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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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  • Use Those Schemas, People!

    - by BuckWoody
    Database Schemas are just containers – they aren’t users or anything else – think of a sub-directory on the hard drive. In early versions of SQL Server we “hid” schemas, placing all objects under “dbo”, which gave the erroneous perception that Schemas are users. In SQL Server 2005, we “un-hid” or re-introduced schemas within the database. Users can have a default schema (a place where their new objects go), you can add new schemas and transfer objects between them, and they have many other benefits. But I still see a lot of applications, developed by shops I know as well as vendors, that don’t make use of a Schema. Everything is piled under dbo. I completely understand this – since permissions can be granted to a schema, they feel a lot like a user, so it’s just easier not to worry about both users and schemas when you create a database. But if you’ll use them properly you can make your application more understandable and portable. You should at least take a few minutes and read more about them – you owe it to your users: http://msdn.microsoft.com/en-us/library/ms190387.aspx Share this post: email it! | bookmark it! | digg it! | reddit! | kick it! | live it!

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  • Build & Install Ruby Gems with Rake

    - by kerry
    Are you using rake to build your gems?  Have you ever wished there were an install task to install it to your machine?  I, for one, have written something like this a few times: 1: desc 'Install the gem' 2: task :install do 3: exec 'gem install pkg/goodies-0.1.gem' 4: end 5:  That is pretty straightforward.  However, this will not work under JRuby on Mac where the command should be ‘jgem’.  So we can enhance it to detect the platform, and host OS: 1: desc 'Install the gem' 2: task :install do 3: executable = RUBY_PLATFORM[/java/] && Config::CONFIG[/darwin/] ? 'jgem' : 'gem' 4: exec "#{executable} install pkg/goodies-0.1.gem" 5: end This is a little better.  I am still not comfortable with the sloppiness of building a shell command and executing it though.  It is possible to do it with strictly Ruby.  I am also going namespace it to integrate better with the GemPackageTask.  Now it will be accessed via ‘rake gem:install’ 1: desc 'Install the gem' 2: namespace 'gem' do 3: task :install do 4: Gem::Installer.new('pkg/goodies-0.1.gem').install 5: end 6: end   I have included this in the goodies gem 0.2, so go ahead and install it!  ‘gem install goodies’

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  • why not use unmanaged safe code in c#

    - by user613326
    There is an option in c# to execute code unchecked. It's generally not advised to do so, as managed code is much safer and it overcomes a lot of problems. However I am wondering, if you're sure your code won't cause errors, and you know how to handle memory then why (if you like fast code) follow the general advice? I am wondering this since I wrote a program for a video camera, which required some extremely fast bitmap manipulation. I made some fast graphical algorithms myself, and they work excellent on the bitmaps using unmanaged code. Now I wonder in general, if you're sure you don't have memory leaks, or risks of crashes, why not use unmanaged code more often ? PS my background: I kinda rolled into this programming world and I work alone (I do so for a few years) and so I hope this software design question isn't that strange. I don't really have other people out there like a teacher to ask such things.

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  • how to write high quality GUI software with qt?

    - by Opetmar
    I want to write a project using QT library, so after learning the library and mastering it how should I start, what other libraries or things that I should learn? are there any other tools that will help me during the development or tools well help the end user to install the software and using it? What are the things that I should be aware? what are the things that I should avoid so it can run efficiently?

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  • Zune API Library for Ruby

    - by kerry
    Those of you who know me, know my favorite music player is the Zune. For some reason it seems most of my spare time lately seems to be creating Zune API libraries for different languages (I have a PHP one as well).  Here’s another one for Ruby!  If you use it, let me know.  I would love to hear what people are working on. It’s hosted at github, and very easy to use. zune_card = Zune::ZuneCard.for('a_zune_tag') Checkout the README for deets on what fields the object will have.

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  • Why does F. Wagner consider "NOT (AI_LARGER_THAN_8.1)" to be ambiguous?

    - by oosterwal
    In his article on Virtual Environments (a part of his VFSM specification method) Ferdinand Wagner describes some new ways of thinking about Boolean Algebra as a software design tool. On page 4 of this PDF article, when describing operators in his system he says this: Control statements need Boolean values. Hence, the names must be used to produce Boolean results. To achieve this we want to combine them together using Boolean operators. There is nothing wrong with usage of AND and OR operators with their Boolean meaning. For instance, we may write: DI_ON OR AI_LARGER_THAN_8.1 AND TIMER_OVER to express the control situation: digital input is on or analog input is larger than 8.1 and timer is over. We cannot use the NOT operator, because the result of the Boolean negation makes sense only for true Boolean values. The result of, for instance, NOT (AI_LARGER_THAN_8.1) would be ambiguous. If "AI_LARGER_THAN_8.1" is acceptable, why would he consider "NOT (AI_LARGER_THAN_8.1)" to be ambiguous?

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  • Looking for a light weight note program.

    - by Erin
    This might belongs on superuser but for me it's part of programming so i will ask it here. I find I use notepad to keep chunks of data that are important but not important enough to keep in my head. The one problem with this is I end up with a lot of files on my desktop that I don't know what they are for, or I don't save the file and my computer gets rebooted for some reason. So that big ramble leads to the question. I am looking for a note taking system that is light weight and easy to manage. I would rather it not be a huge application like onenote but if that is what you are using and is is working well for you could you explain how you are doing it? Thanks Erin.

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  • Analysing Group & Individual Member Performance -RUP

    - by user23871
    I am writing a report which requires the analysis of performance of each individual team member. This is for a software development project developed using the Unified Process (UP). I was just wondering if there are any existing group & individual appraisal metrics used so I don't have to reinvent the wheel... EDIT This is by no means correct but something like: Individual Contribution (IC) = time spent (individual) / time spent (total) = Performance = ? (should use individual contribution (IC) combined with something to gain a measure of overall performance).... Maybe I am talking complete hash and I know generally its really difficult to analyse performance with numbers but any mathematicians out there that can lend a hand or know a somewhat more accurate method of analysing performance than arbitrary marking (e.g. 8 out 10)

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  • How do I explain the importance of NUNIT Test cases to my Colleagues [duplicate]

    - by JNL
    This question already has an answer here: How to explain the value of unit testing 6 answers I am currently working in Software Development for applications including lot of Mathematical Calculations. As a result there are lot of test cases that we need to consider. We donot have any NUNIT Test case system, I am wonderring how should I get the advantages of implementing the NUNIT testing in front of my colleagues and my boss. I am pretty sure, it would be of great help for our team. Any help regarding the same, will be higly appreciated.

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  • Automate #include refactoring in C++ [on hold]

    - by Mikhail
    I have a big project with hundreds of files. And as it often happens to C++ projects, #include directives are in messed up. I want to refactor them to increase clarity, decrease compilation time and simplify analysis. For each .h file I want to make sure that: It have #include directives only for types it is using But it have only forward declarations of types that are used as T* or T& For each .cpp file I want to make sure that: It have #include directives only for types it is using and not already included by another headers (no indirect includes when possible) I'm looking for a tool which will help me to automate this refactoring. For now I only know of tools that helps to remove redundant includes, they are many: PC-lint include-what-you-use cppclean ProFactor IncludeManager But I know of no tools to help me to move necessary includes in .h files or replace includes with forward declarations. Any ideas? Tools for Windows and Visual Studio are preferred. Update. Considered to be off-topic. Please, follow the link on Software Recommendations http://softwarerecs.stackexchange.com/q/4461/3331

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  • Down Time

    - by andyleonard
    Introduction Every now and then, everyone needs a break. How do we respond when community leaders need a break? How should we respond? It's Normal People are cyclic animals - humans are diurnal by nature. We eat at regular intervals and are most comfortable when things go according to schedule. This is the lizard brain in action. So it's perfectly normal for community volunteers and leaders to engage in cycles of activity and inactivity in the community. It is, after all, another cycle. We rely on...(read more)

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  • More Tables or More Databases?

    - by BuckWoody
    I got an e-mail from someone that has an interesting situation. He has 15,000 customers, and he asks if he should have a database for their data per customer. Without a LOT more data it’s impossible to say, of course, but there are some general concepts to keep in mind. Whenever you’re segmenting data, it’s all about boundary choices. You have not only boundaries around how big the data will get, but things like how many objects (tables, stored procedures and so on) that will be involved, if there are any cross-sections of data (do they share location or product information) and – very important – what are the security requirements? From the answer to these types of questions, you now have the choice of making multiple tables in a single database, or using multiple databases. A database carries some overhead – it needs a certain amount of memory for locking and so on. But it has a very clean boundary – everything from objects to security can be kept apart. Having multiple users in the same database is possible as well, using things like a Schema. But keeping 15,000 schemas can be challenging as well. My recommendation in complex situations like this is similar to a post on decisions that I did earlier – I lay out the choices on a spreadsheet in rows, and then my requirements at the top in the columns. I  give each choice a number based on how well it meets each requirement. At the end, the highest number wins. And many times it’s a mix – perhaps this person could segment customers into larger regions or districts or products, in a database. Within that database might be multiple schemas for the customers. Of course, he needs to query across all customers, that becomes another requirement. Share this post: email it! | bookmark it! | digg it! | reddit! | kick it! | live it!

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  • My Last "Catch-Up" Post for 2010 Content

    - by KKline
    I did a lot of writing in 2010. Unfortunately, I didn't do a good job of keeping all of that writing equally distributed throughout all of the channels where I'm active. So here are a few more posts from my blog, put on-line during the months of November and December 2010, that I didn't get posted here on SQLBlog.com: 1. It's Time to Upgrade! So many of my customers and many of you, dear readers, are still on SQL Server 2005. Join Kevin Kline , SQL Server MVP and SQL Server Technology Strategist...(read more)

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  • Complete RESTful API debugging/testing tool

    - by vartec
    I'm looking for the most complete tool, preferably portable GUI or browser plugin to test RESTful API. What I need is: GET/POST/DELETE/PUT support multiple file uploads as fields (multipart/form-data) file uploads as body Extra points for: possibility to save multiple configurations and use them to pre-fill parameters OAuth support nice JSON response formatting Currently I'm using 3 tools: Chrome REST Console extension — My favorite, very nicely done. Has OAuth. However the functionality missing for me is sending file as a body of the request; Cannot send multiple files; Firefox Poster add-on — Quite nice, but the functionality it's missing for file as POST fields parameters; Also cannot send multiple files; cURL — can do anything, but it's quite tedious to use it from command line.

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  • Seeking a free Lint for C which programmers will *want* to use

    - by Mawg
    When I try to persuade others to Lint their code I always get excuses - too difficult to set up, too difficult to understand, false positives, etc (most of which translates to too lazy, too stupid or too afraid of new things). Is there any way that I can make Linting easier? We code in C using Netbeans. Can I incorporate Splint into Netbeans? I did find a Splint GUI which was quite good, but there was no way to lint a directory tree. Any ideas? Thanks in advance

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  • Solaris Day in NY and Boston

    - by unixman
    Hey all, -- We're hosting yet another Solaris event in New York -- this one will be on November 29th and focused on some key in-depth technologies in Solaris 11, which had just been released earlier this month.  Speakers include Dave Miner, Glenn Brunette and Jeff Victor.  It starts in the morning and goes through lunch; check out the agenda from the below link. Topics include: new and improved installation and package management experience, virtualization, ZFS and security.Please check it out and come join us! The RSVP link is belowhttp://www.oracle.com/go/?&Src=7239490&Act=34&pcode=NAFM10128512MPP016 Additionally, if you are in the Boston area, an identical event will be held in Burlington the following day, on November 30th. The RSVP link for that is http://www.oracle.com/us/dm/h2fy11/21285-nafm10128512mpp013-oem-525338.html Hope to see you there!

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  • Starting this week: Dublin, Maidenhead, and London

    - by KKline
    This might be most most overcommitted four-week period of time ever in my life. I’m tired just thinking about it! Not only am I traveling internationally and speaking over the next few weeks, I’m also helping on two book projects, learning some new applications from Quest Software, and helping on a small Transact-SQL refactoring project. Swag on hand? I’ve got a special printing of 500 video training DVDs for this trip: SQL Server Training on DMVs Performance Monitor and Wait Events Plus, I’ll have...(read more)

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  • Software/Hardware Development?

    - by SwarthyMantooth
    Sincere apologies if this is the wrong place to ask this. I am a computer engineering student and I'm currently on my first co-op of the required 5 I have to take, and I've noticed that all I'm really given is software engineering jobs. I love developing software, but I don't want to lose out on the hardware aspect of computers, as having a hybrid knowledge of the two is why I chose this major in the first place. So I guess my question is: Are there any software engineering jobs that still allow you to handle and interface with hardware on a very low level? Or am I to be forced to choose which focus I love more?

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  • Finding Telecommuting Opportunities as a Recent College Graduate

    - by stanigator
    Reading the answers to hiring practices of remote vs. local employees and freelance programming sites, I would like to add this question to the mix. I am a recent college graduate from an electrical engineering background with 2 years worth of work terms in programming (C, C++, VBA, Matlab, etc.) while I was still in school. While I am interested in learning other software tools (such as Python, Ruby on Rails, Javascript, etc.), I want to use the tools I have now in a telecommuting role while I grow my toolset. Despite having 2 years of work experience (and I've lost track of when I have started programming), my status as a recent college graduate may be an obstacle of my credibility to compete for telecommuting (or in fact any) programming opportunities. I don't know how I can go about finding telecommute programming opportunities for someone with my situation. Overall, many of previous places I've worked at liked my work. What are your suggestions? Thanks in advance!

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  • Finding header files

    - by rwallace
    A C or C++ compiler looks for header files using a strict set of rules: relative to the directory of the including file (if "" was used), then along the specified and default include paths, fail if still not found. An ancillary tool such as a code analyzer (which I'm currently working on) has different requirements: it may for a number of reasons not have the benefit of the setup performed by a complex build process, and have to make the best of what it is given. In other words, it may find a header file not present in the include paths it knows, and have to take its best shot at finding the file itself. I'm currently thinking of using the following algorithm: Start in the directory of the including file. Is the header file found in the current directory or any subdirectory thereof? If so, done. If we are at the root directory, the file doesn't seem to be present on this machine, so skip it. Otherwise move to the parent of the current directory and go to step 2. Is this the best algorithm to use? In particular, does anyone know of any case where a different algorithm would work better?

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  • PASS Summit Location Redux

    - by andyleonard
    Introduction To quote Ronald Reagan, " There you go again ." The Professional Association for SQL Server (PASS) is considering locations for future PASS Summits. The apparent answer is: You Can Have The Summit Anywhere You Want... ... as long as it's in Seattle. PASS conducted a survey on this about a year ago, and I commented on the results and PASS' (mis-)interpretation of said results in a post entitled On PASS Summit Locations, Time Will Tell . "It's About Community" I think every member of the...(read more)

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  • What is the Best way to learn c# programming and capability to do anything with C#?

    - by MSU
    I browsed all the answers given in Stackoverflow,i couldn't find my answer that's why i am writing this, so please don't mark this a duplicate. My case i want to get the capability of doing anything in C# from building applications to solving problems. I searched for and tried to read books. Then one of the experts said, reading books will not make any good for you, for learning you have to solve problems i.e. real world problems in C#, he gave me some sample problems, which i previously did in C++, i started doing, but the thing is that i know the internal logic of solving the problem or the algorithm to solve. But i don't know how to imepelement them using C# efficiently. so, the gap is, i can't think in C#, I know the message to passed but don't the exact way to pass it. I did a program to solve a problem, then find out there are much easier ways of doing it wherever i was doing it in tougher way. So, can you guys(C# experts) please enlighten me, what i need to get hold of the language and get the ability to code in C# proficiently?

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