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• 1 Zettabyte Is Equal to 1 Million Petabytes

  - by Gopinath

  Geeks recently coined a new English term, Zettabyte, to measure the rapidly growing digital information footprint. So what is a Zettabyte? A Zettabyte is equal to 1 million Petabytes or 1 trillion terabytes and 1 quadrillion gigabytes. Symbol To Represent Zettabyte According to wikipedia the symbol ZB is used to represent a Zettabyte. So we can write 10 ZB to represent 10 Zettabytes. Human’s Digital Output Will be 1.2 Zettabytes By End Of 2010 Are you wondering why do we need a term to measure digital data? Tech research firm IDC has recently published a report that estimates current digital footprint created by us so far at 8 million Petabytes – the equivalent of 8,000,000,000,000 GB. This foot print is expected to pass 1.2 Zettabytes by the end of 2010. cc image credit:flickr Join us on Facebook to read all our stories right inside your Facebook news feed.

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• How To Get a Better Wireless Signal and Reduce Wireless Network Interference

  - by Chris Hoffman

  Like all sufficiently advanced technologies, Wi-Fi can feel like magic. But Wi-Fi isn’t magic – it’s radio waves. A variety of things can interfere with these radio waves, making your wireless connection weaker and more unreliable. The main keys to improving your wireless network’s signal are positioning your router properly — taking obstructions into account — and reducing interference from other wireless networks and household appliances. Image Credit: John Taylor on Flickr How To Get a Better Wireless Signal and Reduce Wireless Network Interference How To Troubleshoot Internet Connection Problems 7 Ways To Free Up Hard Disk Space On Windows

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• How To Create Custom Keyboard Shortcuts For Browser Actions and Extensions in Google Chrome

  - by Chris Hoffman

  Geeks love keyboard shortcuts – they can make you faster and more productive than clicking everything with your mouse. We’ve previously covered keyboard shortcuts for Chrome and other browsers, but you can assign your own custom keyboard shortcuts, too. Google Chrome includes a built-in way to assign custom keyboard shortcuts to your browser extensions. You can also use an extension created by a Google employee to create custom keyboard shortcuts for common browser actions – and less common ones. Image Credit: mikeropology on Flickr (modified) Can Dust Actually Damage My Computer? What To Do If You Get a Virus on Your Computer Why Enabling “Do Not Track” Doesn’t Stop You From Being Tracked

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• Sample code and slides for my TechDays10 (Belgium) talks

  - by Laurent Bugnion

  The source code for my MVVM talk titled “Understanding the MVVM Pattern” given at TechDays 2010 in Antwerpen, Belgium, is available online. It is actually the same code than the MIX10 one, but I added the Windows Phone 7 MVVM Light application (available in the folder titled “Mix10.MvvmDemo2-End”. Note: before unpacking the zip file, you should right click on it, and select properties / Unblock. I also published the slides for my two talks: Understanding the MVVM Pattern A day in the life of a WPF/SL integrator As far as I know, the videos will be online soon, stay tuned and I will announce when it is the case. Get Started page for the MVVM Light Toolkit: http://www.galasoft.ch/mvvm/getstarted   Laurent Bugnion (GalaSoft) Subscribe | Twitter | Facebook | Flickr | LinkedIn

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• How To Remote Control Your Home Computer From Anywhere With VNC

  - by Chris Hoffman

  VNC allows you to remotely access a computer and use its desktop, either over the Internet or from another room in your house. Windows includes a Remote Desktop feature, but it’s only available in Professional editions of Windows. Some people may prefer TeamViewer or another service instead, but VNC allows you to install and manage your own server without using a centralized service. VNC clients and servers are available for all platforms, but we’ll be covering Windows here. Image Credit: photosteve101 on Flickr How To Create a Customized Windows 7 Installation Disc With Integrated Updates How to Get Pro Features in Windows Home Versions with Third Party Tools HTG Explains: Is ReadyBoost Worth Using?

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• HTG Explains: What is DNS?

  - by Chris Hoffman

  Did you know you could be connected to facebook.com – and see facebook.com in your web browser’s address bar – while not actually being connected to Facebook’s real website? To understand why, you’ll need to know a bit about DNS. DNS underpins the world wide web we use every day. It works transparently in the background, converting human-readable website names into computer-readable numerical IP addresses. Image Credit: Jemimus on Flickr How To Switch Webmail Providers Without Losing All Your Email How To Force Windows Applications to Use a Specific CPU HTG Explains: Is UPnP a Security Risk?

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• Get your picture on the screen at MIX11: Help me create a repository of sample data

  - by Laurent Bugnion

  Here is your chance to get your picture on the big screen during my MIX11 presentation in April this year. I need to create a small repository of sample data for my demos. So instead of tapping in my imagination and creating dummy users (or reusing past information I already used in other demos), I thought I would appeal to the amazing community: Send me an email with the following information. I will include the first 30 users into my sample data repository and use your info in my demo. First Name Last Name Date of birth Picture Link to Facebook profile (optional) Disclaimer: The data will only be running locally on my hard drive. The demos will however be filmed and the videos made public. By providing this information, you explicitly consent to this data being used in demos at MIX11 and possibly in following conferences. The data will only be used for demo purposes. Thanks for your help!!   Laurent Bugnion (GalaSoft) Subscribe | Twitter | Facebook | Flickr | LinkedIn

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• session indicator icon goes wrong after I upgrade to 12.10

  - by CoIn

  I upgraded my 12.04 to 12.10 yesterday, everything goes fine. But I found the little gear icon of session indicator was show incorrectly. I've re-installed the indicator-session package and changed to default theme but the problem remains. It's not a big problem but it is just annoying, hope you guys can help me! oops! I don't have enough reputation to post a image! You may move to this link to see it, thanks http://www.flickr.com/photos/flowfox/8115089204/

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• Free or cheap Media(image) hosting for web application

  - by Asish Bhattarai

  I am building a small social web application. I am developing it with rails. I want some cheap or free image hosting which I can use as my image repository for my website because I can't afford Amazon cloud store or something like that. Can I use flickr, imageshack or service something like that? Do they allow me to store images for my website? Suppose I wanna use pics for blogpost and I will be extracting pics from their api and show on my blog post. Is that possible? Sorry I'm beginner.

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• Photo sharing social platform [closed]

  - by user1696497

  I am working on a photo sharing social platform like Flickr, Photobucket. To start off with I have half a million photos as of now. I want to convert all of these into a single format, compression ratio and use it as an original image. I will be storing original image, re-sized image according to layout and a thumbnail. I have started off with ruby, didn't find supporting libraries. I am considering python as it has a good image processing library and instagram is using it. I want some advise about how the image has to be processed while uploading, efficient way of storage whether database or a file system, image compressions, and precautions to be taken. I would be having profile pictures, do I need store them separately or along with the images? If I want to store the images on a file system, which file system should I use and also should I store the url or should I use any intermediate key value store like redis?

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• &ldquo;Using the MVVM pattern in Windows 8&rdquo; in MSDN Magazine

  - by Laurent Bugnion

  These days I am swimming in Windows 8 code, and I must say it is a good feeling. This gives me the occasion to push MVVM Light and a few other components of mine to their limits, and to fix or improve a few things on the fly. All this goodness will be available in V4.1 which is scheduled shortly after Windows 8 launch. In spite of the busy schedule, I couldn’t resist writing an article for MSDN magazine about, you guessed it, the MVVM pattern and MVVM Light in Windows 8. It is an article that goes quite in depth in some of the concepts, and provides an app demonstrating how to use them. The article is available for free in the special Windows 8 edition of MSDN magazine that just came out today. Enjoy!       Laurent Bugnion (GalaSoft) Subscribe | Twitter | Facebook | Flickr | LinkedIn

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• How to use QSerialDevice in Qt?

  - by Tobias

  Hello, I am trying to use QSerialDevice in Qt to get a connection to my serial port. I also tried QextSerialPort before (which works on Windows Vista but unfortunately not on Windows XP ..) but I need an API which supports XP, Vista and Win7... I build the library and configured it this way: CONFIG += dll CONFIG += debug I did use the current version from SVN (0.2.0 - 2010-04-05) and the 0.2.0 zip package. After building the library I did copy it to my Qt Libdir (C:\Qt\2009.05\qt\lib) and also to C:\Windows\system32. Now I try to link against the lib in my project file: LIBS += -lqserialdevice I import the needed header (abstractserial.h) and use my own AbstractSerial like this: // Initialize this->serialPort->setDeviceName("COM1"); if (!this->serialPort->open(QIODevice::ReadWrite | QIODevice::Unbuffered)) qWarning() << "Error" << this->serialPort->errorString(); // Configure SerialPort this->serialPort->setBaudRate(AbstractSerial::BaudRate4800); this->serialPort->setDataBits(AbstractSerial::DataBits8); this->serialPort->setFlowControl(AbstractSerial::FlowControlOff); this->serialPort->setParity(AbstractSerial::ParityNone); this->serialPort->setStopBits(AbstractSerial::StopBits1); The problem is, that if I run my application, it crashes immediately with exit code -1073741515 (application failed to initialize properly). This is the same error I got using QextSerialPort under Windows XP (it worked with Windows Vista). If I build the QSerialDevice lib with release config and also my program, it crashes immediately but with exit code -1073741819 Can someone help me with this program or with another solution of getting a serial port to work with Qt (maybe another API or something?) Otherwise I have to use Windows API functions which would mean that my program won't work with UNIX systems.. If you have a solution for the problem with QextSerialPort under WinXP SP3, they are also welcome ;) Best Regards, Tobias

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• VSTS 2010 SGEN : error : Could not load file or assembly (Exception from HRESULT: 0x80131515)

  - by Developer IT

  Hi ! I am experiencing a strange issue with VS2010. We use TFS to build our API dlls and we used to reference them in our projects usign a mapped network drive that was fully trusted. We have been working like that for at least two years and everything worked perfectly. Today, I converted a webapp to vs2010 and when I compile it in Release, it's giving me: SGEN : error : Could not load file or assembly 'file:///L:\Api\Release API_20100521.1\Release\CS.API.Exceptions.dll' or one of its dependencies. Operation is not supported. (Exception from HRESULT: 0x80131515) The strange thing is that it's working when it's under the Debug profile... I tried adding the <runtime> <loadFromRemoteSources enabled="true" /> </runtime> into app.config and still no luck (See http://social.msdn.microsoft.com/Forums/en/msbuild/thread/d12f6301-85bf-4b9e-8e34-a06398a60df0 and http://msdn.microsoft.com/en-us/library/dd409252(VS.100).aspx) I am pretty sure that this issue is from visual studio or msbuild, as our code won't run from a network share when in prod because all the referenced dll's are copied into the bin folder. If anyone has an solution (or just an idea for a search path) please let me know !

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• WebClient on WP7 - Throw "A request with this method cannot have a request body"

  - by Peter Hansen

  If I execute this code in a Consoleapp it works fine: string uriString = "http://url.com/api/v1.0/d/" + Username + "/some?amount=3&offset=0"; WebClient wc = new WebClient(); wc.Headers["Content-Type"] = "application/json"; wc.Headers["Authorization"] = AuthString.Replace("\\", ""); string responseArrayKvitteringer = wc.DownloadString(uriString); Console.WriteLine(responseArrayKvitteringer); But if I move the code to my WP7 project like this: string uriString = "http://url.com/api/v1.0/d/" + Username + "/some?amount=3&offset=0"; WebClient wc = new WebClient(); wc.Headers["Content-Type"] = "application/json"; wc.Headers["Authorization"] = AuthString.Replace("\\", ""); wc.DownloadStringCompleted += new DownloadStringCompletedEventHandler(wc_DownloadStringCompleted); wc.DownloadStringAsync(new Uri(uriString)); void wc_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e) { MessageBox.Show(e.Result); } I got the exception: A request with this method cannot have a request body. Why? The solution is to remove the Content-type: string uriString = "http://url.com/api/v1.0/d/" + Username + "/some?amount=3&offset=0"; WebClient wc = new WebClient(); //wc.Headers["Content-Type"] = "application/json"; wc.Headers["Authorization"] = AuthString.Replace("\\", ""); wc.DownloadStringCompleted += new DownloadStringCompletedEventHandler(wc_DownloadStringCompleted); wc.DownloadStringAsync(new Uri(uriString)); void wc_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e) { MessageBox.Show(e.Result); }

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• xml parsing using nsxmlParser in iphone

  - by filthynight

  hi all, I have a problem in parsing xml from google api, the api xml looks like this ....... Now the problem is that first of all, the tags are different, like first parent tag name is "abc" and second parent tag is "efg", further more the inner tags are different as well. i have modified code got from web that it parses another url, but in this case since the tags keeps on changing it does not work. the url = "http://www.google.com/ig/api?weather=anaheim,ca" Source Code (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict{ //NSLog(@"found this element: %@", elementName); if (currentElement) { [currentElement release]; currentElement = nil; } currentElement = [elementName copy]; NSString *thisOwner = [attributeDict objectForKey:@"data"]; NSLog(@"element Name-------: %@", thisOwner); if ([elementName isEqualToString:@"forecast_information"]) //|| [elementName isEqualToString:@"current_conditions"] || [elementName isEqualToString:@"forecast_conditions"]) { // clear out our story item caches... //NSString *nm = [[attributeDict objectForKey:@"city"] stringValue]; //NSLog(@"value...%@",nm); item = [[NSMutableDictionary alloc] init]; currentTitle = [[NSMutableString alloc] init]; currentDate = [[NSMutableString alloc] init]; currentSummary = [[NSMutableString alloc] init]; currentLink = [[NSMutableString alloc] init]; [item setObject:currentLink forKey:@"postal_code"]; [item setObject:currentSummary forKey:@"current_date_time"]; [item setObject:currentDate forKey:@"unit_system"]; NSLog(@"adding story: %@", currentTitle); [stories addObject:[item copy]]; } } I have another function didEndElement where the values are assigned in the array, but i could not figure out how to assign values of an attribute. Can somebody please help me in this regards Thanks!

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• cannot load JSTL taglib within embedded Jetty server

  - by fthompson

  I am writing a web application that runs within an embedded Jetty instance. When I attempt to execute a JSTL statement, I receive the following exception: org.apache.jasper.JasperException: /index.jsp(1,63) PWC6188: The absolute uri: http://java.sun.com/jsp/jstl/core cannot be resolved in either web.xml or the jar files deployed with this application I have the following jars on the classpath ant-1.6.5.jar ant-1.7.1.jar ant-launcher-1.7.1.jar core-3.1.1.jar jetty-6.1.22.jar jetty-util-6.1.22.jar jsp-2.1-6.1.14.jar jsp-api-2.1.jar jstl-1.2.jar servlet-api-2.5-20081211.jar servlet-api-2.5-6.1.14.jar standard-1.1.2.jar My web.xml looks like this: <?xml version="1.0" encoding="ISO-8859-1"?> <web-app xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee h77p://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd" version="2.4"> <display-name>test</display-name> </web-app> My code looks like this: <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <html> <body> <h2>Hello World!</h2> <%= new java.util.Date() %><br/> ${1+2}<br/> <c:out var="${5+9}"/><br/> </body> </html> I started my embedded Jetty server like this: Server server = new Server(80); WebAppContext context = new WebAppContext("pig-1.0-SNAPSHOT.war","/"); server.addHandler(context); server.start(); I spent the past two days experimenting with various combinations of jar files, web.xml configurations, and tag library declarations, but to no avail. How can I get an embedded Jetty server up and running with full JSTL support?

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• ActiveRecordStore ruby

  - by Andy

  I've had two previous questions about active record store that all came down to the same thing. Here's what I want: I want to access the session at any time and see who is online right now and access their session variable from anywhere. I need this because: Users are separated into groups. If one person logs in he receives an api token that I receive from some third party site. If a person from the same group logs in he needs to have that same api token in his session. I cannot regenerate new api tokens on a per call basis. I think active record store is a perfect solution for me, however, I have a problem implementing it!!! InvalidAuthenticityToken keeps getting thrown because I used to use the default cookie store. Thus I made this script to delete cookies but it does not seem to work: In application controller after_filter :delete_cookie def delete_cookie puts "deleting cookies" cookies.to_hash.each_pair do |k, v| puts k cookies.delete(k) end end The only other response I got was to remove protect from forgery. http://stackoverflow.com/questions/2941664/activerecordstore-invalidauthenticitytoken

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• Flex 3 : UIComponent.addChild issue

  - by Frank

  Hello SOers, I've run into a nice problem with the UIComponent.addChild(...) function. First of all, I'm using ESRI Api for Flex. In this API you find a class called Graphic that inherits UIComponent. Basically, I'm trying to add, as a child, a Graphic 'g' to another graphic 'parent'. So that when you delete the 'parent' graphic the 'g' graphic deletes as well. private function writeMeasurements(parent:Graphic):void { var g:Graphic; if(parent.geometry.extent != null) g = new Graphic(parent.geometry.extent.center); else g = new Graphic(parent.geometry); g.initialize(); g.name = UIDUtil.createUID(); g.symbol = txtSym; graphicsLayer.add(g); parent.addChild(g); } graphicsLayer class This code actually runs pretty fine. The problem is after... it's like if the addChild function was asynchronious. This is the error I get : TypeError: Error #1009: Il est impossible d'accéder à la propriété ou à la méthode d'une référence d'objet nul. at com.esri.ags::Graphic/updateDisplayList()[C:\checkout\flex_api\api\src\com\esri\ags\Graphic.as:346] at mx.core::UIComponent/validateDisplayList() at mx.managers::LayoutManager/validateDisplayList() at mx.managers::LayoutManager/doPhasedInstantiation() at Function/http://adobe.com/AS3/2006/builtin::apply() at mx.core::UIComponent/callLaterDispatcher2() at mx.core::UIComponent/callLaterDispatcher() I know this is a very specific question, but I think you guys are the BEST! Thanks.

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• How can I create a HTTP POST request with Qt 4.6.1?

  - by Tobias Langner

  How can I create a HTTP POST request with some URL encoded parameters using Qt 4.6.1? I figured out that I can create a QNetworkRequest, set all the parameters there and send it via QNetworkAccessManagers post method. But how can I add some URL-encoded parameters to the request? In the end I want to access the Eve API using Qt/C++. A Python example can be found here: http://www.eveonline.com/api/doc/example-python.asp I managed it using something like (still to be refactored and formed into something useful): QNetworkReply *requestApi(QNetworkAccessManager &nwam) { QNetworkRequest request(QUrl("http://api.eve-online.com/account/Characters.xml.aspx")); request.setHeader(QNetworkRequest::ContentTypeHeader,"application/x-www-form-urlencoded"); QByteArray data; QUrl params; params.addQueryItem("userid","user"); params.addQueryItem("apiKey","key"); data.append(params.toString()); data.remove(0,1); QNetworkReply *reply = nwam.post(request,data); return reply; }

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• jQuery - .Ready fires on div tag not in the page

  - by Anders Juul

  Dear all, I have implemented below function in a separate .js script file which I load in my main page (Asp.net mvc). The call back to server is rather costly but ok if specifically requested on the sub-page / content page on which my div tag needs to be filled. My problem is that the code runs on every page, including pages where the div tag is not present. How can I remedy my code? Any comments welcome, Thanks, Anders, Denmark jQuery("divStatWrapper").ready(function() { jQuery.getJSON("/Statistics/GetPointsDevelopment", function(json) { jQuery("#divStatWrapper #divStatLoading").fadeOut(1000); var jsonPoints = new Array(); jQuery.each(json.Points, function(i, item) { jsonPoints.push(item.PlayerPoints ); }); jsonPoints.reverse(); var api = new jGCharts.Api(); jQuery('<img>') .attr('src', api.make({ data : jsonPoints, type : "lc", size : "600x250" })) .appendTo("#divStatContents"); jQuery("#divStatWrapper #divStatContents").fadeIn(1000); }); });

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• Accessing Yahoo realtime stock quotes

  - by DVK

  There's a fairly easy way of retrieving 15-minute delayed quotes off of Yahoo! Finance web site ("quotes.csv" API). However, so far I was unable to find any info on how to access real-time quotes. The hang-ups with real-time quotes are: Only available to logged-in user No API Non-obvious how to scrape the info - I'm somewhat convinced they are placed on the page by some weird Ajax call. So I was wondering if anyone had managed to develop a publically available solution to retrieve real-time quotes for a stock from Yahoo! Finance. Notes: Implementation language/framework need is flexible but Perl or Excel is highly preferred. Assume that security is not an issue - I'm willing to supply yahoo userid and pasword, even in cleartext. I'm not 100% hung up on Yahoo - they are merely the only provider of free realtime stock quotes I'm familiar with. if the same thing can be done with Google Finance, I'd be just as happy. This is for a personal project, so scalability/fault tolerance/etc... are not important. I'm looking for a "do the whole retrieval" library ideally, but if I'm pointed to partial solutions (e.g. how to retrieve info from Yahoo's user-logged-in pages; how to scrape realtime quotes from Yahoo's page) I can fill in the blanks. I saw Finance::YahooQuote but it does not seem to allow you to supply log-in information and appears to use the lagging quotes.csv API Thanks!

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• .NET Fingerprint SDK

  - by Kishore A

  I am looking for a comparison of Fingerprint reader SDKs available for .NET (we are using .Net 3.5). My requirements are 1. Associate more than one fingerprint with a person. 2. Store the fingerprints it self. (So I do not have to change the Database for my program.) 3. Work in both event and no-event mode. (Event Mode: Give notification if someone swipes a finger on the reader; No-Event mode: I activate the reader in synchronous mode). 4. Should provide API for either confirming a user or Identifying a user. (Confirm API: I send the person's ID/unique number and it confirms that it is the same person; Identifying API: The sdk sends the person's ID after it looks up the person using the fingerprint) I would also like to get a comparison of Fingerprint readers if anybody knows of one available on the internet. Hope I was clear. Thanks, Kishore.

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• Having problems with uploading photos to TwitPic using OAuth in Objective C on the iPhone

  - by M. Bedi

  I have been working on an iPhone app that has a feature of uploading photos to TwitPic. I have it working with basic authentication. I am trying to get it working with OAuth. I am getting authentication errors. I have studied very carefully the TwitPic documentation. I am authorising the app by displaying a UI Web View and the it returns a PIN value. I enter the PIN value in the app and request the token. I am able to upload status updates to Twitter but not photos. My code is based on some example code from here: Example iPhone app using OAuth Here is my code: NSString *url = @"http://api.twitpic.com/2/upload.json"; NSString *oauth_header = [oAuth oAuthHeaderForMethod:@"POST" andUrl:url andParams:nil]; NSLog(@"OAuth header : %@\n\n", oauth_header); ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL:[NSURL URLWithString:url]]; [request addRequestHeader:@"User-Agent" value:@"ASIHTTPRequest"]; request.requestMethod = @"POST"; [request addRequestHeader:@"X-Auth-Service-Provider" value:@"https://api.twitter.com/1/account/verify_credentials.json"]; [request addRequestHeader:@"X-Verify-Credentials-Authorization" value:oauth_header]; NSData *imageRepresentation = UIImageJPEGRepresentation(imageToUpload, 0.8); [request setData:imageRepresentation forKey:@"media"]; [request setPostValue:@"Some Message" forKey:@"message"]; [request setPostValue:TWITPIC_API_KEY forKey:@"key"]; [request setDelegate:self]; [request setDidFinishSelector:@selector(requestDone:)]; [request setDidFailSelector:@selector(requestFailed:)]; [request start]; Here is the OAuth Header: OAuth realm="http://api.twitter.com/", oauth_timestamp="1275492425", oauth_nonce="b686f20a18ba6763ac52b689b2ac0c421a9e4013", oauth_signature_method="HMAC-SHA1", oauth_consumer_key="zNbW3Xi3MuS7i9cpz6fw", oauth_version="1.0", oauth_token="147275699-jmrjpwk3B6mO2FX2BCc9Ci9CRBbBKYW1bOni2MYs", oauth_signature="d17HImz6VgygZgbcp845CD2qNnI%3D"

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• Working with a large data object between ruby processes

  - by Gdeglin

  I have a Ruby hash that reaches approximately 10 megabytes if written to a file using Marshal.dump. After gzip compression it is approximately 500 kilobytes. Iterating through and altering this hash is very fast in ruby (fractions of a millisecond). Even copying it is extremely fast. The problem is that I need to share the data in this hash between Ruby on Rails processes. In order to do this using the Rails cache (file_store or memcached) I need to Marshal.dump the file first, however this incurs a 1000 millisecond delay when serializing the file and a 400 millisecond delay when serializing it. Ideally I would want to be able to save and load this hash from each process in under 100 milliseconds. One idea is to spawn a new Ruby process to hold this hash that provides an API to the other processes to modify or process the data within it, but I want to avoid doing this unless I'm certain that there are no other ways to share this object quickly. Is there a way I can more directly share this hash between processes without needing to serialize or deserialize it? Here is the code I'm using to generate a hash similar to the one I'm working with: @a = [] 0.upto(500) do |r| @a[r] = [] 0.upto(10_000) do |c| if rand(10) == 0 @a[r][c] = 1 # 10% chance of being 1 else @a[r][c] = 0 end end end @c = Marshal.dump(@a) # 1000 milliseconds Marshal.load(@c) # 400 milliseconds Update: Since my original question did not receive many responses, I'm assuming there's no solution as easy as I would have hoped. Presently I'm considering two options: Create a Sinatra application to store this hash with an API to modify/access it. Create a C application to do the same as #1, but a lot faster. The scope of my problem has increased such that the hash may be larger than my original example. So #2 may be necessary. But I have no idea where to start in terms of writing a C application that exposes an appropriate API. A good walkthrough through how best to implement #1 or #2 may receive best answer credit.

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• Unable to fetch initial output of "defrag" commad in Windows Server 2008 R2 in WOW64 environment.

  - by Ganesh

  Hi All, [Application & code back ground] I have an MFC application which is executing on Windows Server 2008 R2 in WOW64 environment. In which on user input it defragments the selected drive on the disk. I initiated the process(.i.e. cmd /c defrag –v c:) of defragmentation using the CreateProcess() API, along with this to display output of the process on the main screen I created the pipe using CreatePipe() API. I used PeekNamedPipe() & ReadFile() API to get the output and display. [Problem Area] When the process is launched I am not getting the initial output as below: Microsoft Disk fragmenter Copyright © 2007 Microsoft Crop. Invoking defragmentation on (C:)…. I constantly monitor the output of the process while it is under progress but not able to get any thing as output in the pipe. It seem the process is not doing any thing and appears as if the application is not responding. But after certain period of time, once the process is about to completed I get result along with the initial data. [Sample code] //Pipe created if(0 == ::CreatePipe(&l_hStdOutRead, &l_hStdOutWrite, &l_SecurityAttribute, (DWORD)NULL)) { //Error code } //Process created/launched if (0 == ::CreateProcess(NULL, (LPTSTR)f_csProcessName, &l_stSecurityAttributes, NULL, TRUE, CREATE_NO_WINDOW, NULL,NULL, &l_StartupInfo, &l_CmdPI)) { //Error code } //Read output if (0 == ::PeekNamedPipe(m_hStdOutRead, l_cArrPeekBuffer, (DWORD)NULL, (LPDWORD)NULL, &l_dwAvailable, (LPDWORD)NULL)) { //Return to read again } if (MPLUSFALSE == ::ReadFile(m_hStdOutRead, l_cArrOutput, min(BUFFER_SIZE - 2, l_dwAvailable), &l_dwRead, NULL) || !l_dwRead) { //error code } //Display data. If any one is aware of similar problem or worked on the similar issue please let me know the solution. Thanks in Advance, Ganesh

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