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• mysql query building output taking a long time

  - by user121196

  I have a simple query that does select * from t limit 1; on a remote mysql server. I use squirrel(mysql client) to run it, it shows: Query 1 of 1 elapsed time (seconds) - Total: 22.047, SQL query: 1.047, Building output: 21 why does building output take such a long time? what does this process do? when running from mysql command line, the whole process takes 0.3 secs (also remotely)

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• Building vs. Compiling (Java)

  - by sixtyfootersdude

  Thinking that the answer to this is pretty obvious but here it goes: When I am working on a small project for school (in java) I "compile" it. On my coop we are using ant to "build" our project. I think that compiling is a subset of building. Is this correct? What is the difference between building and compiling?

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• GoogleMaps API extracting building shape information.

  - by manionml

  Hi, I'm looking for a way to extract building shape (polygon) information from google maps automatically. It appears that you can only downloaded information relating to shapes you've created yourself. Example here. Information relating to building shape and height is stored by google, so I'm hoping there's a way to extract it.

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• Problems building nodejs on MacOS Snow Leopard

  - by mrwooster

  I am having trouble building nodejs on MacOS Snow Leopard. I think it might have something to do with my PATH variable not being set correctly for the developer tools location. For some reason, the Developer tools (gcc, g++, make etc) are all stored in /Developer/usr/bin I added it to my PATH variable as follows: $ export PATH=$PATH:/Developer/usr/bin $ echo $PATH /opt/local/bin:/opt/local/sbin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/local/git/bin:/usr/X11/bin:/Developer/usr/bin When i try to configure it complains about not finding open-ssl, ok, not a big problem. So I try with --without-ssl : $ ./configure --without-ssl Checking for program g++ or c++ : /Developer/usr/bin/g++ Checking for program cpp : /Developer/usr/bin/cpp Checking for program ar : /usr/bin/ar Checking for program ranlib : /Developer/usr/bin/ranlib Checking for g++ : ok Checking for program gcc or cc : /Developer/usr/bin/gcc Checking for gcc : ok Checking for library dl : yes Checking for library util : yes Checking for library rt : not found --- libeio --- Checking for library pthread : yes Checking for function pthread_create : not found /Users/Guy/git_src/node/node/deps/libeio/wscript:13: error: the configuration failed (see '/Users/Guy/git_src/node/node/build/config.log') Anyone know how I can get round this? I am suspicious that it might be something to do with the PATH or another ENV variable, but not sure. Thanks G

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• samba4 not building in archlinux.

  - by kmplsv

  cp bin/tdbtool bin/tdbdump bin/tdbbackup /tmp/yaourt-tmp-root/aur-samba4/pkg//opt/samba4/samba/bin cp ./include/tdb.h /tmp/yaourt-tmp-root/aur-samba4/pkg//opt/samba4/samba/include cp tdb.pc /tmp/yaourt-tmp-root/aur-samba4/pkg//opt/samba4/samba/lib/pkgconfig cp libtdb.a libtdb.so.1.2.4 /tmp/yaourt-tmp-root/aur-samba4/pkg//opt/samba4/samba/lib rm -f /tmp/yaourt-tmp-root/aur-samba4/pkg//opt/samba4/samba/lib/libtdb.so ln -s libtdb.so.1.2.4 /tmp/yaourt-tmp-root/aur-samba4/pkg//opt/samba4/samba/lib/libtdb.so rm -f /tmp/yaourt-tmp-root/aur-samba4/pkg//opt/samba4/samba/lib/libtdb.so.1 ln -s libtdb.so.1.2.4 /tmp/yaourt-tmp-root/aur-samba4/pkg//opt/samba4/samba/lib/libtdb.so.1 mkdir -p /tmp/yaourt-tmp-root/aur-samba4/pkg/`/tmp/yaourt-tmp-root/aur-samba4/src/bin/python -c "import distutils.sysconfig; print distutils.sysconfig.get_python_lib(1, prefix='/opt/samba4/samba')"` cp tdb.so /tmp/yaourt-tmp-root/aur-samba4/pkg/`/tmp/yaourt-tmp-root/aur-samba4/src/bin/python -c "import distutils.sysconfig; print distutils.sysconfig.get_python_lib(1, prefix='/opt/samba4/samba')"` /bin/install -c -d /tmp/yaourt-tmp-root/aur-samba4/pkg//opt/samba4/samba/share/man/man8 for I in manpages/*.8; do \ /bin/install -c -m 644 $I /tmp/yaourt-tmp-root/aur-samba4/pkg//opt/samba4/samba/share/man/man8; \ done /bin/install: cannot stat `manpages/*.8': No such file or directory make: *** [installdocs] Error 1 Aborting... ==> ERROR: Makepkg was unable to build samba4. ==> Restart building samba4 ? [y/N] ==> ------------------------------- ==>c any ideas as what is causing my build to fail? i'm assuming it's an issue with manpages but i can't figure out exactly what package it is looking for that i don't have.

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• samba4 not building in Arch

  - by kmplsv

  cp bin/tdbtool bin/tdbdump bin/tdbbackup /tmp/yaourt-tmp-root/aur-samba4/pkg//opt/samba4/samba/bin cp ./include/tdb.h /tmp/yaourt-tmp-root/aur-samba4/pkg//opt/samba4/samba/include cp tdb.pc /tmp/yaourt-tmp-root/aur-samba4/pkg//opt/samba4/samba/lib/pkgconfig cp libtdb.a libtdb.so.1.2.4 /tmp/yaourt-tmp-root/aur-samba4/pkg//opt/samba4/samba/lib rm -f /tmp/yaourt-tmp-root/aur-samba4/pkg//opt/samba4/samba/lib/libtdb.so ln -s libtdb.so.1.2.4 /tmp/yaourt-tmp-root/aur-samba4/pkg//opt/samba4/samba/lib/libtdb.so rm -f /tmp/yaourt-tmp-root/aur-samba4/pkg//opt/samba4/samba/lib/libtdb.so.1 ln -s libtdb.so.1.2.4 /tmp/yaourt-tmp-root/aur-samba4/pkg//opt/samba4/samba/lib/libtdb.so.1 mkdir -p /tmp/yaourt-tmp-root/aur-samba4/pkg/`/tmp/yaourt-tmp-root/aur-samba4/src/bin/python -c "import distutils.sysconfig; print distutils.sysconfig.get_python_lib(1, prefix='/opt/samba4/samba')"` cp tdb.so /tmp/yaourt-tmp-root/aur-samba4/pkg/`/tmp/yaourt-tmp-root/aur-samba4/src/bin/python -c "import distutils.sysconfig; print distutils.sysconfig.get_python_lib(1, prefix='/opt/samba4/samba')"` /bin/install -c -d /tmp/yaourt-tmp-root/aur-samba4/pkg//opt/samba4/samba/share/man/man8 for I in manpages/*.8; do \ /bin/install -c -m 644 $I /tmp/yaourt-tmp-root/aur-samba4/pkg//opt/samba4/samba/share/man/man8; \ done /bin/install: cannot stat `manpages/*.8': No such file or directory make: *** [installdocs] Error 1 Aborting... ==> ERROR: Makepkg was unable to build samba4. ==> Restart building samba4 ? [y/N] ==> ------------------------------- ==>c Any ideas as what is causing my build to fail? I assume it's an issue with manpages I can't figure out exactly what package it is looking for that I don't have.

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• Walkthrough/guide building aplication server for multi tenant web app [on hold]

  - by Khalid Adisendjaja

  The web app will detect a subdomain such as tenant1.app.com, tenant2.app.com, etc to identify tenant environment, each tenant environment will have a different database credential (port,db name,etc) but still connecting to the same database server. Each tenant should use app.com for their main domain, using their own domain is prohibitted. Each tenant will have their own rest api endpoint such as tenant1.app.com/api/v1/xxxx, tenant2.app.com/api/v1/xxxx, tenant3.app.com/api/v1/xxxx I've come to a simple solution by setting a wildcard subdomain (*.app.com) on webserver Apache/Nginx vhost configuration file. I have googled so many concept for building a multi-tenant app server but still don't understand how to really done it, what is the right way to do it and what is actually required to do this task. So I've come to this questions, Do I need a proxy server, dns masking, etc.. How to monitor each tenants activity What about server performance, load balancing, and scalability How to setup ssl certificate for each tenant what about application cache for each tenant Is it reliable to use the setup for production etc ... I have a very litte experience on server infrastructure, so I'm looking for a DIY walkthrough, step by step guide, or sophisticate solution ready to implemented for production

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• Moving server room to another part of the building

  - by PHLiGHT

  This question is a bit different than the typical we are moving our server room to an off site location or we are moving the whole office to a new building. Management wants to add some more office space and to do so they want to move the server room to another location. The server room has Verizon smart jacks, a few servers, PBX and all the office network drops go into this room. I'm going to go over there to scout out an alternate location for the equipment because that is still TBD. This sounds like quite a pain since the Verizon equipment for our MPLS will need to be moved (never done that) and the office jacks will need to be re-run. How do you handle the jacks? I was thinking of keeping them in the same location and having new wall plates put in with half the ports going to the current location and the other half to the new location. Or do you think that 40 drops could just be done over the weekend so the old stuff would be ripped out and replaced with the new? Currently the wiring is a mess so this could be a blessing in the long run.

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• Locate devices within a building

  - by ams0

  The situation: Our company is spread between two floors in a building. Every employee has a laptop (macbook Air or MacbookPro) and an iPhone. We have static DHCP mappings and DNS resolution so every mobile gets a name like employeeiphone.example.com, every macbook air gets a employeelaptop.example.com and every macbook pro gets a employeelaptop.example.com on the Ethernet interface (the wifi gets a dynamic IP from a small range dedicated for the purpose). We know each and every MAC address of phones and laptops, since we do DHCP static mapping (ISC DHCP server runs on linux). At each floor we have a Netgear stack of two switches, connected via 10GB fiber to each other. No VLANs so far. At every floor there are 4 Airport Extreme making a single SSID network with WPA2 authentication. The request: Our CTO wants to know who is present at which floor. My solution (so far): Every switch contains an table listing MAC address and originating port. On each switch stack, all the MAC addresses coming from the other floor are listed as coming on port 48 (the fiber link). So I came up with: 1) Get the table from each switch via SNMP 2) Filter out the ones associated with port 48 3) Grep dhcpd.conf, removing all entries not *laptop and not *iphone 4) Match the two lists for each switch, output in JSON or XML 5) present the results on a dashboard for all to see I wrote it in bash with a lot of awk and sed, it kinda works but I always have for some reason stale entries in the switch lookup tables, making it unreliable; some people may have put their laptop to sleep, their iphones drop connections after a while, if not woken up and so on..I searched left and right, we are prepared to spend a little on the project too (RFIDs?), does anybody do something similar? I can provide with the script if needed (although it's really specific to our switches and naming scheme). Thanks! p.s. perhaps is this a question for stackoverflow? please move if it so.

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• Wrong sessionID being used in callback, but only on one particular computer

  - by user210119

  I am writing a Python/Django web application that uses OAuth (for the TwitterAPI, not that it should matter). I am storing a session ID in my login function, and then after using OAuth to get the user's token, I try to retrieve the sessionID in my callback function. The callback function then always fails(throws an exception) because it can't find the OAuth token in the session. Through the debugger, I am able to determine that the session ID that the server is using is incorrect - it does not match the session ID that was stored in the login function. It's therefore unsurprising that the Oauth tokens were not there. The session that appears in the callback was the same one each time (until I tried deleting it - see "things I've tried below"), and it started out as an old session, with some data in it that is from a different django app running on the same server that I hadn't touched in a couple weeks. Here's the kicker: everything I described is an issue only on our production server, and only when connecting to it from my computer. Let me clarify: this only happens with my particular laptop. I can connect to the app just fine from someone else's computer. Other people cannot connect with their accounts on my computer. Furthmore, I can connect just fine to the app when it is running on my localhost using the built-in django webserver, just not to the production server. My setup: my server and local box are running= Django 1.2.0 and Python 2.6.5. My local box is running Snow Leopard and the Django webserver, the server is running Ubuntu, Apache2, and mod-wsgi. For sessions, I am using Django's default session backend (DB). Things I have tried, all to no avail: logging in with a different account, including new accounts that have never OAuthed to this app before Clearing cookies, using incognito mode, using a different web browser on my same computer. Each time, upon inspecting my cookies, the sessionID matched the sessionID in the login function and was different from the sessionID in the callback. deleting the session in the database that appears in the callback function, (the one that appeared to be old data). The callback function still fails, and the sessionID it appears to be using is now a new one using a different session backend (DB-cache, flat file, etc...) restarting the server, my computer, etc. My first question on StackOverflow, so bear with me if I didn't quite follow local conventions. I am just at a loss as to what to even look for - what are the things that could possibly be causing sessions to not work on my particular computer, and (so far!) only my particular computer?

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• Moving from WDS to MDT + WDS - Prestaged Computer Name

  - by MSCF

  We previously used just WDS to deploy our images. WDS was setup to request approval for new machines. We used the "Name and Approve" option to name the machines as we added them. If it was pre-existing, it would just use the existing computer name from AD. Then in our unattend.xml file we had Computername=%MACHINENAME%. This picked up the name we gave it during approval and set the computer name accordingly. We are now implementing MDT to manage our images and drivers. But upon testing, we noticed it would assign random computer names. I went into the Unattend.xml for the deploy task sequence and added that value under Specialize amd64_Microsoft-Windows-Shell-Setup_neutral Computername=%MACHINENAME%. But when we try applying the image, it errors out at that point of the install. How can an MDT deployment be configured to leverage the pre-staged name? Some additional info: Error message during the imaging process: Windows could not parse or process the unattend answer file for pass [specialize]. The settings specified in the answer file cannot be applied. The error was detected while processing settings for component [Microsoft-Windows-Shell-Setup].? setuperr.log: 2014-07-22 14:02:13, Error [setup.exe] [Action Queue] : Unattend action failed with exit code 4 2014-07-22 14:02:13, Error [setup.exe] Execution of unattend GCs failed; hr = 0x0; pResults-hrResult = 0x8030000b

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• Overheating computer

  - by Samurai Waffle

  My computer overheats somewhat frequently, usually during intense use. And by intense use I mean browsing the internet while downloading, or gaming. It even overheats on extremely old games though, Master of Orion 2, which was developed for Windows 95. My computer has a Pentium 4 Ghz processor, 2 GB of ram, and is running Windows XP. One of the symptoms it has after overheating, is that it'll turn on immediately afterwards, but won't show any video on my monitor. I usually have to wait at least 5 minutes (mostly at least 10) before I can get it to turn on and show video on my monitor. I also usually have to wiggle around the graphics card a little bit, which is the ASUS A9550 Series with 256 MB. I'm not sure exactly what is causing the computer to overheat. At first I thought it was the video card, but after I noticed it was doing it while playing Master of Orion 2, I'm not so sure, because that game can't be making the video card work all that hard. So how exactly can I pinpoint the problem? Thanks for any help provided. Edit: Okay I downloaded the programs that you specified, and will start benchmarking my system to try and pinpoint what's overheating. What is the temperature range for when it's getting to hot? Also I have an abundant amount of software experience with computers, but unfortunately not to much hardware experience.

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• HTPC/DVR computer won't go into standby

  - by Robert

  When I select Start-Turn off computer-Standby the 'turn off computer' option window closes, and then nothing else happens. I can start new applications, and Windows acts like I never selected standby. I ran it for several hours after that. If I have a TV program scheduled to record when I select standby I get a window (the Pinnacle TV software) asking if I'm sure, there are programs scheduled to record - and the computer just keeps running after I select yes, never going into standby. I added that detail as it shows the standby process is starting. [This problem also happens if a TV program is not scheduled, so the scheduler task in not running/in memory. This problem happens regardless of whether I'm not watching TV. This problem happens regardless of whether Media Center is running (it usually isn't, I'm using Pinnacle to watch TV).] I looked at "How to troubleshoot hibernation and standby issues in Windows XP" http://support.microsoft.com/kb/907477 - ACPI is enabled, and "standby" is an option in "Power Options Properties." So it appears to be setup correctly. Windows XP SP3 Media Center Edition, all current updates installed.

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• Computer turns off unexpectedly

  - by Shahar

  My computer turns itself off unexpectedly after some time of use. It appears that this might be temperature related, but not for sure. I installed 2 tools that monitor temperature: SpeedFan and CPU Thermometer. The only definite finding is that there is a sensor (labelled temp1 in SpeedFan and CPU in CPU thermometer), which shows a temperature of 108C a second before the computer powers down. Until that moment, this sensor shows a constant temperature of 40C. I can usually reproduce the shutdown by viewing a few movies together, which cause another sensor (labelled CPU in SpeedFan) to go up to 60sC, but I do experience the problem even at times when this sensor remains low and cool. It does seem that the problem is more frequent if the computer is turned back on immediately after shutdown, but not always. I have had other hardware problems recently, which might be related: My hard disk heated up. I installed a fan on it, which worked to reduce the heat. The hard disk sensor shows around 40C. I had occasional blue screens and hard disk failures. Replacing the power supply seems to solve both these issues, but then this powerdown problem began appearing. I would appreciate any suggestions as to how to determine where the fault is, or what needs to be replaced.

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• Building Python 3.2.3 on redhat 5: missing _posixsubprocess

  - by Oz123

  I am trying to build Python3 on a RHEL 5.7 machine, I successful managed to build Python 3.2.2, with : # Install required build dependencies yum install openssl-devel bzip2-devel expat-devel gdbm-devel readline-devel sqlite-devel # Fetch and extract source. Please refer to http://www.python.org/download/releases # to ensure the latest source is used. wget http://www.python.org/ftp/python/3.2/Python-3.2.tar.bz2 tar -xjf Python-3.2.tar.bz2 cd Python-3.2 # Configure the build with a prefix (install dir) of /opt/python3, compile, and install. ./configure --prefix=/opt/python3 make But I am failing (?) with Python 3.2.3: Failed to build these modules: _posixsubprocess Is this a problem that should bother me ? How do I build it? I found this patch, but it's not included in sources Python 3.2.3 I obtained from the website ... Applying this patch on my sources, didn't solve the problem ... Here is the output from stderr: ~/tmp/Python-3.2.3 $ make > build.log ldd: warning: you do not have execution permission for `/usr/local/lib/libreadline.so' /usr/bin/ld: skipping incompatible /usr/local/lib/libreadline.so when searching for -lreadline /usr/bin/ld: skipping incompatible /usr/local/lib/libreadline.a when searching for -lreadline /home/oznahum/tmp/Python-3.2.3/Modules/_posixsubprocess.c: In function '_close_open_fd_range_safe': /home/oznahum/tmp/Python-3.2.3/Modules/_posixsubprocess.c:205: error: 'O_CLOEXEC' undeclared (first use in this function) /home/oznahum/tmp/Python-3.2.3/Modules/_posixsubprocess.c:205: error: (Each undeclared identifier is reported only once /home/oznahum/tmp/Python-3.2.3/Modules/_posixsubprocess.c:205: error: for each function it appears in.) /usr/bin/ld: skipping incompatible /usr/local/lib/libz.so when searching for -lz /usr/bin/ld: skipping incompatible /usr/local/lib/libz.so when searching for -lz ~/tmp/Python-3.2.3 $ grep posix build.log gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -I. -IInclude -I./Include -DPy_BUILD_CORE -c ./Modules/posixmodule.c -o Modules/posixmodule.o ar rc libpython3.2m.a Modules/_threadmodule.o Modules/signalmodule.o Modules/posixmodule.o Modules/errnomodule.o Modules/pwdmodule.o Modules/_sre.o Modules/_codecsmodule.o Modules/_weakref.o Modules/_functoolsmodule.o Modules/operator.o Modules/_collectionsmodule.o Modules/itertoolsmodule.o Modules/_localemodule.o Modules/_iomodule.o Modules/iobase.o Modules/fileio.o Modules/bytesio.o Modules/bufferedio.o Modules/textio.o Modules/stringio.o Modules/zipimport.o Modules/symtablemodule.o Modules/xxsubtype.o building '_posixsubprocess' extension gcc -pthread -fPIC -fno-strict-aliasing -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -IInclude -I/home/oznahum/localroot/include -I. -I./Include -I/usr/local/include -I/home/oznahum/tmp/Python-3.2.3 -c /home/oznahum/tmp/Python-3.2.3/Modules/_posixsubprocess.c -o build/temp.linux-x86_64-3.2/home/oznahum/tmp/Python-3.2.3/Modules/_posixsubprocess.o _posixsubprocess

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• The Koyal Group Info Mag News¦Charged building material could make the renewable grid a reality

  - by Chyler Tilton

  What if your cell phone didn’t come with a battery? Imagine, instead, if the material from which your phone was built was a battery. The promise of strong load-bearing materials that can also work as batteries represents something of a holy grail for engineers. And in a letter published online in Nano Letters last week, a team of researchers from Vanderbilt University describes what it says is a breakthrough in turning that dream into an electrocharged reality. The researchers etched nanopores into silicon layers, which were infused with a polyethylene oxide-ionic liquid composite and coated with an atomically thin layer of carbon. In doing so, they created small but strong supercapacitor battery systems, which stored electricity in a solid electrolyte, instead of using corrosive chemical liquids found in traditional batteries. These supercapacitors could store and release about 98 percent of the energy that was used to charge them, and they held onto their charges even as they were squashed and stretched at pressures up to 44 pounds per square inch. Small pieces of them were even strong enough to hang a laptop from—a big, fat Dell, no less. Although the supercapacitors resemble small charcoal wafers, they could theoretically be molded into just about any shape, including a cell phone’s casing or the chassis of a sedan. They could also be charged—and evacuated of their charge—in less time than is the case for traditional batteries. “We’ve demonstrated, for the first time, the simple proof-of-concept that this can be done,” says Cary Pint, an assistant professor in the university’s mechanical engineering department and one of the authors of the new paper. “Now we can extend this to all kinds of different materials systems to make practical composites with materials specifically tailored to a host of different types of applications. We see this as being just the tip of a very massive iceberg.” Pint says potential applications for such materials would go well beyond “neat tech gadgets,” eventually becoming a “transformational technology” in everything from rocket ships to sedans to home building materials. “These types of systems could range in size from electric powered aircraft all the way down to little tiny flying robots, where adding an extra on-board battery inhibits the potential capability of the system,” Pint says. And they could help the world shift to the intermittencies of renewable energy power grids, where powerful batteries are needed to help keep the lights on when the sun is down or when the wind is not blowing. “Using the materials that make up a home as the native platform for energy storage to complement intermittent resources could also open the door to improve the prospects for solar energy on the U.S. grid,” Pint says. “I personally believe that these types of multifunctional materials are critical to a sustainable electric grid system that integrates solar energy as a key power source.”

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• Computer won't boot from a bootable DVD

  - by JohnB

  My friend gave me his old computer that used to have WinXP on it. I'm trying to load Win7 on it and I thought there was something wrong because it wouldn't boot off a bootable disc, even though I setup the BIOS boot settings properly (I've done this sort of thing a million times). However, this closely related post helped me realize that I can boot off a bootable CD (WinXP), just not a DVD (Win7) Computer won’t boot from CD/DVD drive That might be the answer to my question, however, this motherboard is still pretty current technology. It's a good quality Gigabyte board, and judging from this product page, it came out in 2004. If I can't figure out a solution to my DVD boot problem, I'll have to try something like this: Boot and Install Windows from a USB thumb drive I guess it's possible that this motherboard doesn't allow booting from a DVD, but I still think that I might be missing something. It wouldn't be the DVD rom drive would it? I did try another drive and had the same results. However, I didn't try booting a DVD in the computer that the other test drive came out of, I'll do that later today. Any other advice? Thanks.

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• Populating a drive that was formated to ntsf on seperate computer

  - by Will Love

  I recently downloaded some files that were over 4gb and wouldnt do a straight transfer to a external hd. this is all being done on a serperate computer we shall call computer1. my computer(computer2) is where im trying to get the files too. i used cmd to "Soft format" the drive to NTSF on computer1 so i could then take the drive to transfer the files to computer2. this was suppose to allow the format change without losing the files i had on there already... after the proccess was done i checked the drive on computer1 and all the old files were there and working....when i took the drive back to computer2 to transfer the files i had just downloaded from computer2 my computer...computer1:wont reconize or populate the external drive so it can give it a drive letter and function. the external drive works fine on computer1, but how do i get it to work again on computer2? when i try to populate it, i cant access the properties function in order to make permissions for everyone so it is reconized....any help would be greatfull..... also i am running windows 7 ultimate edition if that helps.

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• Computer causing WiFi interference?

  - by Mannimarco

  I came back from college and brought my desktop computer. Family recently switched to Verizon FIOS and got a new router because of it. Unfortunately, my connection to the new wifi network is awful, with the download speeds (tested through speedtest.net) fluctuating wildly and often dropping below 1.5 Mbps. A laptop in the same room gets 20 Mbps. I've tried a new wireless card, thinking that mine got damaged in the move home but no luck. Here's where it gets weird: if I place the laptop near the computer, the laptop's download speeds often suffer greatly. Pulling the laptop away always fixes this. So now I'm under the impression that there's something in the computer (which I built a year ago and has had 0 issues up to this point) is causing an insane amount of wireless interference. Also bizarre: the upload speeds seem unaffected by this problem. On the laptop and desktop, upload speeds are generally around 5 Mpbs. Any ideas as to what could be causing this and how to test said theories would be fantastic.

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• Building NanoBSD inside a jail

  - by ptomli

  I'm trying to setup a jail to enable building a NanoBSD image. It's actually a jail on top of a NanoBSD install. The problem I have is that I'm unable to mount the md device in order to do the 'build image' part. Is it simply not possible to mount an md device inside a jail, or is there some other knob I need to twiddle? On the host /etc/rc.conf.local jail_enable="YES" jail_mount_enable="YES" jail_list="build" jail_set_hostname_allow="NO" jail_build_hostname="build.vm" jail_build_ip="192.168.0.100" jail_build_rootdir="/mnt/zpool0/jails/build/home" jail_build_devfs_enable="YES" jail_build_devfs_ruleset="devfsrules_jail_build" /etc/devfs.rules [devfsrules_jail_build=5] # nothing Inside the jail [root@build /usr/obj/nanobsd.PROLIANT_MICROSERVER]# sysctl security.jail security.jail.param.cpuset.id: 0 security.jail.param.host.hostid: 0 security.jail.param.host.hostuuid: 64 security.jail.param.host.domainname: 256 security.jail.param.host.hostname: 256 security.jail.param.children.max: 0 security.jail.param.children.cur: 0 security.jail.param.enforce_statfs: 0 security.jail.param.securelevel: 0 security.jail.param.path: 1024 security.jail.param.name: 256 security.jail.param.parent: 0 security.jail.param.jid: 0 security.jail.enforce_statfs: 1 security.jail.mount_allowed: 1 security.jail.chflags_allowed: 1 security.jail.allow_raw_sockets: 0 security.jail.sysvipc_allowed: 0 security.jail.socket_unixiproute_only: 1 security.jail.set_hostname_allowed: 0 security.jail.jail_max_af_ips: 255 security.jail.jailed: 1 [root@build /usr/obj/nanobsd.PROLIANT_MICROSERVER]# mdconfig -l md2 md0 md1 md0 and md1 are the ramdisks of the host. bsdlabel looks sensible [root@build /usr/obj/nanobsd.PROLIANT_MICROSERVER]# bsdlabel /dev/md2s1 # /dev/md2s1: 8 partitions: # size offset fstype [fsize bsize bps/cpg] a: 1012016 16 4.2BSD 0 0 0 c: 1012032 0 unused 0 0 # "raw" part, don't edit newfs runs ok [root@build /usr/obj/nanobsd.PROLIANT_MICROSERVER]# newfs -U /dev/md2s1a /dev/md2s1a: 494.1MB (1012016 sectors) block size 16384, fragment size 2048 using 4 cylinder groups of 123.55MB, 7907 blks, 15872 inodes. with soft updates super-block backups (for fsck -b #) at: 160, 253184, 506208, 759232 mount fails [root@build /usr/obj/nanobsd.PROLIANT_MICROSERVER]# mount /dev/md2s1a _.mnt/ mount: /dev/md2s1a : Operation not permitted UPDATE: One of my colleagues pointed out There are some file systems types that can't be securely mounted within a jail no matter what, like UFS, MSDOFS, EXTFS, XFS, REISERFS, NTFS, etc. because the user mounting it has access to raw storage and can corrupt it in a way that it will panic entire system. From http://www.mail-archive.com/[email protected]/msg160389.html So it seems that the standard nanobsd.sh won't run inside a jail while it uses the md device to build the image. One potential solution I'll try is to chroot from the host into the build jail, rather than jexec a shell.

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• Transferring 'Live' Documents to Another Computer

  - by waiwai933

  I was wondering if there was any OS/Application that has some support for transferring a document to another computer without having to save, transfer and then reopen. Basically, is there a way so that if I'm working on my desktop, I can click a button (or something similar) and then have the exact state of that computer/application transferred to another? For example, if I'm writing a document, is there a way to get it to computer B without saving it, putting the file on my flash drive, and having to reopen it? Edit: I just realized that this is possible through the wonderful phenomena known as cloud computing, but this is not the type of solution I'm looking for. Edit 2: I wanted to clarify: By 'save', I meant that I didn't want to have to save it to a special location, be that a (flash) drive or uploading to the web. Saving to the local hard drive is fine (and probably necessary, since technologies such as Bluetooth require the file to be saved somewhere). This is a bit inspired by a scene in Avatar, so I highly doubt that this actually exists... but if it does, I don't want to miss out.

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• Windows Explorer slow to open networked computer, fast to navigate once opened

  - by Scott Noyes

  I open Windows Explorer and enter an IP for a computer on my home network (\\192.168.1.101). It takes 30 seconds or more to present a list of the shared folders. It does not appear to be an initial handshaking/authentication thing; even if I allow the view to load and then immediately load the same again, it is always slow. Once they appear, navigating through folders and opening files is fast. Also, navigating directly to a folder (\\192.168.1.101\My Music) is fast, even if it's the first connection since a restart. Using \\computerName instead of the IP address gives exactly the same results. Pings return in 1ms. net view \\computerName (or \ipAddress) returns the list of shared folders fast. This makes me suspect an Explorer issue rather than a network issue. Suspecting that the remote computer was being automatically indexed or something, I went into Tools-Folder Options-View and unchecked "Automatically search for network folders and printers," but that made no difference. De-selecting the "Folders" icon near the address bar makes no difference. Adding the IP address and computer name to the hosts file makes no difference. Both computers involved are laptops running Windows XP. Both have WiFi and cable adapters. Mine is not connected via cable. The result is the same whether the target is plugged in to the cable or not (although the IP address changes - 192.168.1.101 over cable, 192.168.1.103 over WiFi.) We are using DHCP assigned by the router.

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• Building a PC for Work and play? [closed]

  - by Derek Organ

  Ok, Its been a long time since I build my own PC so I'm looking to get back into it again and build a new one. First off budget is about €800 excluding the monitor and windows 7 licence and mouse. (just bought a new g500) I plan on using my computer for work, lots of applications open at once but none particularly excessive (photoshop being the most demanding, mostly coding tools) I also use it for some gaming, e.g. COD, Starcraft etc. One thing I do want to do eventually is get a really good monitor with hight resolution and maybe 27" so the graphics card needs to be able to make best use of that. So a few questions 1) Is the bottle neck in performance mostly still the harddrives? 2) Aren't most processors e.g. i5 etc even i3 so far a head of other bottlenecks it makes litte difference the higher you go. Isn't the Graphics card dealing with heavy graphics so what really slows because of a slow CPU? So from this my thinking is to get a SSD drive as my primary drive for OS etc and have loads of memory e.g. 6-8GB and a decent mid level graphics card? It doesn't seem at my level worth spending much on CPU and any other parts really. I basic parts off the top of my head Case, Motherboard CPU SSD Drive SATA Drive Power Supply Memory Cooling (fan?) Graphics Card Network Card Keyboard DVD drive Mouse Windows Monitor Am I missing anything? Any helpful tips or general education much appreciated. Thanks, Derek

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• Coffee spilled and went inside CPU...computer not starting

  - by Harpreet

  Today coffee got spilled over my table, and some of it (very less) reached the CPU placed under the table. I think little bit of it got inside the CPU through the front face of the CPU. As that happened the fan started running very fast and made noise. I tried to restart to see if it becomes fine, but the computer didn't start again. First it gave an error of "Alert! Air temperature sensor not detected" and didn't start. Next I tried again multiple times of starting the computer but then it gave some memory error. I was not able to start the computer. Incase there's a problem in hard disk or something related to memory, is there any way we can extract our work or data? I am scared if I am not able to extract my work in case some problem occurs like that. What options would I have? Help! EDIT: I have attached the photo here and you can see the area spilt in red circle. The hard drive electronics have been affected and internal speaker may also have been affected. Any advise on cleaning and if hard drive can work? EDIT 2: Are there any professional services offered to extract data from blemished hard disk, like this one, in case I am not able to run it personally?

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• Computer won't go into standby

  - by Robert

  When I select Start-Turn off computer-Standby the 'turn off computer' option window closes, and then nothing else happens. I can start new applications, and Windows acts like I never selected standby. I ran it for several hours after that. If I have a TV program scheduled to record when I select standby I get a window (the Pinnacle TV software) asking if I'm sure, there are programs scheduled to record - and the computer just keeps running after I select yes, never going into standby. I added that detail as it shows the standby process is starting. [This problem also happens if a TV program is not scheduled, so the scheduler task in not running/in memory. This problem happens regardless of whether I'm not watching TV. This problem happens regardless of whether Media Center is running (it usually isn't, I'm using Pinnacle to watch TV).] I looked at "How to troubleshoot hibernation and standby issues in Windows XP" http://support.microsoft.com/kb/907477 - ACPI is enabled, and "standby" is an option in "Power Options Properties." So it appears to be setup correctly. Windows XP SP3 Media Center Edition, all current updates installed.

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