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  • Domain with www pointing yo another site

    - by ntechi
    Recently I started Multi Sites on my VPS which is having Centos 64 bit. Currently I am having two sites live and each is working fine, Now the problem is in the URL I have the following sites: http://mbas.co.in http://u-k.in mbas was the very first site on my VPS Now in URL if I type http://mbas.co.in or http://www.mbas.co.in both redirect to my mbas website But for the second website, If in URL I type http://u-k.in then it redirects to the u-k website correctly but if I type http://www.u-k.in then it redirects me to mbas website. You can try that I have configured my DNS in this way, see the image http://i55.tinypic.com/14vlpxl.jpg And my Multi Site code is this <VirtualHost *:80> ServerAdmin [email protected] DocumentRoot /var/www/html/www.mbas.co.in ServerName mbas.co.in ErrorLog logs/mbas.co.in-error_log CustomLog logs/mbas.co.in-access_log common </VirtualHost> <VirtualHost *:80> ServerAdmin [email protected] DocumentRoot /var/www/html/u-k.in ServerName u-k.in ErrorLog logs/u-k-error_log CustomLog logs/u-k-access_log common </VirtualHost>

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  • Virutal Machine loses network connectivity on Hyper V Cluster

    - by Chris W
    We're running a number of VMs on a 6 node failover cluster of blades using Hyper V. We have an intermittent issue (every few days at different times - not a fixed frequency) of VMs losing network connectivity. Console access to the VM suggests all is fine and the underlying blade has normal connectivity. To resolve the problem we either have to re-start the VM or, more usually, we do a live migration to another blade which fires up connectivity and we then migrate it back to the original blade. I've had 3 instances of this happen with a specific VM running on a particular blade however it has happened once with a different VM running on a different blade. All VMs and blades have the same basic setup and are running Windows 2008 R2. Any ideas where I should be looking to diagnose the possible causes of this problem as the event logs provide no help? Edit: I've checked that each blade is running the latest NIC drivers and all seem to be fine. Something that is confusing me - a failover or restart of the VM resolves the issue. Whilst I need to work out the underlying issue that is causing the NICs to hang I'm also concerned that the VM didn't failover to another node which would have solved the outage for me. Is there a way to configure the cluster so that it can tell that the VM guest has lost connectivity and fail it over? As things stand the cluster is assuming that the VM is running happily as I presume Hyper V says everything is great even though there is a problem.

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  • Java Plugin a huge security risk? How to preseve Java plugin from privilege escalation?

    - by Johannes Weiß
    Installing a regular Java plugin is IMHO a real security risk for non-IT people. Normally Java applets run in a sandbox and the applet cannot do anything harmful to your computer. If an applet, however, needs to do something like read-only accessing your filesystem e.g. uploading an image, you have to give it more privileges. Usually that's ok but I think not everyone knows that you give the applet the same privileges to your computer as your user has! And that's everything Java asks you: That looks as 'harmful' as a self-signed SSL certificate on a random page where no sensitive data is exchanged. The user will click on Run! You can try that at home using JyConsole, that's Jython (Python on Java)! Simply type in python code, e.g. import os os.system('cat /etc/passwd') or worse DON'T TYPE IN THAT CODE ON YOUR COMPUTER!!! import os os.system('rm -rf ~') ... Does anyone know how you can disable the possibily of privilege escalation? And by the way, does anyone know why SUN displays only a dialog as harmless as the one shown above (the self-signed-SSL-certificate-dialog from Firefox 3 and above is much clearer here!)? Live sample from my computer:

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  • HLS video segmenting complications. How to create a transport stream with ffmpeg

    - by Agzam
    I have h264 videos, and currently we're using Apple's HTTP Video Streaming tools and mediafilesegmenter to segment these files. What I need to do is to switch to alternative segmenter based on this very popular open-sourced segmenter The problem is that this segmenter does not just take any video, but takes only MPEG-TS videos. So I have to convert my h264 videos to TS first. I can do that with ffmpeg. I'm using this: ffmpeg -i encoded.mp4 -vcodec h264 -i encoded.mp4 -sameq -acodec aac -strict experimental -f mpegts output.ts But this creates fairly larger output. And the reason is that Apple's segmenter keeps the same codec - AVC and the same audio codec - AAC, whereas ffmpeg changes video format to MPEG Video. The question is: can I somehow keep the same AVC video codec and still convert video to a transport stream? So my goal is to keep the same video quality and same video codecs as Apple's medifilesegmenter does. UPD: Okay... it seems that ffmpeg CAN split videos into segments: ffmpeg -i encoded.mp4 -c copy -map 0 -vbsf h264_mp4toannexb -f segment -segment_time 10 -segment_list test.m3u8 -segment_format mpegts segment%d.ts That's still has one problem: it doesn't create http live streaming index file. (-segment_list creates a file with list of segments, but it doesn't look like HLS index). So, you still have to create index file

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  • Two hosting providers running simultaneously... possible / not possible? good practice / unnecessary?

    - by user29600
    For the sake of their reputation, I won't mention the names. But I'll just use: Business I worked for previously - ABC Web Dev Hosting company they used - XYZ Hosting I recently found out that XYZ Hosting had some sort of incident where they ended up losing a lot of their client's data - including ABC Web Dev's. ABC Web Dev was able to recover some of their customer's websites, after pulling them from their local development computers and putting them up on another hosting provider. They ended up losing a lot of clients because of it and their reputation ruined. I'm starting my own web dev company and I don't want to run into this same issue. I'm planning on using Rackspace but, although they are a great company, according to wikipedia they still have had downtime in their past. I thought it might be a good idea to try to run two providers at once, to ensure that if anything happened in one the websites would still be live because of the other. I know the websites would have to be pulling from one server at all times, but if there's a way to redirect requests to the second server if the first one is down that would solve my issue. As a note, we will have a staging environment setup locally which will allow for quick recovery if a provider did have any issues, however I'd like to avoid any downtime at all if possible. So my questions are: Has anyone tried running two providers simultaneously? Would this be considered good practice or am I going too far? Is there really any way to run two simultaneously where one server acts as a backup?

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  • Cisco SG 300-28P PoE switch appears to have damaged my domain server's network IF

    - by cdonner
    I just replaced the old HP ProCurve switch with a new Cisco SG 300-28P managed switch. It has PoE on all ports. Everything works, except for my domain server that went offline and the network interface appears to be dead. Windows says the network cable is disconnected, and no lights blink on the switch. Tried different cables and different ports on the switch. The Cisco PoE ports are supposed to be auto-sensing, i.e. not to send power to a device that cannot handle it. Is this technique not 100% reliable? The server is a SHUTTLE XS35V2 with an onboard network chip, so it is probably fried. My questions: is this plausible? who's fault is it - Shuttle or Cisco (i.e. which support line should I try first)? UPDATE: I did go back and tried another switch between the server and the Cisco switch, and indeed, the connection came back to live. When everything is powered down and I start fresh, with the server connected to the Cisco switch, the port light will blink for a while and the connection status is "No Internet connection" at first until it goes off after about 20 seconds and the connection status changes to "Network cable disconnected". On the other switch it works. Clearly not a PoE issue now. I will start looking into the Cisco's onboard diagnostic functions, but so far I have not noticed anything unusual in the log.

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  • Play audio over network with Windows 7?

    - by Josh
    I have a unique situation where I'd like to stream audio (ALL audio, not just mp3s, etc) from my laptop to another computer over the network. I live in a studio apartment and my laptop is my main computer but I'd like it's audio to play on my htpc with a nice stereo system. Since it's a studio, both computers are in the same room so I don't want 2 sets of speakers. I want my computer to directly play back through the stereo. I used to do this with pulseaudio but my job now requires that I run Windows full time. I'm aware of Shoutcast and other similar streaming solutions but I don't want any transcoding done. It's a waste of CPU and not to mention my laptop fans, and I don't mind the network bandwidth that uncompressed audio requires. Is there a way to run Shoutcast without encoding? Also, I know that Windows Remote Desktop can play audio over the network pretty easily. Is this part of .Net that I could just code a simple app that streams the audio without RD'ing in? I also don't want to run it over a physical wire. :)

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  • Why does nmap ping scan over a VPN link return all hosts alive?

    - by ewwhite
    I'm curious as to why running an nmap -sP (ping scan) on a remote subnet linked via a Cisco site-to-site IPSec tunnel returns "host up" status for every IP in the range. [root@xt ~]# nmap -sP 192.168.108.* Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2012-11-22 14:08 CST Host 192.168.108.0 appears to be up. Host 192.168.108.1 appears to be up. Host 192.168.108.2 appears to be up. Host 192.168.108.3 appears to be up. Host 192.168.108.4 appears to be up. Host 192.168.108.5 appears to be up. . . . Host 192.168.108.252 appears to be up. Host 192.168.108.253 appears to be up. Host 192.168.108.254 appears to be up. Host 192.168.108.255 appears to be up. Nmap finished: 256 IP addresses (256 hosts up) scanned in 14.830 seconds However, a ping of a known-down IP simply times out or doesn't return anything... [root@xt ~]# ping 192.168.108.201 PING 192.168.108.201 (192.168.108.201) 56(84) bytes of data. --- 192.168.108.201 ping statistics --- 144 packets transmitted, 0 received, 100% packet loss, time 143001ms Is there a more effective way to scan live devices connected in this manner?

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  • client flips between internal and external IP addresses??

    - by jmiller-miramontes
    I have what seems like a not-particularly-complicated home network, all things considered: a DSL line comes in to a modem/router, which goes off to a switch, which supports a bunch of machines. My machines live in a 192.168.0.x address space; however, I'm running some public servers on the network, so I have a block of 8 (5, really) static IP addresses that are mapped to the servers by the router. The non-servers get 192.168.0.x addresses via NAT; some machines have static addresses and some get addresses from DHCP. Locally, I'm running a DNS server (named) to map between the domain names and the 192.168 address space. Somewhat messy, but everything basically works. Except: One of my local non-server clients occasionally switches from its internal address to its external address. That is, if I check the logs of a website I'm running internally, the hits coming from this client sometimes show up with the internal 192.168 address, and sometimes with the external (216.103...) address. It will flip back and forth for no apparent reason, without my doing anything. This can be a problem in terms of how the clients interact with the way I have some of the clients' SSH systems configured (e.g., allowing access from the internal network but not the external network), but it also Just Seems Wrong. I will confess that I'm kinda skating on the very edge of my networking competence here, but I can't for the life of me figure out what's going on. If it helps, the client in question is running Mac OS X / 10.6; its address is statically assigned, is not one of the five externally-accessible addresses, and gets its DNS from (first) the internal DNS server and (second) my ISP's DNS servers. I can't swear that none of the other NAT clients are also showing this problem; the one I'm dealing with is my everyday machine, so this is where I run into it. Does anybody out there have any advice? This is driving me crazy...

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  • How could Google Latitude find my exact PC location with no GPS or public wifi?

    - by Mike
    I found a similar question here but I still don't get it. You see, I live in a small town and every time I check my IP location via online services or speed test websites, my location appears to be my ISP server location (which in my case is 250 miles away). But when I tried Google latitude, it pinpointed my exact location within less than 100 meters! I use Windows Vista, Google Chrome, and when I got the message that "Google is trying to locate you", I agreed just to check what the result will be. It was scary, very scary! What I've come up after reading the above link is that Google have a kind of extensive WiFi database locations. That could be understandable with the case of public and open WiFis that are used with a lot of people. Some of them might be using applications that could gather location data and somehow this information ends up in giant Google databases. From those, Google could pinpoint a WiFi location based on its MAC address along with these bits of info that have been gathered via various sources. The issue here is that my WiFi is private, I don't even broadcast my WiFi name. So how on earth did Google find my exact PC location? Please break down the answer in layman's terms as possible.

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  • Increasing SQL Server / Sage performance with SSD? (Dell PE T410)

    - by Anthony
    I have a client wanting better performance of their Sage (Accpac & CRM) server (v5.5, soon to be v7). It's running on 1 of 2 Hyper-V VMs (Svr2008) on a Dell PE T410 server with 24GB of RAM (1333MHz) & dual quad-core, and both VMs (only their C: drives) are on a single RAID5 array. All clients connect via 1Gb ethernet. The 2nd VM is SBS2008 with 9GB RAM (& all SBS dbs & company data are on a separate RAID5 array), & 3GB RAM for the Svr2008 hypervisor. I've given the Sage/SQL Server VM all the RAM I can (12GB) & SQL Server RAM caching (~8GB, never exceeds ~7.5GB, eg. entire db can now be cached in RAM) and that's helped significantly. Upgrading the Hypervisor to Svr2012 is an obvious step, but probably not a dramatic improvement? What about an SSD for this Sage/SQL Server VM (VM = 100GB, <10GB for the actual live DB) ? Can SSDs be put into the SAS hot-swap bays? Or will I have to use the mobo SATA(3Gbps?) ports, or PCI-E SSD card? Should SSDs be RAIDed for this situation? Or is SSD's higher reliability offsetting the need for RAID1/5/10? (I have nightly full disk backups) New territory for me, would appreciate some feedback. Thanks, Anthony.

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  • Htpc aka "Media Center": cheap and *silent*?

    - by Unknown
    It may be me, or the place I live (Italy), but it seems pretty hard to get a build or a prebuilt nettop or a laptop that fits the need. I need something silent able to playback all h.264 fullhd content without stuttering, and well (and not loosing the hw acceleration because of softsubs...) silent not ugly silent and (possibly) cheap. I'm going the linux route, therefore i'm moving towards a cpu-based or nvida-integrated solution (i don't think ati hw accelerated playback - or the intel "hd" acceleration - is useable yet). Ion nettop; it's either the Acer Revo (but here it's incredibly pricey and it's hard to find the dualcore version) or the Asrock Ion 330, that in the current version is rated "silent" at 26Db. 26. Sounds pretty noisy to me!!! the previous version was even worse. was this product really aimed at htpc market?? the Dell Zino - i think it's ATI based unfortunately. Laptop: correct me if I'm wrong: sub 600€/$ units are quite loud under full load (because of the tiny fans). ULW laptops are indeed quite similar: tiniest fans = high pitched noise and the cpu still lacks power for non hd-accelerated video decoding Handmade build: little money can be saved with underpowered cpus, a low-midrange cpu would help in the case of non-hw-accelerated content the cases are quite pricey the PSU one has to get ranges between 100/150 €/$ minimum to keep the noise down a low-mid build, all included, sums up to over 650 €/$ for a still-looking-ugly-unit, without the blu-ray drive. Please help. What do you advise on this? ;) Am I ignoring laptops too much, maybe? Are low-priced Acers that noisy/high pitched under full load?

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  • Windows 7 Apache Crashes on ANY request

    - by Dan
    I have XAMPP installed. I am running Windows 7. I have WordPress installed so that I may tweak it and test things locally before putting them 'live' on a remote server. I just installed BuddyPress. The installation was rather seamless. I activated the plugin and almost immediately, Apache crashed. I have Apache running as a service so it immediately restarted itself and was running BUT if I even so much as refresh the page (or create any other request), down it goes. Listed here is the error report as generated by Windows 7: Problem signature: Problem Event Name: APPCRASH Application Name: apache.exe Application Version: 2.2.4.0 Application Timestamp: 45ebef86 Fault Module Name: ZendOptimizer.dll Fault Module Version: 0.0.0.0 Fault Module Timestamp: 45ea8fee Exception Code: c0000005 Exception Offset: 0004dc22 OS Version: 6.1.7600.2.0.0.256.1 Locale ID: 1033 Additional Information 1: 1ec0 Additional Information 2: 1ec0fd70d07d060e5bfcf53c69ad1739 Additional Information 3: 2c48 Additional Information 4: 2c48940de5e7d1cb2e131ad6a0ca2feb Read our privacy statement online: http://go.microsoft.com/fwlink/?linkid=104288&clcid=0x0409 If the online privacy statement is not available, please read our privacy statement offline: C:\Windows\system32\en-US\erofflps.txt Help?

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  • EEE PC Keyboard malfunctioning - Ctrl key "sticks" after 10 seconds

    - by DWilliams
    I was given a EEE PC belonging to a friend of a friend to fix. The keyboard did not appear to work at all. I spent a while testing out various things, blowing the keyboard out, checking for damage, and so on. Nothing appeared to be physically wrong. At first I noticed that the keyboard appeared to work just fine for 10 seconds (on average, sometimes more sometimes less) after being powered on. It had been restored to the factory default xandros installation with no user set up, so I couldn't get in to mess with things since I couldn't type to make a user. I made an ubuntu live USB to boot it from, and managed to get the boot order changed to boot from USB in the ~10 seconds of working keyboard I had (I don't think I've ever had to rush around BIOS menus that quickly). After I got Ubuntu up on it, I played around a bit more and determined that apparently the ctrl key is stuck down (not literally, but it's on all the time). If I open gedit, pressing the "o" key brings the open dialog, "s" opens the save dialog, and all other behaviour you would expect to see if you were holding down the control key. The only exception that I noticed is the "9" and "0" keys. They function normally. Figuring that out I made a xandros user with a name/password consisting of 9's and 0's. I couldn't find any options in Xandros that could potentially be helpful. I'm not familiar with EEE PCs. Is it safe to assume that the keyboard is simply dead or could there be another problem? I don't want to purchase another keyboard for him if that isn't going to fix the problem. The netbook doesn't show any obvious signs of damage but the owner is a biker and very often has it with him on the road so it's been subjected to a good bit of vibration.

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  • Install Ubuntu 10.10 from loopback mounted ISO image

    - by Zifre
    I have a laptop with a faulty BIOS that has stopped booting from CDs even though it supports it (and it doesn't support booting from USB drives). I am trying to install Ubuntu 10.10 on it. I already had 9.10 installed. I tried using Kexec, but it refused to accept the kernel image. Eventually I found this page which shows how to make GRUB 2 boot from an ISO file. That worked fine, and I am now running the live image from the file. (If I can get this to work, it will be my new preferred way of installing Ubuntu, as it saves CDs and boots much faster.) However, I can't install it. The installer won't make changes to the hard drive, because the partition containing the ISO is mounted (and can't be unmounted because it is in use). Even if I only choose to use other partitions that are not mounted, the installer refuses to go any farther. Clearly, it should be possible using other partitions on the same disk. Is there any way to work around this issue or force the installer to go ahead?

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  • Increasing MSSQL/Sage performance with SSD? (Dell PE T410)

    - by Anthony
    I have a client wanting better performance of their Sage (Accpac & CRM) server (v5.5, soon to be v7). It's running on 1 of 2 Hyper-V VMs (Svr2008) on a Dell PE T410 server with 24GB of RAM (1333MHz) & dual quad-core, and both VMs (only their C: drives) are on a single RAID5 array. All clients connect via 1Gb ethernet. The 2nd VM is SBS2008 with 9GB RAM (& all SBS dbs & company data are on a separate RAID5 array), & 3GB RAM for the Svr2008 hypervisor. I've given the Sage/MSSQL VM all the RAM I can (12GB) & SQL RAM caching (~8GB, never exceeds ~7.5GB, eg. entire db can now be cached in RAM) and that's helped significantly. Upgrading the Hypervisor to Svr2012 is an obvious step, but probably not a dramatic improvement? What about an SSD for this Sage/SQL VM (VM = 100GB, <10GB for the actual live DB) ? Can SSDs be put into the SAS hot-swap bays? Or will I have to use the mobo SATA(3Gbps?) ports, or PCI-E SSD card? Should SSDs be RAIDed for this situation? Or is SSD's higher reliability offsetting the need for RAID1/5/10? (I have nightly full disk backups) New territory for me, would appreciate some feedback. Thanks, Anthony.

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  • Using bind (named) as a public proxy server

    - by TrentDavis
    We have a Python DNS server that does a bunch of stuff to figure out values it should return for various DNS records. This works nicely, however as it is Python, the performance under high load won't be great. What I would like to do is have a "proxy" bind server sit in front of it to return results to the public internet. This will cache the results (typically 15 minutes, some records are a few seconds), so the load on the Python server will be greatly reduced as it will only see one look up per domain (only about 100 domains) every 15 minutes. The data in these domains changes a lot, so using a master won't work as it will constantly be changing. I have something setup that looked like it would work great (using a forwarder for the zone), and tested it with dig etc, all going great. However when we went to go live with it, things weren't working, and we figured out that named is not setting the "Authoritative" bit (fair enough, it is a forwarder). So my question is, can we tell bind to set the Authoritative bit for forwarded domains? I have looked at all the doco I can find, and can't find anything about doing things this way. Most of the doco about using it as a proxy if for a LAN to the internet. Ideally I would like to use bind as it is there and installed (CentOS 5 servers). But at a pinch we could look at a different name server to do the work if it just can't be done with bind. Thanks.

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  • Apache2 MPM-prefork MPM-worker multiple instances on same Ubuntu host machine possible?

    - by user60985
    I have a live Apache2/MPM-Worker instance running Django. I want to also run an Apache2/MPM-prefork instance to run some Drupal6 applications on the same host machine and utilize a vast selection of PHP modules that run on the prefork model. I plan to use my MPM-worker instance to reverse proxy to the Apache2-prefork instance for URLS starting with myhost.com/drupal6/. It seems theoretically doable/configurable by having the second Apache2-prefork instance configured to listen on an internal port, say 127.0.0.1:8080 and having my current Apache2-worker configured to proxy pass and reverse pass to it for the 'drupal6' URLs. However, how do I compile or install the apache2-prefork version so it has a different executable name than /usr/sbin/apache2, for example /usr/sbin/apache2p, and so apache2ctl has a different name, say apache2pctl, and that apache2pctl invokes the /usr/sbin/apache2p instead of /usr/sbin/apache2... and so on down the line (eg /etc/apache2p) so I can start and restart my two instances independently? As I understand it, no one executable of 'apache2' can be compiled with both the MPM-prefork and MPM-worker modules, so it seems I need two separate versions of the apache2 MPM flavors. But then I need to invoke and control them by separate names, I assume. I looked at the configuration options for apache2 and I am a bit queasy about compiling a second apache2 version with prefork because I am not sure I can set all the options so that none of my current apache2 files is overwritten. Is there a way? Is there a standard solution to separately installing and controlling prefork and worker apache2 executables on the same machine without them stepping on each other during installation or operation?

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  • "postgres blocked for more than 120 seconds" - is my db still consistent?

    - by nn4l
    I am using an iscsi volume on an Open-E storage system for several virtual machines running on a XenServer host. Occasionally, when there is a very high disk I/O load on the virtual machines (and therefore also on the storage system), I got this error message on the vm consoles: [2594520.161701] INFO: task kjournald:117 blocked for more than 120 seconds. [2594520.161787] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [2594520.162194] INFO: task flush-202:0:229 blocked for more than 120 seconds. [2594520.162274] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [2594520.162801] INFO: task postgres:1567 blocked for more than 120 seconds. [2594520.162882] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. I understand this error message is caused by the kernel to inform that these processes haven't been run for 120 seconds, most likely because a disk access to the storage system has not yet been processed. But what is the effect on the processes. For example, will the postgres process eventually write its data when the storage system is idle again after a few minutes, so that all data is still consistent? Or will it abort the write, leaving some tables in an inconsistent state? I certainly expect that the former should be the case - if the disk access is slow, postgres (or any other affected process) should just wait as long as it takes. I can live with the application hanging for a few minutes. But if there is a chance for data corruption then any of these errors is really bad news. Please advise what to do here.

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  • Keynote presentation in conjunction with other app?

    - by Sören Kuklau
    The short version: I'd like to tell Apple Keynote to switch to a specific app (never leaving full-screen mode) before a certain slide appears, then display that slide as soon as I switch back. Some more details: I'm going to show off five major improvements in an upcoming release of our app. I want one slide highlighting the feature, then one or two showing some details, perhaps with screenshots. After that, so people get a better impression of what I'm talking about, I'll show it off live — to do this, I have to switch to a VM or remote session (since this is a Windows app). Then, I'd like to switch back and go to the next feature. I.e., it would be similar to Apple's "Demo" slides in a cursive font, except not with a different screen, or different computer. It's this switching back and forth that I want to make smooth, just to wow the audience a little. Can I perhaps do a "special" slide in Keynote that tells it to run an AppleScript? Better yet, to switch to an app, and wait until I switch back, and then automatically advance to the next slide?

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  • What benchmark tool to use to benchmark hardware for VM server?

    - by Mark0978
    We are setting up a new piece of hardware to virtualize several of our servers on. Choices are RAID 5, RAID 6, and RAID 0+1. We are wanting to benchmark all three before we go live with the machine, but I'm not sure how to test the speed. Since we will be using it to host VMs, what will the actual disk traffic look like? What can I use to see if RAID 6 is too slow? Short of setting up the system with all the VM's on it and running that way, then redoing on all the work, I'm not sure how to test it. It them becomes more of a subjective test than an objective one. I'm worried that RAID6 will have too much overhead, that RAID5 will be to fragile with 3TB drives and I've never worked with 0+1 at all. So in short I'd like to setup the base machine (which will be running Linux) and then test the underlying SW RAID for speed. What kind of tool exists to simulate this kind of load? Barring the lack of a specific tool, how about a generic FS testing tool that will simulate different loads?

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  • Does Hyper-V support SCSI Pass-through discs in a Server 2003 R2 VM?

    - by Peter Bernier
    I'm running into some difficulties getting pass-through disks to be accessible to a Hyper-v server 2003 r2 virtual machine. Host OS : Server 2008 R2 full w/Hyper-V role Guest OS : Server 2003 R2 (Windows Home Server) The guest's OS disk is a pass-through disk on the IDE controller (not the best solution, but I can live with it). My storage disks will be pass-through disks on the SCSI controller. I'm able to see all of the disks that I'll be using for the VM on the host without issue. The problem that I'm having is that I can't seem to get the guest OS to be able to 'see' the storage drives (as pass-through disks on the SCSI controller). Here's what I'm doing : On the host, the storage drive is set to 'Offline' just like the OS disk (this is required for pass-through to work). In the VM, the storage drive is on the SCSI controller. Hyper-V Integration Tools are installed in guest. That's as far as I'm able to get. I don't see the drive in Computer Management, or in Windows Explorer (I've tried with an unformatted disk, as well as after formatting a partition). I am able to see a removable device that lists the disk's model number in the Guest, but I can't seem to access the storage. (I get an entry in Device Manager that needs drivers, but nothing on the Integration Tools disc works..) Trouble-shooting steps I've tried : If put the pass-through drive on the IDE controller, I can see it in the Guest. If put the storage drive 'Online' in the host and create a VHD on it on the SCSI controller, I can see it in the Guest. I suppose I could create a fixed-size VHD that consumes the entire disk, but I'd rather not have that overhead. I've also extracted the contents of the Integration Tools drivers (x86 and amd64) and tried pointing the disk controller to each of those, with no luck. Can anyone offer suggestions as to how I can get this to work properly?

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  • Ubuntu rm not deleting files

    - by ILMV
    My colleague and I have been struggling with deleting a directory and its contents. We are working on a new version of our websites source code on Ubuntu 8.04 (dir: /var/www/websites), what we want to do is delete the websites directory and recreate it from a .tar backup we created a couple weeks ago. The purpose of this is so we can run our deployment procedure in a local environment before we do so on our live / public environment. We use this command: rm -r websites This deletes the directory and the files within it. The problem occurs when we un-tar our backup file and view the website we are getting files that don't exist in the .tar backup, in fact these files were only created a few days ago and should have been deleted. We delete the directory once more in the manner stated above, we then create a new websites directory using the mkdir command. Strangely at this stage the 'deleted files' do not come back, but if we unpack our .tar file the 'deleted files' appear again. Is there a way to ensure these files are deleted, or at least the pointers that associate them with said directory. Our .tar backup does not include these files We do not want to use the shred command We do not want to use 3rd party applications Solution should be functional via terminal (SSH) Many thanks! EDIT Er... we fixed it. Turns out the files that are reappearing are because of a link we have to another directory (outside the /var/www/websites), we were restoring the link but not deleting the files on the other end. D'oh! Many thanks for your help guys... friday afternoon syndrome :-)

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  • Clustering/load balancing for cluster unaware applications

    - by AaronLS
    Forgive me if I use any of these terms incorrectly. I am wondering if there is any kind of software that would allow my two "join" two computers together such that a cluster unaware application could utilize their combined computing resources? By "cluster unaware" I mean an application that isn't designed to share work across multiple services. My understanding is that clustering is enabled by the specific application by it's architecture, such that messaging with multiple instances of the application coordinate the sharing of work. Instead I am looking for something that enables clustering at the OS or virtualization level, so that any application could essentially be clustered. Failing that, I am also wondering about the following scenario: We have 3 different applications we will call A, B, and C. We have 2 single core computers. At any given time lets say that any combination of those applications will be CPU intensive. In cases where only 2 of those apps are very active, have one of them moved over to a different server. In a nutshell, some sort of dynamic automatic shuffling of the application's load. I have heard of virtual machines that can be migrated across physical machines while live, but I am wondering if this can be done automatically in response to an application's or VM's CPU activity?

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  • Copying symbolic links and filenames with special characters to NAS

    - by Mr E
    I have a new Western Digital My Book Live NAS. I am trying to copy files from an old drive to the NAS. I'm using Ubuntu 12.04 and I've mounted the drive by browsing the network in Nautilus and choosing a shared folder configured on the NAS. The shared folder is then automatically mounted at .gvfs/files on mybooklive. There are two problems so far: File names and directory names containing certain characters (e.g. : or |). Attempting to copy these results in the error message: cp: cannot stat `/path/to/destination.filename': Invalid argument Symbolic links. In Nautilus I get the error message: Symlinks not supported by backend My questions are: Can I connect to the NAS or configure the NAS so that I can copy my files without this problem? (In case it matters, I don't need Windows compatibility.) If not, what can I do to identify all the problem files? Can I do anything to automatically fix my filenames Please let me know if any of this needs clarification. I'm not too familiar with all of this so I may have left out some useful information.

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