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  • Block-level deduplicating filesystem

    - by James Haigh
    I'm looking for a deduplicating copy-on-write filesystem solution for general user data such as /home and backups of it. It should use online/inline/synchronous deduplication at the block-level using secure hashing (for negligible chance of collisions) such as SHA256 or TTH. Duplicate blocks need not even touch the disk. The idea is that I should be able to just copy /home/<user> to an external HDD with the same such filesystem to do a backup. Simple. No messing around with incremental backups where corruption to any of the snapshots will nearly always break all later snapshots, and no need to use a specific tool to delete or 'checkout' a snapshot. Everything should simply be done from the file browser without worry. Can you imagine how easy this would be? I'd never have to think twice about backing-up again! I don't mind a performance hit, reliability is the main concern. Although, with specific implementations of cp, mv and scp, and a file browser plugin, these operations would be very fast, especially when there is a lot of duplication as they would only need to transfer the absent blocks. Accidentally using conventional copy tools that do not integrate with the FS would merely take longer, waste some bandwidth when copying remotely and waste some CPU, as the duplicate data would be re-read, re-transferred and re-hashed (although nothing would be re-written), but would absolutely not corrupt anything. (Some filesharing software may also be able to benefit by integrating with the FS.) So what's the best way of doing this? I've looked at some options: lessfs - Looks unmaintained. Any good? [Opendedup/SDFS][3] - Java? Could I use this on Android?! What does [SDFS][4] stand for? [Btrfs][5] - Some patches floating around on mailing list archives, but no real support. [ZFS][6] - Hopefully they'll one day relicense under a true Free/Opensource GPL-compatible licence. Also, 2 years ago I had a go at an attempt in Python using Fuse at the file-level to be used over the top of a typical solid FS such as EXT4, but I found Fuse for Python underdocumented and didn't manage to implement all of the system calls. My first post here, so I can't post more than 2 links until I get over 10 rep: [3]: http://www.opendedup.org/ [4]: https://en.wikipedia.org/w/index.php?title=SDFS&action=edit&redlink=1 [5]: https://en.wikipedia.org/wiki/Btrfs#Features [6]: https://en.wikipedia.org/wiki/ZFS#Linux

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  • Relationship DAO, Servlet, JSP and POJO [closed]

    - by John Hendrik
    Possible Duplicate: Relationship DAO, Servlet, JSP and POJO I want to implement a JSP, POJO, DAO and Servlet in my J2EE program. However, I don't fully understand how the relationship between these elements should be. Is the following (MVC) setup the right way to do it? Main class creates servlet(controller) Servlet has a DAO defined in its class DAO has a POJO defined in its class Servlet communicates with the view (JSP page) Please give your feedback.

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  • is Pidgin bugged? I cannot set it up for facebook [closed]

    - by Elysium
    Possible Duplicate: Pidgin, how to set up facebook I've tried almost all options and used this guide (https://wiki.archlinux.org/index.php/Pidgin#Facebook_XMPP) to set up Pidgin for my facebook acccount, but it is simply impossible. At the username section I am using my actual username....not the long copied link from facebook...so that cannot be the issue. Is there anyone out there who had had issues of the same type? Thanks

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  • How to Run PowerShell 2 and 3 Concurrently in Windows 8

    - by Taylor Gibb
    Windows 8 comes with a shiny new version of PowerShell, version 3. But while playing around with it, I have noticed a lot of scripts that I had written for version 2 are now throwing errors, so here’s how to get version 2 back while not losing version 3. How to Banish Duplicate Photos with VisiPic How to Make Your Laptop Choose a Wired Connection Instead of Wireless HTG Explains: What Is Two-Factor Authentication and Should I Be Using It?

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  • Five Day Forecast for the Mushroom Kingdom [Wallpaper]

    - by Asian Angel
    Definitely not going to be a dull week… Note: The original size of the wallpaper is 1600*900, but it can be easily placed on a larger matching color background to fit your monitor’s resolution. Mario, Weather, Forecast [The Paper Wall] How to Use an Xbox 360 Controller On Your Windows PC Download the Official How-To Geek Trivia App for Windows 8 How to Banish Duplicate Photos with VisiPic

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  • Free online PHP hosting [closed]

    - by Anthony Newman
    Possible Duplicate: How to find web hosting that meets my requirements? I have a PHP script that can take $_GET parameters from a URL (i.e. http://www.example.com/test.php?name=george). I'd like to be able to host this script online so that others can pass parameters to it to obtain the returned data. Anyone know of a free PHP hosting site that would allow for his functionality? (PS: I can't host it myself) Thanks!

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  • Is perfectionism a newbie's friend or enemy? [closed]

    - by Akromyk
    Possible Duplicate: Where do you draw the line for your perfectionism? I see that the development community is very focused on doing things the right way and personally I would like to do the same too, however, is it a good or bad idea for a newbie to focus on design principles, design patterns, and commenting code when getting started, or is it better to let creativity run wild and potentially write sloppy code. Where should a newbie draw the line?

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  • Week in Geek: Users can Upgrade Windows XP, Vista, 7, and 8 Release Preview for $39.99

    - by Asian Angel
    Our latest edition of WIG is filled with news link goodness covering topics such as Google has announced another round of product closures, Mozilla will be cutting back on development of Thunderbird, the dark side of QR codes, and more. How to Use an Xbox 360 Controller On Your Windows PC Download the Official How-To Geek Trivia App for Windows 8 How to Banish Duplicate Photos with VisiPic

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  • Whats is the best Windows VPS hosting? [closed]

    - by Donny V.
    Possible Duplicate: How to find web hosting that meets my requirements? I'm currently using shared hosting. I want more control over my IIS and also I need to run in full trust. There are a lot of options out there for Windows VPS hosting. Which ones do you recommend is the best? Some must haves Has to have great support Automatic hardware fail overs Access through Remote Desktop (you would be amazed some don't offer this) No limit on what I can install on it

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  • How can I model a pendulum blade?

    - by Micah Delane Bolen
    Like this one from Saw V: What primitive shape/s would you start out with? How would you transform the primitive shape/s to give it a nice, smooth, sharp blade on one side without distorting the entire object in a weird way? I tried starting out with a cylinder and then subtracting the top half using a duplicate cylinder and a difference modifier, but I ended up distorting the entire object when I tried to pull the "blade" edges together. I think I need to add lattices to smoothly "sharpen" the edge of the blade.

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  • Free file/image hosting website with api [closed]

    - by KoolKabin
    Possible Duplicate: Which image sharing websites supports file uploading dynamically via api I would like to know is there any free images/file hosting website which will allow users to upload image to its website using api? I tried with imageshack.us its fine only problem with it is that i could not make upload the files under my account in imageshack . URL: http://www.outsourcingnepal.com/ImageShack/Uploader/

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  • Reasons to Use Version Control [closed]

    - by Solomon Wise
    Possible Duplicate: I'm a Subversion geek, why I should consider or not consider Mercurial or Git or any other DVCS? What is the value of using version control? I am a relative noob to programming, and am not going to be developing super-good software or even programming professionally anytime soon. With this predicament, is there really any reason to learn git or subversion or any other version control systems?

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  • Desktop Fun: Starships Wallpaper Collection Series 2

    - by Asian Angel
    The starships shown in our favorite sci-fi serials come in all shapes and sizes, serve different purposes, and make us yearn to have one to call our own. Travel among the stars on your desktop with the second in our series of Starships Wallpaper collections. How to Banish Duplicate Photos with VisiPic How to Make Your Laptop Choose a Wired Connection Instead of Wireless HTG Explains: What Is Two-Factor Authentication and Should I Be Using It?

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  • Search Engine Optimization - Tips For Targeted Traffic Using Article Directories

    Article directories play a vital roll in the way business is done online. These link building websites are an awesome way to spread information in a very short period of time. Promoting your original content is vital, whether it is on your business website or some where else it needs to be seen. Many directories have very strict rules for authors wishing to submit their content. This is to prevent duplicate content that may already be in their database and to insure the best quality for their viewers.

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  • Free Hosting With these specs [closed]

    - by blunders
    Possible Duplicate: How to find web hosting that meets my requirements? Looking for to make a quick site and have the following requirements: It's free No ADs, frames, etc Support for directory/site password Allow web-based or FTP file transfer Allows 100 MB to 1 GB of storage custom short URL or sub-domain Realize this might be very narrow, but figured I'd ask just in case there was a good solution.

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  • What is the best method to start understanding BIG project source code? [closed]

    - by Mr.32
    Possible Duplicate: How do you dive into large code bases? Sometimes before developing new products we need to understand some existing products or existing source code. Sometimes to write another small module of that big project we need to understand that big source code. In our case we need to study and understand a project with lots of files and folders. What is the easiest and most comfortable way to do it ? (especially for C and C++ and under Linux)

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  • Are there any formal approaches for familiarising oneself with a new or legacy codebase? [closed]

    - by codecowboy
    Possible Duplicate: How do you dive into large code bases? As a contractor, I often encounter legacy codebases which might have little or no supporting documentation. Are there any techniques or best practices? I work with PHP and web applications, though also face situations in which I have to edit code in an unfamiliar language. How can I leave a codebase in better shape, learn something along the way and impress the team I'm working with?

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  • What Forum Software should I use?

    - by Christofian
    This is a general, community wiki catch-all question to address "I need a forum script that does x, y, and z..." questions. If your question was closed as a duplicate of this question and you feel that the information provided here does not provide a sufficient answer, please open a discussion on Pro Webmasters Meta. I have a list of features that I want for my website's forum script: where can I find a (free or paid) script that includes all of them?

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  • Algorithm for flattening overlapping ranges

    - by Joseph
    I am looking for a nice way of flattening (splitting) a list of potentially-overlapping numeric ranges. The problem is very similar to that of this question: Fastest way to split overlapping date ranges, and many others. However, the ranges are not only integers, and I am looking for a decent algorithm that can be easily implemented in Javascript or Python, etc. Example Data: Example Solution: Apologies if this is a duplicate, but I am yet to find a solution.

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  • Who are the most influential computer scientists today? [closed]

    - by Banana
    Possible Duplicate: Which individuals are having the greatest impact on software developers today? Computer science has changed dramatically during the last decades, and new fields that recently arose in the scientific community are completely different with respect to classical cs related topics (for example, social network analysis). I'd like to have an overview of the most influential computer scientists in activity, or at least, who have been working during the last 10/15 years, possibly listed according to their specific field of study.

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  • Window controls appearing on the right side after updating to 12.10 [closed]

    - by Ankit
    Possible Duplicate: Window buttons stuck on right side After updating from Ubuntu 12.04 to 12.10 the window controls(min, max, close) have started appearing on the right side when the window is not maximized, they again come on the left side when the window is maximized. I tried changing it using Ubuntu Tweak, but with no effect. Other suggestion I found was to change it using gconf-editor and changing apps - metacity - general click button_layout but there is no metacity in the apps section.

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  • Keep coding the wrong way to remain consistent? [closed]

    - by bwalk2895
    Possible Duplicate: Code maintenance: keeping a bad pattern when extending new code for being consistent, or not? To keep things simple let's say I am responsible for maintaining two applications, AwesomeApp and BadApp (I am responsible for more and no that is not their actual names). AwesomeApp is a greenfield project I have been working on with other members on my team. It was coded using all the fancy buzzwords, Multilayer, SOA, SOLID, TDD, and so on. It represents the direction we want to go as a team. BadApp is a application that has been around for a long time. The architecture suffers from many sins, namely everything is tightly coupled together and it is not uncommon to get a circular dependency error from the compiler, it is almost impossible to unit test, large classes, duplicate code, and so on. We have a plan to rewrite the application following the standards established by AwesomeApp, but that won't happen for a while. I have to go into BadApp and fix a bug, but after spending months coding what I consider correctly, I really don't want do continue perpetuate bad coding practices. However, the way AwesomeApp is coded is vastly different from the way BadApp is coded. I fear implementing the "correct" way would cause confusion for other developers who have to maintain the application. Question: Is it better to keep coding the wrong way to remain consistent with the rest of the code in the application (knowing it will be replaced) or is it better to code the right way with an understanding it could cause confusion because it is so much different? To give you an example. There is a large class (1000+ lines) with several functions. One of the functions is to calculate a date based on an enumerated value. Currently the function handles all the various calculations. The function relies on no other functionality within the class. It is self contained. I want to break the function into smaller functions (at the very least) and put them into their own classes and hide those classes behind an interface (at the most) and use the factory pattern to instantiate the date classes. If I just broke it out into smaller functions within the class it would follow the existing coding standard. The extra steps are to start following some of the SOLID principles.

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  • 100 Years of Earthquakes [Wallpaper]

    - by Jason Fitzpatrick
    If loved the tornado-visualization we posted last month, this visualization of a century of earthquakes around the globe will be right up your alley. Courtesy of the same designer behind the tornado tracks, John Nelson of IDV Solutions, this visualization captures 203,186 magnitude 4 and higher earthquakes that occurred between 1898 and 2003. Hit up the link below to grab a wallpaper-size copy from Flickr. Earthquakes Since 1989 by Magnitude [via Smithsonian] How to Use an Xbox 360 Controller On Your Windows PC Download the Official How-To Geek Trivia App for Windows 8 How to Banish Duplicate Photos with VisiPic

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  • What snapshot software do you recommend? [closed]

    - by Charbel
    Possible Duplicate: What screenshot tools are available? Hi, is there a snapshot software for Ubuntu? Something like SnagIt? The idea is many times I have to take the snapshot and edit the image to crop to my region of interest, SnagIt does that automatically and very nicely. Another feature is to take a snapshot of text (that can't be otherwise copied - like text in a photo) and then parse it into actual text document using an OCR technology. Thanks

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  • where can I get Mono 2.10 for Maverick and Natty? [closed]

    - by burli
    Possible Duplicate: Upgrading to latest stable Mono Hi, I want to use Mono for some projects, but in Ubuntu (or Debian in general) is just 2.6.7 avalible. And I could not find any packages or PPAs. I tried to compile it myself, but I failed. Where can I get the current Mono 2.10 Version for Ubuntu Maverick and Natty? http://badgerports.org/ only supports Lucid and Hardy and is not up to date

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