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  • Can I create a virtual network interface to connect to a real network device?

    - by michelemarcon
    I have a networked windows pc with 2 network interfaces. The first connects to a lan with ip address 10.1.. The second connects to another lan with ip address 10.2.. Maybe it's a dumb question, however is it possible to virtualize the second network interface, so that the pc can connect to the 2 lans? If necessary, I may switch to linux or paravirtualization. CLARIFICATION: I want to send DHCP broadcast packets on the second lan, but not on the first lan. I want to do it with one single physical network interface. At the moment, I'm not using any virtualization software.

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  • What is the value/cost of enabling "spread spectrum clocking" on my hard drives?

    - by Stu Thompson
    I'm building up a biggish NAS box (10x WD RE4 2TB SATA RAID10) and ran into some problems. During the course of my research, debugging, investigations, etc, I discovered a jumper on the physical drives labeled "spread spectrum clocking". After some googling about this on teh internets, it seems to be a feature that some suggest (without reference or explanation) enabling in 'a storage configuration' that makes the drive less sussesptable to EMI. But why? I've got three core questions: Why is this feature not enabled by default? What are the actual benefits? Are there any costs?

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  • The PROMOTE TRANSACTION request failed because there is no local transaction active.

    - by Mark J Miller
    Under what circumstances would I see the above message? I have a single call to SQL Server which is wrapped in a call to TransactionScope. In our development and QA environments MSDTC is turned off and the call succeeds fine. However, in our production environment with MSDTC turned on we are failing with this call. Is there something that would cause this when I am sure we are not looking at a distributed transaction call at all?

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  • How do I create a thread-safe write-once read-many value in Java?

    - by Software Monkey
    This is a problem I encounter frequently in working with more complex systems and which I have never figured out a good way to solve. It usually involves variations on the theme of a shared object whose construction and initialization are necessarily two distinct steps. This is generally because of architectural requirements, similar to applets, so answers that suggest I consolidate construction and initialization are not useful. By way of example, let's say I have a class that is structured to fit into an application framework like so: public class MyClass { private /*ideally-final*/ SomeObject someObject; MyClass() { someObject=null; } public void startup() { someObject=new SomeObject(...arguments from environment which are not available until startup is called...); } public void shutdown() { someObject=null; // this is not necessary, I am just expressing the intended scope of someObject explicitly } } I can't make someObject final since it can't be set until startup() is invoked. But I would really like it to reflect it's write-once semantics and be able to directly access it from multiple threads, preferably avoiding synchronization. The idea being to express and enforce a degree of finalness, I conjecture that I could create a generic container, like so: public class WoRmObject<T> { private T object; WoRmObject() { object=null; } public WoRmObject set(T val) { object=val; return this; } public T get() { return object; } } and then in MyClass, above, do: private final WoRmObject<SomeObject> someObject; MyClass() { someObject=new WoRmObject<SomeObject>(); } public void startup() { someObject.set(SomeObject(...arguments from environment which are not available until startup is called...)); } Which raises some questions for me: Is there a better way, or existing Java object (would have to be available in Java 4)? Is this thread-safe provided that no other thread accesses someObject.get() until after it's set() has been called. The other threads will only invoke methods on MyClass between startup() and shutdown() - the framework guarantees this. Given the completely unsynchronized WoRmObject container, it is ever possible under either JMM to see a value of object which is neither null nor a reference to a SomeObject? In other words, does has the JMM always guaranteed that no thread can observe the memory of an object to be whatever values happened to be on the heap when the object was allocated.

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  • Switch to another CPanel server, restore mailbox, how to stop Outlook POP3 pull mail data again.

    - by Shiro
    Hi, We switch from a linux CPanel server to another CPanel server, all the setting and file is restore back to the new Linux CPanel server. E.g [email protected] , inside the server I got 100mails. It had been downloaded to my Outlook, my outlook also got 100 mails inside. After I switch to new server, the 100 mail in the old server had been transfer to new server. However, when I open my Outlook, it start to download the 100 mails again, that means I got 200 mails in my mailbox and it is duplicated. How can I stop Outlook to download. The time stamp, receiver and sender is exactly the same. We want to keep a backup in the server, because we don't have a physical server to keep the mail. That why we would like to transfer the mailbox to the new server. Anyone have solution to stop Outlook download again?

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  • ESXi 5.1 - Unable to register host

    - by deanvz
    I download and successfully installed ESXi 5.1. I am however unable to get the licence key I received installed. An error occurred when assigning the specified licence key: The system Memory is not satisfied with the 32 GB of Maximum memory limit. Current with 80.00 GB of Memory. Is there now way around this? A quick google revealed that this is a global problem with no real answer or resolution. The only workaround is to remove the physical RAM chips, but as this is in going to be in production I dont want to do that as it would mean down time when I have to reinsert the memory

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  • Linux Mint on VirtualBox has no internet connection

    - by Martin
    Physical machine: Mac Mini running OSX 10.7.5 Virtual machine: Linux Mint 15 Cinnamon 64-bit Using VirtualBox. I am trying to make the linux connect to the internet. For some reason I can access the host computer with 192.168.2.100. Its set up to show me a web-page that says "It works". This I can see from the linux. But I cannot reach anything on the internet. Either FireFox says "Unable to connect" or when I run nslookup google.com I get connection timed out; no servers could be reached. My setting on VirtualBox under the Network tab are: Bridge Adapter vnic0 promiscouos Mode:Allow All`. If it makes a difference, the host has a WiFi connection to the home router. What have I missed?

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  • vb.net creating and using namespace

    - by tridat
    I've googled for creation of namespaces and found some very useful examples, what these examples didn't have is how do I compile and implement my created namespace on my system so I can include it from my various applications. So for example, if I create a namespace to load a config file from my application path and insert it to an array, Do i need to include the namespace on any project I use or is there a way to make it part of my environment?

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  • Luntbuild + svn - set tagging directory using variables

    - by David Belanger
    Hi, I'm using Luntbuild with Subversion and would like to have our svn tagging environment specific (dev, testing, etc.) and I'm wondering if there's a way to use a variable in the VCS Adapters section. I'm looking for something like this: Directory for tags: tags/Builds/${env}/Service Where ${env} is a variable I can set in the Luntbuild builders section or elsewhere. Does anyone know if what I'm wanting is possible? Thanks.

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  • What is the largest flatscreen monitor available for PC use?

    - by Avery Payne
    I'll qualify this specifically (by order of preference): must have the highest diagonal measurement, widescreen or "normal" aspect ratio doesn't matter here, just the diagonal. must have the highest resolution available, which means 72 inches of 1280x1024 won't cut it. must not have a TV tuner built into it, I'm not looking for a TV set, this is a monitor! must be available at a retail outlet that caters to the general public, i.e. Best Buy, Sears, Costco (all of these examples are in the U.S., although you can suggest something from whatever chain is in your area/nation/geography). Non-retail or non-physical venues like eBay, or businesses that only cater to other businesses, do not qualify under this requirement. I should be able to walk into this place and purchase it, not just whip up an order online. If you are unsure about this requirement, just ask yourself: can I physically see it before I open my wallet and purchase it?

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  • Javascript error in rails app (locally run)

    - by tesmar
    Hi, I am trying to move a development environment from production to my local machine (Ubuntu), and when I get the code up and running on my box, the site works in rails but I get this JS error: Permission denied for http://ad.doubleclick.net to call method Location.toString on http://localhost:3000. Line 0 Do you have any idea how to fix JS problems, or should I disable the ads in development?

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  • Using HSQLDB in production environments

    - by lewap
    I want to use HSQLDB in a production environment for stroring some data in memory and for data export using files. Does anybody have experience with using hsqldb in production environments? Is hsqldb treating server resources gracefully and does it cleanup unused resources properly?

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  • Slowness on Exchange 2007 Server (network related we think)

    - by Az
    We are seeing some odd behavior out of our exchange 2007 server. I believe it is network related as during the slowness in response from the exchange server. During these times downloading files to server is fraught with connection resets and extreme slow download speeds that are not affecting other servers right on the same subnet with the same gateway and ISP. We have about 50 users at a time using Outlook 2003 from a terminal server not displaying any other signs of slowness, all network slowness is confirmed trying downloads on the exchange server itself. Checked for virus issues, there are none. Checked for hardware issues, none found I am noticing between 200-400 TCPv4 connections established I am seeing around 100k tcpv4(active) connections according to perfmon are these numbers odd? Has anyone run into anything similar? Our server has a gigbabit NIC linked to a gigabit switch using cat6 so I do not believe it is "physical". Thanks!

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  • Connecting guest OS to host os internet connection hyper-v

    - by autrevo
    Hyper-V internal switch and VM OS interfacing with Guest OS and IP Cofiguration When configuring hyper-v internal switch, Apart from physical lan adapter (say adapter 1), I see another LAN adapter (say adapter 2) added in host os. And we already have one virtual lan adapter in guest os, (say adapter 3) . adapter 1 is connected to internet with defaulty gateway say, 192.168.0.254 and uses class C IP. By con configuring adapter 2 and 3, I need to acheive two purpose - Access internet in guest os. seemlessly share files & folders between guest and host OS. Please, suggest, What is the best way to configure IP of these three adapters ?

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  • How to use cscope in Visual Studio?

    - by rahulthewall
    Hello all, I am working with Visual Studio (2008 edition) for the first time. Used to programming in a Unix environment, I have become quite used to cscope and vim. For my current project, I really need cscope. I was wondering if there is any way I could use cscope on Visual Studio - or use cscope in Windows. Or if there is another tool which does this job .. Thanks Rahul

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  • On what platform did these popular programming languages originate?

    - by speciousfool
    Perhaps you know the story of HTTP and HTML being developed on a NeXT computer. I am curious which platform served as the first home for these programming languages: Ada C C++ C# D Erlang Fortran Haskell Java Javascript Lisp Logo MATLAB ML Perl PHP Prolog Python R Ruby Scheme SQL Smalltalk I thought it might be interesting to reflect on how the machine and operating environment lead to different design decisions. Or to see if some architecture or operating system variant was particularly fruitful for programming language development. A question for the historians among us.

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  • how do I delete my alternate drive icon on the ubuntu desktop?

    - by broiyan
    I'm on a system with a Windows drive and an Ubuntu drive (both physical, not virtual). Under the Ubuntu Places menu, there is a "320 GB file system" which is the Windows disk. The same drive also appears as an icon on the desktop (but unlike everything else on the desktop, it does not appear in the directory listing of ~/Desktop). I think the icon was put on the desktop by accident and I never use it because the Places menu suffices. How can I delete this icon? Selecting then deleting does not work.

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