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  • Hosting and scaling of a facebook application on cloud?

    - by DhruvPathak
    We would be building a facebook application in django(Python), but still not sure of where to host it economically,and with a good provision to scale in case the app gets viral. Some details about the app: i) Would be HTML based like a website,using django as a framework. ii) 100K is the number of expected pageviews in a day,if the app is viral. iii) The users will not generate any media content,only some database data will be generated by them. It would be great if someone with more experience can guide on following points: A) Hosting on google app engine or Amazon EC2 or some other cloud like RackSpace : Preferable points found in AppEngine were ease of deployment,cost effectiveness and easy scaling. For EC2: Full hold of the virtual machine,Amazon NoSQL and RDMBS database services in case we decide to use them. B) Does backend technology affect monthly cost ? eg. would CPU and memory usage difference of Django over , for example , PHP framework like CodeIgnitor really make remarkable difference in running costs. ( Here is the article that triggered this thought process : http://journal.dedasys.com/2010/01/12/rough-estimates-of-the-dollar-cost-of-scaling-web-platforms-part-i#comments) C) Does something like Heroku , which provides additional services over Amazon EC2, prove to be better than raw cloud management ? It is not that we are trying for premature scaling, we just want to have a good start so that we are ready to handle unpredicted growth and scale.

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  • misaligned raid partition in Ubuntu 10.04

    - by Linux Jedi
    I attached two identical hard drives to my linux machine. Then using gparted I formated the first 1024 mb at the beginning of each drive as linux swap space. Then I went into system-administration-disk utility. In there I went to file-create-RAID array. I selected the remaining space in each of the two identical hard drives and created a striped raid array. After the array was created, a warning message appeared. It said "The partition is misaligned by 522240 bytes. This may result in very poor performance. Repartitioning is suggested." What do I do now? As far as I can tell, the partitions are identical.

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  • Why can't I create a Windows backup on my secondary disk?

    - by Brian Sullivan
    I've installed Windows 7 Ultimate on an SSD that I've added to the XPS desktop that I bought from Dell. I would like to use the built-in backup functionality to create incremental backups and store them on the large drive that came with the machine. I formatted the large drive and turned it into a Basic disk. However, when I try to set the backup location to the large internal disk (E:\) in the "Set up backup" wizard, a get a message saying, "A system image cannot be saved on a drive that your computer boots from or that Windows is installed on." Windows is not installed on that disk. I even deleted the OEM partition that was on the disk, and removed it completely from the boot order in the BIOS. Any clue why Windows is griping at me about this?

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  • Why does my excel document have 960,000 empty rows?

    - by C-dizzle
    I have an excel document, Office 2007, on a Windows 7 machine (if that part matters any, I'm not sure but just throwing it out there). It is a list of all employee phone numbers. If I need to generate a new page, I can click on page 2 and the table will automatically generate again. The problem is, someone messed it up since it's on a network drive and now shows I have over 960,000 rows of data, when I really don't! I did CTRL+END to see if any data was in the last cell, so I cleared it out, deleted that row and column, but still didn't fix it. It almost seems like it duplicates itself after the deletion. How can I fix this instead of recreating the entire document?

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  • What causes random clicking/navigation sound while PC is idle?

    - by user14339
    On my Dell D630 laptop running Windows XP Pro SP3, I randomly hear the "Windows Navigation Start.wav" played. This happens even if the only application active on the PC at the time is Microsoft Outlook and no one is touching the keyboard or touchpad. The start navigation sound IS enabled for Internet Explorer (I have IE 7 installed), but it is not running (no window open, anyway). The clicks are rapid, as if being executed automatically by a script or process, and they always come in threes: "click-click, click". I don't see any changes on the display and I don't know how to figure out what's running that could cause this. I have tried to leave Windows Task Manager open in the hope that I'll see a process name jump to the top of the list briefly, but it doesn't happen that often and I guess I'm not quick enough. The PC is slower than I think it should be, but System Idle Process is at 96 - 99 during the event, and for most of the time when I'm not actually using the machine. Any ideas?

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  • Rsync and Windows 7

    - by Nate
    Can someone give me any tips on setting up some sort of Rsync server/client on Windows 7 to run rsync between both my web hosting server, and a backup server that I have running Ubuntu? I've tried setting it up with this tutorial: http://www.youtube.com/watch?v=CvwdkZLNtnA Using copssh, and cwrsync. Ran into all sorts of troubles, including not being able to get cwrsync to run (it installs properly, but never starts up), and copssh not generating the keys at all. The guy was running Windows Server 2003, though, so I'm guessing the problems could just be because I'm running Windows 7. I've been trying to set it up with my Windows machine being the rsync server, and then Ubuntu and my webhosting VPS as the clients, but I realize it may be easier (and make more sense) to just setup the rsync server on Ubuntu, and then an rsync client on Windows 7? Can anyone point me in the right direction? I'm thinking of using this guide: http://www.gaztronics.net/rsync.php It seems a bit outdated, though.

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  • Name of my sql server instance from outside the network

    - by Michel
    Hi, normally i connect to my sql server instance from my local computer, and then the server name to connect to is the name of my laptop. So i can connect to server instance 'MichelLaptop' But now i'm trying to connect to my server from outside my network, and the first thing i wonder is: what is the name of the instance? i've made a redirect to my local machine in the DNS of my domain, so i said (this is not the real data) testsql.mydomain.com goes to 190.191.192.193 and when i ping testsql.mydomain.com, i get a response from 190.191.192.193 But what then is the server name?

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  • How to Install Apache Solr / Java on CentOS?

    - by geerlingguy
    I've seen only one or two tutorials for installing Solr, and particularly Java, on a CentOS machine, and they seem to be overly complex; heck, I can't quite figure out which version of Java (it seems there are many) to install... I'm not a full time sysadmin, so I would like to know what Java version/package I would need to use, and if there's a good tutorial with relatively easy to follow steps for installation. I'm going to try to get Solr working with some Drupal sites, and that part of the equation doesn't seem as hard as the Java side...

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  • Newbie: VirtualBox "no bootable medium found"

    - by Newton Falls
    My first foray into VM land so please excuse the stupidity expressed below. Running VirtualBox on Kubuntu 9.10 and trying to set up a VM running Windows 7. Windows 7 came installed and is functional as a dual-boot but I want to stay in kubuntu hence the VM. Received "Fatal: no bootable medium found" when trying to start a VM. Not surprising since VBox never gave me an option (that I recognized anyway) to tell it to look on the hard drive. I did not receive a CD of Windows 7 with the machine. How can I tell VirtualBox to grab what it needs from the hard drive? Or am I out of luck because I don't have a CD? Update: This might not be possible. The installed Windows 7 is useful only to pull the installation key. It is easier to just to download or get an ISO from a friend and enter in your own key.

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  • Installing 10.04 server on HP xw9400 Workstation with RAID 5

    - by Dave Long
    I have a workstation that was given to me that is a friggen powerhouse, so I figured I would set it up as my development and demo server. This is my first experience installing Ubuntu onto a RAID array and so far it has not been a fun one. I have been following the Advanced Installation guide for installing Ubuntu 10.04 server, and it says that there will be an option on the Partition Disks screen to manually create the partitions, but the only options I have are: Configure iSCSI volumes Undo changes to partitions Finish partitioning and write changes to disk Just before I got to that screen I got a message that said: One or more drives containing Serial ATA RAID configurations have been found. Do you wish to activate these RAID devices? It doesn't matter whether I answer yes or no to that, I still get the same Partition Disks screen. When I try to select Finish partitioning and write changes to disk I just get the No root file system error. Has anyone else experienced this, and how do I get past it? Can I not run Ubuntu on this machine?

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  • Search Files (Preferably with index) on Windows 2000 Server

    - by ThinkBohemian
    I have many files on a windows server 2000 machine that is setup to act as a networked disk drive, is there anyway I can index the files and make that index available as a search to more people than just me? Bonus if the index can look inside of documents such as readme.txt? If there is no easy way to do this globaly (for all users) Is there a way I could generate and store an index locally on my computer? If this is the wrong place to ask this question, any advice on community more suited?

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  • OpenVPN client on Amazon EC2

    - by Matt Culbreth
    I have an account with an OpenVPN service, and I'd like to get that running on my EC2 instance running Ubuntu 12.04. I have my config file in /etc/openvpn, and it connects fine when I run sudo openvpn --config matt.ovpn. However, I then lose connectivity to the EC2 machine, and I can't SSH back to it until I reboot. Previously I have done things like sudo ip rule add from IP_ADDRESS table 10 and then sudo ip route add default via GATEWAY_IP table 10, but that's not working on EC2. Any ideas? My private IP address right now is 10.209.29.XXX and my gateway is 10.209.29.1.

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  • ADD ROUTE command in windows 2008R2

    - by Mehrdad Kamelzadeh
    I don't know much about Networking, So excuse me if I am raising some basic issues. I have a LAN where there is a Windows Server 2008R2 with some clients connected to it. The clients are not joined to the domain of the Server (they are in a WORKGROUP). I have set up a VPS on the server machine (PPTP) with a Static address pool of range 10.0.0.1 - 10.0.0.10 but the LAN range itself is 192.168.1.1 - 192.168.1.254. When I connect to the server from another location over the internet, I can just see the server and I can not see the other clients which are in the same LAN as the server. what to do to see the other clients? a friend of mine said that you should use the ADD ROUTE command. Beacuse of that I used this command as my title. What would be the best way to address this problem? Thanks

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  • changing filesystem format from jfx to ext4 without losing data

    - by A.Rashad
    I have a fresh Lucid Lynx (Ubuntu 10.04) running on a laptop. where I defined the filesystems as: mount point / on ext4 (46 Gb) mount point /home on jfs (63 GB) swap as 3 Gb I left the machine over night to do some task, without AC power supply. next day in the morning I found it on standby, task completed, but filesystem was not reachable. it gave me I/O error it seems that there is a problem with jfs and standby. anyways, to avoid any hassle, I want to move this mount point from jfs format to ext4. can I do this without losing data and without the need to place the data in a temporary location until transformation is done? sorry to mention that, but I recall back in the windows days, we would change a FAT16 to FAT32 or a FAT32 to NTFS without having to lose the data. I hope this is available on Linux.

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  • Printing on Windows 8 64-Bit through Windows Server 2008 (32 Bit) RemoteApp

    - by Chris
    We have a network where our server is running on Windows Server 2008 (32 Bit) and a client computer is running on Windows 8.1 (64 bit) with a local printer attached to the client. The printer is an HP P1006. The remote app works well but when trying to print we get an odd "error 545". We have tried both using the "connect client printer" function in remoteapp and also making the printer shared over the network and printing to it via the network from within the remoteapp. Nothing works. We can print a test page from the server to the client computer just fine, but it seems from remoteapp we cannot. We have also tried installing the 32 bit drivers on the 64 bit machine as both the primary and secondary drivers but cannot get them to install. Suggestions please? We've been going crazy over this issue.

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  • Text template or tool for documentation of computer configurations

    - by mjustin
    I regularly write and update technical documentation which will be used to set up a new virtual machine, or to have a lookup for system dependencies in networks with around 20-50 (server-side) computers. At the moment I use OpenOffice Writer with text tables, and create one document per intranet domain. To improve this documentation, I would like to collect some examples to identify areas where my documents can be improved, regarding general structure and content, to make it easy to read and use not only for me but also for technical staff, helpdesk etc. Are there simple text templates (for example for OpenOffice Writer) or tools (maybe database-driven) for structured documentation of a computer configuration? Such a template / tool should provide required and optional configuration sections, like 'operating system', 'installed services', 'mapped network drives', 'scheduled tasks', 'remote servers', 'logon user account', 'firewall settings', 'hard disk size' ... It is not so much low-level hardware docs but more infrastructure / integration information in these documents (no BIOS settings, MAC addresses).

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  • Why is my ftp connection timing out?

    - by NEPatriot
    This is the log info: Status: Connected Status: Retrieving directory listing... Command: PWD Response: 257 "/" is your current location Command: TYPE I Response: 200 TYPE is now 8-bit binary Command: PASV Response: 227 Entering Passive Mode (173,201,145,1,199,43) Command: MLSD Error: Connection timed out Error: Failed to retrieve directory listing The strange thing is that I've set the transfer mode to active... I've called my hosting company support and they're able to connect to this server using my ftp credentials. I've also tried to connect on another machine on my network and have the same issue. Could it be the firewall? My ISP?

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  • Apply SetEnvIf after Apache RewriteRule

    - by coneybeare
    I have a working apache rewrite rule: RewriteCond %{HTTP_HOST} ^.*foo.com RewriteRule (.*) http://bar.com$1 [R=301,QSA,L] and some working dontlog SetEnvIfs: SetEnvIf Request_URI "^/server-status$" dontlog SetEnvIf Request_URI "^/home/ping$" dontlog SetEnvIf Request_URI "^/haproxy-status$" dontlog SetEnvIf User-Agent ".*internal dummy connection.*" dontlog CustomLog /var/log/apache2/access.log combined env=!dontlog but I can't figure out how to stop the RewriteRule from logging a duplicate line. foo.com and bar.com are both on the same machine. I would expect this rule to work, but it did not: SetEnvIf Host "foo.com" dontlog I still get duplicates in the Apache Log: 10.250.18.97 - - [06/Apr/2012:16:57:12 +0000] "GET / HTTP/1.1" 200 732 "-" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_3) AppleWebKit/534.55.3 (KHTML, like Gecko) Version/5.1.5 Safari/534.55.3" 68.194.30.42 - - [06/Apr/2012:16:57:12 +0000] "GET / HTTP/1.1" 200 732 "-" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_3) AppleWebKit/534.55.3 (KHTML, like Gecko) Version/5.1.5 Safari/534.55.3" .... where 10.250.18.97 is the server's IP. How can I prevent that RewriteRule from logging?

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  • outlook freezes on splash screen - loading profile

    - by sammarcow
    I have a user with a frustrating application crash issue without Outlook: Windows 7 x64 Outlook 2010 crashes on the splash screen with the message "loading profile." I have deleted the users .ost file in "..\AppData\Local\Microsoft\Outlook\" and this crash occurs for multiple users including those with administrator privileges. I have also tried running outlook at the command prompt as an admin with the /safe command-line switch. I tried the repair utility in "programs and features by clicking Change after selecting Microsoft Office:" ~~ Microsoft office failed to successfully repair your product . I tried to uninstall Microsoft Office ~~ Microsoft Office failed to successfully uninstall this product. I am trying to avoid reimaging the machine for obvious reasons. Is there anything else I can try or insight any one has on this issue?

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  • Simple HTTP server that will send the same file for all requests?

    - by Rory McCann
    I need to debug a XML-RPC application, which sends XML replies over HTTP. I have a sample XML reply (i.e. data from the server, sent to the client that isn't working), I'd like to debug my application. Ideally I'd like a simple HTTP server that will serve one file in reply to all requests. Someone requests /? Send them this file. Someone makes a post to /server/page.php with a certain cookie? Just send them this file. I don't care about multithreading, or security. I will only need to use this for a few hours to debug. I have root on the machine. i.e. I'm hoping there's something as easy to use as this: simple_http_server -p 12445 -f my_test_file I'm aware of python's SimpleHTTPServer module, but I'm not sure how to make it work in this case.

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  • Problem with alleg42.dll / program crashes / Allegro & Codeblocks

    - by user24152
    I'm having a serious problem with allegro. The program should display random pixels on the screen and when I build and run it I get the following error message: Below is the full code of my program: #include <stdio.h> #include <stdlib.h> #include <time.h> #include "allegro.h" #define Text_Color_Red makecol(255,0,0) int main() { int ret; int color_depth = 32; int x; int y; int red; int green; int blue; int color; //init allegro allegro_init(); //install keyboard install_keyboard(); //set color depth to 32 bits set_color_depth(color_depth); //init random seed srand(time(NULL)); //init video mode to 640 x 480 ret = set_gfx_mode(GFX_AUTODETECT_WINDOWED,640,480,0,0); if(ret !=0) { allegro_message(allegro_error); return 1; } //Display string textprintf(screen,font,0,0,10,0,Text_Color_Red,"Screen Resolution is: %dx%d -- Press ESC to quit !",SCREEN_W,SCREEN_H); //display pixels until ESC key is pressed //wait for keypress while(!key[KEY_ESC]) { //set a random location x = 10 + rand() % (SCREEN_W-20); y = 10 + rand() % (SCREEN_H-20); //set a random color red = rand() % 255; green = rand() % 255; blue = rand() % 255; color = makecol(red,green,blue); //draw the pixel putpixel(screen, x, y, color); } //quit allegro allegro_exit(); } END_OF_MAIN() Error message: AllegroPixels1.exe has encountered a problem and needs to close. We are sorry for the inconvenience. Error signature: AppName: allegropixels1.exe AppVer: 0.0.0.0 ModName: alleg42.dll ModVer: 4.2.3.0 Offset: 0006c05c I am using Windows XP inside a virtual machine under Parallels 7.0

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  • hMailServer Email + MX Records Configuration

    - by asn187
    Trying to make DNS changes to enable email to be sent using hMailServer. My mail server is on a separate machine with a separate IP Address. I have already added MyDomain.com and an email account I have create a MX Record with the mail server being mail.domain.com an a priority on 20. 1) But the question is how do I now link this MX record for the domain to my mail server/ mail server IP Address? 2) What changes are needed in hMailServer to complete the process and be able to send emails for the domain? 3) In Settings SMTP Delivery of email: What should my configuration here look like?

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  • Is it safe to use a single switch for multiple subnets?

    - by George Bailey
    For a moment, forget about whether the following is typical or easy to explain, is it safe and sound? Internet | ISP supplied router x.x.x.1 (public subnet) | switch-------------------------------------+ | (public subnet) | (public subnet) BVI router (switch with an access list) NAT router | (public subnet) | (private subnet 192.168.50.1) +--------------------------------switch----+ (both subnets) | | computer with IP 192.168.50.2 ------+ +----computer with IP x.x.x.2 I don't plan to implement this setup, but I am curious about it. The 50.2 computer may send a packet to the x.2 computer, but it will use 50.1 as the router, since 50.2 knows that the subnet is different. Would this result in the packet being received twice by the x.2 machine, first directly through the switch, second by way of the two routers? Do you see any problems with this aside from how confusing it is, and that it would put one switch doing the work of two subnets?

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  • Unable to create a Windows 7 system image of a failing hard drive

    - by Rahul
    The hard disk of my one year old T400 Thinkpad has started failing periodic hardware tests. I get a "Targeted Read Test Failed" error. The "SMART short self test" times out. I am now trying to create a Windows 7 System image of the hard disk but it fails without giving any specific error messages. I tried using Comodo Backup but got an error (code 101117) there as well. I have copied the important files in Dropbox but would like to take a full System backup as I have plenty of software installed on the machine. Does anyone know why this is happening and how I can take a backup of the system image ?

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  • VirtualBox VM settings between different CPUs (Processor/Acceleration)

    - by Level1Coder
    I have 2 PCs, 1 with a INTEL-Q9550 (YES-VT-x) and another with INTEL-E2160 (NO-VT-x) I will be using the Q9550 first to create a new VM, install XP and install stuff I'll need. Once this VM is golden, I plan on migrating this VM over to the E2160 machine. The question is, while creating/preparing this VM on the Q9550, should I disable all the following settings below to make sure the E2160 can start this VM without errors? Q9550 Default VM Settings ========================= PROCESSOR [X] Enable PAE/NX ACCELERATION [X] Enable VT-x/AMD-V [X] Enable Nested Paging

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