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  • Using an Apt Repository for Paid Software Updates

    - by Scott Warren
    I'm trying to determine a way to distribute software updates for a hosted/on-site web application that may have weekly and/or monthly updates. I don't want the customers who use the on-site product to have to worry about updating it manually I just want it to download and install automatically ala Google Chrome. I'm planning on providing an OVF file with Ubuntu and the software installed and configured. My first thought on how to distributed software is to create six Apt repositories/channels (not sure which would be better at this point) that will be accessed through SSH using keys so if a customer doesn't renew their subscription we can disable their account: Beta - Used internally on test data to check the package for major defects. Internal - Used internally on live data to check the package for defects (dog fooding stage). External 1 - Deployed to 1% of our user base (randomly selected) to check for defects. External 9 - Deployed to 9% of our user base (randomly selected) to check for defects. External 90 - Deployed to the remaining 90% of users. Hosted - Deployed to the hosted environment. It will take a sign off at each stage to move into the next repository in case problems are reported. My questions to the community are: Has anyone tried something like this before? Can anyone see a downside to this type of a procedure? Is there a better way?

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  • The problems with Avoiding Smurf Naming classes with namespaces

    - by Daniel Koverman
    I pulled the term smurf naming from here (number 21). To save anyone not familiar the trouble, Smurf naming is the act of prefixing a bunch of related classes, variables, etc with a common prefix so you end up with "a SmurfAccountView passes a SmurfAccountDTO to the SmurfAccountController", etc. The solution I've generally heard to this is to make a smurf namespace and drop the smurf prefixes. This has generally served me well, but I'm running into two problems. I'm working with a library with a Configuration class. It could have been called WartmongerConfiguration but it's in the Wartmonger namespace, so it's just called Configuration. I likewise have a Configuration class which could be called SmurfConfiguration, but it is in the Smurf namespace so that would be redundant. There are places in my code where Smurf.Configuration appears alongside Wartmonger.Configuration and typing out fully qualified names is clunky and makes the code less readable. It would be nicer to deal with a SmurfConfiguration and (if it was my code and not a library) WartmongerConfiguration. I have a class called Service in my Smurf namespace which could have been called SmurfService. Service is a facade on top of a complex Smurf library which runs Smurf jobs. SmurfService seems like a better name because Service without the Smurf prefix is so incredibly generic. I can accept that SmurfService was already a generic, useless name and taking away smurf merely made this more apparent. But it could have been named Runner, Launcher, etc and it would still "feel better" to me as SmurfLauncher because I don't know what a Launcher does, but I know what a SmurfLauncher does. You could argue that what a Smurf.Launcher does should be just as apparent as a Smurf.SmurfLauncher, but I could see `Smurf.Launcher being some kind of class related to setup rather than a class that launches smurfs. If there is an open and shut way to deal with either of these that would be great. If not, what are some common practices to mitigate their annoyance?

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  • SQL Server Instancing: Should I use multiple instances or databases?

    - by Spence
    I have a reasonable server connected to a SAN which will be running SQL servers for multiples of the same application. There are no security issues with one application being able to read anothers database. We are unfortunately in 32 bit windows as well. I'm of the opinion that it would be better to use one instance on the server, enable AWE so that the server instance can use almost all of the ram we have and then run each of the databases in the one instance. However I've been overruled by the gods of the IT department on this one, so I'm really curious to hear your thoughts on this. From a performance point of view, am I incorrect that one instance of SQL is better than two? I know that we could do some failover stuff, but doing that on one blade only seems like overkill to me..

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  • CodePlex Daily Summary for Tuesday, October 02, 2012

    CodePlex Daily Summary for Tuesday, October 02, 2012Popular ReleasesZ3: Z3 4.1.1 source code: Snapshot corresponding to version 4.1.1.DirectX Tool Kit: October 2012: October 2, 2012 Added ScreenGrab module Added CreateGeoSphere for drawing a geodesic sphere Put DDSTextureLoader and WICTextureLoader into the DirectX C++ namespace Renamed project files for better naming consistency Updated WICTextureLoader for Windows 8 96bpp floating-point formats Win32 desktop projects updated to use Windows Vista (0x0600) rather than Windows 7 (0x0601) APIs Tweaked SpriteBatch.cpp to workaround ARM NEON compiler codegen bugHome Access Plus+: v8.1: HAP+ Web v8.1.1003.000079318 Fixed: Issue with the Help Desk and updating a ticket as an admin 79319 Fixed: formatting issue with the booking system admin header 79321 Moved to using the arrow with a circle symbol on the homepage instead of the > and < 79541 Added: 480px wide mobile theme to login page 79541 Added: 480px wide mobile theme to home page 79541 Added: slide events for homepage 79553 Fixed: Booking System Multiple Lesson Bug 79553 Fixed: IE Error Message 79684 Fixed: jQuery issue ...Tabular Database Powershell Cmdlets: AdventureWorks Tabular PowerShell 2012 test script: AdventureWorks Tabular PowerShell 2012.ps1 is a testing script to verify the functionality of the 'Tabular Database PowerShell Cmdlets'. This script recreates parts of AdventureWorks Tabular 2012 Model; to run the script you need access to a relational database and have access to 'AdventureWorksDW2012'.CRM 2011 Visual Ribbon Editor: Visual Ribbon Editor (1.3.1002.3): Visual Ribbon Editor 1.3.1002.3 What's New: Multi-language support for Labels/Tooltips for custom buttons and groups Support for base language other than English (1033) Connect dialog will not require organization name for ADFS / IFD connections Automatic creation of missing labels for all provisioned languages Minor connection issues fixed Notes: Before saving the ribbon to CRM server, editor will check Ribbon XML for any missing <Title> elements inside existing <LocLabel> elements...YAXLib: Yet Another XML Serialization Library for the .NET Framework: YAXLib 2.10: See change-log for the list of new features added and bugs fixedNaked Objects: Naked Objects Release 5.0.0: Corresponds to the packaged version 5.0.0 available via NuGet. Please note that the easiest way to install and run the Naked Objects Framework is via the NuGet package manager: just search the Official NuGet Package Source for 'nakedobjects'. It is only necessary to download the source code (from here) if you wish to modify or re-build the framework yourself. If you do wish to re-build the framework, consul the file HowToBuild.txt in the release. Major enhancementsNaked Objects 5.0 is desi...WinRT XAML Toolkit: WinRT XAML Toolkit - 1.3.0: WinRT XAML Toolkit based on the Windows 8 RTM SDK. Download the latest source from the SOURCE CODE page. For compiled version use NuGet. You can add it to your project in Visual Studio by going to View/Other Windows/Package Manager Console and entering: PM> Install-Package winrtxamltoolkit Features AsyncUI extensions Controls and control extensions Converters Debugging helpers Imaging IO helpers VisualTree helpers Samples Recent changes NOTE: Namespace changes DebugConsol...D3 Loot Tracker: 1.4.1: This version will automatically save a recording session on application exit if the user didn't stop the current session.Untangler: Untangler: First version of Untangler application available now.SubExtractor: Release 1029: Feature: Added option to make i and ¡ characters movie-specific for improved OCR on Spanish subs (Special Characters tab in Options) Feature: Allow switch to Word Spacing dialog directly from Spell Check dialog Fix: Added more default word spacings for accented characters Fix: Changed Word Spacing dialog to show all OCR'd characters in current sub Fix: Removed application focus grab during OCR Fix: Tightened HD subs fuzzy logic to reduce false matches in small characters Fix: Improved Arrow k...MCEBuddy 2.x: MCEBuddy 2.2.18: Reccomended download Changelog for 2.2.18 (32bit and 64bit) 1. Added support for checking if Showanalyzer has hung and cancelling it 2. New version of comskip, 0.81.48 3. Speeding up comskip 4. Fixed a build bug in 64bit 2.2.17 5. Added a new comkip.ini, better commercial detection for international channels and less aggressive. Old one has been retained as comskip_old.ini 6. Added support for Audio Offset on Conversion Task page in GUI (this overrides the profiles AudioDelay when specified)Mugen Injection: Mugen Injection 3.0: Added a generic version of the fluent syntax. Big changes in fluent-syntax. Added support to resolve a parameters: - Factory: AnyCustomFunc{T}, AnyCustomFunc{IEnumerable<IInjectionParameters>,T}, AnyCustomFunc{IDictionary<string, object>,T}, AnyCustomFunc{IEnumerable<IInjectionParameters>,IDictionary<string, object>,T} - Lazy: AnyCustomLazy<T> - Binding metadata: ISetting Change binding builders, now you can configure them through the string settings. Increase performance. F...Readable Passphrase Generator: KeePass Plugin 0.7.1: See the KeePass Plugin Step By Step Guide for instructions on how to install the plugin. Changes Built against KeePass 2.20Pentagon-XnaGamePrototype: Pentagon_Application: -Windows 8 Toolkit - Charts and More: Beta 1.0: The First Compiled Version of my LibraryPDF.NET: PDF.NET.Ver4.5-OpenSourceCode: PDF.NET Ver4.5 ????,????Web??????。 PDF.NET Ver4.5 Open Source Code,include a sample Web application project.Visual Studio Icon Patcher: Version 1.5.2: This version contains no new images from v1.5.1 Contains the following improvements: Better support for detecting the installed languages The extract & inject commands won’t run if Visual Studio is running You may now run in extract or inject mode The p/invoke code was cleaned up based on Code Analysis recommendations When a p/invoke method fails the Win32 error message is now displayed Error messages use red text Status messages use green textZXing.Net: ZXing.Net 0.9.0.0: On the way to a release 1.0 the API should be stable now with this version. sync with rev. 2393 of the java version improved api better Unity support Windows RT binaries Windows CE binaries new Windows Service demo new WPF demo WindowsCE Hotfix: Fixes an error with ISO8859-1 encoding and scannning of QR-Codes. The hotfix is only needed for the WindowsCE platform.Picturethrill: Version 2.9.25.0: Allowing to run Picturethrill Update task while computer is not connected to internet on computer wake up.New ProjectsAssociativy Neo4j Driver: Neo4j graph database driver for Associativy. See: http://associativy.comCalcSig: Utility for identifying near-duplicate audio and image files.CTODO: TODO List management utilityEstudosSedna: goto HomeFun-Beat: Fun-Beat is a free XAudio2 based Drum-Machine/synthesizer in its initial phasesgbtest: This is a demoGlobal Stock Exchange (Hobby Project): GSE is sort of a hobby project. Global Stock Exchange has a rich dynamic UI. A number of concurrent multi-threaded actions are going on behind the scene.HealthVault Library for Windows 8: This library provides a simple framework for building Windows Store applications that connect to Microsoft HealthVault. Homework management: Házi feladat beadó rendszer megvalósításaHostalApp: Proyecto de Taller de Sistemas de InformacionIIS Logfile Archiving: IIS instances log website activity to disk. Let's archive those files for later in a .zip file.Impact Bootstrap For Windows 8: Impact Bootstrap for Windows 8 is a simple collection of scripts, code and stock art/sounds that can help you create HTML5 games on Windows 8 faster.Innovacall ASP.net MVC 3 Framework and Starter Kits: Innovacall Open Source Development Framework for Asp.Net MVC 3.1.JRFinances: Financial project for university graduationLazyField Demo: A demo module demonstrating the LazyField<T> class in Orchard.Lilith: Linux libraryManaged Metadata Migrator: Move term sets across SharePoint farms, managed metadata service applications or groups with term GUIDs intact.MyFamily: An ASP.net application for families to share pictures/videos/events with one anotherNengraphy: Nengraphy Gentoo OverlayOrchard CMS Image MultiPicker Field: This module provides image multi picker field for Orchard CMS 1.5.1.PDFWebViewer.NET 1.0: As of October 1st, 2012 TallComponents has discontinued PDFWebViewer.NET 1.0. This project publishes the 1.0.21.0 source code.PromikeHomeSite: My home site.Sharepoint Dynamic Quicklaunch: Sharepoint Dynamic Quicklaunch is a jquery plugin to generate dynamic menus for the Sharepoint 2010 Quicklaunch. Slider - Simple Slideshow Solution: Highly customizable slideshow solution for any website.TypeScript: TypeScript is a language for application-scale JavaScript development. TypeScript is a typed superset of JavaScript that compiles to plain JavaScript.Velocity4Net: translated from apache velocity 1.7WebViewer.NET 2.0: As of October 1st, 2012 TallComponents has discontinued WebViewer.NET 2.0. This project publishes the 2.0.0.3 source code.WireBear InfoPath Printer: Adds a print button to the ribbon for InfoPath List Display Forms in SharePoint 2010.YingEngine2: ??????????????。 ??????????,???,???????RPG??。?????????????????,???????????????????,???????????。

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  • How to organize a programming course?

    - by Bogdan Gavril
    I've been given the task to train our manual testers to become developers in test (write test automation!). some have basic programing knowledge (either dabbling in PHP or reading stuff) and some who have no experience. Note that I do have teaching experience, but with real students, not employees, and one concern is that they will not put extra hours except the 20% management gave them for the transition. Language to be taught and used: C# We have 8 hours per week to do this and should decide if they will make it in 2 months. I am thinking of a combined approach: use a manual such as Head First C# (although I'm not happy with the labs, they're mostly games and I don't want to add UI complexities) have them read from the manual do labs with them, solving more and more difficult problems and explain the theoretical stuff as well have them do a bigger project towards the end Some questions: do you have a better suggestion as far as manuals go? do you have a better aproach? Focus less on labs? what kind of assesments should I use and how often? should I let them do a bigger project (bank system or small game) and how much time should I invest in that? ideeas on labs? other resources ? Any other tips would be most welcomed! Thanks!

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  • Any reason not to disable the Windows pagefile given enough physical RAM?

    - by Evgeny
    The question of disabling the Windows pagefile has already been discussed quite a bit, for example here and here and here. People continue to upvote answers that say "you should not disable your pagefile even if you have plenty of RAM", but I have yet to see any concrete, verifiable reasons being given for this advice. As far as I can see, if you never need to read from the pagefile (because you have enough RAM) then performance could only be worse with it enabled due to Windows pre-emptively writing to it. At best, performance would be the same. I can't see how it could possibly be improved by writing data you never need to read. So my question is: Assuming that I have enough physical RAM for everything I do, is there any reason I should not disable the pagefile? Let's say the version of Windows is Windows XP x64 SP2 or Windows Server 2003 x64 SP2 (same thing). If it's different for Windows Server 2008 x64 I'd be interested to hear an answer for that as well. I'm looking for specific, objective reasons from good sources, not just opinions. Something like "here are the benchmarks done with and without a pagefile and the results were better with a pagefile, even with enough RAM" or "according to this MS KB article problem X occurs if you disable the pagefile". So far the only reasons I've seen mentioned are: Even if you think you have enough RAM you might run out. OK, but for the purposes of this question, let's just take it as a given that I have enough. Maybe I only ever read my email and I have 16GB RAM. Or 128GB. Or 1TB. Or whatever - but it's enough for 100% of what I do, 100% of the time. Another way to think of it is: if I have x MB physical RAM and y MB pagefile and I never run out of RAM in that configuration, would I not be better off, performance-wise, with x+y MB physical RAM and no pagefile? Windows is "used to" having a paging file and it might not function as reliably (from Understanding the Impact of RAM on Overall System Performance That's rather vague and I find it hard to believe, given that MS has provided the option to disable the pagefile. Windows knows what it's doing better than you. No - it doesn't know that I won't run more programs or load more data, but I do.

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  • Empirical evidence for choice of programming paradigm to address a problem

    - by Graham Lee
    The C2 wiki has a discussion of Empirical Evidence for Object-Oriented Programming that basically concludes there is none beyond appeal to authority. This was last edited in 2008. Discussion here seems to bear this out: questions on whether OO is outdated, when functional programming is a bad choice and the advantages and disadvantages of AOP are all answered with contributors' opinions without reliance on evidence. Of course, opinions of established and reputed practitioners are welcome and valuable things to have, but they're more plausible when they're consistent with experimental data. Does this evidence exist? Is evidence-based software engineering a thing? Specifically, if I have a particular problem P that I want to solve by writing software, does there exist a body of knowledge, studies and research that would let me see how the outcome of solving problems like P has depended on the choice of programming paradigm? I know that which paradigm comes out as "the right answer" can depend on what metrics a particular study pays attention to, on what conditions the study holds constant or varies, and doubtless on other factors too. That doesn't affect my desire to find this information and critically appraise it. It becomes clear that some people think I'm looking for a "turn the crank" solution - some sausage machine into which I put information about my problem and out of which comes a word like "functional" or "structured". This is not my intention. What I'm looking for is research into how - with a lot of caveats and assumptions that I'm not going into here but good literature on the matter would - certain properties of software vary depending on the problem and the choice of paradigm. In other words: some people say "OO gives better flexibility" or "functional programs have fewer bugs" - (part of) what I'm asking for is the evidence of this. The rest is asking for evidence against this, or the assumptions under which these statements are true, or evidence showing that these considerations aren't important. There are plenty of opinions on why one paradigm is better than another; is there anything objective behind any of these?

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  • Video memory buswidth vs video memory Bandwidth

    - by Mixxiphoid
    My current video card (9600GT) is dying and I'm searching for a new video card. Between acquiring my current one and now, I got a lot more knowledge about hardware and I want to use that to pick my new card. So I decided to not just buy some popular card blindly, but to search for a card able to handle my hardware requirements. I searched the specs at the NVidia site for the GT640 and was confused by the memory section and some questions raised. My current card's memory bus width is 256bit and has 1GB of memory. I checked Google about the importance of bus width. And all the links basically said the same 'The higher the number the more potential simultaneously traffic can be transferred'. This was already clear to me, yet there are currently a lot of new cards which are considered better than my current one with a lower bus width. To go in more detail about my question I copied the memory info from the NVidia site: GT 640 GT640 GDDR5 Memory Specs: Memory Clock 1.8 Gbps 5.0 Gbps Standard Memory Config 2048 MB 1024 MB Memory Interface DDR3 GDDR5 Memory Interface Width 128-bit 64-bit Memory Bandwidth (GB/sec) 28.5 40.0 What puzzled me is that the Memory Bandwidth seems to me the most important part, yet the lower bus width has the higher 'performance'. Is this due to the fact the memory interface is GDDR5 and is therefore able to have a higher memory clock speed (5Gbps)? If I am to buy a new video card, should I check the bus width? Memory clock? Bandwith? Amount of memory? My current card ahs 1GB memory, so I was searching for a 2GB memory card, but now I'm not so sure any more whether that is really 'better'. My main question: To me it seems that memory performance is made up by the combination of bus width and frequency. Is this true? If yes, why are there so many sites telling me I need to get a card with a high bus width? If no, then what IS important when it goes about memory performance on a video card. NOTE: The memory bandwidth is (almost) never displayed on vendor sites. How can I determine which card is better without knowing the bandwith?

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  • Is it more valuable to double major in Computer Science/Software Engineering or get an undergraduate CS degree with a Masters in SE?

    - by Austin Hyde
    A friend and I (both in college) are currently in a debate over which is better, in terms of employment opportunities, experience, and education: a Bachelors degree in both Computer Science and Software Engineering, or a Bachelors in Computer Science with a Masters in Software Engineering. My point of view is that I would rather go to school for 4-4.5 years to learn both sides of the field, and be out working on real projects gaining real experience, by going the double major route. His point of view is that it would look better to potential employers if he had a Bachelors in CS and Masters in SE. That way, when he's finally done after 4 years of CS and 2-4 of SE (depending on where he goes), he can pretty much have his choosing of what he wants to do. We are both in agreement on the distinction between the two degrees: CS is "traditional" and about the theory of algorithms, data structures, and programming, where SE is the study of the design of software and the implementation of CS theory. So, what's your stance on this debate? Have you gone one route or another? And most importantly, why?

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  • Matte or non-widescreen laptop? Do they exist?

    - by Alan Harris-Reid
    Does anyone know of any matte-screen laptops being sold now (15.6 or 17") in the UK? All I can find is the Dell Vostro 3500/3700 range, but there is a premium of around £200 over the price of their Inspiron range (for the 17" model), and I find it hard justifying the extra cost just to have a matte screen. I do not like glossy screens, but it seems the laptop industry has gone the way of "glossy is better - let's get rid of matte". I have read and heard from other developers that as long as there are no strong light sources to reflect off the screen, one can soon get used to a glossy screen, but I am yet to be convinced. I would also be interested if anyone knows of any non 16:9 screen laptops. I find this ratio too wide and not high-enough for the work I do. 16:10 or lower would be better. Any opinions would be appreciated. Alan

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  • RAID - software vs. hardware

    - by Robert MacLean
    I have always used hardware based raid because it (IMHO) it's on the right level (feel free to dispute this) and that OS failures are more common to me than hardware issues. Thus if the OS fails the raid is gone and so is the data, where on a hardware level regardless of OS the data remains. However on a recent Stack Overflow podcast they stated they would not used hardware raid as the software raid is better developed and thus runs better. So my question is, is there any reasons to choose one over the other?

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  • C++ and function pointers assessment: lack of inspiration

    - by OlivierDofus
    I've got an assessment to give to my students. It's about C++ and function pointers. Their skill is middle: it the first year of a programming school after bachelor. To give you something precise, here's a sample of a solution of one of 3 exercices they had to do in 30 minutes (the question was: "here's a version of a code that could be written with function pointers, write down the same thing but with function pointers"): typedef void (*fcPtr) (istream &); fcPtr ArrayFct [] = { Delete , Insert, Swap, Move }; void HandleCmd (const string && Cmd) { string AvalaibleCommands ("DISM"); string::size_type Pos; istringstream Flux (Cmd); char CodeOp; Flux >> CodeOp; Pos = AvalaibleCommands.find (toupper (CodeOp)); if (Pos != string::npos) { ArrayFct [Pos](Flux); } } Any idea where I could find some inspiration? Some of the students have understood the principles, even though it's very hard for them to write C++ code. I know them, I know they're clever, and I'm pretty sure they should be very good project managers. So, writing C++ code is not that important after all. Understanding is the most important part (IMHO). I'm wondering about maybe break the habits, and give half of the questions about the principle, or even better, give some sample in other language and ask them why it's better to use function pointers instead of classical programming (usually a big switch case). Any idea where I could look? Find some inspiration?

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  • subnetting a class c on a cisco 3825

    - by Adeodatus
    I have a class C that I want to better understand before I implement a change. Right now, ip address 192.168.0.1 255.255.255.192 ip address 192.168.0.65 255.255.255.240 secondary So, where is the 192.168.0.64 address in that mix? 192.168.0.63 should be the broadcast for the first one, and 192.168.0.65 should be the cisco secondary ip. And ... How then do I add a /28 (255.255.255.240) right before this segment: ip address 192.168.0.249 255.255.255.248 secondary In fact, I'll probably want to add it as a subinterface Can anyone help me to better understand whats going on and then how to do it?

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  • TCP/IP & throughput between FreeNAS (BSD) server & other LAN machines

    - by Tim Dickerson
    I have got a question for someone that knows BSD a bit better than me that are in regards to my LAN setup at home/work here outside Chicago. I can't seem to fully optimize my network's (LAN) thoughput via my FreeNAS (BSD based) file server. It runs with the latest FreeBSD release which is modified to support several protocols for file transfers and more. Every machine that is behind my Smoothwall (Linux based) router is on the usual 192.168.0.x subnet and for most part works just fine. Behind the Smoothwall box, all machines are connected to a GB HP unmanaged switch. I host a large WISP here and have an OC-3 connection here at home/work and have no issues with downloading/uploading from/to the 'net'. My problem is with throughput. When I try and transfer large files...really any for that matter..between any of the machines to/and from the FreeNAS server via FTP, the max throughput I can achieve say between a Win 7 or a Linux box is ~65Mbit/sec. All machines are running Intel Pro 1000 GB NIC's and all cable is CAT6. Each is set to 'auto negotiation' and each shows 1500 MTU Full Duplex @1GB so I know the hardware is okay. I have not adjusted the MTU on any machine as I understand it to be pointless unless certain configurations are used (I assume I am not one of those). My settings for the FreeNAS machine are the following: # FreeNAS /etc/sysctl.conf - pertinent settings shown kern.ipc.maxsockbuf=262144 kern.ipc.nmbclusters=32768 kern.ipc.somaxconn=8192 kern.maxfiles=65536 kern.maxfilesperproc=32768 net.inet.tcp.delayed_ack=0 net.inet.tcp.inflight.enable=0 net.inet.tcp.path_mtu_discovery=0 net.inet.tcp.recvbuf_auto=1 net.inet.tcp.recvbuf_inc=524288 net.inet.tcp.recvbuf_max=16777216 net.inet.tcp.recvspace=65536 net.inet.tcp.rfc1323=1 net.inet.tcp.sendbuf_inc=16384 net.inet.tcp.sendbuf_max=16777216 net.inet.tcp.sendspace=65536 net.inet.udp.recvspace=65536 net.local.stream.recvspace=65536 net.local.stream.sendspace=65536 net.inet.tcp.hostcache.expire=1 From what I can tell, that looks to be a somewhat optimized profile for a typical BSD machine acting as a server for a LAN. I might be wrong and just wanted to find out from someone that knows BSD better than I do if indeed that is ok or if something is out of tune or what. Are there other ways I would find better for P2P file transfers? I honestly do not know what I SHOULD be looking for with respect to throughput between the NAS box and another client when xferring files via FTP, but I am told that what I get on average (40-70MB/sec) is too low for what it could be. I have thought about adding another NIC in the FreeNAS box as well as the Win7 machine and use a X-over cable via a static route, but wanted to check with someone first to see if that might be worth it or not. I don't know if doing that would bypass the HP GB switch and allow for a machine to machine xfer anyways. The FTP client I use is: Filezilla and have tried both active and passive modes with no real gain over each other. The NAS box runs ProFTPD.

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  • Computer becomes very slow (permanently) after running a bunch of apps

    - by djzmo
    Hello there, My computer with Windows XP installed becomes very slow after I ran some heavy tasks at a time. (play a full 3D online game while extracting a 4GB RAR archive) It freezes for about 200~500ms every few seconds, and this always happens if I do heavy tasks at once in my computer (for example, installing a program while playing games), and the lag remains permanently (even a reboot won't make it better) unless I repair-install the Windows. Since I have a low-end computer: Intel(R) Pentium(R) 4 CPU 2.00 GHz, 512 MB of RAM ATI RADEON 9550 AGP 256 MB And the only way I used everytime to fix this problem is by repair-installing my Windows XP. So that I won't lose any data or installed programs. But I believe there's a better and faster way to fix this without repair-installing the Windows. Any idea?

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  • Java game object pool management

    - by Kenneth Bray
    Currently I am using arrays to handle all of my game objects in the game I am making, and I know how terrible this is for performance. My question is what is the best way to handle game objects and not hurt performance? Here is how I am creating an array and then looping through it to update the objects in the array: public static ArrayList<VboCube> game_objects = new ArrayList<VboCube>(); /* add objects to the game */ while (!Display.isCloseRequested() && !Keyboard.isKeyDown(Keyboard.KEY_ESCAPE)) { for (int i = 0; i < game_objects.size(); i++){ // draw the object game_objects.get(i).Draw(); game_objects.get(i).Update(); //world.updatePhysics(); } } I am not looking for someone to write me code for asset or object management, just point me into a better direction to get better performance. I appreciate the help you guys have provided me in the past, and I dont think I would be as far along with my project without the support on stack exchange!

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  • Design Application to "Actively" Invite Users (pretend they have privileges)

    - by user3086451
    I am designing an application where users message one another privately, and may send messages to any Entity in the database (an Entity may not have a user account yet, it is a professional database). I am not sure how to best design the database and the API to allow messaging unregistered users. The application should remain secure, and data only accessed by those with correct permissions. Messages sent to persons without user accounts serve as an invitation. The invited person should be able to view the message, act on it, and complete the user registration upon receiving an InviteMessage. In simple terms, I have: User misc user fields (email, pw, dateJoined) Entity (large professional dataset): personalDetails... user->User (may be null) UserMessage: sender->User recipient->User dateCreated messageContent, other fields..... InviteMessage: sender->User recipient->Entity expiringUrl inviteeEmail inviteePhone I plan to alert the user when selecting a recipient that is not registered yet, and inform that he may send the message as an invitation by providing email, phone where we can send the invitation. Invitations will have a unique, one-time-use URL, e.g. uuid.uuid4(). When accessed, the invitee will see the InviteMessage and details about completing his/her registration profile. When registration is complete, InviteMessage details to a new instance of UserMessage (to not lose their data), and assign it to the newly created User. The ability to interact with and invite persons who do not yet have accounts is a key feature of the application, and it seems better to separate the invitation from the private, app messages (easier to keep functionality separate, better if data model changes). Is this a reasonable, good design? If not, what would you suggest? Do you have any improvements? Am I correct to choose to create a separate endpoint for creating invitations via the API?

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  • How to add PTR record for a /16 IP block in BIND using $GENERATE directive?

    - by yegle
    I'm trying to reverse map a block of IP using PTR record to some special name so their usage can be easily reflected by a simple nslookup. For example, here's a nslookup result: # nslookup 172.17.201.101 Server: 10.253.33.1 Address: 10.253.33.1#53 101.201.17.172.in-addr.arpa name = for.internal.use.only. And I learned that I can add PTR record for a /24 block by using $GENERATE directive $GENERATE 0-254 $.201.17.172 PTR for.internal.use.only. So here's the question: Am I doing right exposing infomation of IP address by adding PTR record? Any better idea? If the question above is YES, then how to add PTR record for a /16 IP range? I know I can write 255 lines of $GENTERATE directive but any better solution?

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  • Inheriting projects - General Rules? [closed]

    - by pspahn
    Possible Duplicate: When is a BIG Rewrite the answer? Software rewriting alternatives Are there any actual case studies on rewrites of software success/failure rates? When should you rewrite? We're not a software company. Is a complete re-write still a bad idea? Have you ever been involved in a BIG Rewrite? This is an area of discussion I have long been curious about, but overall, I generally lack the experience to give myself an answer that I would fully trust. We've all been there, a new client shows up with a half-complete project they are looking to finish and launch. For whatever reason, they fired their previous developer, and it's now up to you to save the day. I am just finishing up a code review for a new client, and in my estimation is would be better to scrap what the previous developers built since and start from scratch. There's a ton of reasons why I am leaning toward this way, but it still makes me nervous since the client isn't going to want to hear "those last guys built you a big turd, and I can either polish it, or throw it in the trash". What are your general rules for accepting these projects? How do you determine whether it will be better to start from scratch or continue with the existing code base? What other extra steps might you take to help control client expectations, since the previous developer may have inflated those expectations beyond a reasonable level? Any other general advice?

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  • new project; entire node.js app

    - by Jared
    I have been looking into Node.js, express and Nowjs and love how easy it is to have real time interactions between clients. My background is mostly from CodeIgniter MVC using PHP and MYSql. I want to re make a current web project of mine from scratch to make everything better and more real time with this newer technology. After researching and doing test examples I want to use node.js , express and Nowjs for the real time interactions once someone connects to the socket.io to pull data back to clients. But use Code Igniter for the control of the site and user management , possible shopping cart/store , pretty much everything else. This is purely due to time constraints and that I am already familiar with doing it that way. I have been looking at MongoDB as an alternative to MySql, Basically the app is going to be multiple chat rooms all on one page. with the ability of notifications and private messaging. Lots of data transfer and images. before I started piecing it together I wanted to get people who have already done something similar. My model would use Code Igniter and MySQL to render the page and then connect them onto a node.js server and broadcast using express and nowjs would using a mongoDB be better than mySQL for tons of messages and data being stored or MYSQL? Also does it make since to not make the whole site on Node.js , kinda piece it together like that? I was asked to re post this somewhere else as it was not up to the format for SO, OP from here http://stackoverflow.com/questions/12649469/new-project-need-some-start-up-advice-node-js-app#comment17062924_12649469

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  • What are the best ways to professionally increase your online presence?

    - by Rob S.
    I've been hunting around the job market for a little bit now and I've been shocked by some of the things I am seeing. Software developers who make themselves more "known" online are getting far more and far better positions than people competing against them who are not as well "known" online. After doing some reading on the subject I realized that I actually shouldn't be so shocked by this. We are living in the most fast paced era of mankind and employers want to be able to learn as much as they can about a potential employee before they hire them. The easier we as software developers make it for us to be found it seems the better are chances of landing that dream job become. In some cases, employers are even finding us instead of us applying to them. So what are some of the best ways for me as a software developer to increase my online presence? I already hang around stack exchange sites such as programmers and stack overflow increasing my rep whenever I can. I maintain many open source projects as both a committer and project owner on Google Code and Github. I have a Twitter account, a website, and a blog. What else can I do to give myself a bigger online presence? Additionally, are there any good do's and don'ts for handling your web presence? Bashing your employer is an obvious don't but I'm interested in everything from the most basic to most subtle suggestions to give yourself a more appealing online presence. Thank you very much in advance for your time.

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  • Is Movable Type among the most secure PHP blogs? How secure are the various PHP blog applications?

    - by user6025
    Basically I'm trying to find a blog for a website, and security is the highest priority in our case. We don't need any features that I would imagine are special. Wordpress was our first idea, but its reputation precedes it, and though it may have cleaned up its act lately, I'm not seeing much solid evidence. I get the impression that Movable Type (at least the Perl version) has a much better reputation for security than Wordpress (historically at least). I'm not sure I want to take a chance with Wordpress at this point, but is there some objective source I can got to to back up (or counter) the notion that MT is at least among the best? Secunia doesn't recommend using their stats for comparisons, and securityfocus.com doesn't have stats at all that I can see. Searching here http://web.nvd.nist.gov makes MT look way better than WP (at least in 2007), but this site was referenced by MT's own page boasting about their security, so I don't know how relevant it is or how seriously people take it. Any suggestions on sites where I could/should make a somewhat objective comparison?

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  • Distributed transactions and queues, ruby, erlang

    - by chrispanda
    I have a problem that involves several machines, message queues, and transactions. So for example a user clicks on a web page, the click sends a message to another machine which adds a payment to the user's account. There may be many thousands of clicks per second. All aspects of the transaction should be fault tolerant. I've never had to deal with anything like this before, but a bit of reading suggests this is a well known problem. So to my questions. Am I correct in assuming that secure way of doing this is with a two phase commit, but the protocol is blocking and so I won't get the required performance? It appears that DBs like redis and message queuing system like Rescue, RabbitMQ etc don't really help me a lot - even if I implement some sort of two phase commit, the data will be lost if redis crashes because it is essentially memory-only. All of this has led me to look at erlang - but before I wade in and start learning a new language, I would really like to understand better if this is worth the effort. Specifically, am I right in thinking that because of its parallel processing capabilities, erlang is a better choice for implementing a blocking protocol like two phase commit, or am I confused?

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  • How to create or recover Windows Bootloader after deleting Ubuntu boot drive

    - by Kincaid
    I have a computer that dual-boots (or tri-boots) Windows 8 Release Preview, Windows 7, and Ubuntu 12.04. Grub boots between Windows 8 and Ubuntu; for which I use primarily. Recently, I decided to remove Ubuntu, as I hardly used it. I deleted the Ubuntu partition accidentally before replacing the Grub bootloader. Now, whenever I want to boot the machine, it gives me the "grub-rescue" prompt -- I am unable to boot into either Windows (8 nor 7), nor Ubuntu (except via USB, of course). I do not have any Windows 7/8 recovery media, so that isn't an option. Please note that after I deleted the Ubuntu partition, I put the PC into hibernate, and then turned it on. This means the C:\ [Windows 8] drive cannot be mounted. I don't know if that is bad, but it definitely doesn't make things better. I am currently booting Ubuntu via USB, in an effort to restore the Windows bootloader. I have looked into using boot-repair to solve the problem using the instructions here, although after attempting to apply the changes, it gave the error: "Please install the [mbr] packages. Then try again." I don't know why I'm getting this error; is there a way to install the 'mbr packages?' I honestly don't know what exactly they are, nor how to install them. Are there any other options I have not yet exhausted to be able to boot back into Windows, in the case that there is a better way? I want to set the bootloader to boot into Windows 8, but booting into either Windows 7 or 8 is fine (I can use EasyBCD from there). Is there a simple solution to this? I've checked BIOS, and I haven't been able to find a way to boot into Windows.

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  • What techniques are used in solving code golf problems?

    - by Lord Torgamus
    "Regular" golf vs. code golf: Both are competitions. Both have a well-defined set of rules, which I'll leave out for simplicity. Both have well-defined goals; in short, "use fewer hits/characters than your competitors." To win matches, athletic golfers rely on equipment Some situations call for a sand wedge; others, a 9-iron. techniques The drive works better when your feet are about shoulder width apart and your arms are relaxed. and strategies Sure, you could take that direct shortcut to the hole... but do you really want to risk the water hazard or sand bunker when those trees are in the way and the wind is so strong? It might be better to go around the long way. What do code golfers have that's analagous to athletic golfers' equipment, techniques and strategies? Sample answer to get this started: use the right club! Choose GolfScript instead of C#.

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