the comparison of what “Artists” is to “Arts Manager or Director” is what “Developer” is to “Product Manager”. (Of course, this stereotypical division of Artist-Art Manager is out of sense because the domain overlaps to some extent, and is blurring at least in my field, and they are in different contexts, but just speaking easily.) Normally, artist comes with special arts educations, and they live in their own world of artistic inspiration and creation, and they feel alive in practice and on stages. Meanwhile, from the point of staging and managing productions, the role of art manager is critical as well. Our role cares how the production appeals to the audience in effective way, how to make profit and future sustainable management through that, how to set up future strategy in consideration of the external conditions such as political and social circumstances, audience trend and level, other production trends from on-going and historical perspectives, how and what the production make voice to the society from political, economic, humanitarian stances. So, we need keen eyes on economic, political, and societal environment, have to understand human-being and their desires, must know how to make presentation and attract investors, must have sense in managing and fighting over the limited financial resource, how to extend networking and so on. It is common that the two agents create productions in collaboration (normally not in that ideal way but in conflict and fight though J ). So, we need to know each other’s expertise to some extent, for better production. What are the work positions in IT software industries equivalent to the role of “art manager” in performing arts? From my view, considering developers come with special education in the world of computer science, software engineering, or others (self-education sometimes), and they express themselves with the arts of coding, computer languages on the black screen, and make sort of their artistic production online to the audience, I guess there might be someone who collaborate with developers in creating, managing, and launching IT services or products. 2) Which education among CS, SE, HCI, Information Science, is needed for those seeking such work position? Especially for person like me. (At this moment, Information Science has the highest possibility to get in, since I lack Calculus and Math in undergrad educaiton. But please let me know irrespective of this concern, I think there are ways to back it up if CS or SE education needed in my case) 3) Which field between Information Science and HCI can be more practical background regarding job hungting? And which of them have more demands in job market? AS I checked, HCI is more close to CS than IS in its focus of study area. Thank you very much for your patience reading such a long inquiry, and I appreciate to your efforts in advance. Have a nice day in this beautiful summer.

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  • What is the increase in developer productivity while using Hibernate?

    - by Tarun Kohli
    I was curious to find out the percentage increase in developer's productivity by using Hibernate. We use both Hibernate and NHibernate extensively and find them to be extremely elegant frameworks but haven't undertaken any study to find out the time savings by using them. IMHO, one could get a good 30 to 40% jump in developer productivity as one doesn't have to write the basic CRUD operations and bother about caching. But, are there are any formal case studies which prove that point? I would really appreciate if someone could direct me to a published white paper about some statistics about the productivity gains.

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  • PEX - are you licenced for it?

    - by TATWORTH
    There is an interesting artcile about PEX at http://blogs.msdn.com/b/ukmsdn/archive/2011/02/22/featured-article-pex-and-visual-studio.aspx PEX can be downloaded from http://research.microsoft.com/en-us/projects/pex/downloads.aspx The licence conditions are: "Pex and Moles are Power Tools available for commercial use for MSDN subscribers. Moles is also available separately for commercial use without requiring an MSDN subscription. Pex and Moles are also available for academic and non-commercial use." I note with interest that it is now available to MSDN subscribers. If I recall correctly it used to be only available to VS Team versions.

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  • What parameters to use to compare GUI frameworks / toolkits?

    - by gooli
    I'm doing some research on the best GUI toolkit to use for future products at the company. We're talking about a fairly large organizations with quite a bit of code and a complete rewrite project in planning. Don't ask. Anyway, I'm trying to create a list relevant parameters to judge the toolkits. What would you use to drive the comparison? Here's what I've got so far: Maturity Ease of development Ease of prototyping Ease of maintenance Size of hiring pool Available knowledge at the company Training costs Community size Community level of expertise (how hard to find good answers to complex problems) Amount of expert-level books available Ability to interface to other technologies Deployment considerations Visual aesthetics Ability to access OS resources Multiple monitor support (something that might come in handy in our particular application)

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  • Free Webinar: Filling the Gap in SharePoint Records Management

    - by CatherineRussell
    Webinar: Filling the Gap in SharePoint Records Management Find out how you can solve your challenges with conceptClassifier for SharePoint and leverage SharePoint 2007 and 2010 in this free one hour webinar. This informative webinar will focus on records management in SharePoint and how Concept Searching’s award winning conceptClassifier for SharePoint automatically generates conceptual and descriptor metadata from documents, automatically changes the Content Type, and automatically declares records. Juan J. Celaya, President and CEO of COMPU-DATA International, LLC will share his expertise and experience using the U.S. Army’s Joint Services Records Research Center (JSRRC) as a case study and illustrates how they solved the challenge of processing millions of records to support veteran’s claims using conceptClassifier.    Webinar is on June 23rd from 11:30am – 12:30pm EST and explore real world examples of how to simplify your Records Management processes in SharePoint: http://www.clicktoattend.com/?id=149003

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  • Dual monitor setup with Intel graphics and Nvidia Geforce GT 425M on 12.04

    - by fo_x86
    I have a Dell XPS L401x and just installed 12.04. I have a mini-display and an HDMI output, and I could hook up two Dell UltraSharp monitors to each port on Windows 7, and get a triple monitor setup. Doing a bit of research, it seems like the mini-display is wired to the integrated graphics card whereas HDMI is hooked up to Nvidia graphics card. I've also installed Bumblebee as it seemed like that was the proper way of installing Nvidia drivers on Ubuntu. At the moment none of my monitors is being recognized by Ubuntu. Is it even possible to have a triple monitor (laptop display + 2 external) setup? Has anyone successfully done this?

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  • Test driven development - convince me!

    - by Casebash
    I know some people are massive proponents of test driven development. I have used unit tests in the past, but only to test operations that can be tested easily or which I believe will quite possibly be correct. Complete or near complete code coverage sounds like it would take a lot of time. What projects do you use test-driven development for? Do you only use it for projects above a certain size? Should I be using it or not? Convince me!

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  • Is it best to try to work at a company where your software directly makes the company money?

    - by Ryan Hayes
    I was told once that the best place to work as a developer is a company where the software you write is what makes the company money, whether it be software production or software services like consulting. This is opposed to a company where the software you write is just to support some other part of the business that makes the money, like manufacturing or finance. I know there are always exceptions, but in general, are employees treated better if they are on the front lines of profit generation, as opposed to being just another cost center? cost center (n.) - A cost center is part of an organization that does not produce direct profit and adds to the cost of running a company. Examples of cost centers include research and development departments, marketing departments, help desks and customer service/contact centers.

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  • FFmpeg & Installation on phpmyadmin

    - by Vivek
    I am attempting to have an interface in which people can upload music files and listen to them through the site. The biggest problem obviously is that someone who uploads an audio track in mp3 format into Mozilla wouldn't be able to play it back (since MF doesn't support mp3 playback since I'm using jPlayer). I did some research and found out that I could use command line php using FFmpeg to convert the mp3 to ogg or some other supportable format. I believe I understand (a little bit) how command line php works but I was wondering how I could install it onto phpmyadmin on my hosting service? Could anyone link me to a tutorial or care to explain? I tried googling it but I just couldn't find it.

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  • Language-independent sources on collision detection

    - by Phazyck
    While making a Pong clone with a friend, we had to implement some collision detection. For research purposes, my friend dug up a book called "AdvancED Game Design with Flash" by Rex Van Der Spuy. This book was clearly targeted at implementing collision detection in ActionScript, and I also have some problems with how the concepts are presented, e.g. presenting one method as better than another, without explaining that decision. Can anyone recommend some good material on collision detection? I'd prefer it if kept the implementation details as language-independent as possible, e.g. by implementing the concepts in pseudo-code. Language-specific materials are not completely unwelcome though, though I'd prefer those to be in either Java, C#, F# or Python or similar languages, as those are the ones I'm most familiar with. :-) Lastly, is there perhaps widely known and used book on collision detection that most people should know about, like a 'the book on collision detection'?

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