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• Optimal dir strcuture for keeping millions of files on an ext4 system

  - by Alex Flo

  I need to keep millions of files on an ext4 system. I understand that having a structure with multiple subdirectories is the general accepted solution. I wonder what would be the optimal approach in terms of number of dirs/subdirs. For example I tried a structure like 16/16/16/16 (that is, (sub)directories from 1 to 16) and I found that I am able to move 100K files to this structure in 2m50s. When trying to move 100K files to a 8/8/8/8/8/8 structure it took 11 minutes. So the 16/16/16/16 approach seems to be better but I was wondering if anyone has some empirical experience with an even better dir/subdir distribution.

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• DOS Batch file to find "new" files by date

  - by Todd McArthur

  My PC has entered an infinite BSOD loop - but I do have access to a safe-mode command prompt. I'm trying to get an idea of "what changed" that might have triggered this. e.g. I might have gotten a virus, or an app update went belly up. I'd like to thus see which files were created/modified in the last few days/week or at least the *.exe, *.dll, *.com, *.bat etc. I thought I was ok with my Batch-fu but I'm stumped on how to write a quick batch file/command that would list the files for me. REM This will find the files, but the results are all muddled REM all EXE files, reverse sort by date, recursively through sub-directories dir *.exe /O-D /S What I'd really like is to find all (executable filetypes) that were created/modified in the last 3-7 days. Can anyone point me in the right direction?

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• invalid conversion from 'char' to 'int* in C

  - by majdal

  Hi, I have the following arrays: int A[] = {0,1,1,1,1, 1,0,1,0,0, 0,1,1,1,1}; int B[] = {1,1,1,1,1, 1,0,1,0,1, 0,1,0,1,0}; int C[] = {0,1,1,1,0, 1,0,0,0,1, 1,0,0,0,1}; //etc... for all letters of the alphabet And a function that prints the letters on a 5x3 LED matrix: void printLetter(int letter[]) I have a string of letters: char word[] = "STACKOVERFLOW"; and I want to pass each character of the string to the printLetter function. I tried: int n = sizeof(word); for (int i = 0; i < n-1; i++) { printLetter(word[i]); } But I get the following error: invalid conversion from 'char' to 'int*' What should i be doing? Thanks!!

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• Windows 2003-R2-Server: Process "System" takes large chunks of CPU time

  - by Dabu

  I have a domain controller running 2003 R2. The server behaves very well when restarted daily, however, each day it is not restarted, there's a process called "System" that takes enourmous chunks of CPU time (up to 95%). The server supports AD, WINS, DNS, has Kaspersky Endpoint Security running, and manages backups via Arcserve 15. When I tried so far: Process Explorer (ex-Sysinternals) shows that the "System" process has no sub-processes. In the "Threads" tab of the detailled view I can see that 90% of the CPU time is used up by "ntkrnlpa.exe+0x803c0". The "Interrupts" process is running at 3-5% of CPU time, I'm not sure if this accounts for the amount of CPU time that System takes.

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• always true rewritecond

  - by Matt

  My university provides a public_html file in each student's Linux directory so tat each student can have a webpage. I want to put all my PHP scripts into that file and place the index in a sub-directory called webroot. I'm trying to work out a way to have an .htaccess file in the public_html that will redirect ALL requests in that folder to be redirected. There's lots of advice on redirecting any file that doesn't exists but I want to redirect regardless of the existence of a file. Can I use something like RewriteCond TRUE?

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• Extract part of a image from a big image

  - by rajat

  I have a 6 images , and each image has a certain section that i want to save as a separate image , the problem is that it has to be accurate because i am doing some animation using the sub-image so they should exactly . so I want to accurately extract a that part from each of the 6 images , i can't do it using a image editor in which i have to make the bounding box myself because it will not be accurate , is there any program that lets me do this by like defining a box using numerical values. PS: I don't want to write matlab or opencv program for this .

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• Ubuntu can't install an older version of a package

  - by Trevor Newhook

  When I try to do an apt-get install, I keep getting an error: Depends: libgtk-3-common (= 3.4.1-0ubuntu1) but 3.4.2-0ubuntu0.4 is to be installed when I run sudo apt-get -f install, I get several dpkg: warning: files list file for package 'XXX' missing, assuming package has no files currently installed. then Preparing to replace libgtk-3-bin 3.4.1-0ubuntu1 (using .../libgtk-3-bin_3.4.2-0ubuntu0.4_i386.deb) ... Adding 'diversion of /usr/sbin/update-icon-caches to /usr/sbin/update-icon-caches.gtk2 by libgtk-3-bin' dpkg-divert: error: rename involves overwriting `/usr/sbin/update-icon-caches.gtk2' with different file `/usr/sbin/update-icon-caches', not allowed dpkg: error processing /var/cache/apt/archives/libgtk-3-bin_3.4.2-0ubuntu0.4_i386.deb (--unpack): subprocess new pre-installation script returned error exit status 2 Errors were encountered while processing: /var/cache/apt/archives/libgtk-3-bin_3.4.2-0ubuntu0.4_i386.deb E: Sub-process /usr/bin/dpkg returned an error code (1) I'm not sure why it's complaining about a newer version of a package, but any help would be appreciated

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• Loading table sections when using headers

  - by Luis Tovar

  I cant seem to wrap my head around this. I have googled, and overstacked for hours now looking for examples that i can relate to. What I have is two arrays. The name of my first NSMutableArray is "showDates". I have 3 objects in here. Object 0: "Today, May 20th" Object 1: "Tomorrow, May 21st" Object 2: "Saturday, May 22nd" Then I have my second NSMutableArray named "showTimes" I have about 15 objects in there with strings in each object. ( i hope that makes sense? ) Each object is structured like this: Object 0: showID @"98022" eventID @"833" showTime @"1:30pm" showDate @"Today, May 20th" auditorium @"9" venue @"2991" Object 1: showID @"98222" eventID @"813" showTime @"2:30pm" showDate @"Tomorrow, May 21st" auditorium @"9" venue @"2991" Etc, etc, .... I have the headers working great in my tableView, but I cant seem to figure out how to add the objects in my "showTimes" array under the correct header. Any help would be greatly appreciated.

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• MS project publishing to TFS web portal display

  - by denis bastarache

  So, when we initially created our MPP schedule, I made use of indends / subordinates to break down the project by the various stages of the lifecycle, which is fine... no issues there... But now that I'm trying to publish this over to TFS display, it'll only pick up the actual "action items / sub-tasks" seeing as I have resource allocation specified. So for example I have an "Analysis" phase with a few items underneath, and "System Requirements" phase with the same items, so when I publish these to TFS, it won't display the "Parent" distinction between items, so both "Tasks" instances are being published in TFS under the exact same name... So, if I can't do this Automatically, I'll likely have edit each tasks with "Analysis - Item 1", "Analysis - item 2", "SRD - Item 1", "SRD - item 2"... is there a way to do this automatically, or will have to go the manual route??

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• command line find/replace help

  - by Chrisbloom7

  I've got a set of 5000+ files that I need to do a simple search and replace in. I have been doing it in a text editor (EditPlus) by opening 500 files at a time, doing a global search/replace, saving all, closing, etc. But, that's taking literally hours to do and it's boring and tedious and I already have done it once today and need to do it again because all the files got refreshed. Is there a way to do this via the Bash command line? Here's the details: Find onchange="document.location ='/products/view.html/view/'+this.value" Replace it with onchange="alert('Not implemented')" style="display: none" All of the files have a .HTM extension, but they are nested in several sub directories.

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• how to have files created by CMS have the same ownership as SSH user

  - by Cam

  I am having difficulty on our ubuntu server whereby I have an SSH user that when I create files using this user the ownership is web_user:www-data The problem is when a file is uploaded or created using a content management system like joomla. When files are uploaded through Joomla - such as components / modules... The ownership is set to www-data:www-data This means that I need to then chown all new files to web_user:www-data so we can edit the files. Is there a way to set for a directory and sub-directories that all new files created have the ownership of web_user:www-data? Do I need to use something like setuid or setgid? Any help would be greatly appreciated.

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• how to have files created by CMS have the same ownership as SSH user

  - by Cam

  I am having difficulty on our ubuntu server whereby I have an SSH user that when I create files using this user the ownership is web_user:www-data The problem is when a file is uploaded or created using a content management system like joomla. When files are uploaded through Joomla - such as components / modules... The ownership is set to www-data:www-data This means that I need to then chown all new files to web_user:www-data so we can edit the files. Is there a way to set for a directory and sub-directories that all new files created have the ownership of web_user:www-data? Do I need to use something like setuid or setgid? Any help would be greatly appreciated.

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• How do you store sets in Cassandra?

  - by Ben W

  I'd like to convert this JSON to a data model in Cassandra, where each of the arrays is a set with no duplicates: var data = { "data1": { "100": [1, 2, 3], "200": [3, 4] }, "data2": { "k1", [1], "k2", [4, 5] } } I'd like to query like this: data["data1"]["100"] to retrieve the sets. Anyone know how you might model this in Cassandra? (The only thing I came up with was columns whose name was a set value and the value of the column was an empty string, but that felt wrong.) It's not OK to serialize the sets as JSON or some other string, which would make this much easier. Also, I should note that it's OK to split data1 and data2 into separate ColumnFamilies, it's not necessary that they're keys in the same one.

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• ResultSet and aggregation

  - by kachanov

  Ok, I admit my situation is special There is a data system that supports SQL-92 and JDBC interface However the SQL requets are pretty expensive, and in my application I need to retreive the same data multiple times and aggregate it ("group by") on different fields to show different dimensions of the same data. For example on one screen I have three tables that show the same set or records but aggregated by City (1st grid), by Population (2nd grid), by number of babies (3rd grid) This amounts to 3 SQL queries (which is very slow), UNLESS anyone of you can suggest any idea any library from apache commons or from google code, so that I can select all records into ResultSet and get 3 arrays of data group by different fields from this single ResultSet. Am I'm missing some obvious and unexpected solution to this problem?

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• Custom "Very Long Int" Division Issue

  - by befall

  Hey everyone, So, for a very silly project in C++, we are making our own long integer class, called VLI (Very Long Int). The way it works (they backboned it, blame them for stupidity) is this: User inputs up to 50 digits, which are input as string. String is stored in pre-made Sequence class, which stores the string in an array, in reverse order. That means, when "1234" is input, it gets stored as [4|3|2|1]. So, my question is this: How can I go about doing division using only these arrays of chars? If the input answer is over 32 digits, I can't use ints to check for stuff, and they basically saying using long ints here is cheating. Any input is welcome, and I can give more clarification if need be, thanks everyone.

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• Copy files with filter (XP)

  - by fire

  I have a huge folder (over 6GB) with multiple sub-folders that I want to copy onto an external hard drive, however I do not want it to copy any PDF, EXE or ZIP files across to save space. Is there any software that will help me achieve this? I have looked at TeraCopy but this doesn't seem to have any filter mechanism on it. I am using Windows XP (* sigh *). *edit: found the xcopy command, will this do it? Can anyone help me with the syntax?

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• not able to install g++ and gcc on debian

  - by austin powers

  Hi , I want to use directadmin as my web control panel and it needs several packages like g++ , gcc and etc... as usuall I started to type apt-get install g++ and there problems start : dependecy error... then I tried to apt-get -f install and I got this error (Reading database ... 15140 files and directories currently installed.) Removing libc6-xen ... ldconfig: /etc/ld.so.conf.d/libc6-xen.conf:6: hwcap index 0 already defined as nosegneg dpkg: error processing libc6-xen (--remove): subprocess post-removal script returned error exit status 1 Errors were encountered while processing: libc6-xen E: Sub-process /usr/bin/dpkg returned an error code (1) what shoud I do? I want to install g++ and all of its dependencies due to using of directadmin I need it. regards.

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• How to sort an array or ArrayList<Point> ASC first by x and then by y?

  - by newba

  Hi everyone, I just want to use Collections.sort or Arrays.sort to sort a list of points (class Point) by x first and then by y. I have a class Ponto that implements Comparable like this: public int compareTo(Ponto obj) { Ponto tmp = obj; if (this.x < tmp.x) { return -1; } else if (this.x > tmp.x) { return 1; } return 0; } but now I want to sort by y too after x. How can I do that by modifying the above code? Or is that a better and "clean" way to do this? I also use to pass this code to C++, in which I've created a structure called Point with a equivalent comparable method.

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• Windows 2003 Server Intermittent DNS Issues

  - by Mike

  Looking for a little help here. I have a Windows 2003 DNS Server set up on our network. Lately computers on our LAN have been, at times, unable to resolve a certain sub domain for our website whereas other times the request is resolved just fine. During these periods of "downtime" all other network activity (i.e web sites, internal resolutions, network shares, etc.) remains normal. I can tell it is a problem with our DNS server because the resolution always works from outside our network. I'm hoping someone out there has experienced something similar or could at least offer me place to start troubleshooting. Thanks!

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• Passenger_wsgi.py given precedence over DirectoryIndex?

  - by Walkerneo

  I was having an issue with my site today, where apache wasn't serving index.php by default. I had moved passenger_wsgi.py to the directory above document root so that I could serve python files without having to use PassengerAppRoot in the .htaccess file. I wanted to do this because I set up a development sub-domain on the site, and I wanted to use a different passenger_wsgi for the two domains, but that meant having different .htaccess files for the different PassengerAppRoots. Is there a way to have passenger_wsgi.py where it was and still let apache serve the index.phps? edit: I'm sorry, I'm tired. I just realized that the way this probably works is that passenger_wsgi.py is handling the routing instead of apache.

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• Asp.net razor textbox array for list items

  - by yycdev

  I can't find or figure out how to take a list of items (cupcakes) and display them in razor with a quantity field. What is happening is I am not able to get the values for each cupcake quantity in the list. Can you do textbox arrays in Razor? VIEW <div class="form-group"> <label>Cupcakes</label> @foreach (var cupcake in Model.CupcakeList) { @Html.TextBox("CupcakeQuantities", cupcake.Id) @cupcake.Name <br/> } </div> MODEL public List<Cupcake> CupcakeList { get; set; } public List<int> CupcakeQuantities { get; set; } CONTROLLER public ActionResult Create() { var model = new PartyBookingModel() { CupcakeList = db.Cupcakes.ToList(), CupcakeQuantities = new List<int>() }; return View(model); }

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• How to define a static array without a contant size in a constructor of a class? (C++)

  - by Keand64

  I have a class defined as: class Obj { public: int width, height; Obj(int w, int h); } and I need it to contain a static array like so: int presc[width][height]; however, I cannot define within the class, so it it possible to create a pointer to a 2D array (and, out of curiosity, 3, 4, and 5D arrays), have that as a member of the class, and intitalize it in the constructor like: int ar[5][6]; Obj o(5, 6, &ar); If that isn't possible, is there any way to get a static array without a contant size in a class, or am I going to have to use a dynamic array? (Something I don't want to do because I don't plan on ever changing the size of the array after it's created.)

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• Sort/Enumerate an NSArray from somewhere in the middle?

  - by Kenny Winker

  I have an NSArray, with objects ordered like so: a b c d e f I would like to enumerate through this array in this order: c d e f a b i.e. starting at some point that is not the beginning, but hitting all the items. I imagine this is a matter of sorting first and then enumerating the array, but I'm not sure if that's the best technique... or, frankly, how to sort the array like this. Edit Adding details: These will be relatively small arrays, varying from 3 to 10 objects. No concurrent access. I'd like to permanently alter the sort order of the array each time I do this operation.

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• Array in Bash Not Found

  - by Waffle

  I am trying to declare an array in bash, but when the code is run it says it cannot find the array. I have tried to write out the declaration of the array in several different ways, but it seems no matter how I try to declare it I cannot get it to work. I originally tried to declare it as such: candidate[1]= 0 candidate[2]= 0 candidate[3]= 0 The error messages that are returned are: votecalculation.sh: 13: candidate[1]=: not found votecalculation.sh: 14: candidate[2]=: not found votecalculation.sh: 15: candidate[3]=: not found After this I tried another solution I found online: ARRAY=( 'can1' 'can2' 'can3' ) When that is used it returns this error: votecalculation.sh: 12: Syntax error: "(" unexpected I am new to Bash and am getting really confused about arrays. Is there some specific way I need to declare an array or am I just going about it completely wrong?

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• Copy a single file from main directory recursively across all directories within

  - by chris

  I'm on a dedicated server using CentOS, and on this server I have 5000+ directories in one main directory. In the main directory I have an index.php. I would like to copy this index.php into all 5000+ directories, but the only way I know how is doing it manually. Is there a way through the command line that I can enter something like cp and make it work from the directory? I'd copy it all the way down through all the directories and there sub directories within this main directory I am starting out in.

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