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  • How can I keep directories in sync

    - by Guillaume Boudreau
    I have a directory, dirA, that users can work in: they can create, modify, rename and delete files & sub-directores in dirA. I want to keep another directory, dirB, in sync with dirA. What I'd like, is a discussion on finding a working algorithm that would achieve the above, with the limitations listed below. Requirements: 1. Something asynchronous - I don't want to stop file operations in dirA while I work in dirB. 2. I can't assume that I can just blindly rsync dirA to dirB on regular interval - dirA could contain millions of files & directories, and terrabytes of data. Completely walking the dirA tree could take hours. Those two requirements makes this really difficult. Having it asynchronous means that when I start working on a specific file from dirA, it might have moved a lot since it appeared. And the second limitation means that I really need to watch dirA, and work on atomic file operations that I notice. Current (broken) implementation: 1. Log all file & directory operations in dirA. 2. Using a separate process, read that log, and 'repeat' all the logged operations in dirB. Why is it broken: echo 1 > dirA/file1 # Allow the 'log reader' process to create dirB/file1: log = "write dirA/file1"; action = cp dirA/file1 dirB/file1; result = OK echo 1 > dirA/file2 mv dirA/file1 dirA/file3 mv dirA/file2 dirA/file1 rm dirA/file3 # End result: file1 contains '1' # 'log reader' process starts working on the 4 above file operations: log = "write file2"; action = cp dirA/file2 dirB/file2; result = failed: there is no dirA/file2 log = "rename file1 file3"; action = mv dirB/file1 dirB/file3; result = OK log = "rename file2 file1"; action = mv dirB/file2 dirB/file1; result = failed: there is no dirB/file2 log = "delete file3"; action = rm dirB/file3; result = OK # End result in dirB: no more files! Another broken example: echo 1 > dirA/dir1/file1 mv dirA/dir1 dirA/dir2 # 'log reader' process starts working on the 2 above file operations: log = "write file1"; action = cp dirA/dir1/file1 dirB/dir1/file1; result = failed: there is no dirA/dir1/file1 log = "rename dir1 dir2"; action = mv dirB/dir1 dirB/dir2; result = failed: there is no dirA/dir1 # End result if dirB: nothing!

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  • Empathy not showing in memenu

    - by dadexix86
    I just installed 12.10 and noticed that, even if I added more than one account to Online Accounts and I'm actually using empathy to chat, it is not present in Messaging Menu or in any other point of the tray. This means that if i close it, it remains open but unaccessbile and I have to start it again from dash. How can i integrate it in messaging menu (shouldn't this be the default?) or, at least, make it showing me a tray icon?

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  • Google Analytics on Android

    - by pjv
    There is a specific and official analytics SDK for native Android apps (note that I'm not talking about webpages in apps on a phone). This library basically sends pages and events to Google Analytics and you can view your analytics in exactly the same dashboard as for websites. Since my background is apps rather than websites, and since a lot of the Google Analytics terminology seems particularly inapplicable to a native app, I need some pointers. Please discuss my remarks, provide some clarification where you think I'm off-track, and above all share good experiences! 1. Page Views Pages mostly can match different Activities (and Dialogs) being displayed. Activities can be visible behind non-full-screen Activities however, though only the top-level Activity can be interacted. This sort-off clashes with a "(page) view". You'd also want at least one page view for each visit and therefore put one page view tracker in the Application class. However this does not constitute a window or sorts. Usually an Activity will open at the same time, so the time spent on that page will have been 0. This will influence your "time spent" statistics. How are these counted anyway? Moreover, there is a loose coupling between the Activities, by means of Intents. A user can, much like on any website, step in at any Activity, although usually this then concerns resuming the application where he left off. This makes that the hierarchy of Activities usually is very flat. And since there are no url's involved. What meaning would using slashes in page titles have, such as "/Home"? All pages would appear on an equal level in the reports, so no content drilldown. Non-unique page views seem to be counted as some kind of indicator of successfulness: how often does the visitor revisit the page. When the user rotates the screen however usually an Activity resumes again, thus making it a new page view. This happens a lot. Maybe a well-thought-through placement of the call might solve this, or placing several, I'm not sure. How to deal with Page Views? 2. Events I'd say there are two sorts: A user event Something that happened, usually as an indirect consequence of the above. The latter particularly is giving me headaches. First of all, many events aren't written in code any more, but pieced logically together by means of Intents. This means that there is no place to put the analytics call. You'd either have to give up this advantage and start doing it the old-fashioned way in favor of good analytics, or, just be missing some events. Secondly, as a developer you're not so much interested in when a user clicks a button, but if the action that should have been performed really was performed and what the result was. There seems to be no clear way to get resulting data into Google Analytics (what's up with the integers? I want to put in Strings!). The same that applies to the flat pages hierarchy, also goes for the event categories. You could do "vertical" categories (topically, that is), but some code is shared "horizontally" and the tracking will be equally shared. Just as with the Intents mechanism, inheritance makes it hard for you to put the tracking in the right places at all times. And I can't really imagine "horizontal" categories. Unless you start making really small categories, such as all the items form the same menu in one category, I have a hard time grasping the concept. Finally, how do you deal with cancelling? Usually you both have an explicit cancel mechanism by ways of a button, as well as the implicit cancel when the "back"-button is pressed to leave the activity and there were no changes. The latter also applies to "saves", when the back button is pressed and there ARE changes. How are you consequently going to catch all these if not by doing all the "back"-button work yourself? How to deal with events? 3. Goals For goal types I have choice of: URL Destination, Time on Site, and Pages/Visit. Most apps don't have a funnel that leads the user to some "registration done" or "order placed" page. Apps have either already been bought (in which case you want to stimulate the user to love your app, so that he might bring on new buyers) or are paid for by in-app ads. So URL Destination is not a very important goal. Time on Site also seems troublesome. First, I have some doubt on how this would be measured. Second, I don't necessarily want my user to spend a lot of time in my already paid app, just be active and content. Equivalently, why not mention how frequent a user uses your app? Regarding Pages/Visit I already mentioned how screen orientation changes blow up the page view numbers. In an app I'd be most interested in events/visit to measure the user's involvement/activity. If he's intensively using the app then he must be loving it right? Furthermore, I also have some small funnels (that do not lead to conversion though) that I want to see streamlined. In my mind those funnels would end in events rather than page views but that seems not to be possible. I could also measure clickthroughs on in-app ads, but then I'd need to track those as Page Views rather than Events, in view of "URL Destination". What are smart goals for apps and how can you fit them on top of Analytics? 4. Optimisation Is there a smart way to manually do what "Website Optimiser" does for websites? Most importantly, how would I track different landing page designs? 5. Traffic Sources Referrals deal with installation time referrals, if you're smart enough to get them included. But perhaps I'd also want to get some data which third-party app sends users to my app to perform some actions (this app interoperability is possible via Intents). Many of the terminologies related to "Traffic Sources" seem totally meaningless and there is no possibility of connecting in AdSense. What are smart uses of this data? 6. Visitors Of the "Browser capabilities", "Network Properties" and "Mobile" tabs, many things are pointless as they have no influence on / relation with my mostly offline app that won't use flash anyway. Only if you drill down far enough, can you get to OS versions, which do matter a lot. I even forgot where you could check what exact Android devices visited. What are smart uses of this data? How can you make the relevant info more prominent? 7. Other No in-page analytics. I have to register my app as a web-url (What!?)?

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  • PhotoNote WordPress Theme by WPZOOM

    - by Matt
    PhotoNote is the new photo and video WordPress theme from WPZOOM. This is a premium theme that offers a concise way to show your photos, videos & blog posts, and has a Responsive Layout which means that the theme will automatically resize to fit any screen resolution or device it is opened on. This is [...] Related posts:Notebook Multimedia WordPress Theme Beveled Premium WordPress Theme by Woothemes Genesis WordPress Theme Framework

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  • Multiple Apache Web Server Flaws Patched

    <b>Serverwatch:</b> "The Apache HTTP Web Server is the most widely deployed Web server on the Internet today, which means that vulnerabilities in the open source server can have a devastating impact. That also makes security updates like the new 2.2.15 release critical, since it addresses several security vulnerabilities in Apache's flagship HTTP Web server."

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  • .Net Application & Database Modularity/Reuse

    - by Martaver
    I'm looking for some guidance on how to architect an app with regards to modularity, separation of concerns and re-usability. I'm working on an application (ASP.Net, C#) that has distinctly generic chunks of functionality, that I'd love to be able to lift out, all layers, into re-usable components. This means the module handles the database schema, data access, API, everything so that the next time I want to use it I can just register the module and hook into it. Developing modules of re-usable functionality is a no-brainer, but what is really confusing me is what to do when it comes to handling a core re-usable database schema that serves the module's functionality. In an ideal world, I would register a module and it would ensure that the associated database schema exists in the DB. I would code on the assumption that the tables exist, calling the module's functionality through the DLL, agnostic of the database layer. Kind of like Enterprise Library's Caching/Logging Application Block, which can create a DB schema in the target DB to use as a data store. My Questions is: What do you think is the best way to achieve this, firstly, in terms design architecture, and secondly solution structure. What patterns/frameworks do you know that exist & support this kind of thing? My thoughts so far: I mostly use Entity Framework and SQL Server DB Projects. I thought about a 'black box' approach to modules of functionality. I could use use a code-first approach in EF4, and use the ObjectContext to create a database when the module is initialized. However this means that all of the entities that my module encapsulates would be disconnected from the rest of the application because they belonged to an abstracted ObjectContext. Further - Creating appropriate indexes and references between domain entities and the module's entities would be impossible to do practically. I've thought of adopting Enterprise Library and creating my own Application Blocks. I'm not sure how this would play nice with Entity Framework (if at all) though. I like the idea of building on proven patterns & practices to encapsulate established, reusable functionality. I thought of abandoning Entity Framework for the Module, and just creating a separate DB schema for the module with its own set of stored procedures & ADO.Net. Then deploying the script at run-time if interrogation shows that it doesn't exist. But once again, for application developing outside of the application, I would want to use Entity Framework and I would have to use the module separately, disconnected from the domain ObjectContext. Has anyone had experience developing these sorts of full-stack modules? What advice can you offer? Am I biting off more than I can chew?

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  • Breadcrumbs - The New Ranking Factor in SEO

    Breadcrumbs were traditionally used as means of navigation factor for the visitors. Since then, the use of breadcrumbs has gone under a change and breadcrumbs have come to hold an important position in boosting the SEO process of a website.

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  • How can one keep an ecommerce site active?

    - by Mantorok
    So, you build an e-commerce site, all your products are on there, but then very little changes which obviously causes your site to become less active, and ultimately not ranking as highly in search engines. Is there anything that can be done to keep it active? I'm aware that inbound links are important and I guess these come over time, are there any other recommended means of keeping the site active?

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  • Introducing Exam Preparation Seminars on iPad

    - by Brandye Barrington
    Oracle University announced last week, the availability of the new Oracle Training On Demand app for iPad. This means that Oracle Certification's Exam Preparation Seminars, which are in the Training On Demand format are conveniently available for viewing on your iPad. The app is supplemental to the Web browser version. Features include: Access to your Oracle Training On Demand course titles High-quality video playback Video download and offline playback Interactive Table of Contents Course search Ability to search and preview available courses The app is available for free on the Apple App Store.

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  • What is happening to a domain with status PENDING DELETE as well as AUTORENEWPERIOD?

    - by Alex Angas
    A domain I once registered but gave away: Expiration Date:13-Mar-2013 14:39:45 UTC Sponsoring Registrar:Directi Internet Solutions Pvt. Ltd. dba PublicDomainRegistry.com (R159-LRMS) Status:PENDING DELETE RESTORABLE Status:HOLD Status:AUTORENEWPERIOD Status:REDEMPTIONPERIOD Registrant ID:DI_7838158 Registrant Name:scherhag Registrant Organization:Locafroid europe sa I'd like to get this domain back and I'm hoping that PENDING DELETE means it might soon be released to the market. However I'm not sure, as there is also a status that says AUTORENEWPERIOD?

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  • Increase Your Alexa Rank in 5 Tips

    Alexa Rank is normally used for measuring the advertising cost in a blog via ad networks like Google AdSense, although Alexa Rank is not the perfect way to know the value of websites. Improving Alexa Rank means creating quality contents frequently.

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  • How to unit test with lots of IO

    - by Eric
    I write Linux embedded software which closely integrates with hardware. My modules are such as : -CMOS video input with kernel driver (v4l2) -Hardware h264/mpeg4 encoders (texas instuments) -Audio Capture/Playback (alsa) -Network IO I'd like to have automated testing for those functionalities, such as integration testing. I am not sure how I can automate this process since most of the top level functionalities I face are IO bound. Sure, it is easy to test functions individually, but whole process checking means depending on tons of external dependencies only available at runtime.

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  • The Dangers of Vertical Video; A Public Service Announcement [Video]

    - by Jason Fitzpatrick
    According to the puppets in this tongue-in-cheek PSA, you’d better start shooting your video in the right orientation or very bad things–potentially involving George Lucas–will come to pass. [via Mashable] HTG Explains: What Is Windows RT and What Does It Mean To Me? HTG Explains: How Windows 8′s Secure Boot Feature Works & What It Means for Linux Hack Your Kindle for Easy Font Customization

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  • MicroTraining: Managing SSIS Connections–10 Apr 2012 at 10:00 AM EDT!

    - by andyleonard
    I am pleased to announce another free Linchpin People MicroTraining Event! On Tuesday, 10 Apr 2012 at 10:00 AM EDT, I will present Managing SSIS Connections . In this presentation, I will show you several means for managing SSIS connectivity using built-in functionality and a custom trick or two I picked up over the past few years. Want to learn more? It’s free (and no phone number required)! Register today. :{>...(read more)

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  • Not Provide count has reached 80%! But what about remaining 20?

    - by Rajesh Magar
    I am updated with all not-provided reasons as Google has encrypted their all searches, but here is the little question banging again and again in my head. That if all search results has encrypted with HTTPS protocol then how did Google analytics still able to track some of (20%) organic keywords details? I means their still some keywords appreading in my organic keywords section. So how did Google analytics track or bypass that HTTPS thing? Thanks in advance!

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  • Avoid double compression of resources

    - by user1095108
    I am using .pngs for my textures and am using a virtual file system in a .zip file for my game project. This means my textures are compressed and decompressed twice. What are the solutions to this double compression problem? One solution I've heard about is to use .tgas for textures, but it seems ages ago, since I've heard that. Another solution is to implement decompression on the GPU and, since that is fast, forget about the overhead.

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  • Small Business Web Design - On Page SEO - Let's Talk Keywords

    If your website was designed by a professional designer, chances are you were told that they have included SEO for your keywords as part of the package. Unfortunately, that generally means you have no SEO on the page. You see, web designers are very skilled at what they do best, but SEO is not one of those skills unless they have specialised in learning the search engines.

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  • I'm trying to understand hash tables - can someone explain it to me - clearly?

    - by Stevo
    I want to understand the correct use and implementation of hash tables in php (sorry). I read somewhere that an in-experienced programmer created a hash table and then iterated through it. Now, I understand why that is wrong but I haven't quite got the full knowledge to know if my understanding is correct (if you know what I mean). So could someone explain to me how to implement a hash table in php (presumably an associative array) and perhaps more importantly, how to access the values 'with a hash' and what that actually means?

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  • Know More About SEO Software

    SEO optimization is very essential to people who are looking for the current means to enhance the popularity of their sites on the internet. The SEO tool is one that delivers the success of your site and at the same time ensures that you get targeted traffic with ease. There is immense competition on the internet and it is for this reason why you should go in for SEO optimization so that you can have a winning edge over the other players in the online market.

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  • Why are source control systems still mostly backed with files?

    - by Andy
    It seems that more source control systems still use files as the means of storing the version data. Vault and TFS use Sql Server as their data store, which I would think would be better for data consistency as well as speed. So why is it that SVN, I believe GIT, CVS, etc still use the file system as essentially a database, (I ask this question as we had our SVN server just corrupt itself during a normal commit) instead of using actual database software (MSSQL, Oracle, Postgre, etc)?

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  • How do PGP and PEM differ?

    - by Dummy Derp
    Email messages are sent in plain text which means that the messages I send to Derpina are visible to anyone who somehow gets access to them while they are in transit. To overcome this, various encryption mechanisms were developed. PEM and PGP are two of them. PEM - canonically converts-adds digital signature-encrypts and sends PGP does exactly the same. So where do they differ? Or is it that PGP (being a program) is used to generate a PEM message?

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  • kernel panic- not syncing: attempted to kill init!

    - by Jill
    I am not very technical. My system has frozen 3 times in March--- this is what was on screen... Ubuntu 10.04.4 LTS Admin.sybalsky.com tty1 admin.sybalsky.com login: [683454.747106] kernel panic- not syncing: attempted to kill init! I know the system is running: Linux admin.sybalsky.com 2.6.32-40-generic-pae #87-Ubuntu SMP Mon Mar 5 21:44:34 UTC 2012 i686 GNU/Linux Ubuntu 10.04.4 LTS Can you tell me what this all means and why it is happening and what can I do about it?

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  • 5 Cmdlets to Get You Started with PowerShell

    - by Taylor Gibb
    PowerShell is quickly becoming the preferred scripting language and CLI of Power Users as well as IT Pros. It’s well worth learning a few commands to get you started, so we’ve got 5 useful cmdlets for you to learn today. HTG Explains: What Is Windows RT and What Does It Mean To Me? HTG Explains: How Windows 8′s Secure Boot Feature Works & What It Means for Linux Hack Your Kindle for Easy Font Customization

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  • What are the drawbacks of sending XML to browsers and let them apply XSLT?

    - by MainMa
    Context Working as a freelance developer, I often made websites completely based on XSLT. In other words, on every request, an XML file is generated, containing everything we need to know about the page content: the name of the user currently logged in, the top menu entries, if this menu is dynamic/configurable, the text to display in a specific area of the page, etc. Then XSL process (caches, etc.) it to HTML/XHTML page to send to the browser. It has a good point to make it easier to create small-scale websites, especially with PHP. It is a sort of template engine, but which I prefer to other template engines because it's much more powerful than most of template engines, and because I know it better and like it. It is also possible, when need, to give an access to raw XML data on demand for an automated access, without the need to create separate APIs. Of course, it will fail completely on any medium-scale or large-scale website, since, even with good caching techniques, XSL still degrades overall website performance and requires more CPU serverside. Question Modern browsers have the ability to take an XML file and to transform it with an associated XSL file declared in XML like <?xml-stylesheet href="demo.xslt" type="text/xsl"?>. Firefox 3 can do it. Internet Explorer 8 can do it too. It means that it is possible to migrate XSL processing from the server to the client side for 50% of users (according on browser statistics on several websites where I may want to implement this). It means that those 50% of users will receive only the XML file at each request, thus reducing their and server's bandwidth (XML file being much shorter than its processed HTML analog), and reducing server's CPU usage. What are the drawbacks of this technique? I thought about several ones, but it doesn't apply in this situation: Difficult implementation and the need to choose, based on the browser request, when to send raw XML and when to transform it to HTML instead. Obviously, the system will not be much more difficult then the actual one. The only change to make is to add XSL file link to every XML, and to add a browser check. More IO and bandwidth usage, since the XSLT file will be downloaded by the browsers, instead of being cached by the server. I don't think it will be a problem, since XSLT file will be cached by the browsers (like images, or CSS, or JavaScript files are cached actually). Possibly some problems on client side, like maybe problems when saving a page in some browsers. Difficulty to debug code: it is impossible to obtain an HTML source the browser is actually using, since the only displayed source is the downloaded XML. On the other hand, I rarely go look at HTML code on client side, and in most cases, it is unusable directly (whitespace being removed).

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