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• How do you splice out a part of an xvid encoded avi file, with ffmpeg? (no problems with other files

  - by yegor

  Im using the following command, which works for most files, except what seems to be xvid encoded ones /usr/bin/ffmpeg -sameq -i file.avi -ss 00:01:00 -t 00:00:30 -ac 2 -r 25 -copyts output.avi So this should basically splice out 30 seconds of video + audio, starting from 1 minute mark. It does START encoding at the 00:01:00 mark but it goes all the way to the end of the file for some reason, ignoring that I want just 30 seconds. The output looks like this. FFmpeg version git-ecc4bdd, Copyright (c) 2000-2010 the FFmpeg developers built on May 31 2010 04:52:24 with gcc 4.4.3 20100127 (Red Hat 4.4.3-4) configuration: --enable-libx264 --enable-libxvid --enable-libmp3lame --enable-libopenjpeg --enable-libfaac --enable-libvorbis --enable-gpl --enable-nonfree --enable-libxvid --enable-pthreads --enable-libfaad --extra-cflags=-fPIC --enable-postproc --enable-libtheora --enable-libvorbis --enable-shared libavutil 50.15. 2 / 50.15. 2 libavcodec 52.67. 0 / 52.67. 0 libavformat 52.62. 0 / 52.62. 0 libavdevice 52. 2. 0 / 52. 2. 0 libavfilter 1.20. 0 / 1.20. 0 libswscale 0.10. 0 / 0.10. 0 libpostproc 51. 2. 0 / 51. 2. 0 [mpeg4 @ 0x17cf770]Invalid and inefficient vfw-avi packed B frames detected Input #0, avi, from 'file.avi': Metadata: ISFT : VirtualDubMod 1.5.10.2 (build 2540/release) Duration: 00:02:00.00, start: 0.000000, bitrate: 1587 kb/s Stream #0.0: Video: mpeg4, yuv420p, 672x368 [PAR 1:1 DAR 42:23], 25 tbr, 25 tbn, 25 tbc Stream #0.1: Audio: ac3, 48000 Hz, 5.1, s16, 448 kb/s File 'lol6.avi' already exists. Overwrite ? [y/N] y Output #0, avi, to 'lol6.avi': Metadata: ISFT : Lavf52.62.0 Stream #0.0: Video: mpeg4, yuv420p, 672x368 [PAR 1:1 DAR 42:23], q=2-31, 200 kb/s, 25 tbn, 25 tbc Stream #0.1: Audio: mp2, 48000 Hz, 2 channels, s16, 64 kb/s Stream mapping: Stream #0.0 -> #0.0 Stream #0.1 -> #0.1 Press [q] to stop encoding [mpeg4 @ 0x17cf770]Invalid and inefficient vfw-avi packed B frames detected [buffer @ 0x184b610]Buffering several frames is not supported. Please consume all available frames before adding a new one. frame= 1501 fps=104 q=0.0 Lsize= 15612kB time=30.02 bitrate=4259.7kbits/s ts/s video:15303kB audio:235kB global headers:0kB muxing overhead 0.482620% if I convert this file to mp4 for example, and then perform the same action, it works perfectly.

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• SQL Server 2008 - Error starting service - model.mdf not found?!

  - by alex

  my SQL server 2008 was running fine. About an hour ago, it suddenly stopped - the MSSQLSERVER service had stopped I right clicked, clicked start, and it said the service had started, and stopped I looked in the event log and saw these two errors: 17207 : udopen: Operating system error 3(error not found) during the creation/opening of physical device C:\Program Files\Microsoft SQL Server\MSSQL\data\model.mdf. 17204 : FCB::Open failed: Could not open device C:\Program Files\Microsoft SQL Server\MSSQL\data\model.mdf for virtual device number (VDN) 1. The model.mdf db has NEVER been in that location - i specified drive F: to use for data / log during install. I checked the SQL Configuration Manager, to try and set startup params, but SQL Server is not listed as one of the services..... EDIT: I've now moved the db to where it was looking for: C:\Program Files\Microsoft SQL Server\MSSQL\data\ directory. Now if I start the service, it still does not work - i get this error message in the log: Could not find row in sysindexes for database ID 3, object ID 1, index ID 1. Run DBCC CHECKTABLE on sysindexes. Interestingly, i checked the error log - around the time users reported problems, there is this: 2010-01-08 17:11:26.44 spid51 Configuration option 'show advanced options' changed from 0 to 1. Run the RECONFIGURE statement to install. 2010-01-08 17:11:26.44 spid51 FILESTREAM: effective level = 0, configured level = 0, file system access share name = 'MSSQLSERVER'. 2010-01-08 17:11:26.44 spid51 Configuration option 'Agent XPs' changed from 1 to 0. Run the RECONFIGURE statement to install. 2010-01-08 17:11:26.44 spid51 FILESTREAM: effective level = 0, configured level = 0, file system access share name = 'MSSQLSERVER'. 2010-01-08 17:11:26.44 spid51 Configuration option 'show advanced options' changed from 1 to 0. Run the RECONFIGURE statement to install. 2010-01-08 17:11:26.44 spid51 FILESTREAM: effective level = 0, configured level = 0, file system access share name = 'MSSQLSERVER'. 2010-01-08 17:11:44.89 spid10s Service Broker manager has shut down. 2010-01-08 17:11:47.83 spid7s SQL Server is terminating in response to a 'stop' request from Service Control Manager. This is an informational message only. No user action is required. 2010-01-08 17:11:47.83 spid7s SQL Trace was stopped due to server shutdown. Trace ID = '1'. This is an informational message only; no user action is required.

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• Computer suddenly dies; screen displays weird flickering lines, then restarts

  - by Imray

  I've been having this terrible problem for a little while and just managed to get a picture of 'dead screen' for the first time and I am posting it to seek help. Randomly, at irregular intervals (typically once a week), while working on something (it's been different things every time) my computer will just suddenly go dead - the screen turns to exactly the picture below (the lines flicker a little bit), it hangs there for a few seconds and then restarts. Obviously this is extremely frustrating and I want to try to stop it. I've searched numerous postings with similar keywords but nothing exactly the same as mine. Does anyone have any idea what might be the cause of this? I would post all my system settings and installed programs but the list is long and I don't know how much relevance each item would be. If you'd like to know something specific, please comment and I'll let you know whatever you need. SPECS C:\Users\Imray>systeminfo Host Name: Imray OS Name: Microsoft Windows 7 Professional OS Version: 6.1.7600 N/A Build 7600 OS Manufacturer: Microsoft Corporation OS Configuration: Standalone Workstation OS Build Type: Multiprocessor Free Registered Owner: Imray - Owner Registered Organization: Product ID: 00371-152-9333854-85895 Original Install Date: 06/09/1999, 5:45:21 PM System Boot Time: 22/03/2013, 8:58:18 AM System Manufacturer: Gateway System Model: DX4840 System Type: x64-based PC Processor(s): 1 Processor(s) Installed. [01]: Intel64 Family 6 Model 37 Stepping 2 GenuineIntel ~3201 Mhz BIOS Version: American Megatrends Inc. P01-A3 , 17/05/2010 Windows Directory: C:\Windows System Directory: C:\Windows\system32 Boot Device: \Device\HarddiskVolume2 System Locale: en-us;English (United States) Input Locale: en-us;English (United States) Time Zone: (UTC-05:00) Eastern Time (US & Canada) Total Physical Memory: 6,135 MB Available Physical Memory: 3,632 MB Virtual Memory: Max Size: 12,268 MB Virtual Memory: Available: 8,114 MB Virtual Memory: In Use: 4,154 MB Page File Location(s): C:\pagefile.sys Domain: WORKGROUP Logon Server: \\Imray-OWNER Hotfix(s): 4 Hotfix(s) Installed. [01]: KB971033 [02]: KB958559 [03]: KB977206 [04]: KB981889 Network Card(s): 2 NIC(s) Installed. [01]: 802.11n Wireless PCI Express Card LAN Adapter Connection Name: Wireless Network Connection DHCP Enabled: Yes DHCP Server: 192.168.2.1 IP address(es) [01]: 192.168.2.13 [02]: fe80::1df1:5399:6890:91f6 [02]: Microsoft Virtual WiFi Miniport Adapter Connection Name: Wireless Network Connection 2 DHCP Enabled: Yes DHCP Server: N/A IP address(es) Graphics Card Specs Name ATI Radeon HD 5570 PNP Device ID PCI\VEN_1002&DEV_68D9&SUBSYS_E142174B&REV_00\4&18A4B35E&0&0008 Adapter Type ATI display adapter (0x68D9), ATI Technologies Inc. compatible Adapter Description ATI Radeon HD 5570 Adapter RAM 1.00 GB (1,073,741,824 bytes) Installed Drivers atiu9p64 aticfx64 aticfx64 atiu9pag aticfx32 aticfx32 atiumd64 atidxx64 atidxx64 atiumdag atidxx32 atidxx32 atiumdva atiumd6a atitmm64 Driver Version 8.700.0.0 INF File oem1.inf (ati2mtag_Evergreen section) Color Planes Not Available Color Table Entries 4294967296 Resolution 1920 x 1080 x 59 hertz Bits/Pixel 32 Memory Address 0xD0000000-0xDFFFFFFF Memory Address 0xFBDE0000-0xFBDFFFFF I/O Port 0x0000D000-0x0000DFFF IRQ Channel IRQ 4294967293 I/O Port 0x000003B0-0x000003BB I/O Port 0x000003C0-0x000003DF Memory Address 0xA0000-0xBFFFF Driver c:\windows\system32\drivers\atikmpag.sys (8.14.1.6095, 181.00 KB (185,344 bytes), 06/09/1999 5:59 PM)

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• What the best way to achieve RPO of zero and lowest possible RTO (less than 15 minutes) with SQL 2008 R2?

  - by Adrian Hope-Bailie

  We are running a payments (EFT transaction processing) application which is processing high volumes of transactions 24/7 and are currently investigating a better way of doing DB replication to our disaster recovery site. Our current and previous strategies have included using both DoubleTake and Redgate to replicate data to a warm stand-by. DoubleTake is the supported solution from the payments software vendor however their (DoubleTake's) support in South Africa is very poor. We had a few issues and simply couldn't ever resolve them so we had to give up on DoubleTake. We have been using Redgate to manually read the data from the primary site (via queries) and write to the DR site but this is: A bad solution Getting the software vendor hot and bothered whenever we have support issues as it has a tendency to interfere with the payment application which is very DB intensive. We recently upgraded the whole system to run on SQL 2008 R2 Enterprise which means we should probably be looking at using some of the built-in replication features. The server has 2 fairly large databases with a mixture of tables containing highly volatile transactional data and pretty static configuration data. Replication would be done over a WAN link to a separate physical site and needs to achieve the following objectives. RPO: Zero loss - This is transactional data with financial impact so we can't lose anything. RTO: Tending to zero - The business depends on our ability to process transactions every minute we are down we are losing money I have looked at a few of the other questions/answers but none meet our case exactly: SQL Server 2008 failover strategy - Log shipping or replication? How to achieve the following RTO & RPO with logshipping only using SQL Server? What is the best of two approaches to achieve DB Replication? My current thinking is that we should use mirroring but I am concerned that for RPO:0 we will need to do delayed commits and this could impact the performance of the primary DB which is not an option. Our current DR process is to: Stop incoming traffic to the primary site and allow all in-flight transaction to complete. Allow the replication to DR to complete. Change network routing to route to DR site. Start all applications and services on the secondary site (Ideally we can change this to a warmer stand-by whereby the applications are already running but not processing any transactions). In other words the DR database needs to, as quickly as possible, catch up with primary and be ready for processing as the new primary. We would then need to be able to reverse this when we are ready to switch back. Is there a better option than mirroring (should we be doing log-shipping too) and can anyone suggest other considerations that we should keep in mind?

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• Both nginx and php5-fpm init.d startup scripts are non-functional and returning no errors..? But they used to work perfectly

  - by Ollie Treend

  I have been using nginx and php5-fpm on my Ubuntu box for a while now. Everything has been configured and setup correctly, and it ran like a charm. I have been keeping the packages updated & upgraded as usual, but haven't touched the nginx OR php5-fpm config files at all (thus I'm pretty sure this isn't my fault... ) Basically, I noticed nginx wasn't running as it should be. I ran the command sudo service nginx start, and the script did nothing. The same thing happens when trying to do anything - start, stop, restart or reload. This also happens for the "php5-fpm" init script - although all other init scripts seem to be functioning correctly. When trying to start nginx OR php5-fpm, this is what happens: root@HAL:/etc# service php5-fpm start root@HAL:/etc# I can't understand what is going wrong. The script isn't returning errors, but similarly it isn't starting the daemon or reporting success as usual. For reference, both installations are from the official nginx and php5-fpm PPAs. The fact that both started doing this at the same time has thrown me - since they are both unrelated packages. I have since purged both sets of packages from my system with apt-get purge ... and also apt-get remove --purge ... both of which have successfully removed the packages, their config files, and their init.d startup scripts. After having reinstalled nginx, I now have a functioning startup script again - I can start the web server as usual. However, php5-fpm is still experiencing the strange premature exiting of the startup script.. and I really can't figure out what's causing it. I have no idea what caused this to occur initially, but have managed to fix nginx. I now need to fix the php5-fpm startup script. If anybody could shed some light on this situation, I would be very grateful! The chances are both these issues are related - and they were caused by me doing something stupid. But now I need to fix it. This time I was lucky - because these problems are just on my development server. But I have 2 other live servers which are configured in a similar way, and I am worried the same thing will happen to these two as well! Has anybody else come across this? Do you have any words of advice? Thank you

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• How do you splice out a part of an xvid encoded avi file, with ffmpeg? (no problems with other files)

  - by user11955

  Im using the following command, which works for most files, except what seems to be xvid encoded ones /usr/bin/ffmpeg -sameq -i file.avi -ss 00:01:00 -t 00:00:30 -ac 2 -r 25 -copyts output.avi So this should basically splice out 30 seconds of video + audio, starting from 1 minute mark. It does START encoding at the 00:01:00 mark but it goes all the way to the end of the file for some reason, ignoring that I want just 30 seconds. The output looks like this. FFmpeg version git-ecc4bdd, Copyright (c) 2000-2010 the FFmpeg developers built on May 31 2010 04:52:24 with gcc 4.4.3 20100127 (Red Hat 4.4.3-4) configuration: --enable-libx264 --enable-libxvid --enable-libmp3lame --enable-libopenjpeg --enable-libfaac --enable-libvorbis --enable-gpl --enable-nonfree --enable-libxvid --enable-pthreads --enable-libfaad --extra-cflags=-fPIC --enable-postproc --enable-libtheora --enable-libvorbis --enable-shared libavutil 50.15. 2 / 50.15. 2 libavcodec 52.67. 0 / 52.67. 0 libavformat 52.62. 0 / 52.62. 0 libavdevice 52. 2. 0 / 52. 2. 0 libavfilter 1.20. 0 / 1.20. 0 libswscale 0.10. 0 / 0.10. 0 libpostproc 51. 2. 0 / 51. 2. 0 [mpeg4 @ 0x17cf770]Invalid and inefficient vfw-avi packed B frames detected Input #0, avi, from 'file.avi': Metadata: ISFT : VirtualDubMod 1.5.10.2 (build 2540/release) Duration: 00:02:00.00, start: 0.000000, bitrate: 1587 kb/s Stream #0.0: Video: mpeg4, yuv420p, 672x368 [PAR 1:1 DAR 42:23], 25 tbr, 25 tbn, 25 tbc Stream #0.1: Audio: ac3, 48000 Hz, 5.1, s16, 448 kb/s File 'lol6.avi' already exists. Overwrite ? [y/N] y Output #0, avi, to 'lol6.avi': Metadata: ISFT : Lavf52.62.0 Stream #0.0: Video: mpeg4, yuv420p, 672x368 [PAR 1:1 DAR 42:23], q=2-31, 200 kb/s, 25 tbn, 25 tbc Stream #0.1: Audio: mp2, 48000 Hz, 2 channels, s16, 64 kb/s Stream mapping: Stream #0.0 -> #0.0 Stream #0.1 -> #0.1 Press [q] to stop encoding [mpeg4 @ 0x17cf770]Invalid and inefficient vfw-avi packed B frames detected [buffer @ 0x184b610]Buffering several frames is not supported. Please consume all available frames before adding a new one. frame= 1501 fps=104 q=0.0 Lsize= 15612kB time=30.02 bitrate=4259.7kbits/s ts/s video:15303kB audio:235kB global headers:0kB muxing overhead 0.482620% if I convert this file to mp4 for example, and then perform the same action, it works perfectly.

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• Some services refusing to start on Win 7 machine. What could the root cause be?

  - by BombDefused

  When I check msconfig, there are no services that are blocked from starting up. When I look in services.msc, the problem services have a start up type of 'Automatic', but have a blank space where others will show 'Started'. Attempting to start them manually results in the following pop up error messages. I have no idea what's causing this, looks like some sort of cascade effect from another problem service. It's affecting scheduled tasks, SQL server agent and windows back up services. How can I resolve this? I don't know how to work out what the root cause is. Task Scheduler Service Start Error: "Windows could not start the Task Scheduler service on local computer. 1068: The dependecy service or group failed to start. SQL Server Service Start Error: "The SQL Server Agent service on Local Computer started and then stopped. Some services stop automatically if they are not in use by other services or programs." UPDATE: I've just noticed some other services have a description of "Failed to Read Description. Error Code: 2" They are: NetMsmqActivator, NetPipeActivator, NetTcpActivator, NetTcpPortSharing UPDATE 2: As joeqwerty says the Event Log service does seem to be the root of the problem. This service will not start either. It fails with 'Error 31 - A device attached to the system is not functioning correctly'. I've tried detaching all devices. I've also followed the advice here, where the same problem is described, but with no luck: http://social.technet.microsoft.com/Forums/en/w7itprosecurity/thread/44479c49-55e6-4bd7-b25e-3f2a6497306e Update 3 @ Pacey - The following was a good tip, really clear instruction. However, I found that those reg keys do not exist on my system. "Your Problem might also derive from the UpperFilter or LowerFilter Settings of the CDROM Drive. These are a known cause for Errorcode 31. You can find step-by-step instructions on removing the filters on about.com" I followed the advice through to checking every component in device manager separately, but everything is reported as working correctly!? These services did all work at one point. The hardware set up hasn't changed much. Guess I'm looking at a repair install maybe???!

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• ssh client problem: Connection reset by peer

  - by yonix

  I'm having a really annoying problem on my Ubuntu laptop. I noticed it today, after upgrading to Ubuntu 11.04, although I'm not entirely sure this is the cause as I played with my ssh keys a few days ago. The problem is, whenever I try to ssh to ANY host I get the following error: Read from socket failed: Connection reset by peer running with -vvv gives the following output: OpenSSH_5.8p1 Debian-1ubuntu3, OpenSSL 0.9.8o 01 Jun 2010 debug1: Reading configuration data /etc/ssh/ssh_config debug1: Applying options for * debug2: ssh_connect: needpriv 0 debug1: Connecting to hostname [10.0.0.2] port 22. debug1: Connection established. debug1: permanently_set_uid: 0/0 debug1: identity file /root/.ssh/id_rsa type -1 debug1: identity file /root/.ssh/id_rsa-cert type -1 debug1: identity file /root/.ssh/id_dsa type -1 debug1: identity file /root/.ssh/id_dsa-cert type -1 debug1: identity file /root/.ssh/id_ecdsa type -1 debug1: identity file /root/.ssh/id_ecdsa-cert type -1 debug1: Remote protocol version 1.99, remote software version OpenSSH_4.2 debug1: match: OpenSSH_4.2 pat OpenSSH_4* debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_5.8p1 Debian-1ubuntu3 debug2: fd 3 setting O_NONBLOCK debug3: load_hostkeys: loading entries for host "hostname" from file "/root/.ssh/known_hosts" debug3: load_hostkeys: loaded 0 keys debug1: SSH2_MSG_KEXINIT sent Read from socket failed: Connection reset by peer My /etc/ssh/ssh_config: Host * SendEnv LANG LC_* HashKnownHosts yes GSSAPIAuthentication no GSSAPIDelegateCredentials no I can connect to my laptop from any other server via ssh, and I can also ssh localhost from my laptop successfully. I can connect to all these other server from other laptops, and I don't see anything in the logs of the other servers regarding my failed attempt. I tried to stop iptables, didn't help. I tried several tricks I could find online with my /etc/ssh/ssh_config, but I was unsuccessful in solving the problem... Any ideas? Edit: This is the log from one of the hosts I try to connect to: May 1 19:15:23 localhost sshd[2845]: debug1: Forked child 2847. May 1 19:15:23 localhost sshd[2845]: debug3: send_rexec_state: entering fd = 8 config len 577 May 1 19:15:23 localhost sshd[2845]: debug3: ssh_msg_send: type 0 May 1 19:15:23 localhost sshd[2845]: debug3: send_rexec_state: done May 1 19:15:23 localhost sshd[2847]: debug1: rexec start in 5 out 5 newsock 5 pipe 7 sock 8 May 1 19:15:23 localhost sshd[2847]: debug1: inetd sockets after dupping: 3, 3 May 1 19:15:23 localhost sshd[2847]: Connection from 10.0.0.7 port 55747 May 1 19:15:23 localhost sshd[2847]: debug1: Client protocol version 2.0; client software version OpenSSH_5.8p1 Debian-1ubuntu3 May 1 19:15:23 localhost sshd[2847]: debug1: match: OpenSSH_5.8p1 Debian-1ubuntu3 pat OpenSSH* May 1 19:15:23 localhost sshd[2847]: debug1: Enabling compatibility mode for protocol 2.0 May 1 19:15:23 localhost sshd[2847]: debug1: Local version string SSH-2.0-OpenSSH_5.3 May 1 19:15:23 localhost sshd[2847]: debug2: fd 3 setting O_NONBLOCK May 1 19:15:23 localhost sshd[2847]: debug2: Network child is on pid 2848 May 1 19:15:23 localhost sshd[2847]: debug3: preauth child monitor started May 1 19:15:23 localhost sshd[2847]: debug3: mm_request_receive entering May 1 19:15:23 localhost sshd[2848]: debug3: privsep user:group 74:74 May 1 19:15:23 localhost sshd[2848]: debug1: permanently_set_uid: 74/74 May 1 19:15:23 localhost sshd[2848]: debug1: list_hostkey_types: ssh-rsa,ssh-dss May 1 19:15:23 localhost sshd[2848]: debug1: SSH2_MSG_KEXINIT sent May 1 19:15:23 localhost sshd[2848]: debug3: Wrote 784 bytes for a total of 805 May 1 19:15:23 localhost sshd[2848]: fatal: Read from socket failed: Connection reset by peer

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• AMD Catalyst 13.9 installation failure

  - by Simon Verbeke

  Earlier today I installed Windows 8.1, and when I wanted to go into Catalyst Control Center, I noticed some odd error of CCC not being able to display options. I then figured I needed a driver update, so I downloaded the latest drivers, version 13.9, and tried to install them. While it was trying to install the display drivers, I got a blue screen. Tried again and got the same. Then I used an uninstall tool from AMD to remove all traces of my old drivers and tried to install the new drivers. Again, a blue screen. This is all I could think of to try. Would anyone know some other things I can try? EDIT: thought I might want to include the log entry for the crash: - <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event"> - <System> <Provider Name="Microsoft-Windows-WER-SystemErrorReporting" Guid="{ABCE23E7-DE45-4366-8631-84FA6C525952}" EventSourceName="BugCheck" /> <EventID Qualifiers="16384">1001</EventID> <Version>0</Version> <Level>2</Level> <Task>0</Task> <Opcode>0</Opcode> <Keywords>0x80000000000000</Keywords> <TimeCreated SystemTime="2013-10-19T20:59:25.000000000Z" /> <EventRecordID>26587</EventRecordID> <Correlation /> <Execution ProcessID="0" ThreadID="0" /> <Channel>System</Channel> <Computer>Simon-PC</Computer> <Security /> </System> - <EventData> <Data Name="param1">0x0000007e (0xffffffffc0000005, 0xfffff80002a86dca, 0xffffd00025f250e8, 0xffffd00025f248f0)</Data> <Data Name="param2">C:\WINDOWS\MEMORY.DMP</Data> <Data Name="param3">101913-8953-01</Data> </EventData> </Event> Another edit: As it turns out, the graphics card isn't showing up any more in the device manager. But as far as I can tell, it is still working (the fans are spinning and my screen is plugged into that graphics card). This is solved. it appears that my graphics card is now running with a default windows driver. I also tried the forced method mentioned here: AMD Graphics Drivers won't install properly . But I still get a BSOD. Third edit: Slight succes! Managed to install version 13.4. Everything appears to be working fine now. I think I'm just going to skip version 13.9.

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• Distributed and/or Parallel SSIS processing

  - by Jeff

  Background: Our company hosts SaaS DSS applications, where clients provide us data Daily and/or Weekly, which we process & merge into their existing database. During business hours, load in the servers are pretty minimal as it's mostly users running simple pre-defined queries via the website, or running drill-through reports that mostly hit the SSAS OLAP cube. I manage the IT Operations Team, and so far this has presented an interesting "scaling" issue for us. For our daily-refreshed clients, the server is only "busy" for about 4-6 hrs at night. For our weekly-refresh clients, the server is only "busy" for maybe 8-10 hrs per week! We've done our best to use some simple methods of distributing the load by spreading the daily clients evenly among the servers such that we're not trying to process daily clients back-to-back over night. But long-term this scaling strategy creates two notable issues. First, it's going to consume a pretty immense amount of hardware that sits idle for large periods of time. Second, it takes significant Production Support over-head to basically "schedule" the ETL such that they don't over-lap, and move clients/schedules around if they out-grow the resources on a particular server or allocated time-slot. As the title would imply, one option we've tried is running multiple SSIS packages in parallel, but in most cases this has yielded VERY inconsistent results. The most common failures are DTExec, SQL, and SSAS fighting for physical memory and throwing out-of-memory errors, and ETLs running 3,4,5x longer than expected. So from my practical experience thus far, it seems like running multiple ETL packages on the same hardware isn't a good idea, but I can't be the first person that doesn't want to scale multiple ETLs around manual scheduling, and sequential processing. One option we've considered is virtualizing the servers, which obviously doesn't give you any additional resources, but moves the resource contention onto the hypervisor, which (from my experience) seems to manage simultaneous CPU/RAM/Disk I/O a little more gracefully than letting DTExec, SQL, and SSAS battle it out within Windows. Question to the forum: So my question to the forum is, are we missing something obvious here? Are there tools out there that can help manage running multiple SSIS packages on the same hardware? Would it be more "efficient" in terms of parallel execution if instead of running DTExec, SQL, and SSAS same machine (with every machine running that configuration), we run in pairs of three machines with SSIS running on one machine, SQL on another, and SSAS on a third? Obviously that would only make sense if we could process more than the three ETL we were able to process on the machine independently. Another option we've considered is completely re-architecting our SSIS package to have one "master" package for all clients that attempts to intelligently chose a server based off how "busy" it already is in terms of CPU/Memory/Disk utilization, but that would be a herculean effort, and seems like we're trying to reinvent something that you would think someone would sell (although I haven't had any luck finding it). So in summary, are we missing an obvious solution for this, and does anyone know if any tools (for free or for purchase, doesn't matter) that facilitate running multiple SSIS ETL packages in parallel and on multiple servers? (What I would call a "queue & node based" system, but that's not an official term). Ultimately VMWare's Distributed Resource Scheduler addresses this as you simply run a consistent number of clients per VM that you know will never conflict scheduleing-wise, then leave it up to VMWare to move the VMs around to balance out hardware usage. I'm definitely not against using VMWare to do this, but since we're a 100% Microsoft app stack, it seems like -someone- out there would have solved this problem at the application layer instead of the hypervisor layer by checking on resource utilization at the OS, SQL, SSAS levels. I'm open to ANY discussion on this, and remember no suggestion is too crazy or radical! :-) Right now, VMWare is the only option we've found to get away from "manually" balancing our resources, so any suggestions that leave us on a pure Microsoft stack would be great. Thanks guys, Jeff

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• Can this USB3 behaviour be anything else than a hardware failure?

  - by Jonas Wielicki

  While my motherboard is half a year old now (ASUS M5A99X EVO), I only recently made use of the USB3 boards (after purchase of USB3 external harddrive). However, I am encountering issues. I am running linux 3.6.7-4.fc16.x86_64. Initially, the harddrive worked fine with USB3 (amazing ˜160MB/s), but I had some problems after putting after putting the harddrive to sleep manually after use (backup) with hdparm -Y. After some time, the device disappears from lsusb and i see the following in dmesg: [ 1924.091107] xhci_hcd 0000:05:00.0: xHCI host not responding to stop endpoint command. [ 1924.091114] xhci_hcd 0000:05:00.0: Assuming host is dying, halting host. [ 1924.091147] xhci_hcd 0000:05:00.0: HC died; cleaning up [ 1924.091233] usb 11-1: USB disconnect, device number 2 [ 1924.091272] sd 6:0:0:0: Device offlined - not ready after error recovery Testing with my (USB3 capable) notebook, I could not immediately reproduce the behaivour. I put the drive to sleep with hdparm -Y and waited for like an hour, but it was still listed in lsusb and responded after a few seconds delay when I tried after the hour of waiting. After an hour, on the desktop, the device would've usually vanished. Googling for this issue, I came across hints that playing around with IOMMU settings and upgrading the BIOS might help. I upgraded the BIOS and tried both with and without IOMMU enabled, got similar results. Most disturbing is, that one of the two USB 3.0 hubs sometimes also disappears from lsusb (or does not show up after boot at all). I've also heard that there are some hardware issues with ASUS USB3 ports. Applying mechanic force to the capble doesn't push the issue to one side or the other. Also, udev seems to reenumerate all devices if I plug the HDD into the USB 3.0 port without success (I can notice from my keyboard layout being changed to the default, which I do not use normally). The drive is externally powered and the external power supply is plugged in (it also stays powered when unplugging from USB, although it will spin down then). So before I try to return the board, I wanted to find out whether this can be anything else than a failure on the motherboard?

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• MySQL won't start, reinstall fails on Ubuntu 12.04

  - by Evils

  My problem started yesterday night when I tried to change the my.cnf config on my ubuntu 12.04 x64 System. I simply tried to changed the bind-address parameter from 127.0.0.1 to 0.0.0.0. A simple restart after a reboot gave this error: stop: Unknown instance: start: Job failed to start I tried to start mysql then by using 'mysqld' which outputs this: 130701 11:05:59 [Note] Plugin 'FEDERATED' is disabled. mysqld: Table 'mysql.plugin' doesn't exist 130701 11:05:59 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it. 130701 11:05:59 InnoDB: The InnoDB memory heap is disabled 130701 11:05:59 InnoDB: Mutexes and rw_locks use GCC atomic builtins 130701 11:05:59 InnoDB: Compressed tables use zlib 1.2.3.4 130701 11:05:59 InnoDB: Initializing buffer pool, size = 128.0M 130701 11:05:59 InnoDB: Completed initialization of buffer pool 130701 11:05:59 InnoDB: highest supported file format is Barracuda. 130701 11:05:59 InnoDB: Waiting for the background threads to start 130701 11:06:00 InnoDB: 5.5.31 started; log sequence number 1595675 130701 11:06:00 [Note] Server hostname (bind-address): '127.0.0.1'; port: 3306 130701 11:06:00 [Note] - '127.0.0.1' resolves to '127.0.0.1'; 130701 11:06:00 [Note] Server socket created on IP: '127.0.0.1'. 130701 11:06:00 [ERROR] Can't start server : Bind on unix socket: Permission denied 130701 11:06:00 [ERROR] Do you already have another mysqld server running on socket: /var/run/mysqld/mysqld.sock ? 130701 11:06:00 [ERROR] Aborting 130701 11:06:00 InnoDB: Starting shutdown... 130701 11:06:00 InnoDB: Shutdown completed; log sequence number 1595675 130701 11:06:00 [Note] mysqld: Shutdown complete Meanwhile I already tried to reinstall and purge the complete mysql package which results in another error which says that dpkg cant change the admins password. While this error appeared another error came with it. When trying to install something new with apt, it always says 'fopen: permission denied' right after it tries to update my man-db. This is my dmesg output: [ 6879.687998] type=1400 audit(1372669683.397:36): apparmor="STATUS" operation="profile_replace" name="/usr/sbin/mysqld" pid=9336 comm="apparmor_parser" [ 6881.323215] init: mysql main process (9340) terminated with status 1 [ 6881.323316] init: mysql respawning too fast, stopped Any help will be appreciated as this is a productive server which renders useless without mysql.

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• Caching issue with Centos forwarding DNS server

  - by Paddington

  I installed a Forwarding DNS server on Centos 5.10 and it is resolving addresses e.g google.com. When I stopped named (service named stop) and tried to dig (dig @localhost A google.com) there was a failure to resolve the address. I checked and see the caching daemon nscd is running. Does this mean the server is not caching at all? How can I get it to cache? named.conf options { // Those options should be used carefully because they disable port // randomization // query-source port 53; // query-source-v6 port 53; // Put files that named is allowed to write in the data/ directory: listen-on port 53 {127.0.0.1; 10.0.0.4;}; directory "/var/named"; // the default dump-file "/var/named/chroot/var/named/data/cache_dump.db"; statistics-file "/var/named/chroot/var/named/data/named_stats.txt"; memstatistics-file "/var/named/chroot/var/named/data/named_mem_stats.txt"; // allow-query {localhost; 192.168.0.0/24; 10.0.0.0/8;}; recursion yes; //allow-query { localhost; 10.0.0.0/8;}; allow-query { localhost; any; }; allow-query-cache { localhost; any; }; forward only; forwarders {8.8.8.8; 8.8.4.4;}; dnssec-enable yes; // dnssec-lookaside auto; /* Path to ISC DLV key */ // bindkeys-file "/etc/named.iscdlv.key"; // managed-keys-directory "/var/named/dynamic"; }; logging { channel default_debug { file "data/named.run"; severity dynamic; }; }; **

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• Apache certificates for some urls not working

  - by Vegaasen

  We are having a rather strange problem with a Apache-installation. Here is a short summary: Currently I'm setting up Apache with https, and server-certificates. This is fairly easy and works straight out of the box - as expected. This is the configuration for this setup: Listen 443 SSLEngine on SSLCertificateFile "/progs/apache/ssl/example-site.no.pem" SSLCertificateKeyFile "/progs/apache/ssl/example-site.no.key" SSLCACertificateFile "/progs/apache/ssl/ca/example_root.pem" SSLCADNRequestFile "/progs/apache/ssl/ca/example_intermediate.pem" SSLVerifyClient none SSLVerifyDepth 3 SSLOptions +StdEnvVars +ExportCertData RequestHeader set ssl-ClientCert-Subject-CN "%{SSL_CLIENT_S_DN}s" RewriteEngine On ProxyPreserveHost On ProxyRequests On SSLProxyEngine On ... <LocationMatch /secureStuff/$> SSLVerifyClient require Order deny,allow Allow from All </LocationMatch> ... <Proxy balancer://exBalancer> Header add Set-Cookie "EX_ROUTE=EB.%{BALANCER_WORKER_ROUTE}e; path=/" env=BALANCER_ROUTE_CHANGED BalancerMember http://10.0.0.1:7200 route=ee1 retry=300 flushpackets=off keepalive=on BalancerMember http://10.0.0.2:7200 route=ee2 retry=300 flushpackets=off keepalive=on status=+H ProxySet stickysession=EX_ROUTE scolonpathdelim=Off timeout=10 nofailover=off failonstatus=505 maxattempts=1 lbmethod=bybusyness Order deny,allow Allow from all </Proxy> RewriteCond %{REQUEST_URI} !^/index.html [NC] RewriteRule ^/(.*)$ balancer://exBalancer/$1 [P,NC] ProxyPassReverse / balancer://exBalancer/ Header edit Set-Cookie "(.*)" "$1;HttpsOnly" ... So - everything works fine and as expected for all of the pages that are not a part of the LocationMatch-directive. When requesting something that matches the LocationMatch-directive, I'm asked for a certificate (hence the SSLVerifyClient required attribute) - and getting all the correct certificates in my browser that is based on the root/intermediate chain. After choosing a certificate and clicking "OK", this is what pops up in the apache logs: [ssl:info] [pid 9530:tid 25] [client :43357] AH01998: Connection closed to child 86 with abortive shutdown ( [Thu Oct 11 09:27:36.221876 2012] [ssl:debug] [pid 9530:tid 25] ssl_engine_io.c(1171): (70014)End of file found: [client 10.235.128.55:45846] AH02007: SSL handshake interrupted by system [Hint: Stop button pressed in browser?!] And this just spams the logs. What is happening here? I can see this configuration working on my local machine, but not on one of our servers. There is no configration differences between the servers, only minor application-wise-changes. I've tried the following: 1) Removing CA-certificate-checking (works) 2) Adding required CA-certificate for the whole site (works) 3) Adding "SSLVerifyClient optional" does not work 4) ++ Server/Application Information Local: -OpenSSL v.1.0.1x -Apache 2.4.3 -Ubuntu -mpm: event -every configuration should be turned on (failing) server: -OpenSSL 0.9.8e -Apache 2.4.2 -SunOS -mpm: worker -every configuration should be turned on Please let me know if more information is needed, I'll provide it instantly. Brief sum-up: -Running apache 2.4 -Server certificates works just fine -Client certificates for some /Locations does not work, fails with errors PS: Could it be related with the OpenSSL version and the "Renegotiation" stuff related to TLS/SSLv3?

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• Cooling Server Rack with Water? Sensible? Reuse energy for small installation?

  - by TomTom

  First - this is not a shopping question, this is not so much about concrete prices but about general feasibility. Makes no sense to get looking fo ra manufacturer it the approach is bad. I am moving my company to new Offices in September, and among them we will expand and consolidate our number crunch cluster. It is so far in a data center. I have a nice room in the basement prepared now. I think about cooling. We will likely run up a power usage of around 10kw by end of the year. That is a LOT of stuff, and cooling will be expensive. I am located in south Poland, close to the German border. This is an area where water is available for relatively cheap price - "wasting water" is not a concern here. My situation is thus a lot different for example than in Spain ;) Physics tells me that to heat 1 liter of water by 1 degree I use 1 Calorie (1KCal), and a kwh power is (and we can assume 100% efficiency - water heaters are pretty efficient) 750 Calories. That means that 1 KWH is 750 liter by 1 degree. 10kw and a 20 degree heat would mean that per hour I need 375 liters. That is 6.25 liters per minute and not WHAT much ;) We talk 270 cubic meters here. Even in summer, the significant underground pipes really cool down the water a LOT more ;) Question: This such an approach feasible? Anyone done that? We talk of a 10kw installation for now. Is it feasible to reuse that heat? The alternative is a decent cooling system that WILL use around 2.5kwh for running. Dropping the water would basically (a) get me a quite cold input compared to the outside air even in summer (I.e. a lower temperature medium to drop the heat in) and (b) replace the need to actually have the outside cooling (which may b problematic - if the air is 22 degree, that is a LOT to fight off, but OTOH the water will be quite cold). I also would possibly save the investment for the outside part of the cooling circuit. Now, second question - is there a feasible way to heat a house with that? ;) After all, brutally speaking, it is a LOT of energy in that water ;) If it is a bad idea, I stop here - if it is not, I start looking for suppliers. Maybe my math is wrong?

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• Why is BIND giving me a SERVFAIL in this case? (Notes inside)

  - by imaginative

  Woke up this morning to a bunch of the following: root@foo:/etc/bind# dig @1.2.3.4 foo.example.com ; <<>> DiG 9.6.1-P2 <<>> @1.2.3.4 foo.example.com ; (1 server found) ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 36121 ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;;foo.example.com. IN A ;; Query time: 0 msec ;; SERVER: 1.2.3.4#53(1.2.3.4) ;; WHEN: Thu Apr 1 09:57:59 2010 ;; MSG SIZE rcvd: 31 Some background on the fictitious "1.2.3.4". It's a slave name server in my nameserver "farm". Technically I have ns1 (being the master) and ns2/ns3. Currently ns1/ns2 are down for maintenance, so I left ns3 at it serving live traffic. That's the point, DNS is supposed to be resilient. Now the odd part is, "1.2.3.4" was serving requests for example.com just fine for the last 4-5 days. This morning I get a phone call that it's non-responsive. After investigation I see the message you see above, SERVFAIL. I looked into the zone file and saw the following: example.com IN SOA ns1.example.com. hostmaster.mail.example.com. ( I wondered if at this point that the nameserver thought it was not authoritative over example.com and adjusted it to the following: example.com IN SOA ns3.example.com. hostmaster.mail.example.com. ( After that, it started responding again for all authoritative queries for example.com. I have no idea why. I thought these things were supposed to be normalized upon zone transfer from ns1 - ns3? Can someone please example why this happened and how to prevent it from happening in the future? I've never had a similar problem, and because I don't understand it well, I might be missing some critical information in this question. So please let me know if I can further add any detail to make things clearer as well. One more thing to note: I have other domains that I'm authoritative for that have their SOA still saying ns1.example.com. and not ns3.example.com. Those domains are serving requests just fine! Is it a matter of time before they stop also and I have to change SOA to ns3.example.com? Is this also only required because ns1 and ns2 are currently offline?

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• Nginx reverse proxy with separate aliases

  - by gabeDel

  Interesting question I have this python code: import sys, bottle, gevent from bottle import * from gevent import * from gevent.wsgi import WSGIServer @route("/") def index(): yield "/" application=bottle.default_app() WSGIServer(('', port), application, spawn=None).serve_forever() that runs standalone with nignx infront of it as a reverse proxy. Now each of these pieces of code run separately but I run multiple of these per domain per project(directory) but the code thinks for some reason that it is top level and its not so when you go to mydomain.com/something it works but if you go to mydomain.com/something/ you will get an error. No I have tested and figured out that nginx is stripping the "something" from the request/query so that when you go to mydomain.com/something/ the code thinks you are going to mydomain.com// how do I get nginx to stop removing this information? Nginx site code: upstream mydomain { server 127.0.0.1:10100 max_fails=5 fail_timeout=10s; } upstream subdirectory { server 127.0.0.1:10199 max_fails=5 fail_timeout=10s; } server { listen 80; server_name mydomain.com; access_log /var/log/nginx/access.log; location /sub { proxy_pass http://subdirectory/; proxy_redirect off; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_max_temp_file_size 0; client_max_body_size 10m; client_body_buffer_size 128k; proxy_connect_timeout 90; proxy_send_timeout 90; proxy_read_timeout 90; proxy_buffer_size 4k; proxy_buffers 4 32k; proxy_busy_buffers_size 64k; proxy_temp_file_write_size 64k; } location /subdir { proxy_pass http://subdirectory/; proxy_redirect off; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_max_temp_file_size 0; client_max_body_size 10m; client_body_buffer_size 128k; proxy_connect_timeout 90; proxy_send_timeout 90; proxy_read_timeout 90; proxy_buffer_size 4k; proxy_buffers 4 32k; proxy_busy_buffers_size 64k; proxy_temp_file_write_size 64k; } }

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• Restarting or stopping apache results in waiting forever

  - by steko

  I have two simple WSGI apps running on top of mod_wsgi and apache2 on a test development server. There is no mod_python on this machine. The WSGI configuration is as follows WSGIDaemonProcess tops stack-size=524288 maximum-requests=5 WSGIScriptAlias /tops /home/ubuntu/tops-cloud/tops.wsgi <Directory /home/ubuntu/tops-cloud> WSGIProcessGroup tops WSGIApplicationGroup %{GLOBAL} Order deny,allow Allow from all </Directory> WSGIDaemonProcess flaskal maximum-requests=5 WSGIScriptAlias /c14 /home/ubuntu/c14/flaskal/flaskal.wsgi <Directory /home/ubuntu/c14/flaskal> WSGIProcessGroup flaskal WSGIApplicationGroup %{GLOBAL} Order deny,allow Allow from all </Directory> If I make changes to the app, I need to restart the web server, so I would expect that a simple sudo service apache2 restart does what I need. Same goes for any changes to the config (e.g. number of maximum requests, etc). Instead, it never ends "waiting", like this: $ sudo service apache2 restart * Restarting web server apache2 ... waiting .................................................. until I just do CTRL-C. At that point, the only way to resume a working server is to kill the process and restart it, not very convenient. The same happens with the stop command. The error logs at the "debug" level show the following lines after a failed restart [Wed Nov 14 21:55:19 2012] [notice] caught SIGTERM, shutting down [Wed Nov 14 21:55:19 2012] [info] mod_wsgi (pid=9047): Shutdown requested 'tops'. [Wed Nov 14 21:55:19 2012] [info] mod_wsgi (pid=9047): Stopping process 'tops'. [Wed Nov 14 21:55:19 2012] [info] mod_wsgi (pid=9047): Destroying interpreters. [Wed Nov 14 21:55:19 2012] [info] mod_wsgi (pid=9047): Cleanup interpreter ''. [Wed Nov 14 21:55:19 2012] [info] mod_wsgi (pid=9047): Terminating Python. [Wed Nov 14 21:55:19 2012] [info] mod_wsgi (pid=8920): Shutdown requested 'flaskal'. [Wed Nov 14 21:55:19 2012] [info] mod_wsgi (pid=8920): Stopping process 'flaskal'. [Wed Nov 14 21:55:19 2012] [info] mod_wsgi (pid=8920): Destroying interpreters. [Wed Nov 14 21:55:19 2012] [info] mod_wsgi (pid=8920): Cleanup interpreter ''. [Wed Nov 14 21:55:19 2012] [info] mod_wsgi (pid=8920): Terminating Python. [Wed Nov 14 21:55:19 2012] [info] mod_wsgi (pid=8920): Python has shutdown. [Wed Nov 14 21:55:19 2012] [info] mod_wsgi (pid=9047): Python has shutdown. If I then try to restart again (with the process still running), I get the following error: * Restarting web server apache2 (98)Address already in use: make_sock: could not bind to address 0.0.0.0:80 no listening sockets available, shutting down Unable to open logs Action 'start' failed. The Apache error log may have more information. Unfortunately the Apache error log doesn't have anything. When apache2 is running properly, both apps work without any problem.

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• Serving protected files using Nginx's X-Accel-Redirect header

  - by andybak

  I'm trying to serve protected files using this directive in my nginx.conf: location /secure/ { internal; alias /home/ldr/webapps/nginx/app/secure/; } I'm passing in paths in the form: "/myfile.doc" and the file's path would be: /home/ldr/webapps/nginx/app/secure/myfile.doc I just get 404's when I access "http: //myserver/secure/myfile.doc" (space inserted after http to stop ServerFault converting it to a link) I've tried taking the trailing / off the location directive and that makes no difference. Two questions: How do I fix it! How can I debug problems like this myself? How can I get Nginx to report which path it's looking for? error.log shows nothing and access.log just tells me which url is being requested - this is the bit I already know! It's no fun trying things randomly without any feedback. Here's my entire nginx.conf: daemon off; worker_processes 2; events { worker_connections 1024; } http { include mime.types; default_type application/octet-stream; server { listen 21534; server_name my.server.com; client_max_body_size 5m; location /media/ { alias /home/ldr/webapps/nginx/app/media/; } location / { proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; fastcgi_pass unix:/home/ldr/webapps/nginx/app/myproject/django.sock; fastcgi_pass_header Authorization; fastcgi_hide_header X-Accel-Redirect; fastcgi_hide_header X-Sendfile; fastcgi_intercept_errors off; include fastcgi_params; } location /secure { internal; alias /home/ldr/webapps/nginx/app/secure/; } } } EDIT: I'm trying some of the suggestions here So I've tried: location /secure/ { internal; alias /home/ldr/webapps/nginx/app/; } both with and without the trailing slash on location. I've also tried moving this block before the "location /" directive. The page I linked to has ^~ after 'location' giving: location ^~ /secure/ { ...etc... Not sure what that signifies but it didn't work either!

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• TrueCrypt partition will no longer mount

  - by sparkyuiop

  I am hoping for some advice to help me out of my situation, with luck. I have a computer running Windows 7 Ultimate x64 with 3 hard disks installed. On my 2TB hard disk 2 (non-system disk) I have 4 partitions. One is for music, another for video, a downloads partition and a 500GB RAW Truecrypt encrypted partition / volume that I had setup to mount with 4 photographs used as keyfiles. The 4 photographs are located in my 'Documents' partition which is one of four partitions on my 1.5TB hard disk 1 (non-system disk) When I setup the disk encryption I did not (I'm 99% sure) create a password, I only used the 4 photograph keyfiles to mount the volume. Recently my 1TB hard disk 0 (system / boot) started to fail so I decided to replace it. I was going to clone the old disk to a new disk but decided that a fresh installation would be more beneficial. Once I had transferred all the required 'User Data' from my old hard disk 0 (C: disk) I discarded it. I reinstalled Truecrypt, pointed to the partition, selected my 4 keyfiles photographs and I mounted my encrypted volume with no issues. In fact I mounted it several times after re-installing Windows and after reboots. Now all of a sudden when I try and mount it I get the message "incorrect keyfile(s) and/or password or not a Truecrypt volume". Now I am not sure why this happened as I do not recall exactly what I did between last mounting the volume successfully and it not mounting. Here are some of the possible things I may have done to cause it to stop working but I am at a loss as to where to start to try and resolve the problem. 1. I had swapped the drive letters to a preferred order. 2. I possibly swapped the physical SATA connectors on the mainboard. 3. I enabled 'Hot Plugging' for the two non-system hard disk SATA ports and the DVD SATA port in the BIOS. I have tried changing the encrypted partition drive letter as suggested in another post but this does not help. On my old system the encrypted drive was drive "X". I have about tried it with all the other free drive letters but alas nothing changes. I do not recall what drive letter was allocated to the encrypted partition before I changed them all. I have not tried to change the letter back to what it possibly was to start with as I am happy with the current layout. I will try this is anyone thinks it would be worthwhile though. I do hope I have managed to convey my situation in an understandable manner and live in hope someone could help me recover years of personal files. Thank you very much for taking the time to read my post and for any suggestions you may offer. Regards Phillip Thorne (UK) Anyone???

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• Synergy 1.5 crash (OSX 10.6.8)

  - by Oliver

  THANKS FOR TAKING THE TIME TO READ THIS I recently installed Synergy 1.5 r2278 (for Mac OSX 10.6.8) and was using it fine for most of the day, then it decided to stop working (the only thing I changed systemwise was the screensaver - and then after it started crashing disabled it - to see if it would resolve). When I start Synergy (on the Mac - Client) it says: after about 5 seconds (and successfully connecting to the Server) "synergyc quit unexpectedly" Here is the crash log (w/ binery info removed - too long for post requirements) Process: synergyc [1026] Path: /Applications/Synergy.app/Contents/MacOS/synergyc Identifier: synergy Version: ??? (???) Code Type: X86 (Native) Parent Process: Synergy [1023] Date/Time: 2014-05-28 15:36:17.746 +0930 OS Version: Mac OS X 10.6.8 (10K549) Report Version: 6 Interval Since Last Report: 2144189 sec Crashes Since Last Report: 23 Per-App Interval Since Last Report: 10242 sec Per-App Crashes Since Last Report: 9 Anonymous UUID: 86D5A57C-13D4-470E-AC72-48ACDDDE5EB0 Exception Type: EXC_CRASH (SIGABRT) Exception Codes: 0x0000000000000000, 0x0000000000000000 Crashed Thread: 5 Application Specific Information: abort() called Thread 0: Dispatch queue: com.apple.main-thread 0 libSystem.B.dylib 0x95cf3afa mach_msg_trap + 10 1 libSystem.B.dylib 0x95cf4267 mach_msg + 68 2 com.apple.CoreFoundation 0x95af02df __CFRunLoopRun + 2079 3 com.apple.CoreFoundation 0x95aef3c4 CFRunLoopRunSpecific + 452 4 com.apple.CoreFoundation 0x95aef1f1 CFRunLoopRunInMode + 97 5 com.apple.HIToolbox 0x93654e04 RunCurrentEventLoopInMode + 392 6 com.apple.HIToolbox 0x93654bb9 ReceiveNextEventCommon + 354 7 com.apple.HIToolbox 0x937dd137 ReceiveNextEvent + 83 8 synergyc 0x000356d0 COSXEventQueueBuffer::waitForEvent(double) + 48 9 synergyc 0x00010dd5 CEventQueue::getEvent(CEvent&, double) + 325 10 synergyc 0x00011fb0 CEventQueue::loop() + 272 11 synergyc 0x00044eb6 CClientApp::mainLoop() + 134 12 synergyc 0x0005c509 standardStartupStatic(int, char**) + 41 13 synergyc 0x000448a9 CClientApp::runInner(int, char**, ILogOutputter*, int (*)(int, char**)) + 137 14 synergyc 0x0005c4b0 CAppUtilUnix::run(int, char**) + 64 15 synergyc 0x000427df CApp::run(int, char**) + 63 16 synergyc 0x00006e65 main + 117 17 synergyc 0x00006dd9 start + 53 Thread 1: 0 libSystem.B.dylib 0x95d607da __sigwait + 10 1 libSystem.B.dylib 0x95d607b6 sigwait$UNIX2003 + 71 2 synergyc 0x00009583 CArchMultithreadPosix::threadSignalHandler(void*) + 67 3 libSystem.B.dylib 0x95d21259 _pthread_start + 345 4 libSystem.B.dylib 0x95d210de thread_start + 34 Thread 2: 0 libSystem.B.dylib 0x95d21aa2 __semwait_signal + 10 1 libSystem.B.dylib 0x95d2175e _pthread_cond_wait + 1191 2 libSystem.B.dylib 0x95d212b1 pthread_cond_timedwait$UNIX2003 + 72 3 synergyc 0x00009476 CArchMultithreadPosix::waitCondVar(CArchCondImpl*, CArchMutexImpl*, double) + 150 4 synergyc 0x0002b18f CCondVarBase::wait(double) const + 63 5 synergyc 0x0002ce68 CSocketMultiplexer::serviceThread(void*) + 136 6 synergyc 0x0002d698 TMethodJob<CSocketMultiplexer>::run() + 40 7 synergyc 0x0002b8f4 CThread::threadFunc(void*) + 132 8 synergyc 0x00008f30 CArchMultithreadPosix::doThreadFunc(CArchThreadImpl*) + 80 9 synergyc 0x0000902a CArchMultithreadPosix::threadFunc(void*) + 74 10 libSystem.B.dylib 0x95d21259 _pthread_start + 345 11 libSystem.B.dylib 0x95d210de thread_start + 34 Thread 3: Dispatch queue: com.apple.libdispatch-manager 0 libSystem.B.dylib 0x95d1a382 kevent + 10 1 libSystem.B.dylib 0x95d1aa9c _dispatch_mgr_invoke + 215 2 libSystem.B.dylib 0x95d19f59 _dispatch_queue_invoke + 163 3 libSystem.B.dylib 0x95d19cfe _dispatch_worker_thread2 + 240 4 libSystem.B.dylib 0x95d19781 _pthread_wqthread + 390 5 libSystem.B.dylib 0x95d195c6 start_wqthread + 30 Thread 4: 0 libSystem.B.dylib 0x95d19412 __workq_kernreturn + 10 1 libSystem.B.dylib 0x95d199a8 _pthread_wqthread + 941 2 libSystem.B.dylib 0x95d195c6 start_wqthread + 30 Thread 5 Crashed: 0 libSystem.B.dylib 0x95d610ee __semwait_signal_nocancel + 10 1 libSystem.B.dylib 0x95d60fd2 nanosleep$NOCANCEL$UNIX2003 + 166 2 libSystem.B.dylib 0x95ddbfb2 usleep$NOCANCEL$UNIX2003 + 61 3 libSystem.B.dylib 0x95dfd6f0 abort + 105 4 libSystem.B.dylib 0x95d79b1b _Unwind_Resume + 59 5 synergyc 0x00008fd1 CArchMultithreadPosix::doThreadFunc(CArchThreadImpl*) + 241 6 synergyc 0x0000902a CArchMultithreadPosix::threadFunc(void*) + 74 7 libSystem.B.dylib 0x95d21259 _pthread_start + 345 8 libSystem.B.dylib 0x95d210de thread_start + 34 Thread 5 crashed with X86 Thread State (32-bit): eax: 0x0000003c ebx: 0x95d60f39 ecx: 0xb0288a7c edx: 0x95d610ee edi: 0x00521950 esi: 0xb0288ad8 ebp: 0xb0288ab8 esp: 0xb0288a7c ss: 0x0000001f efl: 0x00000247 eip: 0x95d610ee cs: 0x00000007 ds: 0x0000001f es: 0x0000001f fs: 0x0000001f gs: 0x00000037 cr2: 0x002fe000 Model: MacBook2,1, BootROM MB21.00A5.B07, 2 processors, Intel Core 2 Duo, 2.16 GHz, 2 GB

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• Windows 7 booting and startup repair issues

  - by aardvark

  I have a MSI FR720 laptop with Windows 7 and Lubuntu partions. For quite a while (6 months or so) I've been having issues booting from my hard drive, it'd take me between 5 minutes and several hours for me to be able to have it recognize the hard drive as a bootable device. I did several disk checks on it, and my hard drive seems in perfect condition, and the fact that booting would usually only work after removing the hard drive and trying to reset it in its slot or lightly shaking it makes me think it had something to do with the connection in the hard drive slot as opposed to the hard drive itself. I was having particular issues with it detecting the hard drive today so I decided to try booting it from an external hard drive dock. It detected it first try and so far has had no problems finding the bootable partitions on my hard drive. When I selected my Windows 7 partition from the boot menu it said that it hadn't been shut down properly last time and needed startup repair. I've done this several times over the last 6 months, so this is hardly unusual. I do startup repair, it fails, and then I try to do a system restore. The system restore also failed, and it says that no files were changed. I restart and try it again. However, this time when I get to the startup repair it's not detecting a Windows OS. I tried clicking next and doing a startup repair but the repair is always failing. If I ignore the startup repair option and instead select "Launch windows normally" it will get to the windows animation, stop halfway through and then crash into a BSoD. I can't read the error on the screen because it immediately switches to back and tries to restart. This is my first time asking a question like this online, so let me know if I need to provide any extra information and I'll do my best to give it I tried using diskpart to find the list of partitions and see if one's labelled as an active partition, but it says that no disk were detected. I can run Lubuntu just fine. I can also see all of my Windows 7 files from it EDIT: The startup repair diagnosis and repair log is this: -- Number of repair attempts: 1 Session details System Disk = Windows directory = AutoChk Run = 0 Number of root causes = 1 Test Performed: Name: Check for updates Result: Completed successfully. Error code = 0x0 Time taken = 15ms Test Performed: Name: System disk test Result: Completed successfully. Error code = 0x0 Time taken = 31ms Root cause found. If a hard disk is installed, it is not responding. -- Any chance that this is a result of me doing this through an external dock through a USB drive?

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• Remote Debian System Preventing Logon

  - by choobablue

  I have a dozen or so single board computers on a network running Debian (squeeze) and access them via ssh (ssh server is dropbear). To give an idea of the hardware of these computers they're 1.2 GHz x86 processors, 1GB of RAM and 4GB flash drives formatted as ext2 (I avoided ext3 to prevent the added flash write stress from journaling), there is also a swap partition on the drive. Normally the setup I'm using works great and I can access all the computers. Every once in a while one will prevent access. What happens is I try to connect via ssh (putty) and it gives me the login prompt, I enter the username and password and it responds 'Access Denied' and it will also refuse any public key in ~/.ssh/authorized_keys. The credentials are correct as they worked previously. The computer responds to pings and putty recognizes the server public key, which implies to me the system is still running. Restarting the server fixes the problem and I can log in again. (I tried a temporary fix of putting shutdown -r now in the root crontab but this doesn't seem to reliably be run once the hang happens) Once I restart however there doesn't seem to be any information in any of the system logs to indicate what happened, the logs are simply empty for that time period, as if the system had crashed. There is some custom software running on the system which appears to stop working (which is why I wanted to ssh to begin with). I'm assuming that this program is the source of the problems but I'm unsure of how it would cause it and how to debug what is happening. The most likely explanation I can think of is that there is a memory leak in the other program that then prevents dropbear from spawning a new login shell (and crontab from executing shutdown) as there is not enough free memory. But looking at memory usage of the other (working) computers there doesn't seem to be any meaningful increase in memory to indicate a leak (unless it's a very big, fast acting and rare leak). I would think that when the OS ran out of memory it would restart the system or kill processes (the Linux kernel restarts right?). The other thing I wonder about is if the fact that they are running off a flash drive could have some effect, especially the swap partition (which I think I should remove to prevent wear of the flash), but the flash drives are young (~1 month) and I don't think that wear would be a factor yet. Does anybody have an idea of what could cause these symptoms, if it could be done by a memory leak, or something else I haven't thought of. And does anybody know of a method to try to debug the problem and find out more information about what's going wrong?

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• ASP.Net MVC 2 DropDownListFor in EditorTemplate

  - by tschreck

  I have a view model that looks like this: namespace AutoForm.Models { public class ProductViewModel { [UIHint("DropDownList")] public String Category { get; set; } [ScaffoldColumn(false)] public IEnumerable<SelectListItem> CategoryList { get; set; } ... } } It has Category and CategoryList properties. The CategoryList is the source data for the Category dropdown UI element. I have an EditorTemplate that looks like this: <%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl<ProductViewModel>" %> <%@ Import Namespace="AutoForm.Models"%> <%=Html.DropDownListFor(m => m.Category , Model.CategoryList ) %> NOTE: this EditorTemplate is strongly typed to ProductViewModel My Controller is populating CategoryList property with data from a database. I cannot get the DropDownListFor template to render a drop down list with data from CategoryList. I know CategoryList is getting populated with data in the controller because I see the data when I debug and step through the controller. Here's my error message in the browser: Server Error in '/' Application. Object reference not set to an instance of an object. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.NullReferenceException: Object reference not set to an instance of an object. Source Error: Line 2: <%@ Import Namespace="AutoForm.Models"% Line 3: Line 4: <%=Html.DropDownListFor(m = m.Category, Model.CategoryList) % Source File: c:\ProjectStore\AutoForm\AutoForm\Views\Shared\EditorTemplates\DropDownList.ascx Line: 4 Any ideas? Thanks Tom As a followup, I noticed that ViewData.Model is null when I'm stepping through the code in the EditorTemplate. I have the EditorTemplate strongly typed to "ProductViewModel" which is also the type that's passed to the View in the controller. I'm perplexed as to why ViewData.Model is null even though it's getting populated in the controller before getting passed to the view.

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• Compiling program that uses libpcap on Mac OSX using iPhone 3.1.1 SDK for use on iPhone

  - by Alan

  Hey SOV users, I have a question that I'm hoping some iPhone Developers may be able to help with. I had a look at statically compiling a binary on my Mac and moving it over to the iPhone for execution. I have managed to get this bit of it working by installing the iPhone 3.1.3 SDK on my Mac and setting the architecture to the iPhone in the gcc line as follows; /Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc -I ~/Downloads/libpcap-1.1.1/pcap-compiled/ -arch armv6 -isysroot /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS2.1.sdk -o test test.c I have managed to successfully compile a "Hello World" C program and executed it on the iPhone with success. e.g. include int main() { printf("Hello, World!\n"); return(0); } This worked a charm. I am also using 'ldid' to sign the application (but only if necessary). Anyways, I have been trying to get a program to compile which uses libpcap (http://www.tcpdump.org/) but with little success. I have downloaded and installed libpcap-1.1.1 on my mac and set the configure --prefix to /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS2.1.sdk/usr/local and build the application. I then saw that the includes actually reside in Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS2.1.sdk/usr/includes and so moved the Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS2.1.sdk/usr/local/include files (which contained only the pcap stuff) to the correct location. I then attempted to compile the test program using; /Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc -I /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS3.1.3.sdk/usr/include/ -arch armv6 -isysroot /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS2.1.sdk -o pcap pcap.c -lpcap This worked a lot better than other tests but produces an error; i.e. ld: library not found for -lcrt1.o collect2: ld returned 1 exit status Do you have any ideas as to how I can do this successfully? I've tried a load of different things but none seem to be successful. Basically, I just want to install (or add) some headers to the existing iPhoneOS SDK for use in compiling programs. Any ideas? Cheers, A

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