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• Windows 7 Sharing issue on RAID 5 Array(s)

  - by K.A.I.N

  Greetings all, I'm having a very odd error with a windows 7 ultimate x64 system. The network system setup is as follows: 2x XP Pro 32 Bit machines 1x Vista ultimate x64 machine 2x Windows 7 x64 Ultimate machines all chained into 1x 16 port netgear prosafe gigabit switch, the windows 7 & vista machines are duplexed. Also there is a router (netgear Rangemax) chained off the switch I am basically using one of the windows 7 machines to host storage & stream media to other machines. To this end i have put 2x 3tb hardware RAID 5 arrays in it and assorted other spare disks which i have shared the roots of. The unusual problems start when i am getting Access denied, Please contact administrator for permission blah blah blah when trying to access both of the RAID 5 arrays but not the other stand alones. I have checked the permission settings, i have added everyone to the read permission for the root, i have tried moving things into sub directories then sharing them. I have tried various setting combinations in HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa and always the same. I have tried flushing caches all round, disabling and re-enabling shares & sharing after restart as well as several other things & the result is always the same... No problem on individual drives but access denied on both the RAID arrays from both XP & Vista & Windows 7 machines. One interesting quirk that may lead to an answer is that there is no "offline status" information regarding the folders when you select the RAID 5s from a windows 7 machine yet there is on the normal drives which say they are online. It is as if the raid is present but turned off or spun down but as far as i was aware windows will spin an array back up on network request and on the machine itself the drives seem to be online and can be accessed. Have to admit this has me stumped. Any suggestions anyone? Thanks in advance for any fellow geek assistance. K.A.I.N

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• ubuntu 12.04 kvm virtual server network setup, can't get the machine to be connectable

  - by xyious

  I have worked on my Ubuntu Server host for weeks now and I just can not manage to get the virtual machines into the network.... here's what I need to do: I need to be able to create virtual machines that have IP addresses that can be reached from the outside (192.168 network). I need to be able to connect to the virtual machines through ssh, ftp, http and preferably https, anything else doesn't matter that much. So far everything seems simple enough and I have a lot of leeway in terms of IP address range and server/client configuration. I have the option of taking part of a /24 net as most IPs aren't used, and if it's absolutely necessary I have the option of creating a new /24 subnet. Also have the option of reformatting and reinstalling OS on the host and recreating the virtual machines as nothing has been done other than trying to get virtual machines to work. I would prefer if the virtual machines were just part of the normal network which would be 192.168.5.0/24. The host machine has 2 network cards so I don't even necessarily need the Host to be connectable in the same /24 network. I have tried (I think) just about everything from about 5 different tutorials on bridging (giving br0 the same IP that eth0 used to have (Host is able to connect to VM and vice versa, VM doesn't have outside network access), having eth0 set up like it always was and having br0 have a different IP (same as above), NAT with port forwarding (which I would have preferred not to use but will if it works), turning off one of the hosts network cards and just using one of them, different subnets.... etc. I do know my way around iptables fairly well.... Host is 64bit Ubuntu Server 12.04, using libvirt/kvm. edits: Local network is 192.168.5.0/24, host has static ip 192.168.5.254, GW .5.1 which is also nameserver. We have a second Local network at 192.168.10.0/24 with .10.1 GW, but both hosts and VMs were supposed to go into the .5 subnet. The .10 subnet isn't required, but it wouldn't be horrible if the Host were only accessible in the .10 subnet.

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• Objective-measures of the expressiveness of programming languages [closed]

  - by Casebash

  I am very interested in the expressiveness of different languages. Everyone who has programmed in multiple languages knows that sometimes a language allows you to express concepts which you can't express in other languages. You can have all kinds of subjective discussion about this, but naturally it would be better to have an objective measure. There do actually exist objective measures. One is Turing-Completeness, which means that a language is capable of generating any output that could be generated by following a sequential set of steps. There are also other lesser levels of expressiveness such as Finite State Automata. Now, except for domain specific languages, pretty much all modern languages are Turing complete. It is therefore natural to ask the following question: Can we can define any other formal measures of expressiveness which are greater than Turing completeness? Now of course we can't define this by considering the output that a program can generate, as Turing machines can already produce the same output that any other program can. But there are definitely different levels in what concepts can be expressed - surely no-one would argue that assembly language is as powerful as a modern object oriented language like Python. You could use your assembly to write a Python interpreter, so clearly any accurate objective measure would have to exclude this possibility. This also causes a problem with trying to define the expressiveness using the minimum number of symbols. How exactly to do so is not clear and indeed appears extremely difficult, but we can't assume that just because we don't know how to solve a problem, that nobody know how to. It is also doesn't really make sense to demand a definition of expressiveness before answering the question - after all the whole point of this question is to obtain such a definition. I think that my explanation will be clear enough for anyone with a strong theoretical background in computer science to understand what I am looking for. If you do have such a background and you disagree, please comment why, but if you don't thats probably why you don't understand the question.

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• Network error during uninstallation

  - by varunp88

  Hi, We are using WiX to create a setup. The installation works fine, but during uninstallation an error says that the [FileName].msi is missing in C:\Windows\Installer and the setup starts rolling back. It is not reproduced in all the machines. It happens only in few machines. Could someone please give a solution to this ? What may be the reason that this happens only in 5 machines out of some 100 machines ? Thanks and Regards, Varun

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• Outlook Anywhere inconsistencies with authentication methods

  - by gravyface

  So I've read this question and attempted just about every other workaround I've found online. Problem seems completely illogical to me, anyways: SBS 2011, vanilla install; haven't touched anything in IIS or Exchange outside of what's been done through the checklist (brand new domain, completely new customer) except to import an existing wildcard certificate for *.example.com (which is valid, Remote Web Workplace and Outlook Web Access work fine). On the two test machines and one production machine running a mixture of Windows XP Pro, Windows 7 and Outlook 2003 through to 2010, I've had no problem saving the password after configuring Outlook Anywhere using the wrong authentication method. I repeat, I have had no issues using the wrong authentication method on these test machines; password saves the first time, no problem, can verify it exists in the credentials manager (Start Run control userpasswords2), close Outlook, reboot, go make a sammie, come back, credentials are still saved. When I say wrong, it's because I was choosing NTLM and Exchange (under Exchange Console Server Configuration Client Access) was set by default to use Basic. On two completely different machines setup by a co-worker, they had (under my guidance) used NTLM as well... except that frustratingly, Outlook would always ask for a password. One machine was Windows XP with Outlook 2010, the other was Windows 7 with Outlook 2003. When these two machines were set to use Basic -- the correct settings -- the option to save was there and now works without issue. Puzzled by how my machines could possibly work with the wrong authentication, I then went into one of them and changed the authentication method to Basic. Now here's where it gets a little crazy: if I go under Outlook and change the authentication to use the correct setting (Basic) it fails to save the password and Outlook prompts every time (without a "remember me" checkbox). I have not had a chance to change it to Basic on the other two machines to see if this is just a fluke or not, but something just isn't right here. My two hunches are either a missing/installed KB Update or perhaps a local security policy. I should add that none of the 5 test machines in the equation here have ever been joined to the domain.

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• chomsky hierarchy and programming languages

  - by dader51

  Hi, I'm trying to learn some aspects of the CH ( chomsky hierarchy ) which are related to PL ( programming languages ), and i still have to read the Dragon Book. I've read that most of the PL can be parsed as CFG ( context free grammar ). In term of computational power, it equals the one of a pushdown non deterministic automaton. Am I right ? If it's true, then how could a CFG holds a UG ( unrestricted grammar, which is turing complete ) ? I'm asking because, even if PL are CFG they are actually used to describe TM (turing machines ) and through UG. I think that's because of at least two different levels of computing, the first, which is the parsing of a CFG focuses on the syntax related to the structure ( representation ? ) of the language, while the other focuses on the semantic ( sense, interpretation of the data itself ? ) related to the capabilities of the pl which is turing complete. Again, are these assumptions rights ? thanx a lot.

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• CodePlex Daily Summary for Sunday, July 01, 2012

  CodePlex Daily Summary for Sunday, July 01, 2012Popular ReleasesEnterprise Library 5 Caching with ProtoBuf.NET: Initial Release: This is the initial version, which includes zipped up sourcecode????: ????2.0.3: 1、???????????。 2、????????。 3、????????????。 4、bug??，????。Apworks: Apworks (v2.5.4563.21309, 30JUN2012): Installation Prerequisites: 1. Microsoft .NET Framework 4.0 SP1 2. Microsoft Visual Studio 2010 SP1 3. Other required libraries & assemblies are now included in the installation package so no more prerequisites needed Functional Updates: 1. Refactor the identity field of the IEntity interface from 'Id' to 'ID' 2. Changed the MySql Storage to use the MySql NetConnector version 6.4.4. 3. Implemented the paging support for the repositories. 4. Added the Eager Loading Property specification t...Turing Machine Simulator in C#: TuringMachineSimulator 1.0 Setup: Initial release.RESTester: First version: First beta release that contain following features: - specify http method - specify content type - specify url - specify custom headers - make request - see request result in plain text, XML, JSON, WEB form - save request to DB - load request from DB - delete request from DBScreen Mate: ScreenMate17551.7z: ScreenMate17551.7z - Full Source StarTrek.exe - Just the exe for USSExcelsiorNCC-2000myManga: myManga v1.0.0.6: ChangeLogUpdating from Previous Version: Extract contents of Release - myManga v1.0.0.5.zip to previous version's folder. Replaces: myManga.exe BakaBox.dll CoreMangaClasses.dll Manga.dll Plugins/MangaReader.manga.dll Plugins/MangaFox.manga.dll Plugins/MangaHere.manga.dll Plugins/MangaPanda.manga.dllMagelia WebStore Open-source Ecommerce software: Magelia WebStore 2.0: User Right Licensing ContentType version 2.0.267.1Supporting Guidance and Whitepapers: v1 - Supporting Media: Welcome to the Release Candidate (RC) release of the ALM Rangers Readiness supporting edia As this is a RC release and the quality bar for the final Release has not been achieved, we value your candid feedback and recommend that you do not use or deploy these RC artifacts in a production environment. Quality-Bar Details All critical bugs have been resolved Known Issues / Bugs Practical Ruck training workshop not yet includedDesigning Windows 8 Applications with C# and XAML: Chapters 1 - 7 Release Preview: Source code for all examples from Chapters 1 - 7 for the Release PreviewMicrosoft Ajax Minifier: Microsoft Ajax Minifier 4.57: Fix for issue #18284: evaluating literal expressions in the pattern c1 * (x / c2) where c1/c2 is an integer value (as opposed to c2/c1 being the integer) caused the expression to be destroyed.Visual Studio ALM Quick Reference Guidance: v2 - Visual Studio 2010 (Japanese): Rex Tang (?? ??) http://blogs.msdn.com/b/willy-peter_schaub/archive/2011/12/08/introducing-the-visual-studio-alm-rangers-rex-tang.aspx, Takaho Yamaguchi (?? ??), Masashi Fujiwara (?? ??), localized and reviewed the Quick Reference Guidance for the Japanese communities, based on http://vsarquickguide.codeplex.com/releases/view/52402. The Japanese guidance is available in AllGuides and Everything packages. The AllGuides package contains guidances in PDF file format, while the Everything packag...Visual Studio Team Foundation Server Branching and Merging Guide: v1 - Visual Studio 2010 (Japanese): Rex Tang (?? ??) http://blogs.msdn.com/b/willy-peter_schaub/archive/2011/12/08/introducing-the-visual-studio-alm-rangers-rex-tang.aspx, Takaho Yamaguchi (?? ??), Hirokazu Higashino (?? ??), localized and reviewed the Branching Guidance for the Japanese communities, based on http://vsarbranchingguide.codeplex.com/releases/view/38849. The Japanese guidance is available in AllGuides and Everything packages. The AllGuides package contains guidances in PDF file format, while the Everything packag...SQL Server FineBuild: Version 3.1.0: Top SQL Server FineBuild Version 3.1.0This is the stable version of FineBuild for SQL Server 2012, 2008 R2, 2008 and 2005 Documentation FineBuild Wiki containing details of the FineBuild process Known Issues Limitations with this release FineBuild V3.1.0 Release Contents List of changes included in this release Please DonateFineBuild is free, but please donate what you think FineBuild is worth as everything goes to charity. Tearfund is one of the UK's leading relief and de...EasySL: RapidSL V2: Rewrite RapidSL UI Framework, Using Silverlight 5.0 EF4.1 Code First Ria Service SP2 + Lastest Silverlight Toolkit.SOLID by example: All examples: All solid examplesSiteMap Editor for Microsoft Dynamics CRM 2011: SiteMap Editor (1.1.1726.406): Use of new version of connection controls for a full support of OSDP authentication mechanism for CRM Online.Umbraco CMS: Umbraco CMS 5.2: Development on Umbraco v5 discontinued After much discussion and consultation with leaders from the Umbraco community it was decided that work on the v5 branch would be discontinued with efforts being refocused on the stable and feature rich v4 branch. For full details as to why this decision was made please watch the CodeGarden 12 Keynote. What about all that hard work?!?? We are not binning everything and it does not mean that all work done on 5 is lost! we are taking all of the best and m...CodeGenerate: CodeGenerate Alpha: The Project can auto generate C# code. Include BLL Layer、Domain Layer、IDAL Layer、DAL Layer. Support SqlServer And Oracle This is a alpha program,but which can run and generate code. Generate database table info into MS WordXDA ROM HUB: XDA ROM HUB v0.9: Kernel listing added -- Thanks to iONEx Added scripts installer button. Added "Nandroid On The Go" -- Perform a Nandroid backup without a PC! Added official Android app!New ProjectsAdventureWorks Portal: This project will serve as a demonstration of web-based composite application using HTML 5 (with JSRender), ASP.NET MVC 4, Unity, and Entity Framework.Arkalia Core: Basic vD1.29.1 emulatorBooncraft: This project is a launcher for minecraft that loads and updates the BoonCraft mod pack. See 352n.dyndns.org for more info on BoonCraft.CloudWebSiteDemo: Windows Azure demo codeComputer Mayhem: Computer Mayhem is a growing collection of computer related add-ons for Mayhem.CSharp Extensions: Piccolo insieme di estensioni alla libreria standard di C#D3MediaLib: Diablo 3 Media LibraryEpub Editor: A simple epub editor that allows you to make quick changes to epub source files.IpScanner: The IpScanner windows application should help discovering hosts in a ip based network. The project is written in C#jQuery UI Script# Import Library: This library allows you to develop C# code against the jQueryUI API. This library is a Script# import library with definitions for the jQueryUI v1.8.21 API.Mayhem KeyLogger: The reaction module created allows for a given user to write text to a given file. When enough mappings between Key Press Events and my reaction module, the MayMayhem Keypress Module: The Mayhem Keypress Module was written as a reaction module for the purpose of simulating a keypress. Given an event, a certain key will be pressed in reaction.mIP - A C# Managed TCP/IP Stack for .NET Micro Framework: A fully managed TCP/IP stack for .NET MicroFramework with the primary purpose of enabling web servers. Local Name Resolution for Windows and iOS is automatic!OL 2012 Mayhem: OL 2012 Mayhem is a collection of OL 2012 related add-ons for Mayhem.PHP Code Model: A PHP class library that abstracts PHP language constructs with the goal is to facilitate automated PHP code generationQTalk: QChat, using Gtalk technologyreal date & time for command mode in windows OS: This is a console application to output date and time in specified format in Windows OS both 32 and 64 bits.RESTester: Help to create web requests with all needed customization. Available possibility to save any request to database and in any time recover it.Screen Mate: This project is an open source Visual Studio 2010 C# WinForms screen mate template. As a Star Trek fan (Trekee) my first screen mate will be starships.Sensor Mayhem: Sensor Mayhem is a growing collection of sensor and location related add-ons for Mayhem.SharpTFTP: TFTP server/client lib for .Net/C# (v3.5) implementing RFC1350 The TFTP Protocol (Revision 2), RFC2347 TFTP Option Extension and RFC 2348 TFTP Blocksize Option.Turing Machine Simulator in C#: Turing machine simulator simulates the working of Turing machine. Turing machine is used to study model of computation. Twilio Mayhem: Twilio Mayhem is a growing collection of Twilio related add-ons for Mayhem.Vimeo API for Metro and Windows Runtime: This library helps you to easily access the Vimeo Advanced API from your Metro style applications. It is based on the VimeoDotNet code, and supports Upload API.?????????? ?????: ?????????? ????? ?????????? ? ?????????????? ????????? ??????? ?????????????????? ? ????????? ???????

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• Stack vs queue -based programming language efficiency [closed]

  - by Core Xii

  Suppose there are two programming languages; one where the only form of storage is one (preferred) or two (may be required for Turing-completeness) stacks, and another where the only form of storage is a single queue, with appropriate instructions in each to manipulate their respective storage to achieve Turing-completeness. Which one can more efficiently encode complex algorithms? Such that most given algorithms take less code to implement, less time to compute and less memory to do so. Also, how do they compare to a language with a traditional array (or unbounded tape, if you will) as storage?

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• VirtualBox 3.2 is released! A Red Letter Day?

  - by Fat Bloke

  Big news today! A new release of VirtualBox packed full of innovation and improvements. Over the next few weeks we'll take a closer look at some of these new features in a lot more depth, but today we'll whet your appetite with the headline descriptions. To start with, we should point out that this is the first Oracle-branded version which makes today a real Red-letter day ;-)  Oracle VM VirtualBox 3.2 Version 3.2 moves VirtualBox forward in 3 main areas ( handily, all beginning with "P" ) : performance, power and supported guest operating system platforms.  Let's take a look: Performance New Latest Intel hardware support - Harnessing the latest in chip-level support for virtualization, VirtualBox 3.2 supports new Intel Core i5 and i7 processor and Intel Xeon processor 5600 Series support for Unrestricted Guest Execution bringing faster boot times for everything from Windows to Solaris guests; New Large Page support - Reducing the size and overhead of key system resources, Large Page support delivers increased performance by enabling faster lookups and shorter table creation times. New In-hypervisor Networking - Significant optimization of the networking subsystem has reduced context switching between guests and host, increasing network throughput by up to 25%. New New Storage I/O subsystem - VirtualBox 3.2 offers a completely re-worked virtual disk subsystem which utilizes asynchronous I/O to achieve high-performance whilst maintaining high data integrity; New Remote Video Acceleration - The unique built-in VirtualBox Remote Display Protocol (VRDP), which is primarily used in virtual desktop infrastructure deployments, has been enhanced to deliver video acceleration. This delivers a rich user experience coupled with reduced computational expense, which is vital when servers are running hundreds of virtual machines; Power New Page Fusion - Traditional Page Sharing techniques have suffered from long and expensive cache construction as pages are scrutinized as candidates for de-duplication. Taking a smarter approach, VirtualBox Page Fusion uses intelligence in the guest virtual machine to determine much more rapidly and accurately those pages which can be eliminated thereby increasing the capacity or vm density of the system; New Memory Ballooning- Ballooning provides another method to increase vm density by allowing the memory of one guest to be recouped and made available to others; New Multiple Virtual Monitors - VirtualBox 3.2 now supports multi-headed virtual machines with up to 8 virtual monitors attached to a guest. Each virtual monitor can be a host window, or be mapped to the hosts physical monitors; New Hot-plug CPU's - Modern operating systems such Windows Server 2008 x64 Data Center Edition or the latest Linux server platforms allow CPUs to be dynamically inserted into a system to provide incremental computing power while the system is running. Version 3.2 introduces support for Hot-plug vCPUs, allowing VirtualBox virtual machines to be given more power, with zero-downtime of the guest; New Virtual SAS Controller - VirtualBox 3.2 now offers a virtual SAS controller, enabling it to run the most demanding of high-end guests; New Online Snapshot Merging - Snapshots are powerful but can eat up disk space and need to be pruned from time to time. Historically, machines have needed to be turned off to delete or merge snapshots but with VirtualBox 3.2 this operation can be done whilst the machines are running. This allows sophisticated system management with minimal interruption of operations; New OVF Enhancements - VirtualBox has supported the OVF standard for virtual machine portability for some time. Now with 3.2, VirtualBox specific configuration data is also stored in the standard allowing richer virtual machine definitions without compromising portability; New Guest Automation - The Guest Automation APIs allow host-based logic to drive operations in the guest; Platforms New USB Keyboard and Mouse - Support more guests that require USB input devices; New Oracle Enterprise Linux 5.5 - Support for the latest version of Oracle's flagship Linux platform; New Ubuntu 10.04 ("Lucid Lynx") - Support for both the desktop and server version of the popular Ubuntu Linux distribution; And as a man once said, "just one more thing" ... New Mac OS X (experimental) - On Apple hardware only, support for creating virtual machines run Mac OS X. All in all this is a pretty powerful release packed full of innovation and speedups. So what are you waiting for?  -FB 

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• Why aren't there automated translators from one programming language to another?

  - by serg

  Most programming languages are Turing complete, which means that any task that can be solved in one language can be solved in another one, or even on Turing machine. Then why aren't there automatic translators that can convert programs from any given language to any other language? I've seen couple attempts for two languages, but they always work only on a limited subset of a language and can hardly be used for converting real projects. Is it possible, at least in theory, to write 100% correct translator between all languages? What are the challenges in practice? Are there any existing translators that work?

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• Is there a phrase or word to describe an algorithim or programme is complete in that given any value for its arguments there is a predictable outcome?

  - by Mrk Mnl

  Is there a phrase to describe an algorithim or programme is complete in that given any possible value for its arguments there is a predicatable outcome? i.e. all the ramifications have been considered whatever the context? A simple example would be the below function: function returns string get_item_type(int type_no) { if(type_no < 10) return "hockey stick" else if (type_no < 20) return "bulldozer" else return "unknown" } (excuse the dismal pseudo code) No matter what number is supplied all possibiblites are catered for. My question is: is there a word to fill the blank here: "get_item_type() is ______ complete" ? (The answer is not Turing Complete - that is something quite different - but I annoyingly always think of something as "Turing Complete" when I am thinking of the above).

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• Hyper-V for Developers Part 1 Internal Networks

  Over the last year, weve been working with Microsoft to build training and demo content for the next version of Office Communications Server code-named Microsoft Communications Server 14.  This involved building multi-server demo environments in Hyper-V, getting them running on demo servers which we took to TechEd, PDC, and other training events, and sometimes connecting the demo servers to the show networks at those events.  ITPro stuff that should scare the hell out of a developer! It can get ugly when I occasionally have to venture into ITPro land.  Lets leave it at that. Having gone through this process about 10 to 15 times in the last year, I finally have it down.  This blog series is my attempt to put all that knowledge in one place if anything, so I can find it somewhere when I need it again.  Ill start with the most simple scenario and then build on top of it in future blog posts. If youre an ITPro, please resist the urge to laugh at how trivial this is. Internal Hyper-V Networks Lets start simple.  An internal network is one that intended only for the virtual machines that are going to be on that network it enables them to communicate with each other. Create an Internal Network On your host machine, fire up the Hyper-V Manager and click the Virtual Network Manager in the Actions panel. Select Internal and leave all the other default values. Give the virtual network a name, and leave all the other default values. After the virtual network is created, open the Network and Sharing Center and click Change Adapter Settings to see the list of network connections. The only thing I recommend that you do is to give this connection a friendly label, e.g. Hyper-V Internal.  When you have multiple networks and virtual networks on the host machines, this helps group the networks so you can easily differentiate them from each other.  Otherwise, dont touch it, only bad things can happen. Connect the Virtual Machines to the Internal Network Im assuming that you have more than 1 virtual machine already configured in Hyper-V, for example a Domain Controller, and Exchange Server, and a SharePoint Server. What you need to do is basically plug in the network to the virtual machine.  In order to do this, the machine needs to have a virtual network adapter.  If the VM doesnt have a network adapter, open the VMs Settings and click Add Hardware in the left pane.  Choose the virtual network to which to bind the adapter to. If you already have a virtual network adapter on the VM, simply connect it to the virtual network. Assign IP Addresses to the Virtual Machines on the Internal Network Open the Network and Sharing Center on your VM, there should only be 1 network at this time.  Open the Properties of the connection, select Internet Protocol Version 4 (TCP/IPv4) and hit Properties. In this environment, Im assigning IP addresses as 192.168.0.xxx.  This particular VM has an IP address of 192.168.0.40 with a subnet mask of 255.255.255.0, and a DNS Server of 192.168.0.18.  DNS is running on the Domain Controller VM which has an IP address of 192.168.0.18. Repeat this process on every VM in your environment, obviously assigning a unique IP address to each.  In an environment with a domain controller, you should now be able to ping the machines from each other. What Next? After completing this process, heres what you still cannot do: Access the internet from any of the VMs Remote desktop to a VM from the host Remote desktop to a VM over the network In the next post, well take a look configuring an External network adapter on the virtual machines.  Well then build on top of that so that you can RDP into the VMs from the host machine and over the network.Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• Quel est votre "obscure" langage de programmation préféré ? Unlambda, Fractran, Befung, le plus comp

  Quel est votre "obscure" langage de programmation préféré ? Unlambda, Fractran, Befung, le plus compliqué du monde, un autre ? Unlambda, vous connaissez ? Non ?!? C'est "un langage minimal de programmation fonctionnelle inventé par David Madore qui est fondé sur le principe de la logique combinatoire, une version du lambda-calcul qui omet l'opérateur lambda"... Et Fractran ? Non plus ? Pourtant c'est un langage "ésotérique" et Turing-complet - qui permet donc de "représenter toutes les fonctions calculables au sens de Turing et Church (nonobstant la finitude de la mémoire des ordinateurs)"

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• Is there a phrase or word to describe an algorithim or program is complete in that given any value for its arguments there is a defined outcome?

  - by Mrk Mnl

  Is there a phrase or word to describe an algorithim or programme is complete in that given any value for its arguments there is a defined outcome? i.e. all the ramifications have been considered whatever the context? A simple example would be the below function: function returns string get_item_type(int type_no) { if(type_no < 10) return "hockey stick" else if (type_no < 20) return "bulldozer" else return "unknown" } (excuse the dismal pseudo code) No matter what number is supplied all possibiblites are catered for. My question is: is there a word to fill the blank here: "get_item_type() is ______ complete" ? (The answer is not Turing Complete - that is something quite different - but I annoyingly always think of something as "Turing Complete" when I am thinking of the above).

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• Sync video play over network

  - by Nemesis

  Hi, I have made a media player that plays basically anything that's scheduled to it via a text file. The player can also play the exact same clip on multiple machines(PC's). The problem is the syncing. The same video starts playing on each of the machines, but they are out by about 400ms, which looks crap and if there's sound it's even worse. What I do at the moment is: One machine is set up as the master and all other machines are set up as slaves. The master decides what item will be played. It waits for a message from each of the slaves, once all slaves are connected (or after the timeout), it broadcasts the item id of the file that needs to be played. All machines then start playing that file. What I also tried: I thought that the file loading time might be the major driving factor in the sync mismatch, so I chankged the code to do the following. The master still decides what file to play. It waits for the connect message from each slave (or timeout) and transmits the item id of the file to play. All machines start playing that file but pauses it immediately. The master then again waits for a ready message from each of the slaves. As soon as all slaves responded the master sends a play message to all slaves. All machines then continue the file. This unfortunately did not improve the problem. I am now pretty sure the sync mismatch is due to network delay. How can I compensate for this? Or maybe determine the delay to each slave? All network comms are done with winsock. Any thoughts or ideas is much appreciated.

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• Zenoss Setup for Windows Servers

  - by Jay Fox

  Recently I was saddled with standing up Zenoss for our enterprise.  We're running about 1200 servers, so manually touching each box was not an option.  We use LANDesk for a lot of automated installs and patching - more about that later.The steps below may not necessarily have to be completed in this order - it's just the way I did it.STEP ONE:Setup a standard AD user.  We want to do this so there's minimal security exposure.  Call the account what ever you want "domain/zenoss" for our examples.***********************************************************STEP TWO:Make the following local groups accessible by your zenoss account.Distributed COM UsersPerformance Monitor UsersEvent Log Readers (which doesn't exist on pre-2008 machines)Here's the Powershell script I used to setup access to these local groups:# Created to add Active Directory account to local groups# Must be run from elevated prompt, with permissions on the remote machine(s).# Create txt file should contain the names of the machines that need the account added, one per line.# Script will process machines line by line.foreach($i in (gc c:\tmp\computers.txt)){# Add the user to the first group$objUser=[ADSI]("WinNT://domain/zenoss")$objGroup=[ADSI]("WinNT://$i/Distributed COM Users")$objGroup.PSBase.Invoke("Add",$objUser.PSBase.Path)# Add the user to the second group$objUser=[ADSI]("WinNT://domain/zenoss")$objGroup=[ADSI]("WinNT://$i/Performance Monitor Users")$objGroup.PSBase.Invoke("Add",$objUser.PSBase.Path)# Add the user to the third group - Group doesn't exist on < Server 2008#$objUser=[ADSI]("WinNT://domain/zenoss")#$objGroup=[ADSI]("WinNT://$i/Event Log Readers")#$objGroup.PSBase.Invoke("Add",$objUser.PSBase.Path)}**********************************************************STEP THREE:Setup security on the machines namespace so our domain/zenoss account can access itThe default namespace for zenoss is:  root/cimv2Here's the Powershell script:#Grant account defined below (line 11) access to WMI Namespace#Has to be run as account with permissions on remote machinefunction get-sid{Param ($DSIdentity)$ID = new-object System.Security.Principal.NTAccount($DSIdentity)return $ID.Translate( [System.Security.Principal.SecurityIdentifier] ).toString()}$sid = get-sid "domain\zenoss"$SDDL = "A;;CCWP;;;$sid" $DCOMSDDL = "A;;CCDCRP;;;$sid"$computers = Get-Content "c:\tmp\computers.txt"foreach ($strcomputer in $computers){    $Reg = [WMIClass]"\\$strcomputer\root\default:StdRegProv"    $DCOM = $Reg.GetBinaryValue(2147483650,"software\microsoft\ole","MachineLaunchRestriction").uValue    $security = Get-WmiObject -ComputerName $strcomputer -Namespace root/cimv2 -Class __SystemSecurity    $converter = new-object system.management.ManagementClass Win32_SecurityDescriptorHelper    $binarySD = @($null)    $result = $security.PsBase.InvokeMethod("GetSD",$binarySD)    $outsddl = $converter.BinarySDToSDDL($binarySD[0])    $outDCOMSDDL = $converter.BinarySDToSDDL($DCOM)    $newSDDL = $outsddl.SDDL += "(" + $SDDL + ")"    $newDCOMSDDL = $outDCOMSDDL.SDDL += "(" + $DCOMSDDL + ")"    $WMIbinarySD = $converter.SDDLToBinarySD($newSDDL)    $WMIconvertedPermissions = ,$WMIbinarySD.BinarySD    $DCOMbinarySD = $converter.SDDLToBinarySD($newDCOMSDDL)    $DCOMconvertedPermissions = ,$DCOMbinarySD.BinarySD    $result = $security.PsBase.InvokeMethod("SetSD",$WMIconvertedPermissions)     $result = $Reg.SetBinaryValue(2147483650,"software\microsoft\ole","MachineLaunchRestriction", $DCOMbinarySD.binarySD)}***********************************************************STEP FOUR:Get the SID for our zenoss account.Powershell#Provide AD User get SID$objUser = New-Object System.Security.Principal.NTAccount("domain", "zenoss") $strSID = $objUser.Translate([System.Security.Principal.SecurityIdentifier]) $strSID.Value******************************************************************STEP FIVE:Modify the Service Control Manager to allow access to the zenoss AD account.This command can be run from an elevated command line, or through Powershellsc sdset scmanager "D:(A;;CC;;;AU)(A;;CCLCRPRC;;;IU)(A;;CCLCRPRC;;;SU)(A;;CCLCRPWPRC;;;SY)(A;;KA;;;BA)(A;;CCLCRPRC;;;PUT_YOUR_SID_HERE_FROM STEP_FOUR)S:(AU;FA;KA;;;WD)(AU;OIIOFA;GA;;;WD)"******************************************************************In step two the script plows through a txt file that processes each computer listed on each line.  For the other scripts I ran them on each machine using LANDesk.  You can probably edit those scripts to process a text file as well.That's what got me off the ground monitoring the machines using Zenoss.  Hopefully this is helpful for you.  Watch the line breaks when copy the scripts.

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• I have to shard a mysql database. I want to start with 12 shards on 2 machines. What is the best w

  - by Tim

  All tables are InnoDb. I would rather not use mysqldump, because the shard sizes will be about 200 GB (about 700 million rows), and that will take too long. I was hoping to just stop mysql for an hour, copy the data files to a new machine, and start back up. But you can't do this with InnoDb, as some data is in the shared tablespace. Even if I have the innodb_file_per_table option set. This is not a website, but a custom application, used by tens of thousands right now, so uptime and performance are important. I suppose I could add logic into my server application to allow for gradual rebalancing / moving of a shard. Does anyone have a better idea?

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• Sysprep.exe completely missing on both of my Windows 7 64bit machines. How should I find a workaround?

  - by Zoltán Tamási

  The sysprep.exe file is simply missing on my Windows 7 64bit machine. I tried to find it on another computer, but it wasn't found there either. I can't understand it, because on a lot of forums and even in the official articles there are a lot of references to this tool. I've checked system, system32, sysWOW64 folders, and even made a full search with Total Commander. I only found a sysprep folder in the system32 folder, but inside was only an en-US subfolder, which was empty. Then I thought I will give my Windows PE bootdisk a try, which I've created a while ago. No result, only the same empty en-US folder is present there as well. Please if anyone knows what's happening, point me to the right direction. I need to clone my system and I'm stuck right at the first step...

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• Synced audio ouput on multiple machines? VLC? hardware solutions?

  - by zimmer62

  I'm wondering if there is any software or hardware solutions to synced audio or audio and video across multiple computers or devices on a network. I've seen Sonos, and it might be a good solution, but it's also a very expensive solution. I'd like to be able to play something with realtime audio output on one PC, but hear it on speakers throughout the house, being it the home theater receiver, or another computer in another room. I saw a solution using the apple iport express, but the latency was unacceptable for anything other than just music. I'd like to avoid running audio wires with baluns to a bunch of amplifiers scattered all over the place when I have cat5 run everywhere. Is anyone familiar with using this kind of process for whole home audio? The latency is a big deal for me, if I've got video attached to the sound (e.g. watching a hockey game)

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• Unable to install Windows Installer 4.5 on Windows Server 2008

  - by Tim Trout

  One of the prerequisites for installing SQL Server 2008 Express R2 is Windows Installer 4.5. I have a couple of WS2008 machines I'm prepping, so I downloaded the appropriate version of the file (Windows6.0-KB942288-v2-x86.msu) to our file server and tried isntalling it on both machines. On both machines I get the cryptic 0x80070003 error: "the system cannot find the file specified", but it does not show which file it cannot find. I don't get this when I try to install the Windows XP version on one of my XP machines. Any clues as to what I might be missing or doing wrong? One Technet help forum suggested I try installing the "System Update Readiness Tool", but this installer also fails for the same error code.

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• Why can't I resize some virtual thick disks in VMWhare vSphere Client

  - by Paul-Jan

  Let me start off by mentioning I am really really new to this whole VMWare ESX/vSphere thing, so apologies if this is a FAQ or asked a million times before using better wording. Also, please correct me if I'm using the wrong terms all over the place. We just got this brand new VMWare EXS server, and we started importing virtual machines from around the office. Some of them were originally based on VMWare, others are converted from MS Virtual Server. One of these machines needs a bigger disk, but in the vSphere Client the disk size spinedit is disabled. Disk type is thick. However, for other machines, with the same disk type, the spinedit is enabled and I can happily resize their disks. So here is the question: why can't I resize this disk in particular? All machines are freshly converted, so I assume there are no snapshots yet, which I read would stop a resize from happening (again, correct me if I'm wrong).

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• 2 VB Scripts one to remove Default Gateway and one to add a Default Gateway

  - by Tom

  Hello everyone, I have a client with a bunch of children using about 30 machines on a regular basis. All machines that the children user are set with Static IP Addresses. The machines that the kids use, I would like to be able to run a script that will remove the default gateway so they cant get to the Internet. Then I need another that will add the Default gateway, so Windows and software updates can be run. Both scripts need to use the domain admin account for permissions Any help would be greatly appreciated

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• How to ping virtualbox guest machine by hostname?

  - by Punit Soni

  Here is the summary. VirtualBox 4.2.18 Host OS: Windows 7 Guest OS: Ubuntu 12.04 Networking: Bridged Adaptor I can ping Host and other machines in host's network from ubuntu guest using hostnames. But, I can only ping the guest machine using IP address from host and network machines. I have avahi-daemon running on Guest OS. I want to be able to ping/ssh the guest machine from host and other machines on network using hostname of the guest machine. Please help.

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• How do I add a VMware ESXi Host to Microsoft Virtual Machine Manager?

  - by user63250

  I am trying to manage virtual machines running on a VMware ESXi host using Microsoft System Center Virtual Machine Manager. I was able to add the ESXi machine using the "Add VMware VirtualCenter server" option, but can't access any of the VMs on the datastore associated with this ESXi server. The datastore of the ESXi box is showing up with the correct name, but it won't let me see any of the VMs that have already been created; I get "There are no virtual machines on this host." Because I couldn't get any of the existing virtual machines to show up, I tried creating some new ones. When using VMM to connect to ESXi and create new VMs, I get the following error messages in the "rating explanation" section: The virtualization software on the selected host does not support virtual hard disks on an IDE bus. and The virtualization software on the host XXXXXX does not support the creation of dynamic virtual hard disk. Any ideas on why I can't manage existing machines and why I can't create new ones? The existing machines were created in vSphere. I should note that the ESXi server and the server running SCVMM are both on the same domain. I should also note that although the ESXi box has been added as a VirtualCetner server, when I try to add it through the "Add Host" option, I get an error message saying "Virtual Machine Manager cannot complete the VirtualCenter action on server EXSi because of the following error: The operation is not supported on the object."

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• Windows Live Messenger giving me 8100030d on sign-in

  - by Rob Farley

  I'll bullet point things of note: Other accounts work on the same machine. This is a problem across a few machines. I can sign in no problem on some machines. I can use Web Messenger on the problem machines. I'm using the latest version of Messenger. I've uninstalled, rebooted, reinstalled, rebooted. Deleting the "Windows Live Contacts" folder doesn't help. Deleting the Contacts registry entries doesn't work. I'm not using AVG (and besides, can sign in with other accounts) It successfully connects (and signs me out of eBuddy) before erroring. It creates files in the Windows Live Contacts folder. Windows XP running on the problem machines. I'm not sure what other things it could be... This has also been asked at http://www.experts-exchange.com/Software/Internet_Email/Chat_-_IM/Q_25449997.html, so let's see which system gets me the better response...

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