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• Database system that is not relational.

  - by paan

  What are the other types of database systems out there. I've recently came across couchDB that handles data in a non relational way. It got me thinking about what other models are other people is using. So, I want to know what other types of data model is out there. (I'm not looking for any specifics, just want to look at how other people are handling data storage, my interest are purely academic) The ones I already know are: RDBMS (mysql,postgres etc..) Document based approach (couchDB, lotus notes) Key/value pair (BerkeleyDB)

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• Are MongoDB and CouchDB perfect substitutes?

  - by raoulsson

  I haven't got my hands dirty yet with neither CouchDB nor MongoDB but I would like to do so soon... I also have read a bit about both systems and it looks to me like they cover the same cases... Or am I missing a key distinguishing feature? I would like to use a document based storage instead of a traditional RDBMS in my next project. I also need the datastore to handle large binary objects (images and videos) automatically replicate itself to physically separate nodes rendering the need of an additional RDBMS superfluous Are both equally well suited for these requirements? Thanks!

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• How do you compare music data

  - by Chris

  i want to write an app to rename sort and organize my music library (mp3's, wav's, flac's). I wanted to take a portion of the song, say the first minutes, and compare that to a database and then retrieve the song name and tag information. I have heard that you can do this with last.fm but a look through their api info didn't help. My question is, what is this called so i can google it better? nothing i am trying is helping much. This would be similar to the shazam android app. My prefered language would be java, so i can run it on a few operating systems easier, but that might be subject to change depending on how i can do it. Thanks

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• Books on data-intensive enterprise integration patterns

  - by Tristan

  I'm trying to understand design patterns used by data-intensive enterprise applications. A classic example is the financial industry, where system must consume, analyze, and execute on real-time financial data while providing information and configuration options to a broad set of traders and analysts. One can imagine similar system in airlines, major supply chain operations, and utility providers. Are there good books that provide and inside view of how these systems work? Enterprise Integration Patterns is one example, but I'm looking for something with more real-world applications, particularly in finance.

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• what are your biggest complaints about TFS as source-control?

  - by jcollum

  I've used TFS for about 18 months now and I'm really not excited about it. It seems like the worst of the current versions of SCMs on the market. I think this thread will help people decide if TFS is for them vs. other source control systems. While TFS does a lot more than that, I think that source control is so critical to software development that any system (or combination thereof) that you pick needs to consider source control first. So, feel free to sound off. Maybe it'll make us feel better and be informative at the same time.

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• Finding relative libraries when using symlinks to ruby executables

  - by dgtized

  Imagine you have an executable foo.rb, with libraries bar.rb layed out in the following manner: <root>/bin/foo.rb <root>/lib/bar.rb In the header of foo.rb you place the following require to bring in functionality in bar.rb: require File.dirname(__FILE__)+"../lib/bar.rb" This works fine so long as all calls to foo.rb are direct. If you put as say $HOME/project, and symlink foo.rb into $HOME/usr/bin, then __FILE__ resolves to $HOME/usr/bin/foo.rb, and is thus unable to locate bar.rb in relation to the dirname for foo.rb. I realize that packaging systems such as rubygems fix this by creating a namespace to search for the library, and that it is also possible to adjust the load_path using $: to include $HOME/project/lib, but it seems as if a more simple solution should exist. Has anyone had experience with this problem and found a useful solution or recipe?

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• Program visible to Linux as normal directory

  - by Xam

  I'm trying to write program to work as programmable directory, in other words: User, or other systems open that directory and read/write files or dirs. I try to create program to cache most used files in memory (less I/O to HDD), but right now I don't know how to achive that. There are probably some docs about this but I can't find them. I know that there is FUSE, NFS and others, but reading their source is quite difficult. If any one has info about implementation in C lang I'll be very grateful. Sorry for my English..

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• Sync database from desktop system to remote server and vice versa?

  - by qulzam

  I make a application, which has to interfaces. one is desktop and other is web application. both have their own databases (which are same is structure). I want to sync the database from desktop to remote server and also from remote server to desktop but i have no idea that how it does. I use the MYSql database. and my desktop application is in .NET NOTE: There are more than one destop systems who update their databases and also sync databases.

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• How do you plan for starting a new web system?

  - by Kerry

  I've been creating more and more systems recently and I find more and more planning and preparation I do before starting the project. I determine what libraries or frameworks I will be using, what languages, the basic architecture of how the site will flow, etc. I've also heard of other design processes such as hanging styrofoam balls to show where classes are and how they relate, which is a process I've never heard of nor do I know how it works. Is there any software that helps with this process? Are there any guidelines or steps or do you have a recommended set of steps or guidelines that you follow when designing a new project?

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• Large strings: Text files or SQL DB?

  - by Tommo

  I am coding a forum system using PHP. I am currently storing a threads ID, title, author, views and other attributes in an SQL database and then storing the thread body (the HTML and BBcode) in text files inside a folder named after the thread ID. In practise it's really simple to grab the database values then just grab the thread body from the text file, but I was wondering if this is the 'proper way'? I have personally no problems doing this but if it turns out it is massively inefficient and I should instead store both the thread body HTML and BBcode in the database instead then I will change. However, to me it seems wrong to store such a (very possibly) huge string of multi-line text along with lots of different characters in a database - I was taught that databases are more for short field 'values' rather than website content. I would just like a definitive answer to this because it's been bugging me for ages as to wherever I’ve been doing it properly. Does anyone know how popular forum systems store threads?

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• What is it like working as a computer programmer

  - by Luke101

  I have a day job as an IT system administrator, but I do a lot of c# asp.net programming on my spare time. I have always wondered what its like to be a real software developer. I have taken a look at big CMS systems like umbraco and Dotnetnuke and said to myself that these developers must have decades of programming experience. Just the design of these products are overwhelming let alone the actual code. I just would like your comments on what it is like being a programmer.

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• Simple Version Contol

  - by JM01

  We work on a lot of small website projects. There are three of us in different physical locations. I would like a system that is very simple where the main concern is checking out and checking in web files (php, css, images, js) so that we don't accidentally overwrite each other's code. We also need a way to synch our local file systems with the files on the webserver and with each other. Rolling back to older versions is nice but features like branching and merging are not important. It seems like GIT may be overkill for our purpose or maybe not. Can you recommend anything?

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• Storing Data as XML BLOB

  - by NBrowne

  Hi, At the moment the team i am working with is looking into the possibility of storing data which is entered by users from a series of input wizard screens as an XML blob in the database. the main reason for this being that i would like to write the input wizard as a component which can be brought into a number of systems without having to bring with it a large table structure. To try to clarify if the wizard has 100 input fields (for example) then if i go with the normal relational db structure then their will be a 1 to 1 relationship so will have 100 columns in database. So to get this working in another system will have to bring the tables,strore procedures etc into the new system. I have a number of reservations about this but i would like peoples opinions?? thanks

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• GLOB_BRACE portability?

  - by Pekka

  In this question, I was made aware of glob()'s GLOB_BRACE option that allows for a limited set of regular expressions when searching for files. This looks just like what I need, but according to the manual, GLOB_BRACE is "not available on some Non-GNU Operating systems." Among those seems to be Solaris. I am building an application that is supposed to be as portable as possible, so I need to check out possible problems as early as possible. Does somebody know of other platforms apart from Solaris where GLOB_BRACE is not supported? How about Mac OS = X for example? It's built on top of a Unix. Is every Unix automatically a "GNU" platform as defined in the manual?

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• HTTP server that handles requests through IO devices?

  - by StackedCrooked

  This question can probably only be answered for Unix-like systems that follow the "everything is a file" idiom. Would it be hard to create a web server that mounts local devices for handling http traffic? It would enable a program to read raw http requests from /dev/httpin (for example) and write the responses to /dev/httpout. I think this would be nice because it would allow me to create a web server from any programming language that is capable of handling IO streams. I don't really know where to start on this. Any suggestions on how to setup such a system?

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• Makefile: expand dependencies

  - by Danyel

  First off, the title is very generic because there are just tons of ways of how to possibly solve this. However, I'm looking for a clean and neat way. Situation: I have two equal object files foo.o and foo-pi.o, the latter of which is position-independent (compiled with -fPIC). Both depend on foo.h and bar.h. Problem: How do I, without code duplication, declare dependency of all foo*.o to bar.h? Solutions so far: $(shell bash -c 'echo -ne foo{-pi,}.o'}: bar.h $(addsuffix .o, $(addprefix fo, o-pi o)): bar.h The first solution is not portable on systems that don't support bash, the second is a dirty solution since I could not figure out how to use empty strings in addprefix.

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• How to run a command on a remote Windows system as a non-admin user with WMI?

  - by John

  I have a script written in Visual Basic that starts a process (given to the script as an argument) on a remote system (again, given as an argument) using WMI. This script works fine when using an Administrator account on the remote system, but when using a non-administrator account, I get the following error: ConnectServer Failed w/ (-2147024891) Access is denied. I'd like to be able to run processes on remote systems as a non-administrator user with this script, and I'm pretty sure the problem is due to security settings on the remote system, but I've not been able to reset the right ones.

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• git - how do we verify commit messages for a push?

  - by shovas

  Coming from CVS, we have a policy that commit messages should be tagged with a bug number (simple suffix "... [9999]"). A CVS script checks this during commits and rejects the commit if the message does not conform. The git hook commit-msg does this on the developer side but we find it helpful to have automated systems check and remind us of this. During a git push, commit-msg isn't run. Is there another hook during push that could check commit messages? How do we verify commit messages during a git push?

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• Win32_PageFileUsage WMI call returning 0 for CurrentUsage

  - by Ryan Duffield

  I am querying for the current page file usage on Windows-based systems. This is meant to run on the .NET Framework, version 2.0 SP1 and has been tested (and works!) on Windows Vista, Windows 7, Windows Server 2003 R2 and Windows Server 2008. On Windows Server 2003 SP2 (original release, not R2) it appears to return 0: using (var query = new ManagementObjectSearcher("SELECT CurrentUsage FROM Win32_PageFileUsage")) { foreach (ManagementBaseObject obj in query.Get()) { uint used = (uint)obj.GetPropertyValue("CurrentUsage"); return used; } } This is simply returning the results from the first row returned for the WMI call. Even when a page file is being used, it returns 0. What causes the result to be 0 when it should be returning a larger value? It may be something specific to the machine in question, and could have nothing to do with the operating system version. I've also tried this with and without elevated privileges with the same results.

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• Proper way to handle issue when porting 32 to 64 bit. Conversion from DT1 to DT2 of greater size

  - by grobartn

  So I am trying to port 32 bit to 64 bit. I have turned on the VS2008 flag for detecting problems with 64 bit. I am trying following: char * pList = (char *)uiTmp); warning C4312: 'type cast' : conversion from 'unsigned int' to 'char *' of greater size Disregard the code itself. This is also true for any pointer, because 64 bit pointer is greater than 32 bit unsigned int or int for that purpose. Given that you have to cast smaller type to greater how would you go about doing it so it correctly on both 32/64 bit systems

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• How to model file system operations with REST?

  - by massive

  There are obvious counterparts for some of file systems' basic operations (eg. ls and rm), but how would you implement not straightforwardly RESTful actions such as cp or mv? As answers to the question REST services - exposing non-data “actions” suggest, the preferred way of implementing cp would include GETting the resource, DELETing it and PUTting it back again with a new name. But what if I would need to do it efficiently? For instance, if the resource's size would be huge? How would I eliminate the superfluous transmission of resource's payload to client and back to the originating server? Here is an illustration. I have a resource: /videos/my_videos/2-gigabyte-video.avi and I want copy it into a new resource: /videos/johns_videos/copied-2-gigabyte-video.avi How would I implement the copy, move or other file system actions the RESTful way? Or is there even a proper way? Am I doing it all wrong?

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• lexers / parsers for (un) structured text documents

  - by wilson32

  There are lots of parsers and lexers for scripts (i.e. structured computer languages). But I'm looking for one which can break a (almost) non-structured text document into larger sections e.g. chapters, paragraphs, etc. It's relatively easy for a person to identify them: where the Table of Contents, acknowledgements, or where the main body starts and it is possible to build rule based systems to identify some of these (such as paragraphs). I don't expect it to be perfect, but does any one know of such a broad 'block based' lexer / parser? Or could you point me in the direction of literature which may help?

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• Find original owning process of a Linux socket

  - by Rob H

  In Linux and other UNIX-like operating systems, it is possible for two (or more) processes to share an Internet socket. Assuming there is no parent-child relationship between the processes, is there any way to tell what process originally created a socket? Clarification: I need to determine this from "outside" the processes using the /proc filesystem or similar. I can't modify the code of the processes. I can already tell what processes are sharing sockets by reading /proc/<pid>/fd, but that doesn't tell me what process originally created them.

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• Are there any FTP programs which can automatically send the contents of a folder to a remote server?

  - by Nick G

  Are there any FTP programs which can automatically copy (or rather 'move') the contents of a folder to a remote server? I have of course googled this but only really found one or two ancient products which look really clunky and unmaintained. I was wondering if there's a way to do this from the command line or any better solution to the base problem. In more detail, new files get written to a folder every few hours. These new files need to be FTP'd elsewhere and then deleted. Mirroring or synchonisation systems are probably out of the picture as we need to delete the source files once they've been successfully transferred. If it's easier, the 'solution' could pull the files off the server (rather than the server pushing them to the client). The computers will both be Windows OS.

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• IE 8 Error - What's the cause?

  - by DanCapitanDePlai

  I have two magento eshops that worked perfectly in the past on all major browsers except IE 7. After I installed WINDOWS XP on my computer and accessed my eshops with IE 8, I almost had a heartattack seeing that they aren't working as they should. Before installing Windows XP I was running Windows 7 and the websites were looking good on IE 8. Now, the same IE version, but on different operating systems, gives me headaches! Now, can someone explain me how to 'debug' the ie 8 parsing engine for seeing the errors and try to modify the templates? Thanks.

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