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• Verify server performance

  - by George Kesler

  I'm looking for a quick and SIMPLE way to verify that new servers are performing as expected. The most important metric is disk performance, second is network performance. I’m trying to prevent problems caused by misconfiguration of RAID arrays, NIC teaming etc. The solution should work with both physical and virtual servers. I don’t need sophisticated analysis with different workloads, just one set of benchmarks which I would run against a reference server and later compare to new ones. One problem is that most benchmarks are not giving accurate results when running on a VM.

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• Math questions at a programmer interview?

  - by anon

  So I went to an interview at Samsung here in Dallas, Texas. The way the recruiter described the job, he didn't make it sound like it was too math-oriented. The job basically involved graphics programming and C++. Yes, math is implied in graphics programming, especially shaders, but I still wasn't expecting this... The whole interview lasted about an hour and a half and they asked me nothing but math-related questions. They didn't ask me a single programming question, which I found odd. About all they did was ask me how to write certain math routines as a C++ function, but that's about it. What about programming philosophy questions? Design patterns? Code-correctness? Constness? Exception safety? Thread safety? There are a zillion topics that they could have covered. But they didn't. The main concern I have is that they didn't ask any programming questions. This basically implies to me that any programmer who is good at math can get a job here, but they might put out terrible code. Of course, I think I bombed the interview because I haven't used any sort of linear algebra in about a year and I forget math easily if I haven't used it in practice for a while. Are any of my other fellow programmers out there this way? I'm a game programmer too, so this seems especially odd. The more I learn, the more old knowledge that gets "popped" out of my "stack" (memory). My question is: Does this interview seem suspicious? Is this a typical interview that large corporations have? During the interview they told me that Google's interview process is similar. They have multiple, consecutive interviews where the math problems get more advanced.

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• SSH onto Ubuntu box using RSA keys

  - by jex

  I recently installed OpenSSH on one of my Ubuntu machines and I've been running into problems getting it to use RSA keys. I've generated the RSA key on the client (ssh-keygen), and appended the public key generated to both the /home/jex/.ssh/authorized_keys and /etc/ssh/authorized_keys files on the server. However, when I try to login (ssh -o PreferredAuthorizations=publickey jex@host -v [which forces the use of public key for login]) I get the following output: debug1: Host 'pentheon.local' is known and matches the RSA host key. debug1: Found key in /home/jex/.ssh/known_hosts:2 debug1: ssh_rsa_verify: signature correct debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug1: SSH2_MSG_NEWKEYS received debug1: SSH2_MSG_SERVICE_REQUEST sent debug1: SSH2_MSG_SERVICE_ACCEPT received Banner message debug1: Authentications that can continue: publickey,keyboard-interactive debug1: Next authentication method: publickey debug1: Offering public key: /home/jex/.ssh/id_rsa debug1: Authentications that can continue: publickey,keyboard-interactive debug1: Trying private key: /home/jex/.ssh/identity debug1: Trying private key: /home/jex/.ssh/id_dsa debug1: No more authentication methods to try. Permission denied (publickey,keyboard-interactive). I'm not entirely sure where I've gone wrong. I am willing to post my /etc/ssh/sshd_config if needed.

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• How to use shared_ptr for COM interface pointers

  - by Seefer

  I've been reading about various usage advice relating to the new c++ standard smart pointers unique_ptr, shared_ptr and weak_ptr and generally 'grok' what they are about when I'm writing my own code that declares and consumes them. However, all the discussions I've read seem restricted to this simple usage situation where the programmer is using smart in his/her own code, with no real discussion on techniques when having to work with libraries that expect raw pointers or other types of 'smart pointers' such as COM interface pointers. Specifically I'm learning my way through C++ by attempting to get a standard Win32 real-time game loop up and running that uses Direct2D & DirectWrite to render text to the display showing frames per second. My first task with Direct2D is in creating a Direct2D Factory object with the following code from the Direct2D examples on MSDN: ID2D1Factory* pD2DFactory = nullptr; HRESULT hr = D2D1CreateFactory(D2D1_FACTORY_TYPE_SINGLE_THREADED, &pD2DFactory); pD2DFactory is obviously an 'out' parameter and it's here where I become uncertain how to make use of smart pointers in this context, if indeed it's possible. My inexperienced C++ mind tells me I have two problems: With pD2DFactory being a COM interface pointer type, how would smart_ptr work with the Add() / Release() member functions for a COM object instance? Are smart pointers able to be passed to functions in situations where the function is using an 'out' pointer parameter technique? I did experiment with the alternative of using _com_ptr_t in the comip.h header file to help with pointer lifetime management and declared the pD2DFactory pointer with the following code: _com_ptr_t<_com_IIID<pD2DFactory, &__uuidof(pD2DFactory)>> pD2DFactory = nullptr; and it appears to work so far but, as you can see, the syntax is cumbersome :) So, I was wondering if any C++ gurus here could confirm whether smart pointers are able to help in cases like this and provide examples of usage, or point me to more in-depth discussions of smart pointer usage when needing to work with other code libraries that know nothing of them. Or is it simply a case of my trying to use the wrong tool for the job? :)

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• Is there any evidence that drugs can actually help programmers produce "better" code? [closed]

  - by sytycs

  I just read this quote from Steve Jobs: "Doing LSD was one of the two or three most important things I have done in my life." Also a quote from that article: He was hardly alone among computer scientists in his appreciation of hallucinogenics and their capacity to liberate human thought from the prison of the mind. Now I'm wondering if there's any evidence to support the theory that drugs can help make a "better" programmer. Has there ever been a study where programmers have been given drugs to see if they could produce "better" code? Is there a well-known programming concept or piece of code which originated from people who were on drugs? EDIT So I did a little more research and it turns out Dennis R. Wier actually documented how he took LSD to wrap his head around a coding project: "At one point in the project I could not get an overall viewpoint for the operation of the entire system. It really was too much for my brain to keep all the subtle aspects and processing nuances clear so I could get a processing and design overview. After struggling with this problem for a few weeks, I decided to use a little acid to see if it would enable a breakthrough, because otherwise, I would not be able to complete the project and be certain of a consistent overall design"[1] There is also an interesting article on wired about Kevin Herbet, who used LSD to solve tough technical problems and chemist Kary Mullis even said "...that LSD had helped him develop the polymerase chain reaction that helps amplify specific DNA sequences." [2]

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• Strange mesh import problem with Assimp and OpenGL

  - by Morgan

  Using the assimp library for importing 3D data into an OpenGL application. I get some strange problems regarding indexing of the vertices: If I use the following code for importing vertex indices: for (unsigned int t = 0; t < mesh->mNumFaces; ++t) { const struct aiFace * face = &mesh->mFaces[t]; if (face->mNumIndices == 3) { indices->push_back(face->mIndices[0]); indices->push_back(face->mIndices[1]); indices->push_back(face->mIndices[2]); } } I get the following result: Instead, if I use the following code: for(int k = 0; k < 2 ; k++) { for (unsigned int t = 0; t < mesh->mNumFaces; ++t) { const struct aiFace * face = &mesh->mFaces[t]; if (face->mNumIndices == 3) { indices->push_back(face->mIndices[0]); indices->push_back(face->mIndices[1]); indices->push_back(face->mIndices[2]); } } } I get the correct result: Hence adding the indices twice, renders the correct result? The OpenGL buffer is populated, like so: glBufferData(GL_ELEMENT_ARRAY_BUFFER, indices->size() * sizeof(unsigned int), indices->data(), GL_STATIC_DRAW); And rendered as follows: glDrawElements(GL_TRIANGLES, vertexCount*3, GL_UNSIGNED_INT, indices->data());

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• Advise about performance for local or remote SQL Server?

  - by TruMan1

  I currently have my web server and SQL Express / MySQL server on the same server. It is on a VPS. I have been having problems with my hosting so I am thinking of separating the web and db server into 2 VPS servers. Does anyone recommend this? I am worried that changing my setup from a local DB server to a remote one will degrade performance heavily. They will not be on the same network, but will reference each other via an IP address. Anything I should be aware of?

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• Can .htaccess slow down a site?

  - by Cody Sharp

  I'm working with a client on an e-commerce website. I implemented clean URLs using .htaccess. I also used .htaccess to solve canonical issues such as redirecting www to non-www and removing index.php from the URL. The website recently began to slow down dramatically, sometimes not even loading. The site is hosted on GoDaddy, and when the client called GoDaddy they told him it was the .htaccess file slowing down the website. I find this highly unlikely because of my past experiences, but I'm not 100% sure. My thinking is that the client's website is most likely on a shared server with a busy neighborhood, thus slowing down the site. It's not always slow, but rather sporadic throughout the day, loading fast at some points and slow at other points in time. Can the .htaccess file slow down a website to a crawl? If so, are there better ways to solve these problems with different rewrite rules and such? Here is what the actual .htaccess file looks like: Options +FollowSymlinks RewriteEngine On RewriteBase / RewriteCond %{HTTP_HOST} ^www.example.net [NC] RewriteRule ^(.*)$ http://example.net/$1 [L,R=301] RewriteRule ^products/([0-9a-zA-Z\_\-]*)\.htm([l]?)$ index.php p=product&product_code=$1 [L] RewriteRule ^catalog/([0-9a-zA-Z\_\-]*)\.htm([l]?)$ index.php p=catalog&catalog_code=$1 [L] RewriteRule ^pages/([0-9a-zA-Z\_\-]*)\.htm([l]?)$ index.php?p=page&page_id=$1 [L] RewriteRule ^index\.htm([l]?)$ index.php?p=home [L] RewriteRule ^site_map\.htm([l]?)$ index.php?p=site_map [L] RewriteCond %{QUERY_STRING} ^p=home$ RewriteRule (.*) ? [R=permanent] I'm a .htaccess and regex novice, so any pointed out mistakes would also help. Thank you.

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• First Person Camera strafing at angle

  - by Linkandzelda

  I have a simple camera class working in directx 11 allowing moving forward and rotating left and right. I'm trying to implement strafing into it but having some problems. The strafing works when there's no camera rotation, so when the camera starts at 0, 0, 0. But after rotating the camera in either direction it seems to strafe at an angle or inverted or just some odd stuff. Here is a video uploaded to Dropbox showing this behavior. https://dl.dropboxusercontent.com/u/2873587/IncorrectStrafing.mp4 And here is my camera class. I have a hunch that it's related to the calculation for camera position. I tried various different calculations in strafe and they all seem to follow the same pattern and same behavior. Also the m_camera_rotation represents the Y rotation, as pitching isn't implemented yet. #include "camera.h" camera::camera(float x, float y, float z, float initial_rotation) { m_x = x; m_y = y; m_z = z; m_camera_rotation = initial_rotation; updateDXZ(); } camera::~camera(void) { } void camera::updateDXZ() { m_dx = sin(m_camera_rotation * (XM_PI/180.0)); m_dz = cos(m_camera_rotation * (XM_PI/180.0)); } void camera::Rotate(float amount) { m_camera_rotation += amount; updateDXZ(); } void camera::Forward(float step) { m_x += step * m_dx; m_z += step * m_dz; } void camera::strafe(float amount) { float yaw = (XM_PI/180.0) * m_camera_rotation; m_x += cosf( yaw ) * amount; m_z += sinf( yaw ) * amount; } XMMATRIX camera::getViewMatrix() { updatePosition(); return XMMatrixLookAtLH(m_position, m_lookat, m_up); } void camera::updatePosition() { m_position = XMVectorSet(m_x, m_y, m_z, 0.0); m_lookat = XMVectorSet(m_x + m_dx, m_y, m_z + m_dz, 0.0); m_up = XMVectorSet(0.0, 1.0, 0.0, 0.0); }

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• can't configure openfire

  - by SnOrfus

  I'm trying to setup openfire on one of the servers here and I've gone through the windows installer, installed the service, started the service and I can't connect to the admin console. If I go to http://127.0.0.1:9090 (or http://127.0.0.1/index.html) all I get is a blank page. I also tried running the GUI instead of the service, and it said that it was listening on 127.0.0.1:9090 and when I navigate there or click "launch admin" I still get a blank page. What could be the problem? It's a windows server 2k3 machine with IIS running (runs a couple of other sites). edit openfire 3.6.4 I installed on my local machine without problems, so it's obviously something on the server that's causing it. There is no firewall installed on that server so I'm not sure what would be stopping it.

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• How to recover data from a failing hard drive?

  - by intuited

  An external 3½" HDD seems to be in danger of failing — it's making ticking sounds when idle. I've acquired a replacement drive, and want to know the best strategy to get the data off of the dubious drive with the best chance of saving as much as possible. There are some directories that are more important than others. However, I'm guessing that picking and choosing directories is going to reduce my chances of saving the whole thing. I would also have to mount it, dump a file listing, and then unmount it in order to be able to effectively prioritize directories. Adding in the fact that it's time-consuming to do this, I'm leaning away from this approach. I've considered just using dd, but I'm not sure how it would handle read errors or other problems that might prevent only certain parts of the data from being rescued, or which could be overcome with some retries, but not so many that they endanger other parts of the drive from being saved. I guess ideally it would do a single pass to get as much as possible and then go back to retry anything that was missed due to errors. Is it possible that copying more slowly — e.g. pausing every x MB/GB — would be better than just running the operation full tilt, for example to avoid any overheating issues? For the "where is your backup" crowd: this actually is my backup drive, but it also contains some non-critical and bulky stuff, like music, that aren't backups, i.e. aren't backed up. The drive has not exhibited any clear signs of failure other than this somewhat ominous sound. I did have to fsck a few errors recently — orphaned inodes, incorrect free blocks/inodes counts, inode bitmap differences, zero dtime on deleted inodes; about 20 errors in all. The filesystem of the partition is ext3.

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• A good Linux alternative to Ubuntu for a working environment.

  - by Roozak

  Hi, Im running a decent laptop with 3GB ram and 2GHz Core Duo. I use it mainly for working which requires several SSH and SFTP connections to servers and running a VM most of the time. Nothing much more intensive than that. I like using Ubuntu 9.10 however I have the issue of Nautilus and the top/bottom menus freezing up on me constantly - dare I say it, alot more problems than when I was using Windows Vista. Im just looking for recommendations of other operating systems which would be suitable for the task. Thanks

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• Is it wise to ask about design decisions made on a product during an interview?

  - by Desolate Planet

  I've been thinking about interview questions lately and I've been reflecting on bad interview experiences I've had in the past. One of particular note is where I had asked the interviewer why the team chose to use Spring over EJB3 in their product. The interviewer pretty much tore my face off, yelling "Because Spring is not the be all and end all of Java software development, do you want this job or not?". In response to this, I told him that this probably wasn't the job for me and I walked out the interview. He told me at the start of the interview that they had high stuff turnover, the product had gone from Modula 3 to Perl to Java then after asking him a technical question, he went in flames. It seemed obvious to me that he was toxic to the company with that kind of attitude. Question: Is it a good idea to probe on architectural choices taken in an interview? If not, why? From my own point of view, an interview is a two-way process. If the interviewers are testing me on my technical skills, I've got every right to ask them the same questions to 1) Figure out what their mindset and attitudes towards developing software solutions are and 2) To figure out if there are in line with how I would approach problems of that kind. It's very possible that the interviewer who got angry was a bad interviewer and forgot that an interview is a two-way process. If I was asked this, I would have simply said something along the lines of wanting to leverage the container more, but I certainly wouldn't have tried to put him in a state of meek capitulation. The interviewer in question was the lead developer in the team.

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• SSMS Tools Pack 2.0 is out! With huge productivity booster features that will blow your mind and ease your job even more.

  - by Mladen Prajdic

  What better way to end the summer and start those productive autumn days ahead than with a fresh new version of the SSMS Tools Pack. This is a big release with two new features that are huge productivity boosters. First new feature are Tab Sessions. Every SQL tab you open is saved every N (default 2) minutes and is stored in a session. This works similar to internet browser sessions. Once you reopen SSMS you can restores your last session with a click of a button. You even get every window connected to the server it was previously connected to. The Tab History Window looks like this:   The second feature is Execution Plan Analyzer. It is designed to quickly help you find costliest operators by a number of properties. If that's not enough you can easily search through the whole execution plan for whatever you like. And to top it off you can auto analyze the execution plan. The analysis reports various problems the execution plan has and suggests a most common solution. The ultimate purpose of the Execution Plan Analyzer is to make your troubleshooting quicker and easier. It uses a simple user interface that is easy to navigate and is built directly into the execution plan itself. The execution plan analyzer looks like this:   Smaller fixes include a completely redesigned SQL History Search window and various other bug fixes. You can download the new version 2.0 at the Download page. For more detailed feature descriptions go to the main Features Page. Enjoy it!

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• Is it just me or is this a baffling tech interview question

  - by Matthew Patrick Cashatt

  Background I was just asked in a tech interview to write an algorithm to traverse an "object" (notice the quotes) where A is equal to B and B is equal to C and A is equal to C. That's it. That is all the information I was given. I asked the interviewer what the goal was but apparently there wasn't one, just "traverse" the "object". I don't know about anyone else, but this seems like a silly question to me. I asked again, "am I searching for a value?". Nope. Just "traverse" it. Why would I ever want to endlessly loop through this "object"?? To melt my processor maybe?? The answer according to the interviewer was that I should have written a recursive function. OK, so why not simply ask me to write a recursive function? And who would write a recursive function that never ends? My question: Is this a valid question to the rest of you and, if so, can you provide a hint as to what I might be missing? Perhaps I am thinking too hard about solving real world problems. I have been successfully coding for a long time but this tech interview process makes me feel like I don't know anything. Final Answer: CLOWN TRAVERSAL!!! (See @Matt's answer below) Thanks! Matt

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• Empirical evidence for choice of programming paradigm to address a problem

  - by Graham Lee

  The C2 wiki has a discussion of Empirical Evidence for Object-Oriented Programming that basically concludes there is none beyond appeal to authority. This was last edited in 2008. Discussion here seems to bear this out: questions on whether OO is outdated, when functional programming is a bad choice and the advantages and disadvantages of AOP are all answered with contributors' opinions without reliance on evidence. Of course, opinions of established and reputed practitioners are welcome and valuable things to have, but they're more plausible when they're consistent with experimental data. Does this evidence exist? Is evidence-based software engineering a thing? Specifically, if I have a particular problem P that I want to solve by writing software, does there exist a body of knowledge, studies and research that would let me see how the outcome of solving problems like P has depended on the choice of programming paradigm? I know that which paradigm comes out as "the right answer" can depend on what metrics a particular study pays attention to, on what conditions the study holds constant or varies, and doubtless on other factors too. That doesn't affect my desire to find this information and critically appraise it. It becomes clear that some people think I'm looking for a "turn the crank" solution - some sausage machine into which I put information about my problem and out of which comes a word like "functional" or "structured". This is not my intention. What I'm looking for is research into how - with a lot of caveats and assumptions that I'm not going into here but good literature on the matter would - certain properties of software vary depending on the problem and the choice of paradigm. In other words: some people say "OO gives better flexibility" or "functional programs have fewer bugs" - (part of) what I'm asking for is the evidence of this. The rest is asking for evidence against this, or the assumptions under which these statements are true, or evidence showing that these considerations aren't important. There are plenty of opinions on why one paradigm is better than another; is there anything objective behind any of these?

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• Pinning Google Chrome's "Application Shortcuts" to the Windows 7 Taskbar

  - by Humphrey

  I love the idea behind Google Chromes Application Shortcuts, but they don't integrate well for me into the Windows 7 taskbar. Ideally, I'd like to be able to have my most used webpages (gmail, calendar, etc) as separate windows, pinned to the Windows 7 taskbar. I've created some application shortcuts on my desktop, but I've come across the following problems. If I open my gmail application shortcut, and then later on open a normal chrome window the new window will also use the gmail icon in the taskbar, even if that window has nothing to do with gmail. (What's weirder, is that this new window then uses a high-res gmail icon, but my actually application shortcut window uses a low-res icon. If I pin the application shortcut to the taskbar, then the icon turns into the regular chrome icon. Any idea's how to fix these issues? Or are they bugs in google chrome? Chrome version: 4.0.249.89

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• SSIS Dashboard v0.4

  - by Davide Mauri

  Following the post on SSISDB script on Gist, I’ve been working on a HTML5 SSIS Dashboard, in order to have a nice looking, user friendly and, most of all, useful, SSIS Dashboard. Since this is a “spare-time” project, I’ve decided to develop it using Python since it’s THE data language (R aside), it’s a beautiful & powerful, well established and well documented and with a rich ecosystem around. Plus it has full support in Visual Studio, through the amazing Python Tools For Visual Studio plugin, I decided also to use Flask, a very good micro-framework to create websites, and use the SB Admin 2.0 Bootstrap admin template, since I’m all but a Web Designer. The result is here: https://github.com/yorek/ssis-dashboard and I can say I’m pretty satisfied with the work done so far (I’ve worked on it for probably less than 24 hours). Though there’s some features I’d like to add in t future (historical execution time, some charts, connection with AzureML to do prediction on expected execution times) it’s already usable. Of course I’ve tested it only on my development machine, so check twice before putting it in production but, give the fact that, virtually, there is not installation needed (you only need to install Python), and that all queries are based on standard SSISDB objects, I expect no big problems. If you want to test, contribute and/or give feedback please fell free to do it…I would really love to see this little project become a community project! Enjoy!

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• 3½" PATA Western Digital Caviar SE (250MB) makes steady ticking sound when idle

  - by intuited

  I've started to notice a ticking sound emanating from my WD2500JB. It is not alarmingly loud. The sound seems to occur only when the drive has been idle for some time, and will cease upon (some?) disk activity. The sound has a regular, steady cadence of somewhere between about 4 and 6 ticks per second. I'm not entirely certain that it just started making these sounds, since I previously had the drive — mounted in a USB enclosure — stored out of earshot, and only recently moved it to where I can hear it. The SMART attributes for the drive do not indicate any problems. I did have some errors to clean up recently (since I started noticing the sounds). The errors occurred on an ext3 filesystem. The drive had been powered down while mounted a few times prior to that fsck. Is this cause for alarm? Should I scrap the drive on principle?

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• My (C:) drive changed from Basic to Dynamic, is this bad?

  - by bbman225

  I'm really worried here. My computer still runs, so I take this as a good sign, however let me explain my situation: I am trying to install Ubuntu Linux, and the installer was having problems, so I went back into the partitioning tool on my Windows 7 (after having successfully shrunken my C drive and created 55 GB unallocated space) and I attempted to create a new partition out of the 55 GB and make it a simple NTFS drive so that I could let the installer wipe it clean again and format it in whatever file system it prefers. Now, after googling it and running through the process I noticed that all of my drives, including the C drive and the one I just made changed from type "Basic" to type "Dynamic." What is a dynamic drive and should I be worried?

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• Why does my browser take me to Scour.com? (redirect virus)

  - by Paula DiTallo

  The "scour" or Rootkit.Win32.TDSS virus has a long history which can be found here: http://en.wikipedia.org/wiki/Scour Here is the primary symptom: after searching for something in your web browser using google, one of the results that you click on redirects you to scour.com. If you've executed ClamWin, Malwarebytes, McAfee, Norton, etc. to find and isolate the virus without any luck--this isn't really a surprise, since this virus attaches to existing system drivers. I only know of one reliable package that will remove this without ill effects--like adding new spyware. This package is called TDSSKiller. I have seen multiple websites that claim to have this software available, but the one that I know is reliable is located here: http://support.kaspersky.com/viruses/solutions?qid=208280684 Once you go to Kaspersky's tech support site, the TDSSKiller zip file is available for downloading. When you execute this software, you will be able to "cure" or repair the infected driver. Remember to jot down the name of the driver for future reference--should you need to reinstall the driver from a "same-as" working computer, or your install disk if the repair is ineffective. The driver that happened to get infected on my computer was the tcpip.sys driver. This caused my win sockets to loose their ip addresses. In most other instances, less critical drivers such as HDAudBus.sys are infected. In my case, I was not through correcting my computer problems until I corrected the broken WinSock issue and loaded an earlier version of the tcpip.sys driver from: C:\WINDOWS\ServicePackFiles\i386 which I placed in: C:\WINDOWS\system32\drivers Don't forget to reboot your computer after your repair! Once you download TDSSKiller and cure/repair your infected driver(s), the redirect on google searches should disappear .

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• How to convert rmvb to mp4? (or, why ffmpeg doesn't work?)

  - by Tom Brito

  Hi, I'm trying to use this script to convert an rmvb video to mp4, but I'm having problems with the ffmpeg. In apt-get there's only ffmpeg0 and ffmpeg-dev, I installed both, but the script doesn't work, it's saying that ffmpeg was not found. Any hint on this? --update The script I'm talking about: #!/bin/bash tipo=$1 arqv=$2 resolucao=$3 tipoarq=$4 help() { clear echo "Convertor de Vídeos para MP4" echo "Parametro 1 = Tipo: (A - Arquivo/D - Diretório)" echo "Parametro 2 = Arquivo/Caminho" echo "Parametro 3 = Resolução" echo "Parametro 4 = Tipo de Arquivos de Entrada (rmvb, avi, mpeg)" } if [ "$tipo" = "" -o "$arqv" = "" -o "$resolucao" = "" -o "$tipoarq" = "" ]; then help; exit fi if [ "$tipo" = "D" ]; then count=`ls "$arqv"/*.$tipoarq | wc -l` else count=1 fi echo "$count arquivos encontrados para converter." x=0 while [ ! $x -ge $count ]; do x=`echo $x + 1 | bc` if [ "$tipo" = "D" ]; then nome=`ls "$arqv"/*.$tipoarq | head -n $x | tail -n 1` else nome=$arqv fi echo "Convertendo $nome ..." ffmpeg -i "$nome" -acodec libfaac -ab 128kb -vcodec mpeg4 -b 1200kb -mbd 2 -cmp 2 -subcmp 2 -s $resolucao "`echo $nome | sed "s/\.$tipoarq//g"`".mp4 done exit --update Using WinFF it gives: Unknown encoder 'libx264' I've installed both the existing packages libx264-67 and libx264-dev, but none solved. Looking for more alternatives...

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• chunked response in nginx not working

  - by Dean Hiller

  I ran into this post which shows my problem EXACTLY http://nginx.org/en/docs/faq/chunked_encoding_from_backend.html BUT browsers are using http 1.1 these days so I really don't understand. Our backend is the playframework and I don't mind fixing it but I don't really understand what is not working ESPECIALLY since firefox, safari, chrome ALL download the response just fine with no problems. ONLY when we stick NGINX in the middle do things break and we end up with extra data in our json responses. Any idea how to fix this? as the doc above just seems wrong since we are now on later versions of http PLUS the browsers seem to work just fine. thanks, Dean

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• OSB and Ubuntu 10.04 - Too Many Open Files

  - by jeff.x.davies

  When installing the latest Oracle Service Bus (11gR1PS3) onto my Ubuntu 10.04 system, the Eclipse IDE was complaining about there being too many open files. The Oracle Service Bus and the Oracle Enterprise Pack for Eclipse (aka OEPE) do make use of ALOT of files. By default, Ubuntu will restrict each user to 1024 open files. A much more realistic number for OSB development is 4096. Changing the file limit in Ubuntu is fairly simple (if arcane). You will need to modify two different files and then restart your server. First, you need to modify the limits.conf file as the root user. Open a terminal window and enter the following command: sudo gedit /etc/security/limits.conf Add the following 2 lines to the file. The asterisk simply means that the rule will apply to all users. * soft nofile 4096 * hard nofile 4096 Save your changes and close gedit. The second file to change is the common-session file. Use the following command: sudo gedit /etc/pam.d/common-session Add the following line: session required pam_limits.so Save the file and exit gedit. Restart your machine. You shouldn't have any more problems with too many open files anymore.

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• internet connection problem related to a recurring registry error

  - by mats

  I have a Windows XP desktop system connected to the Internet via ethernet LAN. Initially, none of my browsers were connecting to the Internet, but I was able to update my antivirus software and all of my connection settings were perfect. I was able to solve the problem by running WinSock XP, which apparently fixes connection problems that have been caused by registry issues. My problem now is that every time I shut down the machine, the problem comes back (Internet browsers won't connect). Does anyone have any ideas/suggestions on this? Thanks

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