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  • Why Hadoop is tightly bound to linux?

    - by user1676346
    I am new with Hadoop. What are the specific reasons why Hadoop is so tightly bound with Linux, and the cluster it runs upon is homogeneous? I'm looking for really specific details that can tell me why Hadoop does not work well with windows, and if there are some libraries some specific scripts that are involved? My project is to deploy Hadoop without using Cygwin. I have already seen the article from Hayes Davis where he explained how to install Hadoop without Cygwin, but he said that there are some bugs. I might start from scratch to properly configure Hadoop on Windows, but if any one can explain what, specifically, are the reasons that Hadoop doesn't work well on windows that would be very helpful.

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  • Is it possible to draw simultaneously on a panel?

    - by swift
    I have to develop a whiteboard application in which both the local user and the remote user should be able to draw simultaneously, is this possible? If possible then any logic? I have already developed a code but in which i am not able to do this, when the remote user starts drawing the shape which i am drawing is being replaced by his shape and co-ordinates. This problem is only when both draw simultaneously. any idea guys?

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  • What books should be read to become an excelent software architect.

    - by dev-cu
    I know there are good books to start with, but let's make a short list of 3-5 books, i don't think only one book could help you in the way of becoming a good architect. I read some time ago that an architect takes years to have the knowledge and the ability to make good decisions. Suppose someone has the potential, what is the way? Please, answers with books that doesn't repeat over the same theme, making your learning process widely. One short list per answer. Vote up that you think are the best ones. Thanks.

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  • get_iplayer _ new problem

    - by Squiggle
    I have get_iplayer installed on a Windows 7 PC and, generally, it has worked without too many problems. Now I find that I cannot download "The Sinking of the Laconia" from the BBC. Both episodes are still available for viewing (although only episode 2 has a live ' download' option). An error message saying 'ERROR: RTMP_ReadPacket, failed to read RTMP packet header' may be relevant? If anyone can help before the programme becomes unavailable, I'd be grateful

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  • Assign pointers in objective C

    - by Tattat
    -(id)setBigObject:(BigObject *)abc{ self.wl = abc; abc.smallObject = self.smallObject; } I have a abc, which is a big Object, when the user pass the bigObject, abc. I assign to my wl value, so , I write "self.wl = abc;", but I want my smallObject assign to the abc's smallObject, so, I do "abc.smallObject = self.smallObject; " So, when I edit the smallObject in self, it will also changed in the abc's also? Am I right?

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  • What is my error in a map in java?

    - by amveg
    Hello everyone I am trying to solve this problem: http://www.cstutoringcenter.com/problems/problems.php?id=4, but I cant figure out why my code doesnt solve this, I mean in the "for" how can I can multiply the letters? what is my error?, It just tell always 7, but I want to multiple all the letters, I hope you can help me enter code here public class ejercicio3 { public static void main(String args[]) { Map<Character, Integer> telefono = new HashMap<Character, Integer>(); telefono.put('A', 2); telefono.put('B', 2); telefono.put('C', 2); telefono.put('D', 3); telefono.put('E', 3); telefono.put('F', 3); telefono.put('G', 4); telefono.put('H', 4); telefono.put('I', 4); telefono.put('J', 5); telefono.put('K', 5); telefono.put('L', 5); telefono.put('M', 6); telefono.put('N', 6); telefono.put('O', 6); telefono.put('P', 7); telefono.put('R', 7); telefono.put('S', 7); telefono.put('T', 8); telefono.put('U', 8); telefono.put('V', 8); telefono.put('W', 9); telefono.put('X', 9); telefono.put('Y', 9); String mensaje = "Practice"; int producto = 1; for (char c : mensaje.toCharArray()) { if (telefono.containsKey(c)) { producto = telefono.get(c) * producto; System.out.println(producto); } } } }

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  • Fast MMS streaming downloader?

    - by OverTheRainbow
    VLC can download MMS streaming video using the following command... C:\Program Files\VideoLAN\VLC>vlc mms://blah.akamaistream.net/mystreaming.wmv :demux=dump :demuxdump-file=mystreaming.ps ... but it downloads the show at the regular reading speed. For shows that last longer than a few minutes, I was wondering if someone could recommend a good, preferable free, download for Windows to speed downloading?

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  • What are the best websites/web applications for specific languages?

    - by JM4
    Browsing around Stackoverflow, I get overwhelmed with the number of "Why should I learn Python/Ruby/PHP/.Net/jQuery..." and the list goes on. Most answers, although good, are usually battles from language A programmer to language B programmer detailing why one piece sucks more than another. People can discuss the theoretical benefits of one over another but in the end, money/glitz talks and the rest walks. I am more interested in the potential opportunity that can come from one language or another over others. A little background, I am a project manager turned novice 'programmer' out of corporate necessity within the small company I currently work with so I have both relatively no set preference or experience, more out of curiosity. While I realize all are not created equal and for similar things, I think it would be interesting to start a list of the best websites / web applications built on specific languages/frameworks just to highlight the possibilities with each and give somebody like me motivation to say "How the heck was that done? Time to buy a book/take a class and learn." Tell me and I will forget, Show me and I will learn, Involve me and I will understand - Teton Lakota

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  • How can I unzip a .tar.gz in one step (using 7-Zip)?

    - by quickcel
    I am using 7-Zip on Windows XP and whenever I download a .tar.gz file it takes me two steps to completely extract the file(s). I right-click on the example.tar.gz file and choose 7-Zip -- Extract Here from the context menu. I then take the resulting example.tar file and the right-click again and choose 7-Zip -- Extract Here from the context menu. Is there a way through the context menu to do this in one step?

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  • Running 2 threads simultaneously

    - by lamsaitat
    In the case of an IM client. I have made 2 separate threads to handle sending packets (by std io) and receiving packets. The question is how to make these 2 threads run simultaneously so that I can keep prompting for input while at the same time be ready to receive packets at any time? I have already tried setting a timer but the data is always lost receiving.

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  • Make All Types Constant by Default in C++

    - by Jon Purdy
    What is the simplest and least obtrusive way to indicate to the compiler, whether by means of compiler options, #defines, typedefs, or templates, that every time I say T, I really mean T const? I would prefer not to make use of an external preprocessor. Since I don't use the mutable keyword, that would be acceptable to repurpose to indicate mutable state. Potential (suboptimal) solutions so far: // I presume redefinition of keywords is implementation-defined or illegal. #define int int const #define ptr * const int i(0); int ptr j(&i); typedef int const Int; typedef int const* const Intp; Int i(0); Intp j(&i); template<class T> struct C { typedef T const type; typedef T const* const ptr; }; C<int>::type i(0); C<int>::ptr j(&i);

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  • Shared memory of same DLL in different 32 bit processes is sometimes different in a terminal session

    - by KBrusing
    We have an 32 bit application consisting of some processes. They communicate with shared memory of a DLL used by every process. Shared memory is build with global variables in C++ by "#pragma data_seg ("Shared")". When running this application sometime during starting a new process in addition to an existing (first) process we observe that the shared memory of both processes is not the same. All new started processes cannot communicate with the first process. After stopping all of our processes and restarting the application (with some processes) everything works fine. But sometime or other after successfully starting and finishing new processes the problem occurs again. Running on all other Windows versions or terminal sessions on Windows server 2003 our application never got this problem. Is there any new "feature" on Windows server 2008 that might disturb the hamony of our application?

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  • Small Business Setup SSO LDAP VPN [closed]

    - by outsmartin
    We are not sure how to setup an efficient network. Things we got so far: Linux Server ( probably Debian ) 3 Desktops + some Laptops ( Win / linux ) NAS ~10 people working 50/50 devs/normal people :) Things we want to achieve: Working from home should be easy, VPN and firewall single username/password for everybody windows/linux desktops should have automatic synched home folders / preferably from the NAS automated hostnames for apps so others can access them like http//john.dev_app from everywhere in the VPN Need starting point and documentation on setting up with Open source tools like OpenVPN and OpenLDAP Any recommendations or links to further literature are welcome.

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