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• Cheap machine with Xen to have more than one personal dev servers with RAID option?

  - by AJ

  I do not have a lot of money so when I need a personal dev servers I decided I will use Xen on one machine to run various OS's. Although, I really like Dell Zino (http://www.dell.com/us/en/home/desktops/inspiron-zino-hd/pd.aspx?refid=inspiron-zino-hd&cs=19&s=dhs) as a very economical and compact PC which can be scaled to 8GB of RAM, I do not know how to have a RAID setup, for the backup. Is there an economical way to add a RAID setup to Dell Zino or I would have to invest in a proper box for that? Thanks for your help in advance. **Also, please let me know if this question is not meant for this forum.

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• VMWare ESX installation on sata disk

  - by ilansch

  I have a PC with Gigabyte H77 motherboard with Intel I5-3550 CPU 8 GB RAM 1600MHz and a 500GB Harddisk (7200RPM) - WD Sata III disk I wish to install esx on it and run some virtual machines on it. not alot, something like 2-3 VMs. My hardisk is Sata, is it possible to install ESX Server on it ? I am not worried about loading issues. When i try loading the installation it writes it cannot detect my disk (since its not SCSI disk). How can i bypass this ? or find a solution. thanks

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• Thermal risks to other components when watercooling CPU

  - by B Sharp

  I recently ordered all the components for a new desktop system to replace my old, dying computer. I wanted to have a really quiet desktop, so I got a case rated for being quiet and opted to try a closed-system CPU water cooling kit (Antec Kuhler H2O 620) that was on sale for a very good price over the Thanksgiving weekend. Most of my components are still in transit, but I became somewhat worried when a friend mentioned that abandoning air cooling units can result in heat buildup inside the case due to heat generated by the video card and other components such as RAM, the northbridge, MOSFETs and voltage regulators radiating heat that the CPU fan would normally at least keep circulating around so it doesn't build up in localized areas. Is this a realistic problem? What other precautions should I take to remove heat from other components? Adding more case fans seems like it would get really noisy. Are there quiet alternatives?

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• How can I simulate a slow machine in a VM?

  - by Nathan Long

  I'm testing an AJAX-heavy web-application. I develop on a new Mac, but I use VmWare Fusion (currently 3.1.2) to test in Windows XP, using IETester to simulate older versions of IE. This lets me see how older IE versions would render the site, but I'd also like to see how the site would perform on an older machine. I see in the VM's settings that I can decrease the RAM; is there a way to also dial down the processor speed? How else might I simulate a slow machine? (I am also going to check out how to simulate a slow internet connection.)

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• Mountain Lion screen crashes after returning from sleep

  - by Aron Rotteveel

  During the past 3 days I have experienced the following issue: when returning from sleep, I see an extremely garbled version of my desktop. The only thing that seems to help is a reboot. My first guess is that this is related to the video card. After looking into this issue, I found a lot of problems related to ML and returning from sleep, such as this post on AskDifferent, but I think this is a different issue because it does not speak of a garbled screen. Some more details: System: MacBook Pro 15" early 2011, 2,2GHZ I7, 8GB Ram, AMD Radeon HD6750M 1024 The issue seems to happen only when I open my laptop in the morning; if I close and open my laptop during the day, it does not seem to happen. The issue 'solves' when rebooting. Photo of how this looks: Update November 27th 2012: I re-installed my laptop a couple of weeks ago, which seemed to have solved the problem, but sadly, it still persists.

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• unable to install mysql completely on debian 5.0

  - by austin powers

  hi, its been a couple of days that I'm trying to install mysql on my vps which has debian 5.0 with 256mb ram. I've installed webmin also. here is the symptoms : after installing mysql using either webmin or apt-get I am trying to connect to mysql for changing root password but every time I cope with this error : ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES) so I start to investigate and I understand there is no root user inside mysql database when I use : UPDATE user SET password=PASSWORD('newpassword') WHERE user="root"; it says 0 row affected I reinstall mysql for several times but the same problem still exits. please help me how can I install mysql-server as well as mysql-client correctly. regards.

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• VMware Fusion / New Machine / verify VMs?

  - by drewk

  I just got a 15" MacBook Pro with 8GB RAM, 2.66 i7 and 500GB SSD. Very sweet and fast! My old machine was 2.66 Core 2 Duo. I used Migration Assistant to migrate my old MBP to the new. When I started VMware to run Windows and Ubuntu I got the message first This VM has been moved or copied to a new machine. Did you move or copy it? I answered Copied. Then I got the message this CPU is a different configuration than the machine that created the VM. You may get unpredictable results. I answered Open Anyway. Windows XP, Windows 7, and Ubuntu all seem to work OK, but how can I verify? Is there some form of test harness for a VM? I have had a VM degrade and become unusable with very catastrophic data loss (on Parallels...), so I am a bit paranoid. Thanks,

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• let mysql use full resources

  - by shekhar

  We have a Windows server 2008 R2. It has 24GB RAM and 2.926 Mhz, 8 Core(s), 8 Logical Process. We have a large MySQL database and it's taking a lot of time to execute some queries. But while running queries, I have observed it's NOT utilizing full resources. I am thinking that if I let MySQL utilize maximum resources on my server, it can reduce execution time. How can I let my MySQL server utilize maximum resources in a healthy way?

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• Why am I seeing excessive disk activity when installing applications?

  - by Kev

  I'm running Windows 7 Ultimate 64 bit on a Dell Vostro 1720 with 8GB of RAM, 7200RPM Disk, 2.53 GHz Core2Duo (Windows 7 64 bit is a supported option and the laptop came with the OS pre-installed). I'm noticing some fairly excessive disk activity when running installers. For example the Visual Studio 2010 RC installer constantly accessed the disk for ~10 minutes. It was so excessive that I was unable to use the machine until this ceased. Today I installed Trillian Astra 4.1 for Windows (latest build from the website). Again when I ran the installer I was pretty much locked out of the machine until the disk activity calmed down. In both cases when I eventually managed to launch task manager I could see that the CPU was sitting at around 5% to 7% utilisation whilst this was going on. All other disk related activity is fine, the machine is snappy and applications launch without delay. It's just when I run an installer I see this odd behaviour. Why would this be?

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• Understanding why a 450W power supply is destroying my ATX motherboards but not mATX

  - by T. Webster

  Maybe I'm missing something really obvious here, but after going through 3 new motherboards in trying to build my new machine, I'm finally certain that the 450W power supply I bought has been destroying them. It seems like it should be simple: just connect the connectors where they fit and switch the thing on. But today after hooking it to my ASUS Sabertooth 990FX TUF Series Motherboard and switching it on, I could see and smell the smoke coming out of the motherboard. What I don't get is why I can hook this same 450W power supply up to my mATX motherboard and not run into the same problem. What am I missing here? Where on the box or manual is this? (I have 8x2 GB RAM, AMD FX-4100 3.6GHz CPU, 1 512MB ATI graphics card, 1 WD 7200 RPM SATA hard drive. )

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• Minimalistic flatfile-based "wall" PHP app with authentication and RSS?

  - by Nicolas Raoul

  I am looking for an open-source minimalistic "message board" PHP software. Not a forum, more something like one simple facebook wall. The only thing a user can do is post a new message. With RSS, and able to run on flat files (no database) with Apache+PHP Authentication based on a configuration file, no management UI needed. For now I use this software, but it lacks RSS: http://nrw.free.fr/data/projects/pano/demo/index.php?pano=ifc Anyone knows a software that matches my description? Thanks! Usage: communication between my family's 5 members living on different continents.

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• Script errors when run by launchd at startup, but not when run in Terminal

  - by Mechcozmo

  I'm attempting to create a RAM disk that loads the previous contents when the system starts up, and every six hours writes the contents to a disk image. Currently, when you run the script from the terminal ("sudo bash LogToRAM.sh") everything works fine. But when run from launchd during startup, it doesn't work. Here's the lines from the log; the first line just gives some idea as to where in the boot process we are: SecurityAgent[202] Showing Login Window com.mechcozmo.LogToRAM[51] + /Developer/usr/bin/SetFile -a V /Volumes/LogfileRAMdisk com.mechcozmo.LogToRAM[51] ERROR: File Not Found. (-43) on file: /Volumes/LogfileRAMdisk com.mechcozmo.LogToRAM[51] + /usr/sbin/asr -source '/Library/Application Support/LogToRAM/RAMdisk_store.dmg' -target /Volumes/LogfileRAMdisk/ -noverify Here is the script and plist file in question. Note that 'set -vx' is up at the top of the script; it give a lot of information about what is happening in the script. My current theory is that the /Volumes directory does not exist at this stage of the boot process, but that seems unlikely to be honest.

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• Amazon EC2- many micro-instances vs single small/medium instance

  - by shashankaholic

  I have a chat application using stack of Openfire, Tomcat6 and MySQL. Currently, i have installed all these servers on single Linux micro-instance(613 MB memory). Even in low user base 10-20 i am encountering CPU overload which is quite obvious here. As, i am new to Amazon EC2 can somebody suggest me how to scale up my architecture according to traffic use? should i use separate micro instances for every app server(openfire,mysql,tomcat6) should i use single small or medium instance for whole server stack. Some factors in context: high reliance on MYSQL high memory usage due to file transfer web-application interacting with other Amazon service like S3,SES

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• Areca 1880ix RAID hangs

  - by Dave

  Areca RAID controller ARC-1880ix-12 (firmware 1.50) hangs when on high load. My setup is: Chenbro 3U chassis Intel S5500BC mainboard Xeon 5603 CPU 16GB of RAM 12 Seagate SAS drives ST32000645SS (2 of them as hot spare, 10 as RAID10) Mellanox Infiniband HBA card This server is working as external infiniband storage for Xen VMs. When load is quite big Areca's firmware hangs - it becomes unreachable even from Areca's ethernet adapter. After resetting the server power it returns to normal operation. While Areca is hanged I can confirm that it is powered (ethernet link is active) and Infiniband HBA works Ok. Thanks in advance for any idea or suggestion where the problem might be!

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• Is there a RAR extractor (for multiple rar files like .r00 etc.) that will use all of my quad cores?

  - by Christopher Done

  I've got a quad core Intel processor. I've got a big file split into little ones as RAR files, foo.r00, foo.r01, etc. which the RAR program extracts into one file/directory. Is there a RAR program that I can specify like "use four cores" in the extract process? At the moment it sits there using 100% of one core. I recognise the bottleneck might be my hard drive anyway, but I don't see a lot of HD usage and suspect the decompression process is more intensive than waiting on I/O. For example, GNU Make accepts a (-j, I think) argument to tell it how many cores to use, which I used to compile PHP 6 really quickly.

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• Looking for Kiosk-style / camera store easy photo memory card to CD/DVD burning program for Windows-7 Notebook? For non techie user.

  - by Rob

  I'm looking for a Kiosk-style / camera shop easy photo memory card to CD/DVD burning program? For non technie user. The kind of system you see in a camera shop / store, e.g. in the UK, Jessops and Boots stores. This is for my Dad who is adept at general PC usage as a notebook owner, but would prefer something fairly simple. The task of burning photos to CD/DVD, in their original photo file .jpg form, i.e. NOT as CD or DVD video or slideshow, is what I'm looking for. I'm guessing this might be possible in Picasa, but all the options available might be superfluous and confusing. He could probably learn to use that but thought I would try simpler options first. Looking for something that guides the user through the steps/stages of the process, 'Wizard' style. Any suggestions? Platform: HP Windows 7 Home notebook with CD/DVD burner and SD memory card slot.

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• Monitoring host and app parameters in real-time

  - by devopsdude42

  I have a bunch of VMs that I need to monitor in real-time. For all nodes I need to watch host parameters like load, network usage and free memory; and for some I need app-specific metrics too, like redis (some vars from the output of INFO command) and nginx (like requests/sec, avg. request time). Ideally I'd also like to track some parameters from the custom apps that run on these node too. These parameters should get tracked as a bunch of line charts on a dashboard. I checked out graphite and it looks suitable (although the UX and aesthetics looks like it needs some love). But setting up and maintaining graphite looks to be a pain, esp. since we don't have a full-time person just for this. Are there any alternatives? Or at least something that is simpler to setup and will scale? Reasonable paid services are also ok.

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• How to dual OS 32-bit/64-bit Windows 7 Ultimate.

  - by Cyril Horad

  I have a problem with regards to my nVidia driver not running on 64-bit. I decided to install both 32-bit and 64-bit on my ASUS K42JC (4GB RAM upgrade) in order to function the nVidia on the 32-bit. My question is, how could I make my laptop run on either 32-bit or 64-bit OS. What options I am suppose to use, a single, double, or triple partition? From an answer: Well. When I installed the nVidia driver from either the ASUS site and the prescribed driver from NVIDA site via System Requirements Lab, both ended up freezing my laptop to the point when the desktop is about the finish booting. I have tried three(3) times reformatting and trying to fix the problem. Yet no use. I filed a ticket to the Asus support but for now no replies yet. But this bothers me, why wouldn't the nVidia run on 64bit yet it runs perfectly on 32bit.

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• Upgrading Mac OS X 10.5.8 Corrupted Lightroom 2.7

  - by Tedd

  I use Photoshop CS4 and Lightroom 2. I recntly upgraded to 10.5.8 and began to have issues with LR. So, I reinstalled and downgraded my OS. I'm now running 10.5.2 on my MacBook 2.4G Core Duo with 4G RAM. Everything works fine now, but the downgrade also resulted in having only Safari 3.0.4 and and older version of iTunes. I can't upgrade either of those until I upgrade the OS but I'm reluctant to do so because I might have problems again. Any suggestions? Install 10.6 instead? What kind of issues can I expect from that?

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• ATI AMD Radeon 6670M 2GB Dual External monitors

  - by kellax

  I have HP Pavilion dv7 BeatsAudo model: dv7-6b with following specifications: CPU: Intel i7-2670QM ( Quad Core ) 8 CPU's @ 2.2Ghz RAM: 8GB @ 1066 GPU: ATI Radeon HD 6770M 1GB Notebook has two slots: HDMI and VGA On my VGA i have an external monitor 24" Samsung, any idea if my notebook could support a second external monitor as well. I do a lot of development work, i havent got a second monitor to test it yes but i know there can be problems. I would like to have a monitor connected on my VGA and on my HDMI so two external monitors and notebooks monitor. Would this be viable ?

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• Is there a free tool/package that can monitor web traffic and display URLS accessed? [closed]

  - by Anthony

  I couldn't find a similar question but then maybe I am searching for the wrong terms. A few years ago I used a router like device, I'm pretty sure it was a SonicWall, that did this on a clients site. Basically all traffic would be routed through this device and it allowed the manager/administrator to inspect web usage of the workers, determine how often certain resources were accessed and block them if necessary (much like content filter). It showed reports based on domain name reached etc. Facebbok.com, Bebo.com and so on. It also displayed the usual IP traffic information etc. it was a UTM also. I have tried Endian firewall, with it's NTOP install, but I don't think that will show URLs browsed. Maybe I just haven't found it in NTOP yet? I need this to troubleshoot connection and traffic issue at my home, with about twenty devices/users so didn't want to buy a dedicated solution and have spare hardware to use a community product.

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• New video card? [closed]

  - by TutorialPoint

  I ran into some problems with my ATI Radeon x1200. I want it to support vertex shader 3.0, but it only does 2.0. This is because Call of Duty: Modern Warfare 2 only works with 3.0. So, I want a new video card. Can someone help me, with a more clean look to it? I bet if I would stick to some seller, I would end up with a video card that does not support what I want, or is too expansive. I really do not want it to be above $75, if possible. Some info about my PC: Manufacter: XXODD Processor: AMD Athlon64 X2 DualCore 4000+ 2Ghz (but running currently 32 bit OS) ATI Radeon X1200 video card (the problem) 1 GB RAM DDR2 MS-7367 Motherboard Windows 7 Ultimate OS 32-Bit Build 7600 RTM

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• what can I do with an old but working PC [closed]

  - by fskreuz

  I have an old Dell optiplex GX240 on Pentium 4 1.8Ghz and 256MB Ram (or was it 512MB). It's still in working condition but it's getting slow for me and i wanted to optimize it. I just want that old box to be usable even for simple desktop use (email, surfing, chat). I also have to note that my parents prefer use it over a laptop for some reason. Treat it as a "box-type netbook". unlike the other threads that they all prefer sending away or use as file server, firewall and that, i am looking for suggestions on how to keep it usable as the main PC. any suggestions? OS perhaps?

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• Network and log monitoring and vulnerability scanning

  - by user137799

  I am trying to find out if there is any application or service in UNIX that will - 1. Monitor network interfaces for bandwidth usage 2. When network flaps occur send out a e-mail. 3. When duplicate mac-addresses or loop occurs in network - send out alerts. 4. Do a network vulnerability scan and be able to detect utorrent application on our network. Need to know which linux distribution will be best to support that specific application Thanks

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• cygwin rsync over ssh very slow

  - by Waleed Hamra

  I have 2 machines running Windows Xp SP3. I have cygwin installed on both, version 1.7. I have rsync and ssh installed on both, and configured using default settings as per ssh-host-config and ssh-user-config programs provided. I moved the public keys into their respective locations, and basically ssh is working fine. i began an rsync operation, using: rsync -av --delete --hard-links local_dir username@other_machine:/some_dir well... on both machines, the processor is running near idle, no heavy usage. I checked IO using process explorer on both machines, and that too is at normal levels (1~2 MB/s), so I can't see where the bottlenecks are, because network performance is aweful. I'm not going over 1MB/s... when a normal file copy using windows sharing achieves some ~10 MB/s.. What could be wrong?

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