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• How do I reduce RAM usage on my server?

  - by Abs

  I have recently launched a site that is very popular but I am having trouble with scalability. My site makes heavy use of FFmpeg and at peak times RAM usage hits the 2 GB point quickly and the swap file starts getting used. CPU usage starts rising too. Users complain that the site is slow. They say this because all FFmpeg instances run very slow because of the number running at the same time. Users make use of FFmpeg on my server in real time. Is there anything I can consider or do to ease down the usage of the server and RAM just shooting up? Maybe there is something better than FFmpeg (!). Is the only solution "throwing some cash" at a more powerful server? I have given little information, please ask for more, so this problem can be solved.

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• Am I supposed to assign the broadcast IP somewhere?

  - by pvieira

  This is a very basic question from a newbie point of view. I have a dedicated server at Hetzner running Windows 2008 R2. I bought a subnet of IP addresses to use in this server. They provided me a given range of IPs, incluind one Ip labeled as "Broadcast". I know how to assign those IPs to the NIC, but should I do something with the Broacast IP, like configure it somewhere on Windows? Or can I just ignore it and I'll be fine? This IP range will be used to host SSL sites.

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• Why does my flash video get stuck? (not lag?)

  - by Sk606

  After moving to Ubuntu 10.10 Netbook Edition, I've noticed a strange problem that manifests itself most obviously with streaming videos like youtube and hulu. The video will load and begin playing fine and eventually stop, as though it is buffering. However, it usually happens between 40 and 60 seconds into the clip. The loading indication however shows that it actually isn't buffering anymore of the data, and will just sit there. If I force the clip forward (e.g. click to start the movie somewhere ahead of the stall point) the clip will usually reload quickly and begin playing as expected. Because of the quick load times, and the consistent stop of video, I don't think the problem is related to hardware performance or network throughput. Also, I have none of these problems in 10.04. Rebooting into 10.04 makes the problem disappear. However, one more clue, I also have noticed a higher occurrence of web pages that simply "stop loading" - say, 1/10 clicks while browsing I have to hit "reload" to get the page to load because the page timed out part of the way through. This seems strangely related to the video problem, though is a lot less infuriating. Help! Where do I begin to look with a problem like this?

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• decouple software components via nameconvention

  - by csteinmueller

  I'm currently evaluating alternatives to refactor a drivermanagement. In my multitier architecture I have Baseclass DAL.Device //my entity Interfaces BL.IDriver //handles the dataprocessing between application and device BL.IDriverCreator //creates an IDriver from a Device BL.IDriverFactory //handles the driver creation requests Every specialization of Device has a corresponding IDriver implementation and a corresponding IDriverCreator implementation. At the moment the mapping is fix via a type check within the business layer / DriverFactory. That means every new driver needs a) changing code within the DriverFactory and b) referencing the new IDriver implementation / assembly. On a customers point of view that means, every new driver, used or not, needs a complex revalidation of their hardware environment, because it's a critical process. My first inspiration was to use a caliburn micro like nameconvention see Caliburn.Micro: Xaml Made Easy BL.RestDriver BL.RestDriverCreator DAL.RestDevice After receiving the RestDevicewithin the IDriverFactory I can load all driver dlls via reflection and do a namesplitting/comparing (extracting the xx from xxDriverCreator and xxDevice) Another idea would be a custom attribute (which also leads to comparing strings). My question: is that a good approach above layer borders? If not, what would be a good approach?

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• Proxy between data centers [closed]

  - by dstarh

  Possible Duplicate: Can IIS be configure to forward request to another web server? We are switching data centers (actually datac-center to EC2 to be specific) and some customers have not yet made DNS changes to point the domains to the new load balancers. We are thinking of leaving the existing servers up and just using a proxy server to forward the request to the new load balancer. Can anyone recommend a good proxy server for doing this I've got squid installed but it seems it's fairly easy to just have a fairly wide open proxy server and we don't want this. I want all requests coming in on port 80 to be sent to port 80 at a specific domain (elastic load balancer) the data center env is windows 2k3 and the EC2 env will all be linux but the ec2 env should be irrelevant

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• Subdomain returns error when restarting Apache

  - by xXx

  I try to install a subdomain on my dedicated server. I made a new DNS rules to point my sub domain to the IP of my serv. After reading this Subdomain on apache i tried to add new rules on Apache : NameVirtualHost *:80 <VirtualHost *:80> ServerName tb.mysite.org DocumentRoot /home/mysite/wwww/tb/ <Directory "/home/mysite/wwww/tb/"> AllowOverride All Allow from all </Directory> </VirtualHost> Then i restart Apache but it returns sudo /etc/init.d/apache2 restart * Restarting web server apache2 Warning: DocumentRoot [/home/mysite/wwww/tb/] does not exist [Wed Jun 27 10:32:58 2012] [warn] NameVirtualHost *:80 has no VirtualHosts ... waiting Warning: DocumentRoot [/home/mysite/wwww/tb/] does not exist [Wed Jun 27 10:32:59 2012] [warn] NameVirtualHost *:80 has no VirtualHosts the tb/ folder is existing, don't why Apache can't find it... And it says that NameVirtualHost:80 has no VirtualHosts...

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• Finding documentation for /etc/**/*.dpkg-*

  - by intuited

  During upgrades, files with these extensions appear in /etc and its subdirectories. I gather that *.dpkg-dist contains the file that was distributed with the currently-installed version of a package, and *.dpkg-new contains the version from the version being installed, however I'd like to see the docs to be sure that I'm getting it right. Also there are occasionally other similarly named files, eg *.dpkg-original, and I'd like to be able to read up on these. I've checked /usr/share/doc/dpkg for documentation on this, and come up empty; there's no dpkg-doc package; Google doesn't have anything except unanswered questions. Can someone point me to the documentation for this aspect of debian package management?

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• How to Program AWS Spot Instances to Strategically Bid So the Auction is Never Lost Until a Competitor Beats the Maximum I'm Willing to Pay?

  - by Taal

  I believe I'm in the right section of stack exchange to ask this. If not, let me know. I only use Amazon Web Services for temporary type hosting services, so the spot instances are quite valuable to me. I would also just make an instance and start and stop it - but - that doesn't necessarily fit my bootstrapped budget sadly. Anyways, it really kills me when someone outbids me on a spot instance I have (I tend to go for the larger ones which there are fewer of available) and I get randomly kicked off. I know or at least I believe there is a way to program in something somehow to dynamically change your bidding price to beat a potential competitor's if their's is higher than yours. Now, I previously believed Amazon would just charge me for the highest price right above the next lowest competitor automatically (eliminating the need for this) - so if I bid too high, then I only pay what I would of needed to in order to win and keep the auction. Essentially, I thought my bid price was my max bid price. Apparently, according to my bills and several experiments I've done - this is not the case. They charge me for whatever I bid even when I know there is no one else around to counter bid me. I needed to clarify that, but let me get back to the main point: Let's say I'm bidding $0.50, competitor comes in and bids 0.55 cents. I get kicked off. I want to have it to where I'd set a maximum I'm willing to pay (let's say $1.00 here), and then when competitor comes in and tries to bid $.55, my bid is dynamically adjusted to beat his at $0.56 up until he breaks my $1.00 threshold. I've been reading the guides and although they are more or less straightforward, I feel like they leave a few holes in them that end up confusing me. Like, for instance, where do I input said command or when do I do it? Maybe I'm just tech illiterate and need help deciphering these guides. A good start for someone willing to answer/help me decipher this problem would be here: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/spot-as-update-bid.html

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• Amazon EC2 - Reserved Private Addresses

  - by reach4thelasers

  I've got a private DNS Server running on Amazon EC2. I don't need a public IP Address because its only used for private addressing web1.xxx.internal database1.xxx.internal Problem is I had to terminate the instance recently and start a new one. This meant that the private IP address of the DNS server changed and I had to log in to each of my other 15 server one-by-one and change the DNS address to point to the new DNS server. There must be a better way to do this, if so, what is it?

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• Split up a screen into regions

  - by nexen

  My task: I want to split up a screen into 3 regions for buffs-bar (with picked items), score-info and a game-map. It doesn't matter are regions intersect with each other or not. For example: I have a screen with width=1; height=1 and the origin of coordinates (0;0) is the left bottom point. I have 3 functions: draw items, draw info, draw map. If I use it without any matrix transformations, it draws fullscreen, because it's vertex coordinates are from 0;0 to 1;1. (pseudo-code) drawItems(); drawInfo(); drawMap(); And after that I see only map onto info onto items. My goal: I have some matrixes for transformation vertexes with 0;0-1;1 coordinates to strict regions. There is only one thing, what I need to do - set matrix before drawing. So my call of drawItems-function is like: (pseudo-code) adjustViewMatrixes_andSomethingElse(items.position_of_the_region_there_it_should_be_drawn, items.sizes_of_region_to_draw); setItemsMatrix(); drawItems(); //the same function with vertex coordinates 0;0->1;1, //but it draws in other coordinates, //because I have just set the matrix for region I know only some people will understand me, so there is a picture with regions which I need to make. Every region has 0;0 - 1;1 inner coordinates.

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• SEO Blog Indexing : Dot Wordpress Versus a Registered Domain?

  - by rumspringa00

  I've used Wordpress for a few of my client's sites, mostly small businesses and ecommerce sites. I have found through Google Analytics as well as the All in One Webmaster plugin that when it comes to social media, using Wordpress is a surefire way of getting your site indexed by Google and occasionally Bing and Yahoo. Since I am a heavy WP user, I'd like to contribute by registering a dot Wordpress domain for my portfolio. When using a WP installation concurrently with a WP domain, e.g. myportfolio.wordpress.com, will the site be more or less likely to be indexed rather a generic myportfolio.com domain? I've seen mixed opinions where people seem to favor a WP domain for URL output where others say that it's a moot point, and that Google will not favor a WP domain over a dot com domain as long as your meta tags are updated and content is keyword optimized. I tend to disagree and believe a WP domian would more likely be indexed and output more URLs over an individual, laconic domain like myportfolio.com. Am I wrong? Thanks in advance!

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• Lock manager stops responding (lockd/nfslock), but shows as running

  - by dwaynehoov

  Essentially, lock manager stops responding (lockd/nfslock), but shows as running as a kernel process. If I bounce portmap and nfslock, it has no effect. Doesn't show up in the portmapper registered services rpcinfo -p .. doesn't show nlockmgr. it just shows portmapper and status If I manually remount the drives, it fixes the issue. I'm assuming that the service (lockd) goes stale or hangs when there is no NFS activity? It seems like issuing a mount for NFS volumes "awakens" it and things work once that happens. Please help me nail this down for point me to somewhere to get more information on what might be happening. System info: Linux xxx.yyy.com 2.6.32-300.38.1.el5uek #1 SMP Thu Oct 18 11:51:13 PDT 2012 x86_64 x86_64 x86_64 GNU/Linux cat /etc/redhat-release Red Hat Enterprise Linux Server release 5.8 (Tikanga) cat /etc/oracle-release Oracle Linux Server release 5.8 Thanks

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• Why does my system slow down or freeze when there is heavy disk activity?

  - by user72270

  Im a first-time user to Ubuntu-12.04 with WUBI installation. My NoteBook Information : Dell vostro 3450 : i5 2410m, 3 gb ram, intel hd3000, amd 6630m hybrid. Surfing and playing games works flawlessly, however, I'm having huge problems when installing applications and generally copying and moving files. When doing so, system is significantly slower and freezes quite often (Firefox gets bluish, sometimes even black n white). I would say that Ubuntu allocates too much resources on file transfers and installing, but even these tasks are very slow. Here is very specific example : today, i tried to move 6 GB file from win 7 installation. It was good at first, i jumped to firefox but after a while firefox started to randomly turn bluish and mouse was randomly stopping working. It was gradually worse and worse and it got to a point when firefox black n whited and mouse wasn't working at all. I raged and went for some meal, when i got back screen was black. It probably unlogged me due to inactivity, when i pushed random button to bring screen to life i had to wait few minutes to let it show me only my screen background. No log in screen, just background and working mouse. NoteBook fan was working at 100 % so I assumed that file transfer was going on and I left it to work. Nothing then changed for a full hour so I hard rebooted it. File transfer unsuccessful, It transfered hardly 2 gigs. Is this normal ? What to do in these situations ? It didn't let me load system manager and not even terminal. Thanks.

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• creating a subdomain on windows server

  - by jason

  Hi I'm trying to set up a sub domain for development on a windows server and am having problems setting the correct details in the httpd.ini file and hoped soemone could help. I have set up the subdomain http:// dev. website .com The files that I want to use for this subdomain are on the server in a folder called development http:// www. website .com /development in the directory structure they are in /htdocs/development What do I need to add the the httpd.ini file to point the http:// dev .website .com to file files located in the /htdocs/development folder on the server? Many Thanks

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• Can I share data between two users in an ASP.NET Application?

  - by Dave

  I have an issue with Roles.IsUserInRole function. It take hell amount of time to just check if the logged-in user is in particular role(typ 3-9 sec). I searched to find a solution and arrived on this but I am not sure If I have fully grasped it. What I got from the above, A new derived class is created. Inside that class, there is a list which retrieves all user at once. The next time you check IsUserInRole, you do not use the actual IsUserInRole method but rather use the one you overrode in your class. Is this the correct description? Am I on track? My question is, can data be share between two different users in ASP.NET application? If yes, will the shared data exist only if there is at least one user logged in. If all users logs out, that shared data is destroyed? My point is this data will be created only one time whenever a user logs in. For all subsequent users they can use this data and check their roles against the list? I need a detailed answer. My application has users and different roles. We are using ASP.NET roles.

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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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• Need to include Calendar and Email in own CRM system. Whose?

  - by PurplePilot

  I am writing a web based application that needs to have some elements of CRM in it but I cannot use an of-the-shelf CRM to do what I want. (Honestly we have been through it all and it will not work). Now while Tasks, Calls, Meetings and Notes are straightforward the idea of reinventing Mail and Calendars seems a waste of time and effort and also unproductive as most users already have their own and it simply adds to the complexity of my application and hacks users off. My thoughts are going around using Outlook and or GMail/iCal and or Mac Mail/iCal and or Thunderbird and importing the relevant data or if possible integrating it into the application. Any thoughts? Anyone got any experience of this can point me in a few directions. N.B. Not looking for an answer as too complex just some pointers and thoughts. Thanks. p.s. We did look at Sugar CRM as the basis for our project and it is useful to get best practice from but as I say it was not useable due to how we are structuring our software, not Sugar's fault.

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• how to actually install PHP etc on a windows 2003 server

  - by user1624421

  We're just purchasing a dedicated windows 2003 server (in fact I think it's a VPS) How do we actually go about installing software on to it? Simply searching for "installing PHP5 on windows server" just produces material about installing it as if one had access to the computer with a keyboard and mouse. Am I being thick? I've had experience managing a linux server before but that had everything pre-configured and we accessed it via Web Hosting Manager. I don't get the actual concept of connecting to a remote PC and...downloading files? If there's any good books available please point me in the right direction.

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• Does the .NET Framework need to be reoptimized after upgrading to a new CPU microarchitecture?

  - by Louis

  I believe that the .NET Framework will optimize certain binaries targeting features specific to the machine it's installed on. After changing the CPU from an Intel Nehalem to a Haswell chip, should the optimization be run again manually? If so, what is the process for that? Between generations here are some notable additions: Westmere: AES instruction set Sandy Bridge: Advanced Vector Extensions Ivy Bridge: RdRand (hardware random number generator), F16C (16-bit Floating-point conversion instructions) Haswell: Haswell New Instructions (includes Advanced Vector Extensions 2 (AVX2), gather, BMI1, BMI2, ABM and FMA3 support) So my, albeit naive, thought process was that the optimizations could take advantage of these in general cases. For example, perhaps calls to the Random library could utilize the hardware-RNG on Ivy Bridge and later models.

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• Excel - Reuse a trend line to apply to other data

  - by milko

  I've obtained a trend line from a particular set of data. What I'd like to do now is to reuse this trend line to predict values from a given pair (x,y) of coordinates. To put it another way, I have one pair (x,y) that I know is correct for sure. I don't know any other point. Let's assume the behavior of this new set is similar to the one I've got the trend line from. Is there any way Excel could compute other points following this trend line?

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• Is it possible to stream music/video from an Apache server?

  - by rphello101

  I'm just starting to get into setting up a server. I've set up a basic Apache server to access some songs and movies. When I click one of the songs though, nothing happens. When I click one of the movies, sometimes it will open a new web page and act as though it is going to start playing, but never does. I know Apache is HTTP, not FTP and read somewhere that that could be a problem, but I'm uncertain of the differences. Anyway, is it possible to click on one of the songs and have it start streaming using, for example, Windows Media Player? If so, might someone either explain how to do so or direct me to where I can find it? Any information on retrieving media from an Apache server at this point would be most appreciated. -Edit- I don't know if it matters, but I'm using Windows 7 and Google Chrome

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• rsync invocation to replace symlinks pointing to source?

  - by bdbaddog

  Currently I'm moving a big filesystem to a new server as the original fileserver is no longer able to handle the filesystem writes. To make this quick I made symlinks at the target filesystem pointing to the original filesystem. Initially: /company/release (mountpoint of the original filesystem) After migration: /company/release.old (points to original filesystem after automount map update) /company/release (points to new fileserver/filesystem after automount map update) In /company/release there are symlinks like the following: /company/release/product-1.0.tar.gz - /company/release.old/product-1.0.tar.gz /company/release/product-1.0 - /company/release.old/product-1.0 (this is a tree of files) Using symlinks allowed me to move the writes to the new filesystem quickly. Now I'd like to slowly migrate the existing files and directories to the new filesystem. The problem I'm running into is that since the symlinks point back at the original files rsync doesn't see any difference and so it doesn't actually copy the file(s) or directory(s) and remove/overwrite the symlinks. Is there a set of rsync flags which will do what I want?

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• Ubuntu installer shows three small screens

  - by Sylan

  I'm trying to install Ubuntu (or Kubuntu, which I tried first) 13.04 on a new laptop. I need the install in UEFI mode in order to properly dual boot with Windows 8. I've managed to overcome most of the UEFI issues up to the installer, which appeared as a black screen until I used nomodeset. Now the installer will appear, however it does fit my screen size. Instead, it appears as three small identical screens across the top of the monitor. I thought the problem could be solved by changing the display resolution in GRUB via changing the vga number, but this simply expanded the width of the three screens. While I could install it at this point, the identical screens are too small for me to be able to read the installer. As well, the "Try Ubuntu" option simply gets stuck at a black screen. I'm afraid these problems may persist through the installation if I attempted to continue. Additional information: The laptop is a Lenovo Ideapad Y580 with an i7 3630qm processor, and a GeForce GTX 660m graphics card which works alongside an Intel HD 4000 integrated card via Optimus.

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• Visual Studio 2010 locking referenced Assembly

  - by cunningdave

  I have a sandbox app that is built from the simple WPF Application template. This sandbox references an assembly that I am also building which contains the definition of a UserControl (WPF). I am instantiating this user control in the sandbox, to test the control's behaviour. The point of all this is to speed up development. This worked fine, but recently the .Vshost.exe paired with the sandbox process won't shut down. This prevents me from recompiling the Controls library, though ironically I can recompile the sandbox application. I can't kill the vshost process with Task Manager... only restarting VS2010 will clear it out. But every time I run the application from VS, the process just hangs there, blocking my workflow. I'm at a loss. Any ideas what could be causing this? Or does someone have any proposed workaround (mega-kill switch, perhaps?)

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• Windows file Sync

  - by Deane Venske

  So I have a big problem at the moment. Trying to find a reliable solution for syncing 2 windows IIS servers. I need to keep the web content imaged on both. Now I have been trying to use Rsync to this point, but unfortunately file permission errors are a nightmare to manage this way. I'm testing out dropbox, but the performance sucks. I'm more familiar with Linux stuff and I've used Rsync in the past but isn't there a native windows solution that will work?

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