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  • WEB based HPC cluster node management

    - by Skuja
    Hello, i am working on my school diploma thesis. The main goal is to create web based application where logged users could see free and busy nodes, turn them on and off, see what process they are running etc. Figured out that i could do something like this - write some cron daemon that would run every 30seconds or so, and it could run ping utility for each node to find out if it is on or off, then write results to some file. Then from my web app (i will write in PHP) i could read the info. Will it be a good solution? How would you suggest me to do it? And finally, is there any existing solutions (it may not be a definetly ewb based) for managment of cluster nodes?

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  • Hyper-V management remotely

    - by Péter
    I'll tell you in advance that I'm newbie in the topic. I have a Win8 (Home) machine with Hyper-V installed behind a router. The router has a public IP and a domain attached. I have another Win8 (Work) machine also installed Hyper-V. I want to access to my home Hyper-V via Hyper-V Manager so I can manage my virtual machines from work. I found this article but I don't know if it's applicable to me. I thought that a simple port forwarding should work and I only need to do is grant the Work HV manager my domain and the port I choose and if it's pop a login form I only need to fill the user data of my Home computer? How can I solve this? My thoughts revolve around: - Port forwarding - set domain+port and set my home user - Set up a VPN and use the local ip address of my home computer (it looks like a little cumbersome and my router only support PPTP) I'm open to any other solution too. Thanks, Péter

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  • Application for time and project management

    - by user10826
    I want to improve the way I organize my projects/tasks/schedule What I do now is: keep an excel sheet with the name of the most important tasks/projects, I look at it at the beginning of each day and decide the ones I will focus on on iCal I write down events for each day, or for a concrete time (13 to 14 hours). I set up each day the tasks I want to accomlish, and allocate them hours I use Things (culture code) to keep info about tasks and projects not very important and which are not time allocated yet (GTD name = someday) I use Mail on Mac and create folders for the mails I want to process with the name of the different projects I save the main info for each project on freemind maps My system works well at the moment but it is pretty complicated to use. I want to make it better and I am looking for something with these requirements: must be 100% offline accessable it should use as less programs/resources as possible, ideally just one program should be able to manage all my info I can use the GTD methodology mixed with priorities and I can allocate each task converted to event on my calendar I can have different daily/weekly, etc views on a calendar to see the "big picture" must run on mac os x leopard price does not matter, I will pay for this So, according to your experience, can you recommend me something like this? Thanks

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  • Cable management between multiple racks

    - by RippieUK
    I am in the planning phase of re-cabling our 5 racks in one of our offices and I would like to ask for some guidance on how you go, or would go about managing cables that goes between racks. In our situation we have 5 racks where the furthest to the right is our main patch panel for 300 floor ports. The rack next to it is our main comms rack where main switches and ISP routers are located. the other 3 racks next to the comms rack then all need to connect back to the main comms rack. I am not sure if a 48 port patch panel in each rack would be any good for this scenario? mainly because i am not sure this can be linked back to the main switch with only 1 cable. Would a 48 port switch in each rack be better as you can uplink those back to main switch? Or should we just run cables between racks back to the main switch? Hope someone can offer some guidiance. Thx

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  • Securing a persistent reverse SSH connection for management

    - by bVector
    I am deploying demo Ubuntu 10.04 LTS servers in environments I do not control and would like to have an easy and secure way to administer these machines without having to have the destination firewall forward port 22 for SSH access. I've found a few guides to do this with reverse port (e.g. howtoforge reverse ssh tunneling guide) but I'm concerned with security of the stored ssh credentials required for the tunnel to be opened automatically. If the machine is compromised (primary concern is physical access to the machine is out of my control) how can I stop someone from using the stored credentials to poke around in the reverse ssh tunnel target machine? Is it possible to secure this setup, or would you suggest an alternate method?

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  • Open Source Salon Management Software Suggestions?

    - by Brian Scott
    I'm looking for a decent open source salon management system to recommend to a friend. I've considered writing a new system in .Net but the website aspect is already covered. What's really required at this stage is an decent reservation and stock management application that I could put in place for them. If there are recommendations for commericial pacakages which are reasonably priced I would also like to hear them. Thanks.

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  • What I should know about memory management?

    - by bua
    first of all: I don't use stackadmin or similar so please don't vote for moving there, I'm reading man top and paper "what every programmer should know about memory ..." I need really simple explanation like for retard ;) Having following top dump: top - 11:21:19 up 37 days, 21:16, 4 users, load average: 0.41, 0.75, 1.09 Tasks: 313 total, 5 running, 308 sleeping, 0 stopped, 0 zombie Cpu(s): 0.4%us, 0.6%sy, 0.9%ni, 96.2%id, 0.1%wa, 0.0%hi, 1.9%si, 0.0%st Mem: 132103848k total, 131916948k used, 186900k free, 54000k buffers Swap: 73400944k total, 73070884k used, 330060k free, 13931192k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 3305 tudb 25 10 144m 52m 940 R 6.0 0.0 1306:09 app 3011 tudb 15 0 71528 19m 604 S 3.3 0.0 171:57.83 app 3373 tudb 25 10 209m 93m 940 S 3.0 0.1 1074:53 app 3338 tudb 25 10 144m 47m 940 R 2.7 0.0 780:48.48 app 4227 tudb 25 10 208m 99m 904 S 1.3 0.1 198:56.01 app 8506 tudb 25 10 80.7g 49g 932 S 2.0 39.6 458:31.22 app I'm wondering what is: RES (my expl. physical memory consumption ? see 49GB) VIRT (memory mapped disk to cache? see 80GB) SHR (shared pages?) Swap: (is this cached label - for memory mapped disk into swap cache?) Should sum of RES give MEM: X used? or maybe sum of VIRT?

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  • Tips for Domain Name Management?

    - by bofe
    Expired domain names = downtime for websites. Downtime = bad. How does your organization make sure domain names have been renewed? I believe ICANN requires registrars to give a notice at 60 days and 30 days, but these can easily get ignored -- especially with a large amount of domains. Does your solution work for a large amount of domain names? ( 100) Is it registrar specific?

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  • Is there a distributed project management software like Redmine?

    - by Tobias Kienzler
    I am quite familiar with and love using git, among other reasons due to its distributed nature. Now I'd like to set up some similarly distributed (FOSS) Project Management software with features similar to what Redmine offers, such as Issue & time tracking, milestones Gantt charts, calendar git integration, maybe some automatic linking of commits and issues Wiki (preferably with Mathjax support) Forum, news, notifications Multiple Projects However, I am looking for a solution that does not require a permanently accesible server, i.e. like in git, each user should have their own copy which can be easily synchronized with others. However it should be possible to not have a copy of every Project on every machine. Since trac uses multiple instances for multiple projects anyway, I was considering using that, but I neither know how well it adapts to simply giting the database itself (which would be be easiest way to handle the distribution due to git being used anyway), nor does it include all of Redmine's feature. So, can you recommend me a distributed project management software? If your suggestion is a software that usually runs on a server please include a description of the distribution method (e.g. whether simply putting the data in a git repository would do the trick), and if it's e.g. trac, please mention plugins required to include the features mentioned.

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  • Career advice on whether to stick with coding or move on to tech. lead\management [closed]

    - by flk
    I'm at a point in my career where I need to decide what to do next. I've mainly done C# desktop development (with a little python and Silverlight) for 5 or 6 years and I'm trying to decide whether to start learning JavaScript\HTML or to moving into a role where I do less coding and more tech. lead\management role. With all the talk around HTML5\JavaScript, the rise of mobile and the changes with Windows 8 (metro at least) I wonder if I should stick with coding to get some experience in these areas before moving on. But at the same time if I decide stick with coding for a ‘couple more years’ I will probably be faced with the same situation with some other new\interesting technology that I feel I should learn before moving on. I feel if I stick just with coding I'm limiting my career options but if I move to tech. lead\management I will loose my coding skills. Is going one direction or the other going to limiting my career options in the future? I know that there is no real answer to this question so I’m really just looking for some thoughts from others and perhaps experiences from other people that faced similar situations. Thanks

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  • Introduction to Lean Software Development and Kanban Systems – Create Knowledge and Amplify Learning

    - by Ben Griswold
    In this post, we’ll continue the series by concentrating on Principle #2: Create Knowledge and Amplify Learning In the next part of the series, we’ll dive into Principle #3: Build Integrity and Quality In. And I am going to be a little obnoxious about listing my Lean and Kanban references with every series post.  The references are great and they deserve this sort of attention.  

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  • Moodle: The free learning platform

    <b>The H Open:</b> "Moodle , the E-learning platform, is one of the most significant and successful projects in open source. Despite its success, with hundreds of thousands of people being taught by courses written in Moodle, as a product it is not well known."

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  • Learning XNA/Xbox Development [closed]

    - by CJ Sculti
    Possible Duplicate: How should I go about learning XNA? so I would like to get into Xbox game development (indie games.) The problem is I cant find ANY documentation or place to get started online. I was hoping someone here could point me in the right direction (tutorials or documentation.) I was also hoping someone could direct me to some kind of online course? (Paid or free.) I appreciate your time, thanks.

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  • SCORM and the Learning Management System (LMS)

    What actually is SCORM? SCORM, Shareable Content Object Reference Model, is a standard for web-based e-learning that has been developed to define communication between client-side content and a runti... [Author: Stuart Campbell - Computers and Internet - October 05, 2009]

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  • Experiences with learning Chinese

    - by Greg Low
    I've had a few friends asking me about learning Chinese and what I've found works and doesn't work. I was answering a question on a mailing list today and I thought I should post this info where it might be useful to many. The question that was initially asked was whether Rosetta Stone was useful but I've provided much more info on learning the language here. I’ve used Rosetta Stone with Chinese but it’s really hard to know whether to recommend it or not. Rosetta Stone works the same way in all languages. They show you photos and then let you both see and hear the target language and get you to work out what they’re talking about. The thinking is that that’s how children learn. However, at first, I found it very frustrating. I’d be staring at photos trying to work out what they were really trying to get at. Sometimes it’s far from obvious. I could not have survived without Google Translate open at the same time. The other weird thing is that the photos are from a mixture of countries. While that’s good in a way, it also means that they are endlessly showing pictures of something that would never happen in the target language and culture. For any language, constant interaction with a speaker of the target language is needed. Rosetta Stone has a “Studio” option. That’s the best part of the program. In my case, it lets me connect around twice a week to a live online class from Beijing. Classes usually have the teacher plus two to four students. You get some Studio access with the initial packages but need to purchase it for ongoing use. I find it very inexpensive. It seems to work out to about $70 (AUD/USD) for six months. That’s a real bargain. The other downside to Rosetta Stone is that they tend to teach very formal language, but as with other languages, that’s not how the locals speak. It might have been correct at one point but no-one actually says that. As an example, Rosetta Stone teach Gonggòng qìche (pronounced roughly like “gong gong chee chure” for bus. Most of my friends from areas like Taiwan would just say Gongche. Google Translate says Zongxiàn (pronounced somewhat like “dzong sheean”) instead. Mind you, the Rosetta Stone option isn't really as bad as "omnibus"; it's more like saying "public bus". If you say the option they provide, people would understand you. I also listen to ChinesePod in the car. They also have SpanishPod. Each podcast is about five minutes of spoken conversation. It is very good for providing current language. Another resource I use is local Meetup groups. Most cities have these and for a variety of languages. It’s way less structured (just standard conversation) but good for getting interaction. The obvious challenge for Asian languages is reading/writing. The input editors for Chinese that are part of Windows are excellent. Many of my Chinese friends speak fluently but cannot read or write. I was determined to learn to do both. For writing, I’m talking about on a computer, not with a pen. (Mind you, I can barely write English with a pen nowadays). When using Rosetta Stone, you can choose to have the Chinese words displayed in pinyin (Wo xihuan xuéxí zhongguó) or in Chinese characters (???????) or both. This year, I’ve been forcing myself to just use the Chinese characters. I use a pinyin input editor in Windows though, as it’s very fast.  (The character recognition input in the iPad is also amazing). Notice from the example that I provided above that the pronunciation of the pinyin isn’t that obvious to us at first either.  Since changing to only using characters, I find I can now read many more Chinese characters fluently. It’s a major challenge though. I can read about 300 now and yet you need around 2,500 to be able to read a newspaper fairly well. Tones are a major issue for some Asian languages. Mandarin has four tones (plus a neutral tone) and there is a major difference in meaning between two words that are spelled the same in pinyin but with different tones. For example, Ma (3rd tone?) is a horse, Ma (1st tone?) is like “mom”, and ma (neutral tone?) is a question mark and so on. Clearly you don’t want to mix these up. As in English, they also have words that do sound the same but mean different things in different contexts. What’s interesting is that even though we see two words that differ only by tone as very similar, to a native speaker, if you say the right words with the wrong tone, you might as well have said a completely different word. My wife’s dialect of Chinese has eight tones. It’s much worse. The reason I’m so keen to learn to read/write Chinese is that even though the different dialects are pronounced so differently that speakers of one dialect often cannot understand another dialect, the writing is generally the same. The only difference is that many years ago, the Chinese government created a simplified set of characters for some of the most commonly used ones. Older Chinese and most Cantonese speakers often struggle with the simplified characters. This is the simplified form of “three apples”: ????   This is the traditional form of the same words: ????  Note that two of the characters are the same but the middle two are quite different. For most languages, the best thing is to watch current movies in the target language but to watch them with the target language as subtitles, not your native language. You want to know what they actually said, not what it roughly means (which is what the English subtitle would give you). The difficulty with Asian languages like Chinese is that you have the added challenge of understanding the subtitles when they are written in the target language. I wish there were Mandarin Chinese movies with pinyin subtitles. For learning to read characters, I also recommend HanCard on the iPad. It is targeted at the HSK language proficiency levels. (I’m intending to take the first HSK exam as soon as I’m ready). Hope that info helps someone get started.  

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  • Learning to implement dynamic language compiler

    - by TriArc
    I'm interested in learning how to create a compiler for a dynamic language. Most compiler books, college courses and articles/tutorials I've come across are specifically for statically typed languages. I've thought of a few ways to do it, but I'd like to know how it's usually done. I know type inferencing is a pretty common strategy, but what about others? Where can I find out more about how to create a dynamically typed language?

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  • Open Source programs for learning C#

    - by dizzytri99er
    I was wondering if there are any good open source programs out there that are basically 'all-skill' encompassing that i could use to develop my skills Im a strong believer in learning by doing so a nice open source program i could load onto my machine to learn C# would be ideal. I have some knowledge with basic C# and a little more advanced techniques so im not a total beginner i realise similar questions have been asked before but i was just trying no see if there is one definitive one rather than lots of little projects hopefully im not asking too much! haha

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  • The Learning Map

    - by user12652314
    Danny Hillis has always been a favorite since he opened the first Java Day back in 1995. Now it's great to see him talking about the challenge we are just about to address with our new "Learning Exchange" Industry Solution which brings all the power of Oracle technology to the address the challenge for lifelong learners. The current thought is to launch it at the Edu tech event at CES along with a special dinner reception with our content friends at Digital Hollywood. Stay tuned.

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  • Learning a New Skill With a Tutorial on Building a Website

    You may want to avail of a tutorial on building a website in order to learn how to make that website all by yourself. Learning how to make a website using your own skills can be satisfying and enjoyable. Not only will you learn a thing or two about website building, you can always be proud that you made your own website with your hard work and your two hands.

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  • I want to create an e-learning website [closed]

    - by Viswa
    I want to create an e-learning website and host it. (Maybe after some time I want to add forms.) These are the things I know: java, jsp, servlet, html (not guru, almost beginner). I don't have experience in creating websites, I did my college project using jsp,servlet and jdbc. What are the things or technology I need to know before creating website. Is it possible to create a website by one person?

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