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  • How do you set up DNS in Window Server 2008 in a Hyper-V environment?

    - by Nathan DeWitt
    I have a laptop running Server 2008 and Hyper-V. I have created a virtual machine that is also running Server 2008, that I used dcpromo to create as a domain controller. I disabled IPv6 because I had no idea how to enter a default address, and I just wanted to make a standalone MOSS dev environment. I have tried every combination of creating a virtual network on the host and then connecting to that in the VM, but I can't get the VM to communicate with the host and vice versa. No pinging, no copy and paste, nothing. Thanks. To update: My VM (which is its own DC) currently does not have a static IP. When I set the IP to static, I could not find anything that would let it talk to the host machine.

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  • Can enabling a RAID controller's writeback cache harm overall performance?

    - by Nathan O'Sullivan
    I have an 8 drive RAID 10 setup connected to an Adaptec 5805Z, running Centos 5.5 and deadline scheduler. A basic dd read test shows 400mb/sec, and a basic dd write test shows about the same. When I run the two simultaneously, I see the read speed drop to ~5mb/sec while the write speed stays at more or less the same 400mb/sec. The output of iostat -x as you would expect, shows that very few read transactions are being executed while the disk is bombarded with writes. If i turn the controller's writeback cache off, I dont see a 50:50 split but I do see a marked improvement, somewhere around 100mb/s reads and 300mb/s writes. I've also found if I lower the nr_requests setting on the drive's queue (somewhere around 8 seems optimal) I can end up with 150mb/sec reads and 150mb/sec writes; ie. a reduction in total throughput but certainly more suitable for my workload. Is this a real phenomenon? Or is my synthetic test too simplistic? The reason this could happen seems clear enough, when the scheduler switches from reads to writes, it can run heaps of write requests because they all just land in the controllers cache but must be carried out at some point. I would guess the actual disk writes are occuring when the scheduler starts trying to perform reads again, resulting in very few read requests being executed. This seems a reasonable explanation, but it also seems like a massive drawback to using writeback cache on an system with non-trivial write loads. I've been searching for discussions around this all afternoon and found nothing. What am I missing?

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  • Placement of command line options in bash

    - by Nathan Rambeck
    I just starting using a Mac and have been frustrated that command line options are required immediately following the command so that this works: ls -la /usr but this doesn't: ls /usr -la ls: -la: No such file or directory Is there any way to change this? Or can someone tell me why the placement of options is agnostic on most Linux platforms, but not on Mac?

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  • Run script when POST data is sent to Apache

    - by Nathan Adams
    Among my several years of running servers there seems to be a pattern with most spam activity. My question/idea is that is there a way to tell Apache to run a script when POST data is detected? What I would want to do is perform a reverse DNS lookup on the client's IP address, and then perform a DNS lookup on the hostname in the PTR record. Afterwards, perform some checks, excuse the pseudo-code: if PTR does not exist: deny POST request if IP of PTR hostname = client's IP Allow POST request else deny POST request Though I don't care about GET requests, even though they can be just as malicious, this idea is targeted towards spam comments which use POST data to send the comment data to the web server. In order to make sure there isn't much of a time delay, I would run my own recursive DNS server. Please do note, this isn't meant to be a sliver bullet to spam, but it should decrease the volume. Possible or impossible?

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  • Set default input/output sound

    - by Nathan Koop
    I have a mac that is hooked into a sound board, I have external sound card that interfaces between the computer and the soundboard, this works great. However, whenever the computer restarts it sets the input & output to the 'internal microphone' and the 'built in output'. I'd like to default to the other soundcard. How can I do this? I'm running OS 10.6.3

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  • Mouse Icon Distorted on Secondary Display

    - by Nathan Taylor
    I have a strange issue with a dual monitor, extended desktop setup where the mouse is always fine on the primary monitor, but sometimes when I move to the secondary display the icon becomes garbled and distorted (sometimes it just looks like a vertical line, instead of a pointer). If I move the mouse back and forth rapidly between primary and secondary displays the level of "garbledness" of the icon will change and sometimes go away completely. If I switch the display settings and set it to "Duplicate Monitor 1" then I end up with a garbled icon on the primary display and an accurate one on the secondary. Very annoying. Computer is Windows 7 Ultimate with an HD8750 and the newest video drivers. Monitors are two Dell 24" displays connected via DVI cables. I have also tried VGA cables.

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  • HP Cue-Scanning Flow component freezes

    - by Nathan Fellman
    I am trying to scan with an HP network scanner (actually E6500 all-in-one). Whenever I try to scan, it starts up a flash screen with HP Scanning written all over it, which proceeds to do nothing. Digging in, I found that the process that gets stuck is hpqkygrp.exe, aka "HP CUE-Scanning Flow Component". This happened when I tried scanning from onenote or from the HP Solution Center. However, it seems that scanning from Windows' Fax and Scan utility works fine. As a (probably related) side-note, scanning directly from the scanner (using the buttons on its panel) doesn't work either. How can I keep this process from getting stuck?

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  • Free software for connecting to a Nokia phone to transfer music

    - by Nathan Fellman
    What free software is there for connecting to a Nokia phone? Nokia recently "upgraded" their PC Suite with a music manager that isn't compatible with my phone, and frankly, PC Suite sucks so much that I'd be happy not to use it. Is there any other free software for connecting a PC to a Nokia phone? Specifically, I'm looking for something that I can use to transfer music.

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  • La programmation devrait-elle être connue par tous ? Linus Torvalds émet des réserves

    La programmation devrait-elle être connue par tous ? Linus Torvalds émet des réservesÀ l'ère du numérique, les débats sur la programmation pour tous font de plus en plus surfaces. Mais, la programmation est-elle faite pour tout le monde ?Plusieurs initiatives ont vu le jour pour faire de la programmation une discipline connue par tout le monde. C'est notamment le cas du projet code.org, qui bénéficie du soutien des grands noms du secteur technologique comme Bill Gates ou encore Mark Zuckerberg....

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  • change the subdomain and keep the rest of the url

    - by MohamedKadri
    Hello, I'm working on a multilingual website, and I want to generate the links in this way: The site is domain.tld and defaults to English, It has some subdomains like fr.domain.tld which will be in French, de.domain.tld which will be in German, it.domain.tld which will be in Italian... when the current page is the index, the links to other languages will be like this: domain.tld, fr.domain.tld, de.domain.tld, it.domain.tld.... But when we are in another page like domain.tld/my-page, how do we generate the URLs to match the current page but with another subdomain/language using PHP

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  • Google Analytics se rapproche des Google Apps, des scripts génèrent automatiquement des rapports d'analyse d'audience

    Google Analytics se rapproche des Google Apps Des scripts génèrent automatiquement des rapports d'analyse d'audience avec les outils bureautiques en ligne Dans un billet du blog officiel de Google Analytics, Google vient d'annoncer la sortie d'une nouvelle fonctionnalité dans Google Analytics qui permettra d'intégrer plus facilement les données du service d'analyse d'audience Web dans un script Google Apps, une fonctionnalité qui d'après Google était très demandée par les utilisateurs. Les produits concernés sont Google Docs, Sites et Spreadsheets. On peut voir comme illustré ci-dessus, comment les données de Google Analytics ont été capturées par un script Google Apps et affichées dans ...

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  • [News] Les 60 outils .NET que vous devriez conna?tre

    Le site de blog webdistortion.com publie une liste de 60 outils que tout d?velopper .NET doit conna?tre : "Every good developer knows never to re-invent the wheel, especially if there is software out there that has been tested by others, and has an established track record. As a developer using the .NET framework I?ve found some of these libraries invaluable, so I?m sharing them for some of the other dev?s out there with a brief outline of how to use."

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  • Nouvelle page cours Android avec déjà 10 articles sur le développement mobile avec Android. Faites-n

    Bonjour à tous, Ce sujet est destiné à mieux connaître vos attentes et vos domaines préférés concernant Android. Pour faire bref : Quel tutoriel ou cours Android voudriez vous voir paraître prochainement sur DVP? N'hésitez pas à préciser : Pourquoi ce domaine vous interesse ? Pourquoi auriez vous besoin de ce cours/tutoriel ? Sous quelle forme le voudriez vous ? Cours théorique avec peu d'exemples? Tutoriel pratique avec de nombreux e...

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  • HVM virtualization with PV drivers on XenServer

    - by Nathan
    Is it possible to create an HVM guest in XenServer 5.5 that uses PV drivers for disk and network without being fully paravirutalized? This should give me decent performance from the VM without having to jump through hoops to create a PV guest when a pre-built template doesn't exist. Since PV drivers exist for Windows, and XenServer provides templates for windows that use HVM virtualization this must be possible, I just don't see how to configure this myself.

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  • Thoughts on Apache log file sizes?

    - by Nathan Long
    Do you place any limits on the size of Apache log files - access.log and error.log? Specifically, can you give: Reasons to limit log file sizes Disk space Any other? Reasons NOT to limit log file sizes Research into performance issues or security breaches Any other? Methods of doing so Cron job that periodically deletes the file, or the first N lines? Any other? Anything you might salvage before deleting For example, grep out how many times a file was downloaded before deleting the access logs I'd like get the thoughts of experienced sysadmins before I do anything. (Marking as community wiki since this may be a matter of opinion.)

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  • Pourquoi les PC se vendent mieux qu'avant mais pas les tablettes ?, analyse d'un professionnel IT

    Pourquoi les PC se vendent mieux qu'avant mais pas les tablettes ? analyse d'un professionnel IT Alors que l'on prévoyait un avenir bien sombre pour le marché des pc à contrario du marché des tablettes, avec une chute des ventes du premier et une explosion pour le second, la tendance s'est récemment inversée. Pourquoi ? Telle est la question que se posent les spécialistes du secteur. Cela est la conjonction de plusieurs facteurs, comme le note Peter Yared fondateur et directeur technique de Sapho.Tout...

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  • Les Collections en Objective-C : Manipuler les tableaux, introduction à NSArray et NSMutableArray par Sylvain Gamel

    Retrouvez un nouvel article d'introduction aux tableaux d'objets : NSArray et à NSMutableArray. Citation: Les tableaux d'objets sont une structure de données courante et très souvent utilisées. Qu'est-ce qu'un tableau ? Un tableau est une liste ordonnée d'objets où chaque objet peut être accédé par sa position dans le tableau : son index. Java et Cocoa proposent évidemment des classes pour mettre en oeuvre ces structures de données. Cet article se propose d'introduire rapidement les principales fonctionnalités offe...

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  • Intercept Apache communication

    - by Nathan Adams
    I am looking to develop a solution that eliminates potential spammers. The way this system will work is that it will watch connections and requests. Going into the specifics is more for stackoverflow, But, what I am interested in is if it is possible to tell Apache to pass the request over to my application first and give it the ability to accept/deny the request. Sure, it will make requests slower, but I think that is a trade off I am willing to take. I still want, however, Apache to run the request through any interpreters (such as PHP). The idea is that one wouldn't have to implement anti-spam measures on a per app basis but have an "umbrella" of spam protection.

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  • Is there a work around for the broken IE Tab in Firefox 3.6?

    - by Nathan Fellman
    My Firefox upgraded itself automatically to version 3.6, and I found that IE tab is broken there. Apparently IE tab is known to be broken in this version. Are there any known workarounds such as these? a different plugin with the same functionality a way to tell FF to behave in some legacy or compatibility mode for certain plugins a new version of IE tab In the meanwhile I'm glad that Chrome's current release supports plugins, and IE tab works there.

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  • How can I compress a movie to a specific file size in Windows 7's Live Movie Maker?

    - by Nathan Fellman
    In previous versions of Windows Movie Maker I could take a raw video file and specify the file size to compress it to, and Movie Maker would compress it accordingly (with the appropriate loss in quality). Live Movie Maker, which comes with Windows 7, doesn't seem to have this option. I can only set specify the requested quality. Is there any way to specify the size of the target file for Windows Live Movie Maker?

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  • Windows Server 2008 - inexplicable system time jumps/glitches/inaccuracies

    - by Nathan Ridley
    I'm running a production web server on Windows Server 2008. On this server I have a database which logs certain user actions, but every now and again I inexplicably get database entries which, according to the record ID and the records immediately before and after, have the wrong time logged against them (7 days+ too old). For example, record ID 1001 will be for Dec 7, 11pm, 1002 will be for Dec 7, 11:01pm, then 1003 will be for Nov 28, 1:38am, then the next will be back on track again. The problem seems to occur in random records (or 2-3 records in a row) and crops up once every few days. This is absolutely baffling because there is only one place in the application that assigns this date/time value and it's simply the system UTC date. I have been synchronizing the system time to time-a.nist.gov (which I read in another article was a bit more reliable than the default time.windows.com) and it seems to occasionally get out of time anyway (3-4 minutes), but I'm speculating that occasionally the time server has a temporary glitch where the date changes to a drastically wrong value for a short space of time, then changes back. Either that, or the motherboard clock battery is screwed and the reason the time momentarily changes is that the motherboard loses the time and then the time synchronization puts it back again. Could either of my suspicions be right? Should I turn off time synchronization for a production server? Assigning dates to an event log where the dates are up to 2 weeks prior to the actual date is a severe problem I can't have when the next version of my application is released. Any suggestions or advice would be appreciated.

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  • How do I change until the next underscore in VIm?

    - by Nathan Long
    If I have this text in vim, and my cursor is at the first character: www.foo.com I know that I can do: cw to change up to the first period, because a word (lowercase w) ends at any punctuation OR white space cW to change the whole address, because a Word (uppercase w) ends only at whitespace Now, what if I have this: stupid_method_name and want to change it to this? awesome_method_name Both cw and cW change the whole thing, but I just want to change the fragment before the underscore. My fallback technique is c/_, meaning 'change until you hit the next underscore in a search,' but for me, that also causes all underscores to be highlighted as search terms, which is slightly annoying. Is there a specifier like w or W that doesn't include underscores?

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