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• How can a cloud be created from virtualization or how is it different from virtualization?

  - by Echelon

  I have heard that virtualization is the basis of Cloud,so If i have a machine with xen as virtualizing environment and many vms running on it,then can that be called as a cloud. Is it true that vms that scale based on load and memory is called cloud and vms that do not scale is called as just virtualization! How can a vm scale??Based on my understanding for xen once we fix cpu and ram,it cant go beyond that (am aware of Dynamic memory Management) so how it really scale?.Can any one please clarify this

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• Running two graphics cards (non-SLI) to power 3D on two different monitors?

  - by Delameko

  Hi, I'm a bit clueless about this, so excuse my naivety. I have two video cards, a Nvidia 8800 and a GT120, powering three monitors. I run two 3D game instances (two Everquest 2 clients), one on each of my first two monitors. It's been running fine, although sometimes it sounds like the computer is trying to take off. Today I realised that I was actually playing them on the two monitors that are both powered by the 8800. Thinking that I might as well make use of the power of both cards I tried switching the monitor cables over so that each card would be "powering" one of the clients. (Is it silly to assume this is how it works?) This doesn't seem to have had the desired effect, as the client running on the 8800 screen is running worse than it was before. Is it even possible to run two clients on separate GPUs? Is SLI the only way to utilise 2 GPUs? Is there something special I have to do? Or do I have to set the client to use a particular GPU (an option I can't seem to find in EQ2)? I run the clients in window mode if that makes any difference, and I'm running Win 7. Thanks.

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• How (in terms of which parameters) is a "professional-grade" broadband connection different from a "consumer" one?

  - by odemarken

  By "professional" I mean here: The kind you can get at a datacenter for your server The kind you can get at an office that would be good enough for hosting web and mail server with low to medium traffic. (Please ignore other aspects of "the self-hosting problem" and focus only on broadband connection quality). Another way to frame this question would be "what parameters should office broadband have to compare to a datacenter-provided one for the purposes of self-hosting". The knowledge I have gathered so far is in answer format below.

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• WPF: In Expression Blend, how to change Foreground of a custom button with a Border on different states?

  - by SubmarineX

  In Expression Blend 4, I want to change the Foreground of a custom button on different states. I'm just able to change the Background and BorderBrush. Just like this: If the state is "Normal", the color of text "Button" is Black, while the state is "Pressed", the color of text "Button" is White. On Brushes Panel under Properties Panel, there're 3 properties but no Foreground property: Who can help me? I'm so perplexed. Edit I find ContentControl have a Foreground property, but ContentPresenter haven't. Wether I should use ContentControl instead of ContentPresenter?

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• Split a string and join it back together in a different order?

  - by Xaisoft

  What is the most concise, yet readable way to split a string and put join it back together in a different order. For example, I want to split the following string: 10-20-30-4000-50000 and I would do this via: string[] tokens = original.Split('-'); and now I want to put it back together in this order: 30-20-10-4000-50000 I know I can use Join to put it back together in it's original form, but I don't want that. The only thing I can think of right now is: string modified = string.Format("{0}{1}{2}{3}{4}",tokens[2],tokens[1],tokens[0],tokens[3], tokens[4]); I realized that if I do: string modified = string.Format("{2}{1}{0}{3}{4}", tokens); it does not keep the dashes which is what I want so is to do that, should I just do: string modified = string.Format("{2}-{1}-{0}-{3}-{4}", tokens);

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• How can I find all the trunks from several different Subversion servers?

  - by SylanderXS

  We have many SVN Repo's but many of them have nested projects. I need some way of finding the trunk directories only and creating a list of them. So, the svn path to trunk might be svn://svnserver/repos/myproject/trunk or it might be svn://svnserver/repos/myproject/mysubproject/trunk I need to generate a list of /trunk directories from several different servers. Is there a method for doing that? Has anyone seen a script (sh, perl, whatever) for doing something similar? I just need a hint on how to get started.

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• How to use English Microsoft Speech Recognition of windows 7 in a different language windows?

  - by aF

  Hello, I've installed windows 7 home in portuguese and now I don't have the speech recognition. How can I had that to my 'arsenal' ? Thanks in advance!

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• Dual monitors on Windows - How do I set a different DPI or text size on each monitor?

  - by dlux

  My laptop is a 15" wide screen running at 1600x1050, and in addition to that I connect an external 19" LCD which runs at 1280x1024. The problem with this setup is that if I increase the text size to make the laptop screen readable, the text on the external LCD is huge. Normal text on the LCD results in tiny text on the laptop. What options do I have to get around this? I'm using Windows 7 and the laptop is a ThinkPad T61 with an nVidia NVS 140M video chipset. I cannot find any per-display setting in Windows or the nVidia control panel to resolve this.

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• Compare cells in two different spreadsheets and extract data from one an place it in the other if match found

  - by Fergie

  I need to find a way to compare two spreadsheets and if there is a match on specific cells, pull data from one sheet to another. Say the two spreadsheets contain a value that identifies a piece of equipment: spreadsheet 1 spreadsheet 2 Server Server Serial # 123abc 123abc 123-xx-456 There are of course many, many records/rows in each sheet. I need to look at the first cell in the server column of sheet 1 and then search a range of cells in the sever column of sheet 2 for a match. If there is a match, I need to pull the serial # value from the cell in the matching row an put it into the serial # cell of the matching row in sheet 1 (all of the "serial #" cells in sheet 1 are presently empty.) If that description explaination is too convoluted I can explain by answering any questions you may have. My deadline for this task is Noon tomorrow, 30 Aug 2012. Yes, I got the task today at noon.... I am not an Excel user and just get thrust into it on occassion... Any help would be a huge assist.

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• Is is possible to to make several different IP point to the same machine?

  - by apache

  If the answer is possible,how? DNS is not for this kind of job,obviously.

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• Can I set osx to boot with several spaces containing a different set of apps in each?

  - by Jay

  When my system boots I would love to have it to create three spaces: First Space: email and things (my to do list program) Second Space: textmate and a browser containing first site I am developing Third Space: textmate and a browser containing my second site Is it possible to set it up to do that each time? I'd prefer not to use the reopen windows option on shutdown because most days I have a bunch of things open that I won't need the next day. Thanks. UPDATE: I found TotalSpaces2 and it will open all the same spaces when I reboot. I suppose that I might need some kind of hack to get the applications to start in the appropriate space at boot.

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• How to run multiple Nginx instances on different port...

  - by Edvinas

  Hi, I would like to have several Nginx instances running on my server on separate ports (for example one user runs Nginx on port 2345, and another user on port 2346). So far, I have been successful in compiling and running the server on their designated ports. However, I am running into a weird issue: If i visit domain1.com:2345 or domain2.com:2346 I get the correct (200) response but if I visit domain1.com or domain2.com (without specifying the port) I get no response at all. Any help/clues in figuring out how to set this up would be highly appreciated.

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• Can I get.seed() somehow?

  - by a different ben

  In reference to the statement set.seed(), can I get the seed instead after running some code if I didn't set it explicitly? I've been re-running some code containing a function that randomises some sample of the input data (the function is part of the kohonen package). After playing with it for some time to see the variety of output (it was an 'unstable' problem), I noticed one result that was pretty interesting. I of course had not used set.seed(), but wondered if I could get the seed after running the code to reproduce the result? In ?set.seed I see .Random.seed saves the seed set for the uniform random-number generator But I don't know how that helps.

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• Why can I not have two SocketServers bound to two different ports in the same application?

  - by uriDium

  I am using .Net 3.5 and Windows XP not sure if any more information is needed. I have an application that creates a socket, binds to a port and starts listening. A client comes and connects and then disconnects no problem. It can then reconnect no problem. If I have to sockets each listening on a different (e.g. 50 000 and 55 000) then it will accept the connection but it will not allow a reconnect. I will post source code if needed but I am assuming that it is just something simple that I am not catching.

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• EntityFramework 4.0: can you return different types depending on data in the database?

  - by user200341

  I have a Media table in the database. I also have an IMedia interface. I have two different media types that implements the same interface: 1) AudioMedia 2) PictureMedia What I wonder here, is if I can use EntityFramework (I'm using an EDMX file but I have my models in a separate library, with automatic code generation turned off), and depending on the data in the database, select what type to get (AutioMedia or PictureMedia). Since they are both implementing the same interface (could be changed to an abstract class if needed I suppose), I'm thinking that somewhere along the way you could specify what class it should be. I should perhaps point out that I have a class that inherits from ObjectContext to access the objects. Perhaps there is something that that can be done?

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• How to get apache to look for files in different subfolders folders?

  - by prb

  I am definitely new to mod-rewrite stuff. Note:- here the URL is common, and all the folders and subfolders on same host. The url a user uses to access their page is http://myurl.com/1234/filename.jpg Here the name of the subfolder is an integer is unique and generated dynamically by another application. The subfolder stores images specific to an individual user. So the folder structure is as follows main1 = document root main2 is another folder within main1 or document root. /main1/1234/filename.jpg /main1/5678/filename.jpg /main1/2345/filename.jpg /main1/1212/filename.jpg /main1/main2/2367/filename.jpg /main1/main2/8790/filename.jpg /main1/main2/9966/filename.jpg So, I want to write a rewrite a rule so that if a user tries to type in http://myurl.com/1234/filename.jpg, the rewrite rule will need to look where the file is and serve the request; so for request http:/myurl.com/1234/filename.jpg the actual page is located at /main1/1234/filename.jpg and then need to serve that page from that folder. So, if another users makes a request as http://myurl.com/9966/filename.jpg, it should serve the page from the following destination /main1/main2/9966/filename.jpg Please let me know if the question is still not clear. This is what i have done so far and does not work at all. RewriteCond {DOCUMENT_ROOT}/%{REQUEST_FILENAME} -f RewriteRule ^(.*)$ {DOCUMENT_ROOT}/$1 [L] RewriteCond {DOCUMENT_ROOT}/main2/%{REQUEST_FILENAME} -f RewriteRule ^(.*)$ {DOCUMENT_ROOT}/main2/$1 [L] any help is really grateful

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• How to make the first invocation of a macro different from all the next ones ?

  - by LB

  Hi, that may be really simple but i'm unable to find a good answer. How can I make a macro representing first a certain value and then a different one ? I know that's nasty but i need it to implicitly declare a variable the first time and then do nothing. This variable is required by other macros that i'm implementing. Should i leverage "argument prescan" ? thanks for the answers. EDIT To make things clearer. Suppose i have a macro FOO, and I do something like FOO FOO FOO I would like the result to be foo bar bar I don't want the actual code to be cluttered by ifndef. The programmer should only have to write macro invocations.

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• Can I have different name and id attributes on a form element?

  - by ewitkows

  Hi all, I have a web form with usual elements (first name, last name, etc). The Postback URL is a different website altogether as the form is intented to post lead information to another website. The site that accepts the lead is expecting First Name to come over as "FName", and Last Name to come over as "LName". Is there any way I can set the ID of a textbox to "txtFName", but submit it over the wire as "FName"? I tried changing the name attribute, but at runtime it sets the name = id.

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• How do I reference a pointer from a different class?

  - by Justagruvn

  First off, I despise singletons with a passion. Though I should probably be trying to use one, I just don't want to. I want to create a data class (that is instantiated only once by a view controller on loading), and then using a different class, message the crap out of that data instance until it is brimming with so much data, it smiles. So, how do I do that? I made a pointer to the instance of the data class when I instantiated it. I'm now over in a separate view controller, action occurs, and I want to update the initial data object. I think I need to reference that object by way of pointer, but I have no idea how to do that. Yes, I've set properties and getters and setters, which seem to work, but only in the initial view controller class. Peace Love applesauce.

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• Can a SQL Server 2008 database support both a REST and SOAP web services within two different endpoints?

  - by PaulDecember

  Say you have a SQL Server 2008 database. You build a SOAP web service. You then deploy or publish this using Visual Studio 2010 in one website. Now, using the same database, you build a REST web service, in a different solution. You deploy this on another website. Can you consume the endpoints and/or .svc file of both the SOAP and REST web services, though they reference the same SQL Server 2008 database? I don't see why not, but before I go down this path and spend days I'd like to make sure. Also if there's a performance hit to the database if it is running both SOAP and REST at the same time--again, I don't see why it would matter, but I must make sure. Thanks.

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• What Happens if i create a byte array continuously in a while loop with different size and add read an stream into it?

  - by SajidKhan

  I want to read an audio file into multiple byte arrays , with different size . And then add into a shared memory. What will happen if use below code. Does the byte array gets over written. I understand it will creat multiple byte array , how do i erase those byte arrays after my code does what it needs to do. int TotalBuffer = 10; while (TotalBuffer !=0){ bufferData = new byte[AClipTextFileHandler.BufferSize.get(j)]; input.read(bufferData); Sharedbuffer.put(bufferData); i++; j++; TotalBuffer--; }

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• is it possible to use multiple proxies for different target websites?

  - by fduff

  Typically I'd like to know if it's possible to have a setup where it maps some IPs with a particular proxy and other IPs using another proxy? Proxy Chaining isn't really what I'm looking for (well I don't think it is) because each address could be resolved with or without a proxy but their content may not be accessible without the right proxy. This setup could be part of home network, so that the relevant proxy s/w could be installed and setup on a Linux box for ex. Ex: website-A via proxy-1 website-B via proxy-2 all others via no-proxy

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• Can different drive speeds and sizes be used in a hardware RAID configuration w/o affecting performance?

  - by R. Dill

  Specifically, I have a RAID 1 array configuration with two 500gb 7200rpm SATA drives mirrored as logical drive 1 (a) and two of the same mirrored as logical drive 2 (b). I'd like to add two 1tb 5400rpm drives in the same mirrored fashion as logical drive 3 (c). These drives will only serve as file storage with occasional but necessary access, and therefore, space is more important than speed. In researching whether this configuration is doable, I've been told and have read that the array will only see the smallest drive size and slowest speed. However, my understanding is that as long as the pairs themselves aren't mixed (and in this case, they aren't) that the array should view and use all drives at their actual speed and size. I'd like to be sure before purchasing the additional drives. Insight anyone?

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• How to manage reports/files distribution to different destinations in Unix?

  - by mossie

  The reporting tools will generate a huge numbers of reports/files in the file system (a Unix directory). There's a list of destinations (email addresses and shared folders) where a different set of reports/files (can have overlap) are required to be distributed at each destinations. Would like to know if there's a way to efficiently manage this reports delivery using shell scripts so that the maintenance of the list of reports and destinations will not become a mess in future. It's quite an open ended question, the constraint however is that it should work within the boundaries of managing the reports in a Unix FS.

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• [VB.NET] Same name methods in different modules cause ambiguity.

  - by smwikipedia

  I have 2 modules. Each contains a Sub with the same name. See below: Module moduleA Public Sub f(ByVal arg1 As myType) Console.WriteLine("module A") End Sub End Module Module moduleB Public Sub f(ByVal arg1 As myType, ByVal arg2 As Boolean) Console.WriteLine("module B") End Sub End Module But the compiler complains that there's ambiguity between moduleA and moduleB. How could this be? I have totally different signatures. However, if I put the 2 methods into the same module, there's no ambiguity at all. Could someone tell me why? Many thanks.

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