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• MS SQL Error: Primary file group is full

  - by aximili

  I have a very large table in my database and I am starting to get this error Could not allocate a new page for database 'mydatabase' because of insufficient disk space in filegroup 'PRIMARY'. Create the necessary space by dropping objects in the filegroup, adding additional files to the filegroup, or setting autogrowth on for existing files in the filegroup. How do you fix this error? I don't understand the suggestions there.

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• bash and arithmetic comparison: double quotes or not?

  - by Martin

  when comparing two integers in bash, do we have to put double quotes ? In the official document http://tldp.org/LDP/abs/html/comparison-ops.html I can read that double quotes should appear every time... But what is the differences in the following examples: [ "$VAR" -eq "1" ] [ $VAR -eq "1" ] [ "$VAR" -eq 1 ] [ $VAR -eq 1 ] As I am curious, a took a look at Ubuntu init scripts in /etc/init.d and there are many usage of arithmetic comparison in it, at least [ "$VAR" -eq "1" ] and [ $VAR -eq 1 ] are used... but it seems no one really "knows" what is the official way to do it. Thanks !

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• Out of sync audio video using mencoder

  - by 1ch1g0

  hi i converted a mkv (matroska) file to avi using ffmpeg: ffmpeg -i input.mkv -f mp4 -vcodec mpeg4 -sameq -r 29.97 -b 512kb -acodec ac3 -ab 128kb -vol 512 output.avi the output file plays fine using mplayer. after that, i using mencoder to insert subtitles: mencoder output.avi -o new.avi -oac pcm -ovc lavc -subfont-text-scale 3 -sub subtitle.srt however, after i play back the video "new.avi", the video and audio is out of sync. What options can i put into mencoder to sync the A/V. ? I have also tried ffmpeg -newsubtitle option but can't get it work. Any examples of usage of -newsubtitle would be greatly appreciated. thanks

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• Simple, user friendly and strong file encryption in Windows

  - by Adam Matan

  I want a colleague of mine to send me a sensitive MS-Word document via e-mail. Since Word's encryption is questionable, I would like to encrypt the file using a passphrase. Do you know of any user-friendly encryption tool that a novice user can easily use? I wouldn't like to prompt for keys or anything like this - just provide simple interface for single file encryption. EDIT: I have solved this using Putty Secure Copy, through a Linux box I have somewhere. The user downloaded scp to the same directory where the file was, and I have send him the exact scp command by mail. Nice! Another Edit I have some additions (mainly the usage of winscp and perhaps virtual machines). My detailed answer appears below, as requested in comments.

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• How can I configure Firefox to assume I have less memory?

  - by WoLpH

  Firefox has a few different settings that automatically get tuned based on the system ram. This is all great if you're running nothing besides Firefox, but when you're running half a dozen apps at the same time and they all assume that they can take a decent chunk of mem it just kills the box. Example settings: http://kb.mozillazine.org/Browser.sessionhistory.max_total_viewers http://kb.mozillazine.org/Browser.cache.memory.capacity How can I make Firefox automatically configure all these settings with the assumption that I only have 512MB of memory instead of 4GB (or whatever number, but you get the idea). I am running Ubuntu 12.04 with Firefox 14 Current workarounds: Running a Windows XP virtual machine with 512MB of ram. It actually runs smooth and takes less memory (including Windows) to run than having Firefox (or Chrome for that matter) run standalone. Install the 32 bit version of Firefox By installing the 32 bit version of firefox (apt-get install firefox:i386) the base memory usage is only about 50% of what it is with the 64 bit.

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• Slowdown after repeated hibernation in XP SP3

  - by John

  I have a Dell laptop w/dual core and 4 gigs of memory. Recently my machine has started to go off in never never land for 5 to 20 minutes at a time with a lot of hard drive churning. Eventually it comes back and everything operates properly. If I manage to have task manager up CPU usage shows no more then 3 to 5% during this process. I am on a corporate network and have very good virus protection in place. The problem seems to have increased in frequency since I let an update happen to IE8 and/or I started using hibernate more frequently. Any ideas or suggestions? TIA J

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• My Mac is slow but don't know what's slowing it down

  - by duality_

  My Mac (Macbook Pro) is sometimes slow doing basic tasks, like browsing the web or something like that. If I open Activity Monitor, I have (maybe) one program that is about 10 % CPU, others are below 1 %. My CPU usage is not full. I still have more than 2 GB of free memory (out of 5 GB). There is no heavy I/O activity like copying files. My open programs are Google Chrome (6 tabs, none of which are in some way (flash, many DOM objects, Javascript) have IMO, except maybe Gmail), Activity Monitor, Finder, Sublime Text 2 (text editor) and iTerm (terminal). What is causing the slowdown? "Slow" being: taking time to write these characters (I press the keyboard keys but there is a delay before I see them on the screen), changing tabs or programs, etc.

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• Tor Browser: how do I restart just the browser?

  - by GDR

  I'm using Tor Browser on Linux from time to time, but I close the browser because it has high memory usage, and leave Vidala running in background to help the network and relay traffic. The problem is, when I want to use Tor Browser again, I have to shut down Vidala and start it again. This takes time and has negative effect on the network. When I execute ./App/Firefox/firefox-bin, the browser starts but says it's not connected via Tor network. Any ideas how to start tor browser and make it connect to existing Vidala instance?

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• What is the best file system and allocation size for a USB flash drive?

  - by e-t172

  I'm considering using my 4 GB Kingston DataTraveler USB stick to store my Firefox and Thunderbird profiles for my laptop and desktop PCs. I want to maximize performance when using Firefox. The question is: what is the best file system and allocation size for the fastest Firefox profile operation on a USB flash drive? I'm using Windows 7 on both machines and I don't care about compatibility or the drive's lifetime. I just want to maximize performance. I could even use ext2 with the Ext2 IFS driver if that means it'll be faster. I'm assuming (perhaps I'm wrong) that putting a Firefox profile on a USB stick would be a "lots of small files" usage. In that case, it seems that NTFS would perform best, but I'm not sure. Besides I found nothing regarding the best allocation size to use. Considering that the default allocation size is designed for hard drives (which have different characteristics), I'm assuming that the default allocation size is not the best.

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• How to diagnose repeated freezing of windows 7 (comes back alive in few seconds)

  - by Akash Kava

  I installed Windows 7 in a 3 year old machine, it installed successfully, took all drivers and running great, but what happens is every 5-6 minutes it freezes for few seconds... 30 seconds to 1 minute and then comes back alive. I checked Event Viewer, nothing matching the frozen timeline. I would appriciate any help on how to detect causing service/hardware. After it comes alive, everything runs normal, I did run task manager and checked cpu usage, at time it freezes just before and after that no task took more cpu or memory, it was like idle machine. No external usb drives or no devices, on board intel desktop board with SATA HDD, SATA hdd running in absolute good mode.

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• How should I isolate computers with different roles on a network

  - by fishhead

  I work in an industrial plant and we have one network(physical wire) that us used for both office usage and for process systems. The office computers are only used for typical office needs but occasionally do connect to the process computers to obtain information from a sql server or for some other purpose. A new initiative is in the works and is rolling down hill from corporate and that is to standardize how the the computers are used at work and they would be severely locked down and only a standard set of applications will be allowed to execute. one of the requirements is to also have non office computers isolated from the company domain. our non-office computers are a mix of Man-Machine interfaces and sql-servers all running software that non standard. My question is, how can we divorce the control systems computers from the company domain but still have access to the servers from the company domain. thanks

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• How should I isolate computers with different roles on a network

  - by fishhead

  I work in an industrial plant and we have one network(physical wire) that us used for both office usage and for process systems. The office computers are only used for typical office needs but occasionally do connect to the process computers to obtain information from a sql server or for some other purpose. A new initiative is in the works and is rolling down hill from corporate and that is to standardize how the the computers are used at work and they would be severely locked down and only a standard set of applications will be allowed to execute. one of the requirements is to also have non office computers isolated from the company domain. our non-office computers are a mix of Man-Machine interfaces and sql-servers all running software that non standard. My question is, how can we divorce the control systems computers from the company domain but still have access to the servers from the company domain. thanks

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• Shared SQL Server 2008

  - by nazaf

  Hi, I have a Windows Hyper VPS plan with 1024 MB of RAM. After installing SQL Server 2008 Express, my memory usage went up to 75% without running my site yet. I know that SQL Server consumes a lot of memory, so I decided to host my DB on a shared server. Which of the following is more scalable: install my DB on my VPS, or on a shared server ? If the latter, then can you recommend me a good shared server? Thanks.

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• How to add PTR record for a /16 IP block in BIND using $GENERATE directive?

  - by yegle

  I'm trying to reverse map a block of IP using PTR record to some special name so their usage can be easily reflected by a simple nslookup. For example, here's a nslookup result: # nslookup 172.17.201.101 Server: 10.253.33.1 Address: 10.253.33.1#53 101.201.17.172.in-addr.arpa name = for.internal.use.only. And I learned that I can add PTR record for a /24 block by using $GENERATE directive $GENERATE 0-254 $.201.17.172 PTR for.internal.use.only. So here's the question: Am I doing right exposing infomation of IP address by adding PTR record? Any better idea? If the question above is YES, then how to add PTR record for a /16 IP range? I know I can write 255 lines of $GENTERATE directive but any better solution?

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• Is there a "rigorous" method for choosing a database?

  - by Andrew Martin

  I'm not experienced with NoSQL, but one person on my team is calling for its use. I believe our data and its usage isn't optimal for a NoSQL implementation. However, my understanding is based off reading various threads on various websties. I'd like to get some stronger evidence as to who's correct. My question is therefore, "Is there a technique for estimating the performance and requirements of a certain database, that I could use to confirm or modify my intuitions?". Is there, for example, a good book for calculating the performance of equivalent MongoDB/MySQL schema? Is the only really reliable option to build the whole thing and take metrics?

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• Why Matlab in screen in Linux on PuTTY terminates itself after closing PuTTY session?

  - by Karl

  I connected to a linux server with PuTTY and start a screen session, and start matlab with: matlab -nodesktop Then, I run my matlab code as usual. The code will run for hours. So to test whether screen works, I start another PuTTY session and run top. Then, I close PuTTY session with still-running Matlab (top shows Matlab at 100% CPU usage) in screen. To my surprise, my Matlab process vanished after I close the aforementioned session. I've tried this a few times, and it seems the same thing happened. screen -ls shows that my screens are there but detached. top also shows that my matlab is not there. What might be the possible cause of this? Doesn't screen normally should keep on running even I terminate my PuTTY session?

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• External USB Fingerprint Reader for Pre-boot Authentication for Dell Laptop

  - by cop1152

  My company just purchased several Dell Latitude E6500 laptops with docking stations and external monitors. These laptops have a fingerprint scanner located next to the keyboard. DOCKED users who prefer to use the included fingerprint scanner for pre-boot authentication are forced to open their laptop in order to access the scanner. This is an inconvenience when the laptop is docked. We are looking for an external, usb fingerprint scanner, that will work with the current preboot authentication setup. I assume that this scanner would have to access the existing credentials for authentication....wherever they are stored. So we would require something that would work PRE-BOOT, use the existing credentials, and not interfere with usage when the machine was not docked, such as when the laptop is being used at home. Does anyone have experience with this scenario? Thanks.

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• Windows - put HDD stand-by and sleep mode

  - by iulianchira

  How can I put a hard disk drive in stand-by or sleep mode in Windows, in a programmatic manner. Does the Windows API or any .Net libraries provide any functions to achieve this? (I am aware that I should probably not interfere with Windows's power management mechanism, but this is not something I intend to use in a production environment, it is a proof of concept for some algorithms).

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• how much more memcache memory do i need to get 95% hit ratio? [on hold]

  - by OneSolitaryNoob

  I have a memcache instance running that has a 90% hit ratio. How can I estimate how much more memory it needs to get to a 95% hit ratio? edit: This question was blocked, but I do not think this is impossible to answer. After all, anyone that's used a caching system HAS answered this question, most likely with trial&error&luck. I can look at my usage patterns. I can increase or decrease memory and see how hit rate changes. Both of these provide data that informs an estimate. But what's a good/better/best way to do this?

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• snmp trap using disman-event mib related issue

  - by jatin bodarya

  notificationEvent ifMtu.1 IF-MIB::ifMtu.1 1.3.6.1.2.1.2.2.1.4.1 monitor -I -u root -s -t -r 18 "Warn: High ipp Usage" -e ifMtu.1 1.3.6.1.2.1.2.2.1.4.1 != The above lines are in my snmpd.conf file which is generating a trap when the condition evaluates to false. My issue is that I want to send "Trap Severity Levels" with it. Is it possible? If so, how? If it isn't is there any other way to send them?

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• Shut down windows service based on load

  - by JP

  Hello, I was wondering if there are any free / open source solutions that will start and stop a windows service based on load? I have some pubsub subscriber services that do background work which is not critical. Ideally i would like tot be able to automate things so that these services could start if memory/cpu/disk i/o was under a certain threshold and stop gracefully if that threshold was met. Do you know of any solutions? Thanks JP

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• External hard drive no detected in a vista ultimate

  - by raghavendra

  Hi, I have created a partition in my external HD and later i am trying to install XP over Vista . So i have entered into my DOS prompt and i choose the DISK TYPE and i choose external DD and i tried to CLEAN it , Immediately my external HD is asked for FORMAT and i rejected it . After that i restarted my system , therefore i cannot able to see my external HD on my sysmen External HD: Seagate Free agent(500GB)

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• How to enable attachment using Apache File upload

  - by Stardust

  I am using Apache commons File upload API to Store the file from JSP to servlets in temp directory, but I don't know what should I do next to send the email as an attachment using javamail API. How can I retrieve those files which is written in temp directory using Apache Fileupload API to send them as attachment to mail Server. How will writing those files either to memory or disk will help me?

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• How To Perform Distributed Website Monitoring?

  - by cballou

  I would like to know how sites like the following perform distributed website monitoring (from multiple checkpoints/countries). pingdom.com, site24x7.com, uptrends.com, siteuptime.com, etc, etc. To be exact, what process would occur in checking if a given domain name went down? If the server finds that the site is down, what is the next step? Would it make a REST API request to a separate server to run the same test and report the results? I have a few theories, including: utilizing host(s) from different countries utilizing proxies from different countries I'm looking for the most proper or correct way to handle this, which can include the usage of servers from multiple countries/hosts.

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• Can you find a pattern to sync files knowing only dates and filenames?

  - by Robert MacLean

  Imagine if you will a operating system that had the following methods for files Create File: Creates (writes) a new file to disk. Calling this if a file exists causes a fault. Update File: Updates an existing file. Call this if a file doesn't exist causes a fault. Read File: Reads data from a file. Enumerate files: Gets all files in a folder. Files themselves in this operating system only have the following meta data: Created Time: The original date and time the file was created, by the Create File method. Modified Time: The date and time the file was last modified by the Update File method. If the file has never been modified, this will equal the Create Time. You have been given the task of writing an application which will sync the files between two directories (lets call them bill and ted) on a machine. However it is not that simple, the client has required that The application never faults (see methods above). That while the application is running the users can add and update files and those will be sync'd next time the application runs. Files can be added to either the ted or bill directories. File names cannot be altered. The application will perform one sync per time it is run. The application must be almost entirely in memory, in other words you cannot create a log of filenames and write that to disk and then check that the next time. The exception to point 6 is that you can store date and times between runs. Each date/time is associated with a key labeled A through J (so you have 10 to use) so you can compare keys between runs. There is no way to catch exceptions in the application. Answer will be accepted based on the following conditions: First answer to meet all requirements will be accepted. If there is no way to meet all requirements, the answer which ensures the smallest amount of missed changes per sync will be accepted. A bounty will be created (100 points) as soon as possible for the prize. The winner will be selected one day before the bounty ends. Please ask questions in the comments and I will gladly update and refine the question on those.

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