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• Platform to allow users to suggest and vote for ideas

  - by Simon

  I head up a support team for a software product. I am in the process of setting up a blog (Wordpress.org), a forum (PHPBB or maybe Vanilla), a means to view bugs (probably expose Jira), but would also like to allow our customers to suggest enhancement requests. Currently we have this as a 'contact form' via the blog, which feeds into a dedicated inbox, which the product manager reviews and may include some of these ideas into the product. However, I would like to give the clients more power/visibility over this. Have a look at ideas.arcgis.com. There are plenty of other similar sites as well. Users can suggest new ideas Other users can vote these ideas up or down (similar to Stack Exchange sites) Ideas that are voted highly will be given a higher priority over lower ones. We can report back on the # of ideas we implement, and potentially reject ideas with reasoning. Has anyone seen any platforms (ideally free) which would replicate something similar to this? I was half thinking of embedding Vanilla within a wordpress page, but need to look into it more.

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• using i7 "gamer" cpu in a HPC cluster

  - by user1219721

  I'm running WRF weather model. That's a ram intensive, highly parallel application. I need to build a HPC cluster for that. I use 10GB infiniband interconnect. WRF doesn't depends of core count, but on memory bandwidth. That's why a core i7 3820 or 3930K performs better than high-grade xeons E5-2600 or E7 Seems like universities uses xeon E5-2670 for WRF. It costs about $1500. Spec2006 fp_rates WRF bench shows $580 i7 3930K performs the same with 1600MHz RAM. What's interesting is that i7 can handle up to 2400MHz ram, doing a great performance increase for WRF. Then it really outperforms the xeon. Power comsumption is a bit higher, but still less than 20€ a year. Even including additional part I'll need (PSU, infiniband, case), the i7 way is still 700 €/cpu cheaper than Xeon. So, is it ok to use "gamer" hardware in a HPC cluster ? or should I do it pro with xeon ? (This is not a critical application. I can handle downtime. I think I don't need ECC?)

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• Why did you start with Linux ? And why did you continue using it ?

  - by Stefano Borini

  I'd like to know the reasons that moved you towards Linux. Personally, I started because we had to use a Digital for the Fortran 77 exercises during my first year at the university. Linux was installed on many university computers, and I got interested in it. I always liked to code (on the C64) in basic and assembler, but I knew nothing about other languages. I soon discovered a chat engine called NUTS, and the idea of becoming proficient in C appealed me, so I started hacking the code. To do so, I needed a Unix at home, so I bought a Slackware 3.4 and installed it on my Pentium 166. I then continued using it for many years, reason being that I had pleasure in learning new things and the openness of information about the internals. It was a great learning platform. I then moved to osx because I enjoy the power of Unix with the beauty and efficiency of its interface. I am interested in your answer because I believe that the panorama has changed somehow. Although I still guess to find many "hackers" interested in Linux for the sake of knowledge, I also believe that there are other reasons (work, friends, bought a netbook).

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• WINDOWS: Your computer hangs. You can windows + R (run dialog) but performance is so halted taskMGR

  - by John Sullivan

  The question is, what process are available to try to recover from total system instability before pulling the plug when we can do nothing but programs or batches in the path from the run dialog (windows + r key), and performance is so dead that taskMGR / procEXP / other programs with visual guis are not usable? I am not a windows expert, but ideally someone out there has written a program that does more or less stuff like this: Immediately set (or perhaps I can set from the run prompt) its priority to extremely high, evaluate performance bottlenecks. E.g. is CPU 100%? If so identify offending program(s) or problems. Attempt / log fixes, then provide crude feedback asking the user if his performance has stabilized enough to abort, wait a few seconds, if no feedback continue, etc. etc. Eventually try to do any "system cleanup" if the program decides it cannot recover and perhaps finally provide a series of beeps to the user, or what have you, to say "OK, I give up, time to pull the plug". Ideally create a log, when able. These kinds of horrible hangs are a situation where surely trying something, anything, is better than nothing -- as long as that something is intelligent -- when the alternative is ripping out the power coord. Again, I am not a windows expert, so perhaps there is a much more elegant "hands on" approach I am not aware of.

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• Systemd Service Start With Dynamic Port Value From Docker

  - by Sheriffen

  Using CoreOS, Docker and systemd to manage my services I want to properly perform service discovery. Since CoreOS utilizes etcd (distributed key-value) there is a very convenient way to do this. On systemd's ExecStartPost I can just insert the started service into etcd without problems. My usecase needs something like this: ExecStartPost=/usr/bin/etcdctl set /services/myServiceName '{ \"host\": \"%H\", \"port\": 5555 }' which works like a charm. But this is where my idea popped up. Docker has the power to randomly assign a port if I just run docker run -p 5555 which is awesome since I don't have to set it statically in the *.service file and I could possibly run multiple instances on the same host. What if I could get the randomly assigned port and insert instead of the static 5555? Turns out I can use the docker port command to get the port and with some formatting we can get just the port with $(echo $(/usr/bin/docker port my-container-name 5555) | cut -d':' -f2) which works if I set it (using bash) like this: /usr/bin/etcdctl set /services/myServiceName '{ \"host\": \"%H\", \"port\": '$(echo $(/usr/bin/docker port my-container-name 5555) | cut -d':' -f2)' }' but using systemd I just can't get it to work. This is the code I'm using: ExecStartPost=/usr/bin/etcdctl set /services/myServiceName '{ \"host\": \"%H\", \"port\": '$(echo $(/usr/bin/docker port my-container-name 5555) | cut -d':' -f2)'}' Somehow I got something wrong but it's hard to debug since it works when typed in the terminal.

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• No audio with streaming video

  - by Chris Barnhill

  I am having trouble with audio when playing streaming videos. My sound card is fine. I know this because if I play sounds from my local machine, there's no problem. It's only when I try to play sounds from the internet that I lose audio. This only started happening recently when I did 2 things: I connected a USB headphone/microphone set to record screencasts I began recording/publishing screencasts from screenr.com. I have tried playing video both with the headset connected and without it connected: it makes no difference. If I record a screencast on screenr.com and preview it, I hear the audio. But once I publish is and play it, there is no audio. I also hear no audio with YouTube videos. I really hope someone can help. Thanks. The latest is that the problem went away after I powered my system off and on. A reboot didn't do it, I had to actually shut down the power.

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• Computer won't start up. Stuck on Lenovo splash screen. Help Diagnose

  - by Ace Legend

  I have some (I'm not sure exactly what model) Lenovo 21" IdeaCentre. Honestly, the computer works off and on. I have had problems with it not being able to shutdown, which I fixed. The fan seems to be constantly running, a few other problems as well. Anyway, nobody was using it when all of a sudden it switched to a blue screen. I was in the kitchen, but when I got over to the computer I read the message. It said something about bad drivers, but that is all I saw and then it restarted. However, when it got to the Lenovo Splash screen, nothing happened. I waited there for over 10 minutes, but still nothing. I tried to turn of the computer, but the only way to do it was to pull out the power cable. I then removed all USB devices and tried again. Still nothing. It also won't respond to keyboard input when I try to use enter to interrupt normal startup. My guess is some piece of hardware is damaged inside the machine. However, I have no idea what piece it is. Does anybody have any idea what could be wrong with it? Thanks.

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• Ubuntu 10.10 - disaster - what other linux for beginner?

  - by A-ha

  Guys, I've tried to install ubuntu (desktop and notebook ed) on my laptop and unortunately I have to say that as despite the fact that installation process supposed to be easy I couldn't finish installation of this system - didn't detect my keyboard or rather lost my keyboard as soon as I tried to switch on/off pad on my laptop. After I've discovered that, I started all over again (this time without touching my laptop's pad during installation) and yes, eventually it get to the end of installation. Unfortunately, when I've tried to switch my pad (sometimes I just do not want to use a mouse) the whole system froze. So I had to restart it with the power button and this time I didn't touch pad at all, plugged in mouse and tried to rearrange taskbars according to my liking (all taskbars on the top side of the screen and auto-hide on) and I gave up. It is so unfinished that I just can't be bothered to use it. I would like to have one linux system on my machine so I started googling and most of the links are to either ubuntu (which I just do not want to touch for now) and suse or commercial versions of linux. I do not really mind paying for something (and having experience with ubuntu I'd rather pay and have something pro then get it free and discover that it's unusable). So could someone please provide short list of linux distros which would be appropriate for a beginner, and I don't mind paying for it, I just want it to be a professional product.

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• PHP on several servers with session-sharing

  - by Etu

  there's certanly other threads about this, but I have one more question. We are about to scale the website at work to have more than one server. And we need to share the sessions between the servers. We have been looking into different solutions, one in memcached and use Memcached as sessionhandler in PHP. That will probably work. And the idea would be to run memcached on every machine and let all webservers access all other servers memcached servers, and then we have shared sessions between the machines, yay. (we have no resources to setup with sticky-sessions yet, that's a later project. we need this running, and we need this running now. and we will loadbalance with DNS for a starter) But then... If I want to take one server down, say, for maintenance, or a server crashes, or whatever reason. I don't want the users to just loose their sessions and have to start from the beginning... That's why we need some kind of replication, which Memcached does not support. Then I found http://repcached.lab.klab.org/ -- which has multi-master replication of memcached, which is great, and is what I want. But does it work with 2 machines? Say 3, 5, 10? For future scaling. I also looked into redishttp://redis.io/ -- which also seems great, but is a bit more "shaky" with the php-session-handler support, and no multi-master-replication. The thing is that I like to use memcached, but I want to be able to power down one of two boxes without loosing half of the sessions. Any suggestions?

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• Some of my keys are automatically being pressed along with other keys

  - by Santosh

  History The last time when my computer shutdown was a power failure. Now some keys are automatically being pressed when I type something. The last thing I did to keyboard setting was adding a keyboard layout (on Ubuntu). What is happening Whenever I press c, xc is writeen s gives me sd d gives me sd e gives me we 2 gives me 23, So when I want @ it gives me @# 3 gives me 23 Pressing CAPS Lock gives me F3 and vice-versa. All other key are either working fine or I don't use them. I have two operating system Ubuntu and Windows, I use Windows very less and found this problem on Ubuntu, but as soon as I logged in to Windows (for checking) then I found that Windows has the same problem. Effects on my life This starts form the time of login, even I have problem in typing my password. Whenever I try to save any webpage, it is bookmarked automatically. Whenever I copy, it is cut automatically. I have to spend more than half of time correcting what I have typed. Note: Typing thisd quwesdtion wasd rweally a big pain to mwe.

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• HP/IBM alternative to Buffalo iSCSI TerraStation?

  - by Robin Day

  I'm looking at virtualising some of our infrastructure in order to allow for more resiliance and future expandability. We have successfully virtualised on single servers with Direct Attached Storage and are now looking for a more future proof solution using a high powered host (or two) and a SAN (or two). I'm thinking that the host machine will probably be an HP ProLiant DL360 G7 (all of our exisiting infrastructure is HP). Unfortunately, I am new to the world of SANs. From what I can see, the Buffalo Terrastation III is all I would need in order to setup an iSCSI SAN for VMWare to use. However, I'm a little reticent to go that way as it's a bit too "entry level" for my liking. In particular I would be very keen for more redundancy, power, networking, etc. I'm also very aware that you "get what you pay for". Therefore, can anyone reccommend equivalents from the big boys? HP/IBM? I have searched high and low on the HP site and seen many options but am struggling to work out if it is all the hardware I will need. Some options appear to need separate controllers from disk enclosures, etc.

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• VMware Workstation Bridged Network Host UnReachable

  - by user2097818

  VMware Workstation 7 on Win7-64 (Home Premium). I have confirmed this on any guest running on this machine (from winxp to debian). I am using a bridged network connection for my guests (Automatic on VMnet0). All of the network configuration is done with DHCP (including on the host). Problem What I can not do: Ping my host machine from inside any VM. (either shows me "Destination Host Unreachable" or will just timeout) What I CAN do right after power up, with no problems at all. I can connect to the internet from inside the VM I can ping my router from inside the VM I can ping other machines on my network from inside the VM Other machines can ping the VM Other machines can ping the host My host machine can ping the VM (this one is important. read further) Details So I have my router assigned as 192.168.2.1/255.255.255.0, and the router provides the DHCP service (and it seems to be doing so successfully). There are no IP conflicts on the network that I am aware of. All Gateways and Subnet masks are appropriate and matching. My entire workshop is on one single subnet, with one single DHCP server and gateway. There is one method in which I can ping successfully, but it requires an active connection initiated from the host (I start pinging from host to VM). During the period of the active connection, I can successfully ping from VM to host, using explicit IP address. As soon as the host connection is closed, the VM ping starts hanging with the same old messages. My Thoughts This really feels like a firewall problem, but I have turned off all firewalls on host and VM, powered down the network, powered back up, and the problem still persists. And if it was firewall, why would only the IP address associated with bridged VM networks be blocked. I feel as though my host operating system (Win7) is somehow configured incorrectly, or, VMware Workstation is configured incorrectly from the host side. Although I have done my best to put everything in default, I feel like I am missing something silly.

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• Assigning cores to VM in vSphere

  - by user114933

  Complete vSphere newbie here... Background: So, I have a 12 core machine with 24 VMs on it. Currently, all the processing power is shared between these VMs equally. The question: Can I configure one VM to be given two CPU's worth processing no matter what's happening on the other machines? My Research: I tried two things in vSphere... I set the reservation and limit on one VM to equal the same as two cores. To test if my objective was being reached, I measured the time it would take to gzip a file when other VMs were running nothing and when other VMs were running CPU intensive operations. I expected the time to gzip the file would be the same because this VM gets priority for some processing. Unfortunately, the time taken to gzip the file when other VMs were running something was significantly more than when other VMs were not running anything. I tried setting the Hyperthreaded Core Sharing mode to Internal hoping that this would mean that my VM would get at least an entire core to itself. This did not work either. Thanks in advance!

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• Triple-Boot + 4 partition Limit

  - by dsimcha

  I just bought a new hard drive so that I could convert my XP-only machine into an XP-Ubuntu-Windows 7 triple boot machine. Since the drive is absurdly huge (1 TB) I wouldn't mind throwing ReactOS into the mix, too. I just found out that master boot records are limited to 4 entries, meaning 4 primary partitions. I had Windows XP set up on my old drive as a boot partition, a program files partition and a media partition. Since I really didn't want to install XP from scratch, I cloned this setup on my new drive. This leaves me one MBR partition entry for installing Windows 7, Ubuntu and ReactOS. I'd like to avoid having to install XP from scratch like the plague, partly because it's supposed to be a safety net in case things go wrong with my other OS's and because I've invested a lot of time getting it set up exactly the way I like it. Here are the options I've considered and why I don't like them: Install Windows 7 on my media partition. This would work, but I prefer to keep my media partition completely separate from any OS, so that I can reformat an OS partition without affecting my media partition at all. Use wubi or something to install Ubuntu in the same partition as something else. Again, this is brittle. Move all my media to a logical drive on an extended partition. Create another logical drive on this extended partition for Ubuntu. The problem here is that extended partitions are rather brittle--if you nuke one, it renders the rest useless. Just put the old drive back in my computer and run XP off it. Use the new one for the other OS's. The problem here is that the old drive is slower and uses extra power, generates extra heat, etc. Can anyone suggest any other possibilities that I may have overlooked?

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• Dell laptop keyboard doesn't work

  - by Tam

  I'm trying to fix my in-laws laptop, it's a Dell Studio 1745 that's running Windows 7 64 bit. The problem is that most of the keys on the keyboard do not work. The function keys work and the caps lock and numpad keys work, but no other keys do. If I hit the F2 key enough times when starting up, I can get to the BIOS, but after that even the function keys stop working. If I let it go all the way to the Windows login screen, I can see that the caps lock and num lock work - little images on screen actually appear, but they don't toggle the state of the key, i.e.,capslock is always off, numlock is always off. Using the fn+function combo works, so changing the brightness, etc. works fine. I'm stumped. I've tried disconnecting power and battery and leaving it for an hour or so before starting up but that hasn't helped either. Also - this might be a red herring - the touchpad is failing as well, the MS Device Manager says that it's failing with status 10, "unable to start device"

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• Software raid 0 with six disks performance

  - by user134880

  I have some problems with disk performance. I have 6 x WD 500Gb RE4 disks. Each disk gives 135Mb/sec throughput. All measurements are made with hdparm with options "-tT" (I know that it is just synthetic test, but I need some start point to make measurements). I have controller with Sil3124 x 4 ports PCI Express 1x So... RAID0 on controller with 2 disks gives 200Mb/s - ok, pcie limit. RAID0 on motherboard with 2 disks gives 270Mb/s - niceeee :) RAID0 on contorller with 4 disks gives 200Mb/s - ok, pcie limit. RAID0 on controller with 4 disks + 1 disks on motherboard = 340Mb/s ... :( RAID0 on controller with 4 disks + 2 disks on motherboard = 300Mb/s .... why? Any ideas? Maybe need more cpu power? Now there is Pentium D Dual core 2.8Ghz, 4Gb RAM. It is dedicated box for storage.. no other activity.

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• Proper approach to debug PC startup problems (POST)

  - by saurabhj

  My CPU was heating up to around 65 deg C and last time this had happened (about a year ago), I got thermal paste put between the CPU and heat sink and this managed to get it down to about 45 - 50 degrees. This time, I got some thermal paste and put it myself. However, my PC is not showing the POST display and not starting up. This is what happens LEDs light up HDDs spin Mouse is getting power All fans including the processor fan starts No display on monitor No diagnostic beep sounds (no sounds at all) What I have tried Removing everything including RAM, HDD, PCI cards, AGP card Boot up machine No changes from first state. What steps can I take to figure out where the problem lies? Note (might be important) When I removed the heat sink, the processor came out with it (it was stuck to it inspite of the processor latch on) Had to pry it separate with a screw-driver. Configuration Pentium 4, 2.8 Ghz with HT (very old, I know) Original Intel Mobo with onboard sound and graphics (GB series) 2x512 Mb DDR-RAM 2 SATA disks (320 Gigs / 250 gigs) DVD Writer Creative Sound Card Network card Any help would be appreciated. Thanks!

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• Accessing a webpage folder with .htaccess in it via apache webdav?

  - by pingo

  I have setup webdav access in order to enable an external user to upload the content of his web page to his folder on my server that is served by apache to the web. This way he could update his web page via webdav. Now the problem is that the user requires a .htaccess file and of course .htaccess breaks webdav probably because it overrides settings. (new files cannot be uploaded anymore via webdav if below specified .htaccess exists) I am running Apache2.2.17 and this is my webdav config: Alias /folderDAV "d:/wamp/www/somewebsite/" <Location /folderDAV> Order Allow,Deny Allow from all Dav On AuthType Digest AuthName DAV-upload AuthUserFile "D:/wamp/passtore/user.passwd" AuthDigestProvider file require valid-user </Location> This config is part of my naive solution to fixing this problem. The idea was to specify an alias to the web page folder where webdav would be enabled and then set AllowOverride to none so that the .htaccess would have no effect. Of course I then found out that in <Location /> AllowOverride directive is not valid. The .htaccess file looks like this: #opencart settings Options +FollowSymlinks Options -Indexes <FilesMatch "\.(tpl|ini)"> Order deny,allow Deny from all </FilesMatch> RewriteEngine On RewriteBase / RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule ^(.*)\?*$ index.php?_route_=$1 [L,QSA] ErrorDocument 403 /403.html deny from 1.1.1.1/19 allow from 2.2.2.2 What would be the solution here? I would like to have the web page accessible from the web but at the same time be able to access and modify it via apache's webdav (with digest auth). How would I do that? Also if possible I would like a solution that permits the existence of the .htaccess so that the user still has the power to setup access rules for his web page.

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• Chrome Lockups Windows 7 64-bit

  - by Mike Chess

  I'm running Google Chrome (6.0.427.0 dev) on Windows 7 Home Premium 64-bit (AMD Phenom 3.00 GHz, 8 GB RAM). The computer lockups hard after running Chrome for about five minutes. The lockup happens whether Chrome is actually being used to browse web sites or it is just idling. No programs can be started or interacted with when this happens. The computer must be power-cycled to recover. The lockup happens regardless of which web sites are being browsed. The system event logs do not show any events around the time when the lockup transpired. All other applications run just fine on this system. In fact, Chrome ran without issue for several months on this system (the system was brand new 03-2010). I also run the same version of Chrome on other computers (Windows XP SP3) without issue. I've come to really like Chrome and use it as my default browser whenever possible. What could be causing Chrome to cause the system to lockup as it does? Does Chrome have any logs that aren't part of the Windows event log? Does Chrome have a debug command line switch that might reveal more about what happens?

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• Win7 Hangs During App Install/Upgrade/Uninstall

  - by JadeMason

  I have a custom built PC that intermittently hangs when installing, uninstalling, or upgrading applications. Technical Specs ASUS P5E w/ WiFi Motherboard Intel Core2 Quad Q6600 Processor 4x 2GB G.Skill DDR2 800 SDRAM ASUS EAH2900XT / Radeon HD 2900XT 512MB Video Card Under normal operation the machine runs reliably, even under heavy load, such as video transcoding. The temperature never gets anywhere near where I would worry about it. However, the machine regularly hangs (complete lockup, no response to keyboard or mouse, no activity on-screen) when either installing a new application, uninstalling an existing application, or applying patches to existing applications or the OS. This is extremely frustrating as this machine is primarily used as a HTPC. Several apps are configured for automatic updates, and these updates sometimes cause the machine to lockup while we are watching content on the PC. In previously investigating this issue, I found one likely problem could be my Logitech Webcam. The Logitech software has a bug that leaves an entry in HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\ Control\SessionManager\PendingFileRenameOperations Which references the Temp directory. My registry contained this error, so I uninstalled the webcam software and deleted this registry key value. Unfortunately, the machine will still intermittently hang. I've noticed that the hangs always happen when an install/upgrade/uninstall requires elevated privileges (presumably to modify the registry). I can typically get at least one install/upgrade/uninstall to complete after a reboot, but after that it is a game of russian roulette to see if the operation will succeed or hang the machine. The event log is not helpful, as log messages end at the time of the hang, with no record of a warning or error. My only recourse when the machine hangs in this way is to perform a hard reset/power cycle. Any tips on how to further debug this issue are greatly appreciated.

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• lenovo x1 carbon windows 8 frequent wifi disconnect issue

  - by hIpPy

  I'm having frequent wifi disconnects on my Lenovo X1 Carbon Touch laptop. I got this laptop 2 months back and it has been happening ever since about 3-5 times a day and 10 times a week on average. I've Frontier Fios internet. Power connected or not does not matter. Once I get disconnected, I try below to connect again in that order: turn Airplane mode on and off, troubleshoot network problems windows troubleshooter), restart the laptop I'd find that the WiFi adapter would get disabled and sometimes windows troubleshooting would help but more than often I'd end up restarting the laptop. A week back, I upgraded my wifi network adapter drivers (now Intel, version 15.5.6.48, 10/3/2012). I still get disconnected frequently but turning Airplane mode on and off gets me connected again. So the driver update did help. Windows 8 is updated. None of the other devices (nexus, iphone phones, nexus7, ipad tablets) would have wifi issues when my laptop would get disconnected. config: Intel(R) Centrino(R) Advanced-N 6205 (WiFi network adapter) Microsoft Windows 8 Pro Microsoft Windows [Version 6.2.9200] x64-based PC LENOVO System Model: 3443CTO X1 Carbon Touch I recently noticed this log message When I got disconnected in event viewer: Your computer was not assigned an address from the network (by the DHCP Server) for the Network Card with network address 0x[XXXXXXXXXXXX]. The following error occurred: 0x79. Your computer will continue to try and obtain an address on its own from the network address (DHCP) server. Any idea?

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• What is the solution to enable Dymo Turbo 400 Label Printer to work on Win 7 / 64-bit?

  - by mdpc

  It's Christmas time and time for printing labels for all those Christmas cards. I've upgraded to Windows 7 64-bit from XP. I've been unsuccessfully attempting to get the connected Dymo 400 Turbo label USB printer to work again. The latest manufacturer drivers have been successfully loaded and installed. The drivers are supposed to work on Windows 7/64-bit. The Win 7 system(s) in question are patched and up-to-date on that score. The Windows Update site responds with a driver when the USB cable is connected to this printer. The printer queue seems to be established correctly. What happens is that I submit a job to the printer (either using the DYMO s/w or not), it delays for a period of time, and then I get the message 'printing error'. Can't seem to locate the appropriate error in the new and improved event log. Several combinations of rebooting, re-installation and power cycling components fail to make the printer work. Sometimes during some type of reset it spits out the last thing to be submitted, but that seems intermittent. I have tried different USB cables and different USB (2.X) ports as well. I have run the Windows 7 troubleshooter it tries to fix the problem but alas it doesn't. Interestingly, trying the USB printer (and its associated manufacturer drivers and s/w) on another Windows 7 64-bit system has the identical failures noticed on the original system. I did not find anything on the manufacturers' site concerning this problem. The printer has no hardware problems or issues.

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• Apache using 100% CPU, once again

  - by CBenni

  Recently, apache2 started using 100% of CPU power: top gives me From other, similar threads, I took the tip to use mod_status. Aside from HUGE amounts of NULL requests, it gives: CPU Usage: u2.16 s1.32 cu0 cs0 - .0835% CPU load 1.2 requests/sec - 17.6 kB/second - 14.6 kB/request 8 requests currently being processed, 42 idle workers The access and error logs do not show anything surprising or intriguing at all. Note the .8% CPU usage. Another tip was to use strace: root@server:~# strace -p 1956 Process 1956 attached - interrupt to quit restart_syscall(<... resuming interrupted call ...> And remains like this for at least half an hour, without producing any additional output. Restarting apache fixed the problem for less than a second The server runs a few custom python scripts aswell as a django-powered website on apache2 (up-to-date), but even turning the scripts off (or not having them active in the first place) did not change anything. After I stopped apache and powered my server off, powered it on a few minutes afterwards and restarted all my services, the CPU usage remained low for several hours, just in order to pop up again randomly (?) The DigitalOcean CPU stats on my server are: You can see how the CPU usage was super high for almost half a day until I restarted the bot - just to remain stable for several hours and then pop up again. I am completely at a loss of words and don't know what I could do to find out what piece of my code is giving me these problems or if apache itself is the cause... Therefore I would greatly appreciate any hints to the questions: What else can I try to do? Which things might I not have checked? Is this definitely in my own code? How do you find what part of python code crashes an app via a infinite loop or similar?

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• PC in POST loop

  - by Antony Scott

  Hi, I have a custom built PC using a Gigabyte GA-EP35-DS3P motherboard with a Q6600 CPU. For the last 2 days it has got itself stuck into a POST loop. Saying that, I don't think it actually got in to the BIOS. It repeatedly lit up the LEDs and then not much more. Sometimes I could see the CPU fan twitch. Today I re-seated the DIMMs and it powered up straight away. Could this be a sign of an impending hardware failure? The PC is hooked up to a UPS, so I don't think it's a power spike or anything like that, as I have 2 other PCs on the same UPS and they're both fine. Yesterday, the first time this happened, I was getting a message which I think said "Scanning BIOS image on hard drive". I've been building and using PCs for well over 25 years and that's a new one on me! I don't think it's an over heating problem, as when the PC does finally boot up the CPU is running at 35-40C. Any help or suggestions would be greatly appreciated.

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• Servers - Buying New vs Buying Second-hand

  - by Django Reinhardt

  We're currently in the process of adding additional servers to our website. We have a pretty simple topology planned: A Firewall/Router Server infront of a Web Application Server and Database Server. Here's a simple (and technically incorrect) diagram that I used in a previous question to illustrate what I mean: We're now wondering about the specs of our two new machines (the Web App and Firewall servers) and whether we can get away with buying a couple of old servers. (Note: Both machines will be running Windows Server 2008 R2.) We're not too concerned about our Firewall/Router server as we're pretty sure it won't be taxed too heavily, but we are interested in our Web App server. I realise that answering this type of question is really difficult without a ton of specifics on users, bandwidth, concurrent sessions, etc, etc., so I just want to focus on the general wisdom on buying old versus new. I had originally specced a new Dell PowerEdge R300 (1U Rack) for our company. In short, because we're going to be caching as much data as possible, I focussed on Processor Speed and Memory: Quad-Core Intel Xeon X3323 2.5Ghz (2x3M Cache) 1333Mhz FSB 16GB DDR2 667Mhz But when I was looking for a cheap second-hand machine for our Firewall/Router, I came across several machines that made our engineer ask a very reasonable question: If we stuck a boat load of RAM in this thing, wouldn't it do for the Web App Server and save us a ton of money in the process? For example, what about a second-hand machine with the following specs: 2x Dual-Core AMD Opteron 2218 2.6Ghz (2MB Cache) 1000Mhz HT 16GB DDR2 667Mhz Would it really be comparable with the more expensive (new) server above? Our engineer postulated that the reason companies upgrade their servers to newer processors is often because they want to reduce their power costs, and that a 2.6Ghz processor was still a 2.6Ghz processor, no matter when it was made. Benchmarks on various sites don't really support this theory, but I was wondering what server admin thought. Thanks for any advice.

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