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Accessing clearcase view drive from virtual machine is slow

- by PermanentGuest

I have a windows XP virtual machine running under a Windows XP host. On the host : On the host clearcase 7.1.1.2 is installed. I have a dynamic view mapped onto some drive. The view has certain VOB/directory structure where my application DLLs from the nightly build and config files are stored. I run my application on the host machine which uses the DLLs and config files from the VOB and everything runs smooth. Now I want to move this set-up to a virtual machine. On the guest : I'm running the guest with a vm-player. I don't want to install clear-case on this as I don't want to expose this machine onto the network. The network setting in the guest is 'host-only'. I have mapped the host's clearcase view drive as a shared folder and I'm able to access this drive from the virtual machine. Also, the application is running. However, the problem is that the access of the clearcase drive from the virtual machine is very slow. I can experience this from the windows explorer. Due to this, the starting of my application takes several seconds in the virtual machine while on the guest it comes up pretty fast. My question is : Is there any way to speed up the performance? I have managed to copy some of the DLLs which don't change frequently to the virtual machine to improve the performance. However, there are still lot of DLLs which have to be taken from the clearcase drive as they change frequently. VMplayer version is : VM Player 3.0.1 build-227600 Both guest and host is : Windows XP service pack 3 Host clearcase is : clearcase 7.1.1.2

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Can't remote into Virtual PC

- by Spamela

I used to be able to remote into my Virtual PCs. It has been working for at least a year. Yesterday just stopped working... I cannot figure it out... Things I have triple-checked: 1. My Virtual PCs have "Allow Remote Access" checked. 2. My Virtual PCs have an account in the Administrator group that is password protected. 3. My Host's entry in the registry for the Terminal Services Port is still the default of 3389. So here is the strange thing. I can't even remote into the Virtual PC from it's host much less another PC... From the host, I can ping the Virtual PC and get a response but when trying to remote into it from the host I get the following error: Remote Desktop can't connect to the remote computer for one of these reasons: 1)Remote access to the server is not enabled. 2)The remote computer is turned off 3)The remote computer is not available on the network My host is running Windows 7. Virtual PCs are running XP. Thank you for looking at this!

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How to add NT Virtual Machine\Virtual Machines to GPO

- by Nicola Cassolato

I have a Windows 2012 Server with Hyper-V enabled and a few virtual machines. My current configuration has a few account in the "Log on as a service" list in the domain policies, and sometimes this prevent my virtual machines from starting (I get this error: 'Error 0x80070569 ('VM_NAME' failed to start worker process: Logon Failure: The user has not been granted the requested logon type at this computer.') As described in this KB I would like to add NT Virtual Machine\Virtual Machines to my "Log on as a service" list to resolve my problem. My problem is that when I try to add that user to my domain policy I get an error message: "The following account could not be validated". My domain controller obviously doesn't know about that user since it's not an Hyper-V enabled server. How can I add that account to my Domain Policies?

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Apache disabled virtual host domains resolve an enabled virtual host

- by littleK

I have three virtual hosts defined on apache on my Ubuntu server for three different domains. If I disable two of the virtual hosts (a2dissite) and try to resolve those two URL's in the browser, then the one remaining enabled site will resolve. How can I configure apache so that the domains for the disabled virtual hosts do not resolve? This is how all 3 virtual hosts are configured (info is masked): # domain: myfirstdomain.com # public: /home/me/public/myfirstdomain.com/ <VirtualHost *:80> # Admin email, Server Name (domain name), and any aliases ServerAdmin [email protected] ServerName www.myfirstdomain.com ServerAlias myfirstdomain.com # Index file and Document Root (where the public files are located) DirectoryIndex index.html index.php DocumentRoot /home/me/public/myfirstdomain.com/public # Log file locations LogLevel warn ErrorLog /home/me/public/myfirstdomain.com/log/error.log CustomLog /home/me/public/myfirstdomain.com/log/access.log combined </VirtualHost>

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Virtual Hard Disk Migration from Virtual Server 2005 to Hyper-V

- by Akash Kava

I have two questions, Can I use existing 2nd Hard Drive as External Hard Drive inside Virtual Server Instance running on same machine? If I use right now Virtual Server 2005 and run my server, tomorrow if I buy HyperV on different machine, can I just simply use same Virtual Hard Drive in Hyper V Without having to reinstall everything?

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What are the Best Virtual Desktop Managers for Windows 7 excluding Dexpot? [closed]

- by user233641

My question is different to others as my list of important features is completely different and I believe unique. Necessary Features Are: Dual-monitor support 6 desktops minimum Different icons can be created on different desktops Reliable and does not delete or remove icons without input from me Ability to save profiles and reload them if necessary Ability to change the home desktop to a different one Reasonably easy to use Keyboard Support Good email support

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The Template Method Design Pattern using C# .Net

- by nijhawan.saurabh

First of all I'll just put this pattern in context and describe its intent as in the GOF book: Template Method: Define the skeleton of an algorithm in an operation, deferring some steps to Subclasses. Template Method lets subclasses redefine certain steps of an algorithm without changing the Algorithm's Structure. Usage: When you are certain about the High Level steps involved in an Algorithm/Work flow you can use the Template Pattern which allows the Base Class to define the Sequence of the Steps but permits the Sub classes to alter the implementation of any/all steps. Example in the .Net framework: The most common example is the Asp.Net Page Life Cycle. The Page Life Cycle has a few methods which are called in a sequence but we have the liberty to modify the functionality of any of the methods by overriding them. Sample implementation of Template Method Pattern: Let's see the class diagram first: Normal 0 false false false EN-US X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:8.0pt; mso-para-margin-left:0in; line-height:107%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi; mso-font-kerning:1.0pt; mso-ligatures:standard;} And here goes the code:EmailBase.cs 1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Text; 5 using System.Threading.Tasks; 6 7 namespace TemplateMethod 8 { 9 public abstract class EmailBase 10 { 11 12 public bool SendEmail() 13 { 14 if (CheckEmailAddress() == true) // Method1 in the sequence 15 { 16 if (ValidateMessage() == true) // Method2 in the sequence 17 { 18 if (SendMail() == true) // Method3 in the sequence 19 { 20 return true; 21 } 22 else 23 { 24 return false; 25 } 26 27 } 28 else 29 { 30 return false; 31 } 32 33 } 34 else 35 { 36 return false; 37 38 } 39 40 41 } 42 43 protected abstract bool CheckEmailAddress(); 44 protected abstract bool ValidateMessage(); 45 protected abstract bool SendMail(); 46 47 48 } 49 } 50 EmailYahoo.cs 1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Text; 5 using System.Threading.Tasks; 6 7 namespace TemplateMethod 8 { 9 public class EmailYahoo:EmailBase 10 { 11 12 protected override bool CheckEmailAddress() 13 { 14 Console.WriteLine("Checking Email Address : YahooEmail"); 15 return true; 16 } 17 protected override bool ValidateMessage() 18 { 19 Console.WriteLine("Validating Email Message : YahooEmail"); 20 return true; 21 } 22 23 24 protected override bool SendMail() 25 { 26 Console.WriteLine("Semding Email : YahooEmail"); 27 return true; 28 } 29 30 31 } 32 } 33 EmailGoogle.cs 1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Text; 5 using System.Threading.Tasks; 6 7 namespace TemplateMethod 8 { 9 public class EmailGoogle:EmailBase 10 { 11 12 protected override bool CheckEmailAddress() 13 { 14 Console.WriteLine("Checking Email Address : GoogleEmail"); 15 return true; 16 } 17 protected override bool ValidateMessage() 18 { 19 Console.WriteLine("Validating Email Message : GoogleEmail"); 20 return true; 21 } 22 23 24 protected override bool SendMail() 25 { 26 Console.WriteLine("Semding Email : GoogleEmail"); 27 return true; 28 } 29 30 31 } 32 } 33 Program.cs 1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Text; 5 using System.Threading.Tasks; 6 7 namespace TemplateMethod 8 { 9 class Program 10 { 11 static void Main(string[] args) 12 { 13 Console.WriteLine("Please choose an Email Account to send an Email:"); 14 Console.WriteLine("Choose 1 for Google"); 15 Console.WriteLine("Choose 2 for Yahoo"); 16 string choice = Console.ReadLine(); 17 18 if (choice == "1") 19 { 20 EmailBase email = new EmailGoogle(); // Rather than newing it up here, you may use a factory to do so. 21 email.SendEmail(); 22 23 } 24 if (choice == "2") 25 { 26 EmailBase email = new EmailYahoo(); // Rather than newing it up here, you may use a factory to do so. 27 email.SendEmail(); 28 } 29 } 30 } 31 } 32 Final Words: It's very obvious that why the Template Method Pattern is a popular pattern, everything at last revolves around Algorithms and if you are clear with the steps involved it makes real sense to delegate the duty of implementing the step's functionality to the sub classes. Normal 0 false false false EN-US X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:8.0pt; mso-para-margin-left:0in; line-height:107%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi; mso-font-kerning:1.0pt; mso-ligatures:standard;}

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Forms authentication ignored in virtual application

- by Christo Fur

I have an admin site swet up as a virtual applcation inside of another website. I would like visitors to the sub directory (the virtual application) to be promtped for credentials using the same Forms autheentication set up on the main parent site Have tried all sorts of things but can't get it to work including Removing all ,, and sections from the virtual-app web.config Copying the same ,, and sections from the parent to the virtual-app web.config Using a virtual directory instead of virtual application But I never get promted for credentials Anyone know how to get this setup? thanks

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Ajax method within a added method in jQuery validator

- by nikospkrk

Hi, I'm kind of stuck with this pretty simple (I'm sure) jQuery/Javascript issue. Here's the code : jQuery.validator.addMethod("emailExists", function(value, element, param) { var email = value || ''; var valid = 0; $.ajax({ type: "POST", url: param, data: "email=" + email, success: function(msg) { if (msg != '' && msg) { valid = 0; } else { valid = 1; } } }); return valid; }, "* Email address already registered, please login."); This function is called where a user type his email address in a registration form, and everything seems to work perfectly, except that my valid variable returned isn't updated, whereas when I use an alert box it is properly done! It looks like it return the value before the AJAX is done, any idea? Cheers, Nicolas.

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C# String.format extension method

- by Paul Roe

With the addtion of Extension methods to C# we've seen a lot of them crop up in our group. One debate revolves around extension methods like this one: public static class StringExt { /// <summary> /// Shortcut for string.Format. /// </summary> /// <param name="str"></param> /// <param name="args"></param> /// <returns></returns> public static string Format(this string str, params object[] args) { if (str == null) return null; return string.Format(str, args); } } Does this extension method break any programming best practices that you can name? Would you use it anyway, if not why? If I renamed the function to "F" but left the xml comments would that be epic fail or just a wonderful savings of keystrokes?

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Why setter method when getter method enough in PHP OOP

- by phphunger

I am practicing OOP with PHP, and I am struck at setter and getter methods. I can directly access the class properties and methods with getter method then what's the use of setter method? See my example. <?php class MyClass{ public $classVar = "Its a class variable"; public function Getter(){ return $this -> classVar; } } $obj = new MyClass; echo $obj -> Getter(); ?>

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Virtual CloneDrive - Free Utility

- by TATWORTH

At http://www.slysoft.com/en/virtual-clonedrive.html, SlySoft have made available, Virtual Clone Drive."Virtual CloneDrive works and behaves just like a physical CD/DVD drive, however it exists only virtually. Image files generated with CloneDVD or CloneCD can be mounted onto a virtual drive from your hard-disk or from a network drive and used in the same manner as inserting them into a normal CD/DVD drive. Probably the best virtual drive software, Virtual CloneDrive allows you to enjoy the freedom of a virtual drive and is completely free."

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Better solution then simple factory method when concrete implementations have different attributes

- by danip

abstract class Animal { function eat() {..} function sleep() {..} function isSmart() } class Dog extends Animal { public $blnCanBark; function isSmart() { return $this->blnCanBark; } } class Cat extends Animal { public $blnCanJumpHigh; function isSmart() { return $this->blnCanJumpHigh; } } .. and so on up to 10-20 animals. Now I created a factory using simple factory method and try to create instances like this: class AnimalFactory { public static function create($strName) { switch($strName) { case 'Dog': return new Dog(); case 'Cat': return new Cat(); default: break; } } } The problem is I can't set the specific attributes like blnCanBark, blnCanJumpHigh in an efficient way. I can send all of them as extra params to create but this will not scale to more then a few classes. Also I can't break the inheritance because a lot of the basic functionality is the same. Is there a better pattern to solve this?

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Virtual PC: Cannot restore machine from hibernate

- by Paul Lammertsma

I have two virtual machines set up from Virtual PC on Windows 7 Professional: Windows XP Mode and Xubuntu. Last time I used them (last month or so), I had closed them by hibernating. Evidently, I have meanwhile downloaded a Windows Update affecting VPC and now receive the following error in restoring either of them from hibernation: 'Xubuntu' could not be restored because of either host processor type mismatch or lack of hardware-assisted virtualization support in the system. I've been through the virtual machine's settings, and there's nowhere an option to simply reboot it. (Virtualization is not the problem, as I can create a new virtual machine without any problems.) Any ideas?

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Virtual box lost files

- by Paul Lloyd

I have been running Virtual Box on a Macbook Pro for a year or more, with an old version of Windows XP running on the virtual machine. Recently my Mac battery dies completely and I had left VB / Windows running. When I re-started the Mac, VB would not load. I reinstalled a recent download of VB from a DMG file I had stored. Now VB starts but when I try to start the virtual machine I get the following message, Failed to open a session for the virtual machine Windows XP. Failed to load VMMR0.r0 (VERR_SUPLIB_WRITE_NON_SYS_GROUP). Result Code: NS_ERROR_FAILURE (0x80004005) Component: Console Interface: IConsole {1968b7d3-e3bf-4ceb-99e0-cb7c913317bb} I have been backing up the MAC using Time Machine and have backups going back months. I really need to access the windows files as they have my Accounts and other business critical stuff. Any ideas please, or does anyone know where I can get some support for this combination of hardware / software, apologies I am a novice in this area. Thanks in advance.

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norton ghost error in virtual box

- by Nrew

I'm trying out norton ghost on my virtual box guest os windows xp, dual boot with fedora 12. I've boot norton ghost iso. And tried to backup the partition where win xp and fedora is installed but I get this error. I'm backing it up on another virtual disk created through virtual box. What might be the cause of this error, and how to solve it.

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virtual machines

- by André Alçada Padez

well, i hope this doesn't get categorized as a boating question, but it really is related to programming. I have windows XP, and i am going to have to have a VM running: Windows 7 Visual Studio 2008 Sql Server 2008 IIS 7 (8 in a little while) Wamp Photoshop CS5 etc... so i was wondering what should i use to be easier to install and configure, and best performance: Virtual Box or Microsoft's Virtual Machine? Thank you Well i tried Virtual Box, it's always crashing for some reason. I think i'm going to try Virtual PC, just to stick to an all Microsoft Solution.

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increase performance of virtual machines on the 27" imac

- by evan

I'm using a 27" iMac (i7, 8GB RAM) at work and normally run two or three virtual machines at the same time, which hurts the performance of each virtual machine. I've learned on these forums the best way to increase virtual machine performance (aside from RAM) is to have them running on a separate hard drive from the one the OS is on. Of course with the iMac you can only have one hard drive and not even an SAS or solid state drive (well you could probably take it apart and put one in yourself but I wouldn't be permitted to do that). That being said, do you think it would help to run one or more virtual machines from a firewire external drive (or a usb 2.0)? Thanks for your input!

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Unresponsive virtual OS

- by confusedGeek

Hopefully someone has a suggestion on how to resolve this. Configuration Host: Win 2003R2 w/Virtual Server 2005R2 Virtual1: Win 2003R2 w/Sql Server 2005 Virtual2: Win 2003R2 w/WSS 3.0 Situation This past weekend the power went out and took down the servers (no UPS, it's a desktop standing in as dev testing server). Since the servers went down the Virtual2 server after running WSS fairly heavily for an hour to two will become unresponsive via HTTP. If I login via virtual server's remote control I don't get anything beyond a background screen. The CPU counter on the virtual server's master status shows that it isn't doing anything. The only thing I have been able to do is to turn off Virtual2, which loses any state changes. Shutdown commands issue from the virtual server master status are ignored. After restarting Virtual2 the event logs and application logs don't indicate what caused the problem. Anyone have an idea as to how to repair the OS, or maybe what could be the problem? Thanks ahead of time.

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Running a Linux virtual machine on Windows 7

- by hekevintran

I want to do two things: Set up a virtual machine on Windows 7 to run Ubuntu Set up a way for the virtual machine to read the windows disk or windows to have read/write access to the virtual machine's disk. My goal is to have a place where both Ubuntu and Windows can read and write. What software is good for this task? Are their free programs that can run virtual machines? Also if my machine is running Windows 7 64-bit, can I install Ubuntu 32-bit? Or am I forced to use Ubuntu 64-bit? Or does it not matter?

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IIS virtual location path

- by Worp

Sorry in advance, for this seems to be a very noobish question and should be easily fixable, yet I can't work it out: I am setting up windows authentication for a website running on IIS 8.5: The Yii framework of the website takes input like http://localhost/mywebsite/index.php/site/loginand processes it, using the "login" action of the "site" Controller. I flipped on URL Rewrite to have nicer URLs, leaving the URL with /mywebsite/site/login. Now I need to set up windows authentication for this location. Very specifically ONLY for this very exact location. Only the /site/login location of mywebsite needs to have authentication. Every other location needs to have anonymous. Since it is a "virtual location", I don't know how to do it. I can set up win-auth for files, directories, virtual directories, etc. but not for virtual locations that do not map to any file but only to a Controller/Action in Yii. The working counterpart in Apache is but i can't "translate this into IIS". I have read that IIS does have the "~" symbol but I just couldn't make it work yet. Could it be used to achieve authentication on a location basis? I have looked around virtual directories as well, which seem to simply be a kind of "symlink" to actual folders on the harddrive. Can they be used differently to "create a virtual folder in a location that doesn't really exist to manage its properties"? Help is much appreciated.

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Virtual Machine and Virus

- by tellme

I have a requirement for which I have to get online without protection (firewall, anti-virus). At the same time, I don't want to risk getting infected with viruses. If I install a virtual machine (VirtualBox) to test, and it does get infected with viruses, will it also infect my host system? In other words, can I use the virtual machine for testing without being concerned about a virus on the virtual machine infecting my host?

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Trying to communicate between virtual servers on the same host through ipv6

- by Daniele Testa

I am running KVM on a host with 2 virtual servers. Each virtual server has a own bridge interface on the host VPS1 has br1 VPS2 has br2 Each virtual server has a own ipv4 and a ipv6. The virtual servers has no problem communicating with internet or with eachother through ipv4. However, with ipv6, they can only communicate with internet and NOT with eachother. The host can ping the 2 virtual servers without any problems, but they cannot ping eachother. iptables has been set to ACCEPT on all chains, so it is not the problem. VPS1 has ipv6 = 2a01:4f8:xxx:xxx::10 VPS2 has ipv6 = 2a01:4f8:xxx:xxx::5 the host has the following routes set: ip route add 2a01:4f8:xxx:xxx::10 dev br1 ip route add 2a01:4f8:xxx:xxx::5 dev br2 When I do a ping from VPS2 to VPS1, I see the following on the host: tcpdump -i br1 15:32:27.704404 IP6 2a01:4f8:xxx:xxx::10 > ff02::1:ff00:5: ICMP6, neighbor solicitation, who has 2a01:4f8:xxx:xxx::5, length 32 So it seems like the host is seeing the request coming from VPS1 on br1. But for some reason, it does not forward it to br2. Instead it is asking where the destination IP is through ipv6 multicast. Anyone has a clue what is going on? I find this very strange, as it is working fine with ipv4 with the exact same settings and routes.

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Virtual Box for everyday use?

- by Mark

I was just thinking about how nice virtual machines are...and how even "rebooting" is less painful, because at the very least, you don't have to wait for your physical computer to turn off and on with all the mobo shannanigans at the start... so, what if I ran everything in a virtual machine? Then I wouldn't really need a primary OS, I just need something than can run VirtualBox or what have you. So what's the lightest weight OS I could install, that supports a good virtual machine?

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How to decrease size of KVM virtual machine disk image

- by Cerin

How do you decrease or shrink the size of a KVM virtual machine disk? I allocated a virtual disk of 500GB (stored at /var/lib/libvirt/images/vm1.img), and I'm finding that overkill, so now I'd like to free up some of that space for use with other virtual machines. There seems to be a lot answers on how to increase image storage, but not decrease it. I found the virt-resize tool, but it only seems to work with raw disk partitions, not disk images.

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