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• Configuring a Genius GW-7200 Access Point

  - by alex

  I came across an access point we had a few years ago. I'm now trying to get it set up to work on our network. here are a couple of pictures: http://twitpic.com/194u06/full http://twitpic.com/194u0v/full I have plugged this into our network via the network port on the back. I set up a DHCP reservation, based on the MAC address on the back of the access point, however I cannot ping it, nor access the web interface. I've held down the reset button for 10 seconds, to see if that would do anything. Google doesn't come up with anything on the matter :-(

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• System 67 error scheduled task to transfer files

  - by grom

  Running directly on command line the batch script works. But when scheduled to run (Windows 2003 R2 server) as the local administrator, I get the following error: D:\ScadaExport\exported>ping 192.168.10.78 Pinging 192.168.10.78 with 32 bytes of data: Reply from 192.168.10.78: bytes=32 time=11ms TTL=61 Reply from 192.168.10.78: bytes=32 time=15ms TTL=61 Reply from 192.168.10.78: bytes=32 time=29ms TTL=61 Reply from 192.168.10.78: bytes=32 time=10ms TTL=61 Ping statistics for 192.168.10.78: Packets: Sent = 4, Received = 4, Lost = 0 (0% loss), Approximate round trip times in milli-seconds: Minimum = 10ms, Maximum = 29ms, Average = 16ms D:\ScadaExport\exported>net use Z: \\192.168.10.78\bar-pccommon\scada\ System error 67 has occurred. The network name cannot be found. Any ideas? Google is turning up nothing useful, just keep finding results relating to DNS etc, but using IP address here.

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• How to implement an offline reader writer lock

  - by Peter Morris

  Some context for the question All objects in this question are persistent. All requests will be from a Silverlight client talking to an app server via a binary protocol (Hessian) and not WCF. Each user will have a session key (not an ASP.NET session) which will be a string, integer, or GUID (undecided so far). Some objects might take a long time to edit (30 or more minutes) so we have decided to use pessimistic offline locking. Pessimistic because having to reconcile conflicts would be far too annoying for users, offline because the client is not permanently connected to the server. Rather than storing session/object locking information in the object itself I have decided that any aggregate root that may have its instances locked should implement an interface ILockable public interface ILockable { Guid LockID { get; } } This LockID will be the identity of a "Lock" object which holds the information of which session is locking it. Now, if this were simple pessimistic locking I'd be able to achieve this very simply (using an incrementing version number on Lock to identify update conflicts), but what I actually need is ReaderWriter pessimistic offline locking. The reason is that some parts of the application will perform actions that read these complex structures. These include things like Reading a single structure to clone it. Reading multiple structures in order to create a binary file to "publish" the data to an external source. Read locks will be held for a very short period of time, typically less than a second, although in some circumstances they could be held for about 5 seconds at a guess. Write locks will mostly be held for a long time as they are mostly held by humans. There is a high probability of two users trying to edit the same aggregate at the same time, and a high probability of many users needing to temporarily read-lock at the same time too. I'm looking for suggestions as to how I might implement this. One additional point to make is that if I want to place a write lock and there are some read locks, I would like to "queue" the write lock so that no new read locks are placed. If the read locks are removed withing X seconds then the write lock is obtained, if not then the write lock backs off; no new read-locks would be placed while a write lock is queued. So far I have this idea The Lock object will have a version number (int) so I can detect multi-update conflicts, reload, try again. It will have a string[] for read locks A string to hold the session ID that has a write lock A string to hold the queued write lock Possibly a recursion counter to allow the same session to lock multiple times (for both read and write locks), but not sure about this yet. Rules: Can't place a read lock if there is a write lock or queued write lock. Can't place a write lock if there is a write lock or queued write lock. If there are no locks at all then a write lock may be placed. If there are read locks then a write lock will be queued instead of a full write lock placed. (If after X time the read locks are not gone the lock backs off, otherwise it is upgraded). Can't queue a write lock for a session that has a read lock. Can anyone see any problems? Suggest alternatives? Anything? I'd appreciate feedback before deciding on what approach to take.

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• Database which only holds indexes and last X records in memory?

  - by Xeoncross

  I'm looking for a data store that is very memory efficient while still allowing many object changes per second and disregarding ACID compliance for the last X records. I need this database for a server with not much memory and I can make a key-value store, document, or SQL database work. The idea is that indexes/keys are the only thing I need in memory and all the actual values/objects/rows can be saved on disk do to the low read rate (I just want index/key lookup to be fast). I also don't want records constantly being flushed to disk, so I would like the last X number of records to be held in memory so that 100 or so of them can all be written at once. I don't care if I lose the last 10 seconds worth of objects/values. I do care if the database as a whole is in danger of becoming corrupt. Is there a data-store like this?

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• Missing autochk program during boot

  - by a sandwhich

  I just resized a windows partition which involved shifting about 160GB to the left. After that it couldn't find the boot like normal so I ran the system repair tool like normal(I resize this partition a lot and each time I have to use the repair disk). But, this time, when I rebooted into the recovered 7 partition, it displayed the windows logo like normal but then flashed up autochk program not found -- skipping autocheck After that being on the screen for about 8 seconds, there was a flash of a bluescreen with white text and it rebooted. I have tried running the repair disk multiple times, but it returns and fixes the same problem each time, and the same thing happens on boot each time. Is there anything I can do to fix this short of reinstalling Windows? I have also ran two chkdsks from my vista partition with no errors reported and when viewing all the files on the drive everything seems to be in place.

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• The KMPlayer ... playing with colors

  - by ldigas

  I'm not a video editing type, so go easy on me ... practically don't know anything on the subject except that for some videos I view, "color modifying" works (buttons n, j, r for reset ...) and for some it doesn't. What influences that and how can I incluence contrast, saturation and so on on every video I play? (mostly some recordings of experiments in poor light conditions, so those controls really come in handy when viewing some details before taking out snapshots for reports) Also, KMPlayer has an enormous number of options. Is there one somewhere that can take a snapshot in a predefined directory of the what-I-see-on-screen every xy number of seconds?

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• Innodb : cannot allocate the memory for the buffer pool

  - by mingyeow

  My innodb keeps crashing. This is the error message below. Does anyone know why this keeps happening? InnoDB: by InnoDB 49201616 bytes. Operating system errno: 12 InnoDB: Check if you should increase the swap file or InnoDB: ulimits of your operating system. InnoDB: On FreeBSD check you have compiled the OS with InnoDB: a big enough maximum process size. InnoDB: Note that in most 32-bit computers the process InnoDB: memory space is limited to 2 GB or 4 GB. InnoDB: We keep retrying the allocation for 60 seconds... 0 processes alive and '/usr/bin/mysqladmin --defaults-file=/etc/mysql/debian.cnf ping' resulted in /usr/bin/mysqladmin: connect to server at 'localhost' failed error: 'Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)' Check that mysqld is running and that the socket: '/var/run/mysqld/mysqld.sock' exists! InnoDB: Fatal error: cannot allocate the memory for the buffer pool [ERROR] Default storage engine (InnoDB) is not available

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• Lingering tcp connection in LISTEN state

  - by Silvio Donnini

  My java application can sometimes be killed by an external script. This can be done either with SIGTERM or with SIGKILL. The application is a server which receives many connections per second, and it can be killed while trying to serve them. I would like to restart the application whenever it's killed, so I have prepared a script for that purpose. The problem is that, once the app has been killed, the new application instance can't bind to the port used by the previous instance, because the "Address is already in use". The previous instance's process has been definitely terminated, anyway the offending listening port is still there, but it is assigned to bash (or sh on other machines). Obviouly, my goal is to restart the application and let it bind successfully to the previous address. I've tried waiting more than 200 seconds before restarting to no avail, anyway I can't afford to wait that much. I've encountered this problem on all the machines I've ran the application (which is a jetty server with java 1.6). Any suggestion is appreciated, thanks, Silvio

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• Getting "-bash: fork: Resource temporarily unavailable" in OSX

  - by Joseph Tura

  I seem to run into problems with the max. number of processes every so often. Anyone know what is best practice for fixing this? Running OSX 10.6 on a MacBook Pro i7. ulimit -a returns these values: core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited file size (blocks, -f) unlimited max locked memory (kbytes, -l) unlimited max memory size (kbytes, -m) unlimited open files (-n) 256 pipe size (512 bytes, -p) 1 stack size (kbytes, -s) 8192 cpu time (seconds, -t) unlimited max user processes (-u) 266 virtual memory (kbytes, -v) unlimited When the error occurred I checked, and there were 102 running tasks and 523 threads.

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• Computer is totally crashed

  - by Napster

  my computer kept restarting on its own at random times varying from 1 minutes, to 20 minutes(then goind in a constant restart loop every ~10 seconds). I had to turn it off and wait minutes or hours before attempting to restarting to go further in the boot process. Now, it just does not turn on. I posted this before: Computer crashes every 2 to 10 minutes but I did not have the time to check the temperature. I don't want to pay to get it checked up, but I want to know what is wrong. Is the processor fried? Thank you

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• 1080p playback on external monitor

  - by xibalban

  My system (netbook) specs: 1.6 GHz dual core atom N2600 2 GB DDR3 RAM Integrated GMA3600 GPU Win 7 Professional 32 Bit Daum Pot Player V-1.5 The issue: I downloaded a 1.33 GB sized 1920 x 1080 HD documentary (file extension: mp4) and it plays without a hitch using pot player. However, when I connected an external display (an LED Full HD 24" monitor) using D-Sub, the video plays fine but the player controls become very unresponsive. For instance, it takes about 40 seconds to exit full screen while playing. I tried: Installed/updated all the latest monitor drivers Updated the VGA drivers for GMA3600 No other programs ran while the video played, with most unwanted services and background processes disabled/killed. CPU usage goes only up to 49% when the video plays Question: What may I do in order to improve the player response/video playback experience? Do I need to play with (or change) Pot Player's default video decoders, etc?

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• Hardware issue: UI freezes and hard drive light goes solid several times per hour

  - by alchemical

  I have a workstation that has been acting up for the last few weeks. It currently has Windows Server 2008 R2 installed on it, and 2 HDD mirrored. A few times per hour the screen will freeze up, applications will say "not responding", sometimes the screen will turn a lighter shaded color--at the same time the HDD light is on solid. This lasts anywhere from 10 to about 50 seconds. Could this be something with one of the drives or the mechanism keeping the mirror in place? Any other ideas?

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• F5 BigIP upgrade from 9.x to 10.x

  - by mbuk2k

  Having a few difficulties upgrading a Big IP 3400 from 9.4.8 to any version 10.x image. The following are the versions I've tried: 10.1.0.3341.0 10.2.2.763.3 10.2.3.112.0 10.2.4.577.0 To upgrade I'm running the following command: image2disk --format=volumes BIGIP-10.1.0.3341.0.iso Obviously replacing the version number with the relevant image I'm trying to upgrade to each time. The F5 reboots, and starts copying packages however after 30 seconds or so just stops copying. The cursor in the console is still flashing but no matter how long it's left, the package doesn't copy. It seems to be a different package with each version/image (but always the same package per version) at point of freezing, which I'm guessing is suggesting a space issue? I've checked free space on the device and it has over 2GB free at root which should surely be enough? If anyone has any advice or pointers, it would be kindly appreciated. Thank you

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• how to stop outgoing email spam

  - by James

  running an email system using roundcube, with about 200 people using it. 99% of them do as they are told and only email clients they have already spoken to, however 1% of them decide to bulk spam bcc emails, which then tripped an aol filter and almost got us banned from our host. I have disabled the guys account but I am worried about something similar happening in the future, what would be the best way to stop this? I read that if aol recieve 3 emails within 60 seconds from the same ip address then its an instant ban, so i am guessing with the big companies like google, their email accounts must have different ip addresses? and if so is there any way to implement a similar feature? Also i have spam assasin enabled, in this case what would be the best configuration for it?

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• Why does NetworkManager take so long to connect to the wireless network?

  - by spoulson

  I have a Dell Mini9 that came with Ubuntu 8.10. Out of the box, Wifi configuration was done under System settings - Network and worked straightforward. Then, after some update patches, NetworkManager was installed to replace this functionality. Initially, it did not carry over my settings and I had to figure out how to redo it. After lots of bumbling with it, it finally works. However, after bootup the NetworkManager icon waits about 2 minutes before even attempting to connect to the wireless network. Then, about a minute later, it connects and I'm on my way. The Mini9 boots up within 30 seconds from SSD, so opening Firefox and then waiting 3+ min for wireless networking is a bit of a pain. Can anything be done?

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• Why does NetworkManager take so long to connect to the wireless network?

  - by spoulson

  I have a Dell Mini9 that came with Ubuntu 8.10. Out of the box, Wifi configuration was done under System settings - Network and worked straightforward. Then, after some update patches, NetworkManager was installed to replace this functionality. Initially, it did not carry over my settings and I had to figure out how to redo it. After lots of bumbling with it, it finally works. However, after bootup the NetworkManager icon waits about 2 minutes before even attempting to connect to the wireless network. Then, about a minute later, it connects and I'm on my way. The Mini9 boots up within 30 seconds from SSD, so opening Firefox and then waiting 3+ min for wireless networking is a bit of a pain. Can anything be done?

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• LFTP when used with proxies doesn't work

  - by user2949465

  can't seem to use LFTP with proxies that require authentification correctly on my Ubuntu server. When I use it with proxy that doesn't require username/password everything seems fine: lftp lftp :~> set http:proxy http://HOST:PORT lftp :~> set ftp:proxy http://HOST:PORT lftp :~> open username:[email protected] lftp [email protected]:~> get file.ext file.ext 36352 bytes transferred in 10 seconds (3.5K/s) lftp [email protected]:~> exit but when I have to put username/password there is a problem: lftp lftp :~> set http:proxy http://proxylogin:proxypass@HOST:port lftp :~> set ftp:proxy http://proxylogin:proxypass@HOST:port lftp :~> open ftp://ftpuser:[email protected] answer: cd: Access failed: 401 Authentication Required (~) please someone help!

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• Recording Skype Video

  - by Leah Peterson

  I have two problems - When doing a Skype video call, I can't see the other person. Skype says both my input and output are fast/good. I need a good recording program that will save both sides at once in a podcast. I've been playing around with Vodburner, but it seems to be very temperamental. I can't get anything longer than 30 seconds to save and even when if it does save, the file isn't compatible with Windows Live Movie Maker, even when I change the extension to .MP4 or .WMV. I tried to downlowd the format changer http://www.mediacoderhq.com/ that Vodburner suggests, but only got errors. I'm using Windows 7 with 62 GB free.

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• Oracle tuning optimizer index cost adj and optimizer index caching

  - by Darryl Braaten

  What is the correct way to set the optimizer index cost adj parameter for Oracle. As a developer I have observed huge performance improvements as this parameter is lowered. Common queries are reduced from 2 seconds to 200ms. There are lots of warnings on the net that lowering this value will cause dire issues with the database, but no detail is given on what will start going wrong. I am currently only seeing only an upside, much improved application performance and no downside. I need to better understand the possible negative repercussions of adjusting these parameters.

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• Scripts on UNC paths take very long to run

  - by Álvaro G. Vicario

  I have several scripts in UNC paths (from Windows batch files to PHP scripts). No matter how I run them (double click on explorer, my editor's run command menu or Windows command prompt) they take really long to start running (like 14 seconds). Once they get started they run normally. This doesn't happen if I run them from mapped drives. I'm using Windows XP Professional SP3 inside an Active Directory domain and files are hosted in a Windows Server box (not sure about the version, it's an HP dedicated file server with bundled OS). Why does it happen? Is there a way to speed up things while using UNC paths?

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• nginx won't respond to monit

  - by Miko

  Although EngineX is running, monit can't seem to figure it out. Here's my monit log: [PDT Apr 13 02:19:19] error : HTTP error: Server returned status 400 [PDT Apr 13 02:19:19] error : 'nginx' failed protocol test [HTTP] at INET[localhost:80] via TCP [PDT Apr 13 02:19:19] info : 'nginx' trying to restart [PDT Apr 13 02:19:19] info : 'nginx' stop: /etc/init.d/nginx [PDT Apr 13 02:19:20] info : 'nginx' start: /etc/init.d/nginx The monitrc file contains the following configuration: if failed port 80 protocol http and request '/ping.txt' # check for response with timeout 20 seconds then restart I can access the file through lynx http://localhost:80/ping.txt without any problems. Why would monit have trouble requesting the file when nginx is running just fine?

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• dead man's switch for remote networking interventions

  - by ascobol

  Hi, As I'm going to change the network configuration of a remote server, I was thinking of some security mechanisms to protect me from accidentally loosing control on the server. The level-0 protection I'm using is a scheduled system reboot: # at now+x minutes > reboot > ctrl+D where x is the delay before reboot. While this works relatevly well for very simple tasks like playing with iptables this method has at least two drawbacks: It's not very reactive, ie a connectivity problem should be detected automatically if for example an automatic remote ssh command fails does not work anymore for x seconds. It can obviously not work if one need to modify some configuration files and then reboot to test the changes. Are you guys using some tool for the second point ? I would love to have something able to revert the system configuration in a previously known stable state if I can't join the server X minutes after reboot. Thanks!

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• On boot firmware request for intel GMA 3100 chipset timing out

  - by Yannick M.

  I am currently in the process of installing a Gentoo linux box with a Vanilla 2.6.29-r5 kernel with gentoo-xen-kernel patches in order to run the Xen Hypervisor. After rebooting with the new kernel, the booting process seemed to hang on: [ 0.863005] platform microcode: firmware: requesting intel-ucode/06-0f-07 [ 60.863442] Microcode Update Driver: v2.00-xen <[email protected]>, Peter Oruba Apparently the firmware request times out after 60 seconds (/sys/class/firmware/timeout) and booting just continues. I have done some research and have found that on RHEL-4 this problem was related to the mount of /sys changed and the firmware.agent hotplug script couldn't parse the line correctly. However I am having some difficulty tracking down how to fix this on Gentoo. Any and all ideas are greatly appreciated! Thanks

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• Monitoring mongrel with monit

  - by matnagel

  I wrote a monit.d file for mongrels which works in this version: check process redmine with pidfile /home/redmine/service/redmine.pid group webservice start program = "/usr/bin/mongrel_rails start -p 41328 -e production -d --pid /home/redmine/service/redmine.pid --user redmine --group redmine -a 127.0.0.1 -c /home/redmine/app" stop program = "/usr/bin/mongrel_rails stop --pid /home/redmine/service/redmine.pid -c /home/redmine/app && rm /home/redmine/service/redmine.pid > /dev/null 2>&1 if cpu greater 50% for 2 cycles then alert if cpu greater 80% for 3 cycles then restart if totalmem greater 60.0 MB for 5 cycles then restart if loadavg (5min) greater 4 for 8 cycles then restart if 3 restarts within 5 cycles then timeout $ Checking monit control file syntax... $ Control file syntax OK I want to also monitor the http response, so I add this line at the end: if failed port 41328 protocol http with timeout 10 seconds then restart Now monit complains: $ Checking monit control file syntax... $ /etc/monit.d/redmine:16: Error: exceeded maximum number of program arguments 'http' $ ERROR: CHECK MONIT CONFIG FILE SYNTAX How do I correctly monitor the port?

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• Print spooler consumes over 1GB of memory

  - by Stephen Jennings

  Suddenly, on a Windows Vista Business workstation I manage, the Windows print spooler service is consuming over 1GB of memory. I got the call this morning that the user could not print. I discovered all printers were missing from the Printers applet in Control Panel. I rebooted the machine, and at first the printers were still missing, but after a few minutes (and much banging my head against the wall) they suddenly appeared. I stopped worrying about it until later today it happened again to the same workstation. To my knowledge, nothing has changed on the computer. No new printers have been added, no new print drivers would have been installed, and no new software is being used. I tried clearing out the spooler folder (C:\Windows\System32\spooler\printers) which did have four print jobs from this morning, but the problem persists after restarting the spooler service. When starting the service, it starts out using 824 KB of memory, then after about 20 seconds it starts creeping up about 10MB each second until it stabilizes around 1.8GB.

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