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  • Software Architecture: How to divide work to a network of computers?

    - by Morpork
    Imagine a scenario as follows: Lets say you have a central computer which generates a lot of data. This data must go through some processing, which unfortunately takes longer than to generate. In order for the processing to catch up with real time, we plug in more slave computers. Further, we must take into account the possibility of slaves dropping out of the network mid-job as well as additional slaves being added. The central computer should ensure that all jobs are finished to its satisfaction, and that jobs dropped by a slave are retasked to another. The main question is: What approach should I use to achieve this? But perhaps the following would help me arrive at an answer: Is there a name or design pattern to what I am trying to do? What domain of knowledge do I need to achieve the goal of getting these computers to talk to each other? (eg. will a database, which I have some knowledge of, be enough or will this involve sockets, which I have yet to have knowledge of?) Are there any examples of such a system? The main question is a bit general so it would be good to have a starting point/reference point. Note I am assuming constraints of c++ and windows so solutions pointing in that direction would be appreciated.

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  • Cannot connect to Internet via Wifi

    - by lvogel
    I have a laptop that's currently configured as a dual-boot. The problem: I cannot connect to the Internet in the home wireless network through Ubuntu in the apartment where I currently live. The strange part: I can connect to it just fine through Windows (as right now), and I can use the Internet through Ubuntu on this computer with all the other wireless networks I have tried. The problem is only with this particular combination. The only possible explanations I can think of are either that this network is WPS, or that it's a driver problem--Vodafone router. The router 'sees' the computer--and it says it's connected; however, I keep getting prompted for a password, and I enter the key that works with Windows, but in Ubuntu it just keeps asking for it repeatedly, and I can't access the Internet. I don't have an ethernet cable at the moment, but if someone would be so kind as to ask me questions I will gladly answer, and if you have suggestions, I will do them--the only thing is, I am subletting this apartment from someone who is away on vacation, so I don't want to screw with the router settings unless I know what I'm doing! - I do not have Wicd - Yes, I have the router's information (key works in Windows) - Feedback of lshw says that the wireless card is Ultimate N Wifi Link 5300, vendor: Intel Corporation, physical id: 0 ,etc. The first two commands I was told to try work OK, but when I typed sudo ifconfig wlan0 essid ..... I got back 'essid: Unknown host' Would my question be better on the Ubuntu forums than here on AU?

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  • Does the size of the monitor Matter?

    - by Arsheep
    I have a old computer, and I want to buy a big LCD. The best I've found so far is Viewsonic's 24" LCD TFT monitor. So will it run without any problems, or do I need to upgrade the video cards or something as well? The computer is not too old: it has P4 board and celeron processor, with 128 graphics memory. And in display properties, it says that the maxium that I can use is 1280 x 1024 resolution. I am noob hardware-wise, so need help on this stuff. Thanks

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  • Does the size of the monitor Matter?

    - by Arsheep
    I have a old computer, and I want to buy a big LCD. The best I've found so far is Viewsonic's 24" LCD TFT monitor. So will it run without any problems, or do I need to upgrade the video cards or something as well? The computer is not too old: it has P4 board and celeron processor, with 128 graphics memory. And in display properties, it says that the maxium that I can use is 1280 x 1024 resolution. I am noob hardware-wise, so need help on this stuff. Thanks

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  • Does the size of the monitor Matter?

    - by Arsheep
    I have a old computer, and I want to buy a big LCD. The best I've found so far is Viewsonic's 24" LCD TFT monitor. So will it run without any problems, or do I need to upgrade the video cards or something as well? The computer is not too old: it has P4 board and celeron processor, with 128 graphics memory. And in display properties, it says that the maxium that I can use is 1280 x 1024 resolution. I am noob hardware-wise, so need help on this stuff. Thanks

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  • Web Animations - the next generation

    Web Animations - the next generation The GDL event page for this event: developers.google.com Ask and vote for questions at www.google.com Browser developers are designing the next generation of animation features that will enhance HTML5 with rich, powerful new animation primitives. Designers and web app developers will all benefit from improved methods of animating content. Hear from developers of Google Chrome and Mozilla Firefox how this works, and learn how to try out the new animation features now in your favorite browser. From: GoogleDevelopers Views: 0 3 ratings Time: 30:00 More in Science & Technology

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  • always need administrator password...even my user and password is correct.. i cannot log in

    - by sulit09
    why the computer always need administrator password. when i change all the setting of my computer, all around ..... and when i log in my administrator password... still not working even it is correct....password....and user..... and this pc is connected to domain.. but i try to other pc . to login all also using windows administrator its open..... what is the problem itry run cmd as administrator need administrator password.....again.. , i try to open the properties of network need administrator passpowrd..again how to solve this problem my new pc is windows 7 .

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  • Multiple "setups" on windows 7

    - by Roberto
    I would like to create multiple setups on Windows, that is, when I'm working with my computer I have some programs opened, after that I would like to change the setup/user to the "gaming setup" where the previous setup would hibernate and the computer would have all the resources free for me to play. I could have opened multiple tabs on firefox on each setup and they would be there when I come back. I understand that windows' switch user would make the programs run when I'm with the other user and that's not what I want. So, is that possible?

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  • Black Screen after installing recommended Nvidia drivers. What to do?

    - by former_Windows_user
    New to Ubuntu. Problem description: Until recently I had Windows on my computer. My hard disk is divided into two partitions. On the first one (app. 10 GB) I had my Windows XP On the second one (app. 30 GB) I have some data I tried to install Ubuntu 12.04 on the first partition (the smaller one). Since I wanted to keep the data on my second partition, I chose the third install option. During the installation process I deleted the data on partition one, created a new partition with the same size, formatted it as ext4 and mounted / on it. The installation continued fine and at the end I restarted and took the CD out when it ejected automatically (it could have been also before the restart). Ubuntu started but I noticed that my computer was slow. Then a prompt appeared telling me that I did not have the optimal NVidia drivers and recommended to install a specific one. I clicked on the recommended driver, installation went apparently just fine and at the end I had to restart the system again. I did it, Ubuntu started, asked for my password, I typed it, pressed Enter, the screen turned black and remained like that (only the cursor was there and I could move it). I restarted and the same thing happened again. Has anyone had such a problem before and was able to solve it? With Windows I always installed drivers from CDs after installing Windows. Are the same CDs going to work for Ubuntu too or I should find special drivers? P.S. During the installation I was connected to the internet and I agreed on installing updates and the third party software. In the time before I installed that problematic but recommended NVidia driver I checked that there was between 6 and 7 GB free space on the first partition where I installed Ubuntu.

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  • Unexpected "waiting for localhost"?

    - by Tenaar
    So I ran into something that kind of worried me today. Lately my computer has been kind of slow and I'm dealing with that, but today when I opened Facebook in Google Chrome, I noticed a message in the bottom left corner while it was loading the site that said "Waiting for localhost". It was brief and I managed to notice it because my computer is slower than it used to & it caused Chrome to hang briefly, long enough for me to read it. As I'm quite confident in that Facebook isn't running on my localhost, I'm wondering what could potentially make Chrome wait for localhost while I'm loading webpages from external servers. Is there a malware of some kind that I should be worrying about? Unfortunately I have no other information than this to go on, and I have no idea how to further investigate this, if it generated any logs or whatever. I'd appreciate any help in figuring out this matter!

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  • Issues with new graphics card and drivers

    - by Ortund
    With my onboard graphics card (Intel HD 4000) I was able to use 1680x1050 screen resolution. Using the same screen and an Asus ENGTS250 graphics card with 296.10 drivers installed, I'm not able to use that resolution anymore. Also, I've been having other trouble with driver installations. Using 340.52 or 337.88, I can't boot into Windows 7. I see the Windows Welcome screen and then the screen goes black, loses signal and the computer locks up. I think the drivers issues and the resolution problems go hand-in-hand. I have a feeling I could use a newer driver than 296.10 which would give me access to use the 1680x1050 resolution I want to use, but I'm terrified that if I update or install another driver, that the computer will lock up again. Can anyone recommend a [better] driver for me to use?

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  • When to run SYSPREP

    - by haxel
    I am attempting to set up a computer using an answer file created by the WAIK and resetting the settings with SYSPREP and had a quick question. We are wanting to use Norton GHOST for our deployments. When do I run the sysprep? I figure it is after I get the computer all set up with the proper updates/software/drivers but I have not been able to find a direct answer to this online. Do i run it after everything is set up and the system is ready to be captured?

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  • Is there software that can visualize all sounds from the sound card?

    - by bentsai
    I'm looking for a solution to this problem: When I'm working at my computer, sometimes I'll be using noise-isolation headphones connected to a source other than my computer (e.g., an iPod). I would like to see (this is what I mean by "visualize") some kind of notification on my screen, since I will not be able to hear the sound. Is there any software out there that would accomplish this? I'm interested in seeing any sounds that would normally come out of th sound card. This is for Windows (XP), but I'd be interested in hearing solutions for other flavors, and OS X, as well.

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  • Error installing SQL Server 2005 Express on AMD Turion?

    - by Angel
    Hello. Is there some compatibility problem between SQL Server 2005 Express and AMD processors? I read something along those lines on various sites, but found nothing 100% definitive. I am trying to install SQL Server 2005 Express on a computer that runs Windows Vista Home Premium, 32-bit edition, and the CPU is "AMD Turion Dual-Core RM-70". I tried both the 32-bit and 64-bit installers, just in case, and the process runs fine until the moment the service attempts to start, where it fails with the same error every time. I'm sorry I can't provide more details or the exact message, it was on a client computer to which I have no access at the moment. I hope someone could shed some light on this. Thank you.

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  • remove an open wifi of a service provider near my house

    - by wannik
    I'm using Win 7. There is an access point of a service provider wifi near my house. The wifi is not free and not WEB/WPA protected. Everyone can connect to it and it will show the company's login page. (if the username/password are put correctly, their customer can use the net.) I'm not the customer of the company and have my own access point in my house. But my computer always connect to the network of that company. I tried to remove the network but it keep coming back and connect to that access point instead of mine. What can I do to make my computer choose my access point first?

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  • How to fix windows 7 boot process

    - by MasterCorban
    Ok so i used xp for years before i was able to get my hands on the Windows7 RC which i bought a new HDD for, and then followed the process to dual-boot. About a month ago xp started acting funny and i thought the disk might be dying. So i started using Windows7 all the time. Today i start the computer and it cant find the disk which xp was on anymore. I guess its dead. So i remove the xp HD and my computer cant start...insert bootable disk or something similar So how can i remove the primary(dead) xp disk and boot straight to Windows 7?

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  • How does a frame retrieve the recipient's MAC address?

    - by Sarmen B.
    I am studying a Network+ book named All-in-one CompTia Network+ by Mike Meyers. In chapter 2 he talks about frames and how he represents them as canisters and the data within the frame contains the recipients mac address, senders mac address, data, and sequence number. What I don't understand is if the sender is sending a file via the network to the recipient, and this frame contains this data, how does the frame know what the recipients MAC address is before sending it? In regards to TCP/IP when it contains the recipients IP address, that's understandable how it retrieves that value. But I don't understand how it can retrieve the MAC address, because if that frame comes from the senders computer, goes into the router and copies itself to each and every computer that exists on the network, how did it have the MAC address to know where to go? Let me know if I'm not making sense.

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  • Triple head DVI KVM

    - by cat pants
    I am trying to run a Linux desktop and Windows desktop simultaneously with a KVM for maximum productivity. Also running three monitors. I need a KVM that can do 3x DVI @ 1920x1080 + 2x usb (mouse and keyboard) + toslink for two machines. What would you suggest? I ask on here because I have searched quite a bit and have yet to find a KVM with these requirements. (I would be open to something like modifying 3x regular KVMs to control them with one button or similar) Thanks! (I tried posting this question earlier, but it was closed as being "not related to computer hardware or software" ... is a KVM not related to computer hardware or software? I'm pretty sure it is. kvm-switch has been tagged 100 times on here for example.)

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  • Certain websites do not open. Instead a 1*1 image gets displayed

    - by Ranjith - SR2GF
    When I try to visit certain websites like www.bidvertiser.com, www.buysellads.com, a white page shows up, the title bar displays the site name followed by (1x1) in brackets. When I right click, 'View Source' option appears disabled. The Save As.. option shows the file type to be gif. However, when I preview the site in Google search results ( by moving the mouse over ) the screenshot of the site displays well. This happens on all the three browsers on my computer: Chrome, Firefox and IE. What is the problem and how can it be resolved? EDIT: At some point of time, they probably worked on my computer! I think it is a more general problem. The same happens when I click on certain links in Google search results.

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  • For very beginning startup: home server or EC2?

    - by StCee
    The micro instance of Amazon EC2 only has ram of 613MB, my laptop got 8GB. And I suppose likewise the processing power of my computer would be better than the micro instance. My question is, what are the considerations in deciding to host yourself or on Amazon EC2, especially for a really baby startup? For example, would network speed be a problem? My computer broadband network is 100Mbs up to 1Gbs. What would Amazon compare to this? My site at these moment would just host some images and perform some php requests. I would probably also use cloudflare but seems it increases the dns lookup time considerably... And of course the overall objective is to make the best user experience.

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  • Windows 8 will only recognize the Blu Ray ROM, if the install disk is present at boot time [migrated]

    - by aceinthehole
    If I have the install disk in the blu ray ROM drive at boot time and subsequently remove the disk and replace it with blu ray media everything functions as I'd expect. However, if I have no media present, or another disk in the drive at boot time, then windows 8 does not seem to recognize that the blu ray player is even present in the computer. It is not present in the 'my computer' screen, device manager does not show the player, and scanning for new hardware yields nothing. It seems that the driver is installed and working as expect, what is it about having the windows 8 install disk in the drive or not that would cause this kind of behavior?

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  • Allow access only to one website

    - by Alex
    Hey. I'd like to allow access on a computer connected directly to the internet to one website ONLY. The solution of IE's "Content advisor" or firefox's "FoxFilter" isn't good enough because it actually downloads the data and just don't display it. I want to block the traffic before the requests are sent. How is it possible? Thanks. Edit: OS is windows xp. The browser can be firefox, iexplorer, chrome... It doesn't matter. The computer is connected directly to the modem.

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  • Resolution is Being Stupid. Help me?

    - by One Terrorist
    I'm having trouble with a new computer I bought a few days ago. I have come to the conclusion that the resolution of the screen is too small, at the moment it is 1024x768 and I think it should be 1280x960, due to a message given at the resolution tab of the control panel. It states: (!) If your resolution is below 1280x960, some items on the screen may not fit on the screen. The computer is an Asus A54H and runs 64-bit operating system with Windows 7 Home Premium. This link has a screenshot of the screen at the moment, the icons and font are too big and are a little stretched. Thank you in advance!

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  • Received a RAMPAGE IV FORMULA MOBO. Possible CPU Socket problems

    - by Tantan
    I recently received a Rampage IV Formula MOBO in a trade. From everything I read online this seems like a pretty nice piece of hardware. There's one thing I'm worried about though. It appears as though the socket where the CPU goes might have some bent/missing pins. I'm not exactly a computer expert and I wanted to know if this could be any sort of problem. I would post a picture but I apparently don't have enough rep for that... Also, if I did want to move my current rig onto the new MOBO would it even be worth it? MY CURRENT COMPUTER SPECS i3-3220 CPU 8GB DDR3 RAM GeForce GTX460 GPU With a Biostar MOBO!

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