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• LM Sensors always returning same (invalid) value for one temp sensor

  - by pkaeding

  I am trying to monitor the temp sensors on a server, and plot them using Cacti. I have lm-sensors installed and working correctly. For example, here is the output from sensors: % sensors acpitz-virtual-0 Adapter: Virtual device temp1: +26.8 C (crit = +100.0 C) temp2: +32.0 C (crit = +60.0 C) coretemp-isa-0000 Adapter: ISA adapter Core 0: +36.0 C (high = +105.0 C, crit = +105.0 C) coretemp-isa-0001 Adapter: ISA adapter Core 1: +42.0 C (high = +105.0 C, crit = +105.0 C) However, when I try to get this data via SNMP, I get only one sensor's temperature correctly, and another one always returns 100.000 C: % snmpwalk -Os -c public -v 1 10.8.0.18 -m ALL lmTempSensors lmTempSensorsIndex.1 = INTEGER: 0 lmTempSensorsIndex.2 = INTEGER: 1 lmTempSensorsDevice.1 = STRING: temp1 lmTempSensorsDevice.2 = STRING: temp1 lmTempSensorsValue.1 = Gauge32: 26800 lmTempSensorsValue.2 = Gauge32: 100000 So, my question is two-fold: Why is the second sensor that is returned by SNMP giving a value of 100 C (when it should be 32 C) Why are my CPU core sensors not being returned by SNMP?

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• Proper 16:9 video size for non-HD 4:3 video (for youtube/vimeo)

  - by Xeoncross

  Since High Definition video came out on all the online sites it has changed the default aspect ratio of the player from 4:3 to 16:9. This means that for people posting SD video you have to resize some of your videos to get them to fit right. For example, NTSC DVD quality (aka 480i/p) is 720x480 pixels (width x height). However, low-end High Definition (720i/p) is 1280x720. Anyway, now that the video players are built for HD you will find that uploading standard quality videos will result in videos that are "letter boxed" which means they have extra black bars on the top and bottom (or sides). Correct me if I'm wrong, but in order to get a 720x480 video to fit a box that is designed for HD the best practice would be to crop some of it off so that it fits as 720x404 since: 16/9 = 1.78 (1.7777777777778) 720/405 = 1.78 405x1.78 = 720.9 The same would stand for 640x480 (old TV quality) video that would need to be 640x360 correct? I'm asking because I'm not sure about all this and whether this is the proper way to fix these letter-boxing/display problems.

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• NFS or GFS for LVS 10 Server Setup

  - by Michael Robinson

  Currently we have a 10 servers LVS hosting setup. The people we hired to set it up did not anything about GFS which was our preferred Central Storage File System Solution. As we have tight time constraint, we just told them to use whatever they were familiar with which is NFS. I have since done some research and it seems that NFS is not ideal for the type of high traffic site we are hoping to build. I couldn't find much info online about the signaficance differences between the 2. As we to setup all servers again right now, should we stick with NFS or find someone who knows how to setup GFS amd go with that. We need a setup that is highly reliable and scalable as we intend. As after initial setup is done, we expect high increases in traffic and load.

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• laptop overheating ran defraggler and now its not as hot

  - by Marko

  Trying to diagnose and fix an overheating Acer 5735 laptop, running speedfan and doing general workload to try and cause the overheat conditions. I notice that windows xp is badly fragmented according to defraggler, at 58% fragmentation. So I defrag whilst watching the speedfan window, which was at the start reporting high warning style symbols for all of the sensors. After the defrag, I rebooted and ran a few programs, and even defraggler again and the sensors in speedfan all reported green i.e. not high. Wondering if there is a correlation between windows fragmentation causing the hard drive to work harder and produce more heat inside the laptop? dont want to just assume that the problems are resolved, so either speedfan is not accurate enough or fragmentation can lead to additional hard drive heat? All comments or suggestions welcome.

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• Correlating %RDY in esxtop to CPU Usage in Guest

  - by Joe

  We recently upgrade a number of our VmWare hosts from 4.1 to 5.5 and noticed many of the VMs saw a step-wise jump in CPU usage as shown by the guest VM. We have not yet upgraded vmwaretools on any of the guests, but after investigating a bit more we saw many of these guests with a high %RDY value (50%) when viewed under esxtop. Unfortunately Linux (the guest) just shows "high CPU usage" without any insight into what portion of that is coming from %RDY (VmWare saying, "your guest is waiting on CPU from the host"). Are there any tools, /proc entries, etc. that can shed light on that information?

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• DB2 LUW tools for diagnosing issues when the stuff hits the fan

  - by Ichorus

  I am no DBA and very much a novice when it comes to DB2 so even 'obvious' answers are welcome to this question: I love db2top but sometimes I cannot get it to run if the load average is high on a db2 LUW. This morning I was looking at an issue where load average shot up suddenly, I could not get db2top to come up and I needed to find out what was happening. What can I do to find out who is doing what in this situation? I suspected a horribly bad query was being run by someone...is there a good way to find information on poor performing SQL on the fly in that type of situation? Are there any good ways to collect good, actionable stats who/where bad sql is coming from in the event that load average is so high? I know about db2pd but I am not sure how to use it effectively and slogging through tens of thousands of lines of raw data is probably not the most efficient way to get at the heart of a problem. Any tips or resources?

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• monitoring TCP/IP performance on Solaris

  - by Andy Faibishenko

  I am trying to tune a high message traffic system running on Solaris. The architecture is a large number (600) of clients which connect via TCP to a big Solaris server and then send/receive relatively small messages (.5 to 1K payload) at high rates. The goal is to minimize the latency of each message processed. I suspect that the TCP stack of the server is getting overwhelmed by all the traffic. What are some commands/metrics that I can use to confirm this, and in case this is true, what is the best way to alleviate this bottleneck?

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• PCI scan findings and problems with week ciphers on ports 993,443,995,465

  - by user64991

  From PCI scan results: Synops is : The remote service encrypts traffic using a protocol with known weaknesses . Description : The remote service accepts connections encrypted using SSL 2.0, which reportedly suffers from several cryptographic flaws and has been deprecated for several years. An attacker may be able to exploit these issues to conduct man-in-the-middle attacks or decrypt communications between the affected service and clients . See also : http://www.schneier.com/paper-ssl.pdf Solution: Consult the application's documentation to disable SSL 2.0 and use SSL 3.0 or TLS 1.0 instead. Risk Factor: Medium / CVSS Base Score : 2 (AV:R/AC:L/Au:NR/C:P/A:N/I:N/B:N) I have tried to change SSLProtocol all -SSLv2 to SSLProtocol -ALL +SSLv3 +TLSv1 And SSLCipherSuite ALL:!ADH:!EXPORT:!SSLv2:RC4+RSA:+HIGH:+MEDIUM:+LOW To SSLCipherSuite ALL:!ADH:RC4+RSA:+HIGH:!MEDIUM:!LOW:!SSLv2:!EXPORT But using SSLdigger, it shows the same result. Is this the right way to do something like this?

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• Which keyboard has better ergomics?

  - by Absolute0

  When I was a kid I fell hard on my right wrist and since then I always get wrist pains when angling my wrist very high up (ie: when using a very high shaped mouse or doing push ups). So I have narrowed down my choices for a keyboard to the following 2: Microsoft Natural 4000: And the Razer Arctosa: The Razer is a slim type keyboard similar to a laptop feel and the hand-rest would help with keeping my hands straight with respect to my forearms. I am more inclined on getting the razer but am not sure if this will benefit my wrists in the long run. Any thoughts on this would be greatly appreciated. Thanks.

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• CPU load, USB connection vs. NIC

  - by T.J. Crowder

  In general, and understanding the answer may vary by manufacturer and model (and driver, and...), in consumer-grade workstations with integrated NICs, does the NIC rely on the CPU for a lot of help (as is typically the case with a USB controller, for instance), or is it fairly intelligent and capable on its own (like, say, the typical Firewire controller)? Or is the question too general to answer? (If it matters, you can assume Linux.) Background: I'm looking at connecting a device (digital television capture) that will be delivering ~20-50 Mbit/sec of data to a somewhat under-powered workstation. I can get a USB 2 High-speed device, or a network-attached device, and am interested in avoiding impacting the CPU where possible. Obviously, if it's a 100Mbit NIC, that's roughly half its theoretical inbound bandwidth, whereas it's only roughly a tenth of the 480 Mbit/second the USB 2 "High Speed" interface. But if the latter requires a lot of CPU support and the former doesn't...

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• Can you recommend a robust OpenAPI 2.0 provider?

  - by larsks

  Help me find a robust OpenID 2.0 provider! We're looking at various SSO solutions for our organization, and I would like to suggest OpenID as a viable option, since (a) there is good consumer support in a number of web applications, and (b) it's simpler to implement than Shibboleth, which is the alternative technology. However, this requires that we find a robust OpenID provider, ideally one meeting the 2.0 specification. The only solutions I've come across so far are: Atlassian Crowd This looks great, although the $4000 price tag may make it a tough sell. Community-ID This looks like an interesting idea, but I'm not sure the project quality is at a suitable level (yet). In particular, it's not clear if LDAP support actually works (which will be a requirement in our environment). Have you implemented OpenID in your environment? What are you using? Have you selected an alternative SSO technology?

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• Linux stretch cluster: MD replication, DRBD or Veritas?

  - by PieterB

  For the moment there's a lot of choices for setting up a Linux cluster. For cluster manager: you can use Red Hat Cluster manager, Pacemaker or Veritas Cluster Server. The first one has the most momentum, the second one comes by default with RH subscriptions and the last one is very expensive and has a very good reputation ;-) For storage: - You can replicate LUN's using software raid / md device - You can use the network using DRBD replication, which offers a bit more flexibility - You can use Veritas Storage Foundation technology to talk to your SANs replication technology. Anyone has any recommandations or experience with these technologies?

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• Windows Server 2008 Scheduled Tasks not running - 0x80041323 - Reduce Number of tasks running in the specified context?

  - by Mayb2Moro

  I am getting the following problem on a number of windows 2008 servers. 0x80041323 Task Scheduler failed to start task \Reporting" in TaskEngine "S-1-5-18:NT AUTHORITY\System:Service:" for user "NT AUTHORITY\System". User Action: Reduce the number of tasks running in the specified user context. I've done lots of research around the web but have been unable to come up with a working answer. I have found some information suggesting increasing a value in the registry key "TasksInMemoryQueue" which I have done, but even setting this as high as 500 has not helped. I have rebooted the server after setting this value. The server does run a high volume of Scheduled tasks, there could be 150 or so running at any one time, but certainly not 500. The scheduled tasks are all running under the system user. Does anyone have any ideas?

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• eAccelerator ignore my new setting?

  - by Mwebe Nkrumah

  Hi, Im using eAccelerator 0.9.5.2, CentOS 5.3, lighttpd 1.4.22 But because eAccelerator is cached in RAM, I needs too much RAM. So Im trying to cache in hard disk. (my website is not generate money, so Im thinking about cheaper solution) So, I modify /etc/php.d/eaccelerator.ini with below codes: extension="eaccelerator.so" eaccelerator.shm_size="12" eaccelerator.cache_dir="/var/cache/eaccelerator" eaccelerator.enable="1" eaccelerator.optimizer="1" eaccelerator.check_mtime="0" eaccelerator.debug="0" eaccelerator.filter="" eaccelerator.shm_max="20M" eaccelerator.shm_ttl="1800" eaccelerator.shm_prune_period="0" eaccelerator.shm_only="0" eaccelerator.compress="0" eaccelerator.compress_level="9" eaccelerator.keys="disk_only" eaccelerator.sessions="disk_only" eaccelerator.content="disk_only" So, the output of phpinfo() as below: http://img175.imageshack.us/img175/1104/screenshggot.png But after using "disk_only" in eAccelerator and restart lighttpd & php-cgi using killall, my RAM usage is still high for php-cgi. Reboot the server also not works. The data is created in cache directory, but RAM usage is still high.

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• How to remove blank lines in .txt file

  - by Brant

  I want to change text file format as following , but don't know how to do (2) 5. The function of the condenser is to: a) vapourise the liquid refrigerant b) change high pressure refrigerant vapour to liquid c) pressurise low pressure refrigerant vapour d) vent off vapourised refrigerant e) lower the liquid refrigerant pressure (2) 6. One tonne of refrigeration is: a) 13958 kJ per day b) 100 kJ per minute c) 233 kJ per minute d) 13958 J per hour e) 335 J per second (2) 5. The function of the condenser is to: a) vapourise the liquid refrigerant b) change high pressure refrigerant vapour to liquid c) pressurise low pressure refrigerant vapour d) vent off vapourised refrigerant e) lower the liquid refrigerant pressure (2) 6. One tonne of refrigeration is: a) 13958 kJ per day b) 100 kJ per minute c) 233 kJ per minute d) 13958 J per hour e) 335 J per second

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• Linux stretch cluster: MD replication, DRBD or Veritas?

  - by PieterB

  For the moment there's a lot of choices for setting up a Linux cluster. For cluster manager: you can use Red Hat Cluster manager, Pacemaker or Veritas Cluster Server. The first one has the most momentum, the second one comes by default with RH subscriptions and the last one is very expensive and has a very good reputation ;-) For storage: - You can replicate LUN's using software raid / md device - You can use the network using DRBD replication, which offers a bit more flexibility - You can use Veritas Storage Foundation technology to talk to your SANs replication technology. Anyone has any recommandations or experience with these technologies?

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• Bacula vs. BackupPC [closed]

  - by ujjain

  I have been googling about the differences between them. Bacula has lots of roles BackupPC is easier to configure Bacula works with agent, not rsync (great for Windows backups) It seems that Bacula is most often compared to Amanda though, while BackupPC seems a perfectly lovely and popular backup distribution to. I currently backup my servers with rsnapshot, but I am looking for a professional scalable solution that could also back-up 50 hosts without problems. Preferably a solution that can offer bare metal restores for my Linux servers. I am not looking to reinstall the exact same version of Plesk, the software, etc... Update: I see this ranks high in Google, I found a good article: http://www.serverfocus.org/backuppc-vs-bacula-vs-amanda. I personally think that BackupPC is good for smaller environment, but Bacula, despite the high learning curve, is better for environments that requilre scaling.

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• SharePoint Designer prompts for credentials when edited from IE8

  - by Rob Nicholson

  Our intranet is hosted using the free SharePoint services on Windows 2003. Consider the following page: http://vserver003/help/technology/multimedia/multimedia.htm On selecting "Edit with Microsoft Office SharePoint Designer" from IE8, SPD launches, opens the website and then the selected page - all is well. In order to make moving the intranet easier, we've set-up a DNS setting called intranet.company.local so you can also access the intranet that way: http://intranet.company.local/help/technology/multimedia/multimedia.htm However, when you edit this page, SPD designer prompts you for credential, i.e. domain\username and password. If you enter the details it opens fine. If you don't enter the details, the page still opens but not the website. Any ideas have to get around this prompt? Haven't a clue where to start looking. Thanks, Rob. PS. The same prompt occurs if you use the physical IP address.

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• Latency, Ping and Other Questions

  - by Paulo Cassiano

  In a high traffic application, like an online auction system, few ms could determine 'to win or 'to lose' the 'battle'. I'm from Brazil. Here, I 'ping' local sites - like UOL - and receive replies in ~ 11ms. When I 'ping' US sites - like RackSpace - I receive replies in ~ 130 ms! The point is: I need a (very good like RackSpace [1]) infra-structure to host my killer online auction application, but there's no (RackSpace like) options in Brazil... Assuming that all users are located here, in Brazil, is it 'sine qua non' condition to host my application here, in Brazil? I think ~130 ms is a very high latency but, all users will receive this reply, sure? Well, where should I host my application? [1] Feel free to point me to any other very good host option other than RackSpace. I've cited it because I only know these guys...

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• In what way does non-"full n-key rollover" hinder fast typists?

  - by Michael Kjörling

  Wikipedia claims (although the latter claim does not cite a source) that: High-end keyboards that provide full n-key rollover typically do so via a PS/2 interface as the USB mode most often used by operating systems has a maximum of only six keys plus modifiers that can be pressed at the same time.[4] This hinders fast typists, ... In what way would the system being able to recognize only six non-modifier keys at once hinder a fast typist? I consider myself a relatively fast typist and I usually press one key, plus modifiers, at once; I can't imagine any real-life situation in which the system only recognizing six non-modifier keys being pressed at once has been a limiting factor in my keyboard usage. (Multi-stroke keyboard shortcuts as used by high-end software like Visual Studio, Emacs and the like are a different matter.) Note that I am not really interested in answers centered around multiplayer computer games; I'm looking for answers that give reasons that would be relevant to typists, somehow supporting the statement made on Wikipedia.

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• Dock displays low-resolution icons

  - by squircle

  Recently, I've noticed that the dock has been starting to display low-resolution icons in place of the former high-resolution icons for common apps like Stickies, Word, iTunes and Preview. Looking at the .icns file within each program, all copies of the icon are present within the file (high and low resolutions), but the dock refuses to display them, leaving some programs looking like this: Restarting doesn't stop this behaviour, nor does a killall Dock, nor removing the icon and replacing it in the dock. In Finder, the icons display normally. Does anybody know what may be causing this issue? Thanks!

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• How can I take browser screenshots at a higher resolution than my browser supports?

  - by Joshua Carmody

  I need to take a screenshot of a website as it would appear on a very high resolution monitor... say 4000x3000 pixels. My laptop's screen has a native resolution of 1400x768. Basically, I need to simulate having a monitor resolution much higher than my monitor and video card actually supports. I want the screenshot of the site to look pretty much how it does when you hit CTRL MINUS (zoom out) in Firefox repeatedly, but without any loss of pixels due to scaling. How can I do this? Is there some way to use virtual machine software to simulate a super-high-res display? If not, is there some way to open a browser window bigger than the screen, and then capture its contents as a PNG somehow? Anything else that might work?

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• Samsung syncmaster SA300

  - by lee

  I recently bought the above moniter. i am now using the DVI port in the moniter but the picture quality stil seems average like the same when i was using the VGA port. THere hasnt been a noticeable change. I am using the DVI output from my graphics card but i thought the picture quality should be alot more High Def than what it is. im just really disappointed in the out come as was expecting nearly High Def quality from my new moniter but just seems a bit normal. Could i need to change any settings?

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• How do you enable multi-core virtualization in Windows 8 Pro?

  - by Greg B

  I've just got a new Dell Vostro 470 with a quad core (8 threads) i7 3770 and I'm trying to run virtual machines on it, which works fine, except if I want to assign multiple cores to a VM. I've checked the bios which states Intel Virtualization Technology [Enabled], but both Hyper-V and VirtualBox will only allow me to assign a single core. If I run the Intel Processor Identification Utility on the host OS it tells me that Intel Virtualization Technology isn't supported by the processor, but according to the Intel website, it is. So whats going on? Have Dell clipped the i7's wings? Is there some config in Windows I need to change?

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• Why is my connection to Playstation Network so unreliable? [closed]

  - by jammus

  Hello friends. I'm 28 and my girlfriend is 24. Our home internet connection is pretty reliable, it's almost always up and can get fairly high download speeds. However, my experience with the Playstation Network is pretty frustrating. I'm always getting kicked off or getting quite high latency. Are there any tips or tricks that you might help my on-line gaming run more smoothly? I'm using a wireless connection for the PS3, is this likely to affect things?

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