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• sysctl.conf ignore net settings

  - by Steffen Unland

  I have a little problem with sysctl on a Ubuntu 10.04 LTS system. When I set the sysctl values with "sysctl -w " all work fine, but when I try to use the sysctl.conf file. the net settings will be ignored. For example my sysctl.conf # /etc/sysctl.conf - Configuration file for setting system variables kernel.domainname=findme.sysctl #…

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• What's the difference between isPrototypeOf and intanceof in Javascript?

  - by Steffen Heil

  Hi In some of my own older code, I use the following: Object.prototype.instanceOf = function( iface ) { return iface.prototype.isPrototypeOf( this ); }; Then I do (for example) [].instanceOf( Array ) This works, but it seems the following would do the same: [] instanceof Array Now, surly this is only a very simple example. My…

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• How to modify JSSE / How to do custom build

  - by Steffen Heil

  Hi I have a special requirement for one of my applications where I need the servers nounce (Handshaker.srv_random) when verifying the client certificate. Yet JSSEs X509TrustManager only passes me the certificate, no other information of the handshake. I have located the place, where checkClientTrusted is called (inside…

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• Is writing a reference atomic on 64bit VMs

  - by Steffen Heil

  Hi The java memory model mandates that writing a int is atomic: That is, if you write a value to it (consisting of 4 bytes) in one thread and read it in another, you will get all bytes or none, but never 2 new bytes and 2 old bytes or such. This is not guaranteed for long. Here, writing 0x1122334455667788 to a variable…

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• Fluent NHibernate, dynamically change Table of mapping?

  - by Steffen

  Hello, with fluent nhibernate, is there a way to dynamically switch the table of a mapping at runtime? For example: public class XYClassMap : ClassMap<XY> { public XYClassMap( ) { Table("XYTable"); Id(d => d.Id).GeneratedBy.Identity(); Map(d => d.Value); (...) Given that there are…

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• AlertDialog in if-stetement doesn't show()

  - by Steffen Kern

  I have the following code: public void button_login(View view) { // Instantiate an AlertDialog.Builder with its constructor AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setPositiveButton(R.string.ok, new DialogInterface.OnClickListener() { public void…

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• Mixing NIO with IO

  - by Steffen Heil

  Hi Usually you have a single bound tcp port and several connections on these. At least there are usually more connections as bound ports. My case is different: I want to bind a lot of ports and usually have no (or at least very few) connections. So I want to use NIO to accept the incoming…

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• Java Memory Model: reordering and concurrent locks

  - by Steffen Heil

  Hi The java meomry model mandates that synchronize blocks that synchronize on the same monitor enforce a before-after-realtion on the variables modified within those blocks. Example: // in thread A synchronized( lock ) { x = true; } // in thread B synchronized( lock ) { …

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• MVC: Why put the business logic in the model? What happens when I've multiple types of storage?

  - by Steffen Winkler

  I always thought that the business logic has to be in the controller and that the controller, since it is the 'middle' part, stays static and that the model/view have to be capsuled via interfaces, that way you could change the business logic without affecting anything else,…

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• Why do IOExceptions occur in ReadableByteChannel.read()

  - by Steffen Heil

  Hi The specification of ReadableByteChannel.read() shows -1 as result value for end-of-stream. Moreover it specifies ClosedByInterruptExceptionas possible result if the thread is interrupted. Now I thought that would be all - and it is most of the time. However, now and…

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• Windows Server Backup - Recover only shows the latest backup

  - by Steffen

  We're having quite some trouble at work using Windows Server Backup. We have a HyperV server (Win 2008) running 8 virtual web servers, these are running a variety of OS'es: Win 2003, Win 2008 and a lone Debian. Each virtual server has a separate partition on the…

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• Is there a Windows equivalent of Unix 'CPU steal time'?

  - by Steffen Opel

  In order to assess performance monitoring accuracy on virtualization platforms, the CPU steal time has become an increasingly relevant metric - see EC2 monitoring: the case of stolen CPU for an instructive summary in the context of Amazon EC2 and IBM's paper on…

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• IIS serving static content gives 503 at random

  - by Steffen

  We're having a few issues with our image server. It's a Win 2008 running IIS 7.5 and it only serves static content: images. It has run without issues for quite a while, until recently when we disabled Output Caching, as we noticed having it enabled meant it…

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• OpenVPN performance: how many concurrent clients are possible?

  - by Steffen Müller

  I am evaluating a system for a client where many OpenVPN clients connect to a OpenVPN server. "Many" means 50000 - 1000000. Why do I do that? The clients are distributed embedded systems, each sitting behind the system owners dsl router. The server needs to…

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• How to unsquash and mount arch linux live CD

  - by steffen

  I am following this manual to install Arch Linux from within another Linux distro with the help of an Arch Linux live CD. Here is what I did: sudo mount -o loop Downloads/archlinux-2012.11.01-dual.iso arch_iso/ unsquashfs -d squashfs-root/…

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• Directory directive: AuthType None but still need an AuthProvider?

  - by Steffen Winkler

  For now I just need the server to let me download files from one specific folder (in my case I chose /opt/myFolder for that task) Distribution is Debian 6.0 *edit_start* Apache version is 2.4, according to their official documentation,…

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• List repositories from multiple projects in Trac using mod_python

  - by Steffen Eriksen

  Currently working on a customized webpage that shows the available projects I have in Trac (1.0.1). I am using mod_python to connect the trac interface. I found a standard page for this, but it didn't show listing of repositories. The…

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• IIS 7.5 stops serving requests for no apparent reason

  - by Steffen

  We're running a site on 4 virtual Win 2008 R2 64 bit servers. This is the only site on the IIS, and we use Windows Network Load Balancing to share the load between our 4 virtual servers. We've used these virtual servers for…

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• Connecting two pcs through cable, at the same time as wireless

  - by Steffen

  I've got 2 pcs setup with WLAN - however when I copy files between the machines it takes forever (obviously, since I run 801.11g). So I thought, why not just connect them directly with a cable (my wireless router is the…

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• Using OSX home directories from linux

  - by Steffen

  I'm running an OSX (Snow Leopard) Server with OpenDirectory, which is nothing else than a modified OpenLDAP with some Apple-specific schemas. However, I want to reuse this directory on some of my Linux (Debian Squeeze)…

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• Why is IIS 7.5 flushing file cache very often?

  - by Steffen

  We're running a Win 2008 R2 server with IIS 7.5 for serving image files. It's only used for static content, and file caching has been set up to cache files for 10 minutes. However the IIS frequently completely…

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• Steps To Modify Popular Themes On Windows XP

  Personal computer users are familiar with the various exciting themes available with all versions of Microsoft Windows XP.In fact, almost each and every version of this hugely popular operating syste... [Author:…

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• Find Out Which PC Games Are Vista Compatible

  Do you know that for games, there is no other PC operating system that offers as great a variety as an operating system released by Microsoft? Therefore Windows Vista from Microsoft is no exception. ... [Author:…

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• Fix Your Email Problems In Simple Steps

  E-mail Fix up(http://www.onlinepc24x7.com/product.php?plan_id=p5&price=17&plan=Email%20Fixup&cur=USDℑ=emailfixup.jpg&cs=171d03aa25e2fcc64c4b3c69e42e9f94&) is a convenient way of dealing with…

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• WCF wsHttpBinding "There was no channel that could accept the message with action"

  - by Steffen Schindler

  I have a webservice in IIS. I'm trying to call a function but i get an errormessage like: There was no channel that could accept the message with action…

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