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  • What should I do with my programming project?

    - by rambodash
    I've been working on a top secret project that has potential of becoming very popular. No one has done anything like it. The problem is I have no motivation to finish it, and its about 70% done. I also don't have the ability to sell & market the product. The documentation is a pain to write. I just want to finish the project , receive my reward and move on to other things. I know that if I were to release it as a product I'm going to have to do support, and do bug fixes. No thank you! I've thought of making it open source but I'm failing to see the benefits. My hard work is just going to be up for grabs isn't it? How can I abandon my project whilst getting rewarded for the work I've done so far?

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  • What are the most difficult aspects of project management in Software Engineering?

    - by Jamie Chapman
    I have been asked to provide a brief summary of the what the most difficult aspects of being a project manager of a software engineering project. However, I have no experience of this as I'm still at University and have no "hands on" experience of project management. I was hoping that someone on SO would be able to provide some insight based on their experience. What are the most difficult aspects of project management in Software Engineering?

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  • MVC2 Data Annotation Buddy Classes Doesn't seem to work when Classes and EOM Model is in separate Project

    - by Danish Ali
    Dear All Iam new to MVC2 and having a little problem with implementing validation via buddy classes. Iam using Repository pattern with dependency injection. My Entity Object Model is in Data Layer Project and Buddy Classes are in Business Layer project and MVC 2 Project as a separate Presentation Layer Project. Can any one help me out with implementing Buddy Classes in this Architecture. Thanks and Regards Dani

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  • Authoritative sources about Database vs. Flatfile decision

    - by FastAl
    <tldr>looking for a reference to a book or other undeniably authoritative source that gives reasons when you should choose a database vs. when you should choose other storage methods. I have provided an un-authoritative list of reasons about 2/3 of the way down this post.</tldr> I have a situation at my company where a database is being used where it would be better to use another solution (in this case, an auto-generated piece of source code that contains a static lookup table, searched by binary sort). Normally, a database would be an OK solution even though the problem does not require a database, e.g, none of the elements of ACID are needed, as it is read-only data, updated about every 3-5 years (also requiring other sourcecode changes), and fits in memory, and can be keyed into via binary search (a tad faster than db, but speed is not an issue). The problem is that this code runs on our enterprise server, but is shared with several PC platforms (some disconnected, some use a central DB, etc.), and parts of it are managed by multiple programming units, parts by the DBAs, parts even by mathematicians in another department, etc. These hit their own platform’s version of their databases (containing their own copy of the static data). What happens is that every implementation, every little change, something different goes wrong. There are many other issues as well. I can’t even use a flatfile, because one mode of running on our enterprise server does not have permission to read files (only databases, and of course, its own literal storage, e.g., in-source table). Of course, other parts of the system use databases in proper, less obscure manners; there is no problem with those parts. So why don’t we just change it? I don’t have administrative ability to force a change. But I’m affected because sometimes I have to help fix the problems, but mostly because it causes outages and tons of extra IT time by other programmers and d*mmit that makes me mad! The reason neither management, nor the designers of the system, can see the problem is that they propose a solution that won’t work: increase communication; implement more safeguards and standards; etc. But every time, in a different part of the already-pared-down but still multi-step processes, a few different diligent, hard-working, top performing IT personnel make a unique subtle error that causes it to fail, sometimes after the last round of testing! And in general these are not single-person failures, but understandable miscommunications. And communication at our company is actually better than most. People just don't think that's the case because they haven't dug into the matter. However, I have it on very good word from somebody with extensive formal study of sociology and psychology that the relatively small amount of less-than-proper database usage in this gigantic cross-platform multi-source, multi-language project is bureaucratically un-maintainable. Impossible. No chance. At least with Human Beings in the loop, and it can’t be automated. In addition, the management and developers who could change this, though intelligent and capable, don’t understand the rigidity of this ‘how humans are’ issue, and are not convincible on the matter. The reason putting the static data in sourcecode will solve the problem is, although the solution is less sexy than a database, it would function with no technical drawbacks; and since the sharing of sourcecode already works very well, you basically erase any database-related effort from this section of the project, along with all the drawbacks of it that are causing problems. OK, that’s the background, for the curious. I won’t be able to convince management that this is an unfixable sociological problem, and that the real solution is coding around these limits of human nature, just as you would code around a bug in a 3rd party component that you can’t change. So what I have to do is exploit the unsuitableness of the database solution, and not do it using logic, but rather authority. I am aware of many reasons, and posts on this site giving reasons for one over the other; I’m not looking for lists of reasons like these (although you can add a comment if I've miss a doozy): WHY USE A DATABASE? instead of flatfile/other DB vs. file: if you need... Random Read / Transparent search optimization Advanced / varied / customizable Searching and sorting capabilities Transaction/rollback Locks, semaphores Concurrency control / Shared users Security 1-many/m-m is easier Easy modification Scalability Load Balancing Random updates / inserts / deletes Advanced query Administrative control of design, etc. SQL / learning curve Debugging / Logging Centralized / Live Backup capabilities Cached queries / dvlp & cache execution plans Interleaved update/read Referential integrity, avoid redundant/missing/corrupt/out-of-sync data Reporting (from on olap or oltp db) / turnkey generation tools [Disadvantages:] Important to get right the first time - professional design - but only b/c it's meant to last s/w & h/w cost Usu. over a network, speed issue (best vs. best design vs. local=even then a separate process req's marshalling/netwk layers/inter-p comm) indicies and query processing can stand in the way of simple processing (vs. flatfile) WHY USE FLATFILE: If you only need... Sequential Row processing only Limited usage append only (no reading, no master key/update) Only Update the record you're reading (fixed length recs only) Too big to fit into memory If Local disk / read-ahead network connection Portability / small system Email / cut & Paste / store as document by novice - simple format Low design learning curve but high cost later WHY USE IN-MEMORY/TABLE (tables, arrays, etc.): if you need... Processing a single db/ff record that was imported Known size of data Static data if hardcoding the table Narrow, unchanging use (e.g., one program or proc) -includes a class that will be shared, but encapsulates its data manipulation Extreme speed needed / high transaction frequency Random access - but search is dependent on implementation Following are some other posts about the topic: http://stackoverflow.com/questions/1499239/database-vs-flat-text-file-what-are-some-technical-reasons-for-choosing-one-over http://stackoverflow.com/questions/332825/are-flat-file-databases-any-good http://stackoverflow.com/questions/2356851/database-vs-flat-files http://stackoverflow.com/questions/514455/databases-vs-plain-text/514530 What I’d like to know is if anybody could recommend a hard, authoritative source containing these reasons. I’m looking for a paper book I can buy, or a reputable website with whitepapers about the issue (e.g., Microsoft, IBM), not counting the user-generated content on those sites. This will have a greater change to elicit a change that I’m looking for: less wasted programmer time, and more reliable programs. Thanks very much for your help. You win a prize for reading such a large post!

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  • How do I prove I should put a table of values in source code instead of a database table?

    - by FastAl
    <tldr>looking for a reference to a book or other undeniably authoritative source that gives reasons when you should choose a database vs. when you should choose other storage methods. I have provided an un-authoritative list of reasons about 2/3 of the way down this post.</tldr> I have a situation at my company where a database is being used where it would be better to use another solution (in this case, an auto-generated piece of source code that contains a static lookup table, searched by binary sort). Normally, a database would be an OK solution even though the problem does not require a database, e.g, none of the elements of ACID are needed, as it is read-only data, updated about every 3-5 years (also requiring other sourcecode changes), and fits in memory, and can be keyed into via binary search (a tad faster than db, but speed is not an issue). The problem is that this code runs on our enterprise server, but is shared with several PC platforms (some disconnected, some use a central DB, etc.), and parts of it are managed by multiple programming units, parts by the DBAs, parts even by mathematicians in another department, etc. These hit their own platform’s version of their databases (containing their own copy of the static data). What happens is that every implementation, every little change, something different goes wrong. There are many other issues as well. I can’t even use a flatfile, because one mode of running on our enterprise server does not have permission to read files (only databases, and of course, its own literal storage, e.g., in-source table). Of course, other parts of the system use databases in proper, less obscure manners; there is no problem with those parts. So why don’t we just change it? I don’t have administrative ability to force a change. But I’m affected because sometimes I have to help fix the problems, but mostly because it causes outages and tons of extra IT time by other programmers and d*mmit that makes me mad! The reason neither management, nor the designers of the system, can see the problem is that they propose a solution that won’t work: increase communication; implement more safeguards and standards; etc. But every time, in a different part of the already-pared-down but still multi-step processes, a few different diligent, hard-working, top performing IT personnel make a unique subtle error that causes it to fail, sometimes after the last round of testing! And in general these are not single-person failures, but understandable miscommunications. And communication at our company is actually better than most. People just don't think that's the case because they haven't dug into the matter. However, I have it on very good word from somebody with extensive formal study of sociology and psychology that the relatively small amount of less-than-proper database usage in this gigantic cross-platform multi-source, multi-language project is bureaucratically un-maintainable. Impossible. No chance. At least with Human Beings in the loop, and it can’t be automated. In addition, the management and developers who could change this, though intelligent and capable, don’t understand the rigidity of this ‘how humans are’ issue, and are not convincible on the matter. The reason putting the static data in sourcecode will solve the problem is, although the solution is less sexy than a database, it would function with no technical drawbacks; and since the sharing of sourcecode already works very well, you basically erase any database-related effort from this section of the project, along with all the drawbacks of it that are causing problems. OK, that’s the background, for the curious. I won’t be able to convince management that this is an unfixable sociological problem, and that the real solution is coding around these limits of human nature, just as you would code around a bug in a 3rd party component that you can’t change. So what I have to do is exploit the unsuitableness of the database solution, and not do it using logic, but rather authority. I am aware of many reasons, and posts on this site giving reasons for one over the other; I’m not looking for lists of reasons like these (although you can add a comment if I've miss a doozy): WHY USE A DATABASE? instead of flatfile/other DB vs. file: if you need... Random Read / Transparent search optimization Advanced / varied / customizable Searching and sorting capabilities Transaction/rollback Locks, semaphores Concurrency control / Shared users Security 1-many/m-m is easier Easy modification Scalability Load Balancing Random updates / inserts / deletes Advanced query Administrative control of design, etc. SQL / learning curve Debugging / Logging Centralized / Live Backup capabilities Cached queries / dvlp & cache execution plans Interleaved update/read Referential integrity, avoid redundant/missing/corrupt/out-of-sync data Reporting (from on olap or oltp db) / turnkey generation tools [Disadvantages:] Important to get right the first time - professional design - but only b/c it's meant to last s/w & h/w cost Usu. over a network, speed issue (best vs. best design vs. local=even then a separate process req's marshalling/netwk layers/inter-p comm) indicies and query processing can stand in the way of simple processing (vs. flatfile) WHY USE FLATFILE: If you only need... Sequential Row processing only Limited usage append only (no reading, no master key/update) Only Update the record you're reading (fixed length recs only) Too big to fit into memory If Local disk / read-ahead network connection Portability / small system Email / cut & Paste / store as document by novice - simple format Low design learning curve but high cost later WHY USE IN-MEMORY/TABLE (tables, arrays, etc.): if you need... Processing a single db/ff record that was imported Known size of data Static data if hardcoding the table Narrow, unchanging use (e.g., one program or proc) -includes a class that will be shared, but encapsulates its data manipulation Extreme speed needed / high transaction frequency Random access - but search is dependent on implementation Following are some other posts about the topic: http://stackoverflow.com/questions/1499239/database-vs-flat-text-file-what-are-some-technical-reasons-for-choosing-one-over http://stackoverflow.com/questions/332825/are-flat-file-databases-any-good http://stackoverflow.com/questions/2356851/database-vs-flat-files http://stackoverflow.com/questions/514455/databases-vs-plain-text/514530 What I’d like to know is if anybody could recommend a hard, authoritative source containing these reasons. I’m looking for a paper book I can buy, or a reputable website with whitepapers about the issue (e.g., Microsoft, IBM), not counting the user-generated content on those sites. This will have a greater change to elicit a change that I’m looking for: less wasted programmer time, and more reliable programs. Thanks very much for your help. You win a prize for reading such a large post!

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  • Is there a javascript library that contains a rich set of very high level commonly used functions?

    - by bobo
    I find that many high level functions are missing in most well-known javascript libraries such as jquery, YUI...etc. Taking string manipulation as an example, startsWith, endsWith, contains, lTrim, rTrim, trim, isNullOrEmpty...etc. These function are actually very common ones. I would like to know if there exists a javascript library/ plugin of a javascript library that fills these gaps (including but not limited to string manipulation)? It would be great if the library does not override the prototype.

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  • How best to pre-install OR pre-load OR cache Java Script library to optimize performance.

    - by Kabeer
    Hello. I am working for an intranet application. Therefore I have some control on the client machines. The Java Script library I am using is somewhat big in size. I would like to pre-install OR pre-load OR cache the Java Script library on each machine (each browser as well) so that it does not travel for each request. I know that browsers do cache a Java Script library for subsequent requests but I would like the library to be cached once so all subsequent requests, sessions and users. What is the best mechanism to achieve this?

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  • How best to pre-install OR pre-load OR cache JavaScript library to optimize performance?

    - by Kabeer
    Hello. I am working for an intranet application. Therefore I have some control on the client machines. The JavaScript library I am using is somewhat big in size. I would like to pre-install OR pre-load OR cache the JavaScript library on each machine (each browser as well) so that it does not travel for each request. I know that browsers do cache a JavaScript library for subsequent requests but I would like the library to be cached once for all subsequent requests, sessions and users. What is the best mechanism to achieve this?

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  • how to make an import library

    - by user295030
    a requirement was sent to me below: API should be in the form of static library. company xxx will link the library into a third party application to prevent any possible exposure of the code(dll) could they mean an import library? An import library is a library that automates the process of loading and using a dynamic library. On Windows, this is typically done via a small static library (.lib) of the same name as the dynamic library (.dll). The static library is linked into the program at compile time, and then the functionality of the dynamic library can effectively be used as if it were a static library. this might be what they might be eluding to.....I am not sure how to make this in vs2008 . Additional facts: I have a static lib that i use in my current application. Now, I have to convert my app that uses that static lib into an import lib so that they can use a third party prog to access the API's they providede me which in turn will use that static lib i am using. I hope I am clearly explaining this. I am just not sure how to go about it in vs2008. I am looking for specific steps to do this. I already have the coding done. Just need to convert it into the form they are asking and I have to provide the API they want. Other than that then I need to create a test prog which will act as that third party prog so I can make sure my import library works.

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  • How to Create a Folder in the Current Document Library if it's not already present?

    - by Rosh Malai
    All I want to do is to create a folder "MetaFolder" inside a document library. User can be on any document library and I would like to create this folder after item is added (so on itemAdded event handler). I do NOT want workflow so please dont suggest workflow. This code works but I have to hardcode the url but need to get url from current url. also need to verify the folder uHippo does not exists in the current doc library... public override void ItemAdded(SPItemEventProperties properties) { base.ItemAdded(properties); using (SPSite currentSite = new SPSite(properties.WebUrl)) using (SPWeb currentWeb = currentSite.OpenWeb()) { // This code works and creates Folder in the "My TEST Doc library" //SPList docLib = currentWeb.Lists["My TEST Doc Library"]; //SPListItem folder = docLib.Folders.Add(docLib.RootFolder.ServerRelativeUrl, SPFileSystemObjectType.Folder, "My folder"); //folder.Update(); string doclibname = "Not a doclib"; //SPList doclibList = currentWeb.GetList(HttpContext.Current.Request.RawUrl); // NOT WORKING. Tried properties.weburl SPList doclibList = currentWeb.GetListFromUrl("https://mycompanyportal/sites/testsitecol/testwebsite/My%20TEST%20Doc%20Library/Forms/AllItems.aspx"); if (null != doclibList) { doclibname = doclibList.Title; } // this section also not working. // getting Object reference not set to an instance of an object or something like that. //if (currentWeb.GetFolder("uHippo").Exists == false) //{ SPListItem folder = doclibList.Folders.Add(doclibList.RootFolder.ServerRelativeUrl, SPFileSystemObjectType.Folder, "uHippo"); folder.Update(); //} } }

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  • Which project management software for technophobes who've never worked with something like that?

    - by Ernst
    Hi, Our director has asked me to get something to manage projects. Note that so far we haven't used anything of the sort. I did not get very clear instructions yet, probably because she doesn't know exactly what we need either. My guess is, we'll only find out while using something. I've looked at some, openworkbench, ganttproject, and microsoft project. The latter has the advantage of easy importing of users from exchange, are there others that do that (even if not directly, easily)? I don't think it's a critical requirement though. We're using some other custom software where I have to add users manually anyway and we're small enough that it's maybe once a month that I have to add or remove a user. In any case, I'm not in favour of buying anything, since I'm skeptic about us actually succeeding in putting it to good use, and even if we do, we will only during usage discover what we need. We're also not a tech shop, most people vary from not very technically adept to technophobic. This means we need something very userfriendly. I prefer to stay away from online solutions, since we deal with sensitive information and I prefer to keep that in house, but I guess it would be acceptable for the trial period. An intranet site is an option though, but preferably something that is easy to set up with IIS. Xplanner plus and redmine I found too hard to set up for this experiment. Some other options I haven't yet tried to install, but which look to complex for our technophobes: Endeavour Software Project Management, Project-Open, Trac. Any suggestions? Thanks, Ernst

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  • Re-add missing project without having to re-add it to all projects referencing it

    - by coffeeaddict
    Lets say you open a .NET solution (mine being VS 2010) after you just moved your entire folder to some new location locally. Now one of the projects that was being referenced in that solution is not there and so when you launch VS, it naturally tells you that the project is missing and therefore as always you see the project greyed out in Solution Explorer. Ok, well I can't go re-add that project (specify a different path for where that project lives) unless I remove the missing project reference and then try to re-add it back to the solution. But how can I reassociate a project without losing all references in other projects that were referencing that missing project? Is this possible? Otherwise every time I re-add that missing project, I end up having to go through about 8 projects of mine that are referencing it and re-reference it for each one of those projects which is tedious. I guess it makes sense since each project was referencing that missing project at that old path so it would break it there as well but is there an easier way to re-associate a project and references to that missing project without having to take 10 minutes every time to re-associate it all over the place if simply the path has changed?

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  • How would I include open source library in my iPhone application?

    - by greypoint
    I have found an existing open source library that I would like to include in my iPhone project (the unrar source code found here: http://www.rarlab.com/rar_add.htm ). I have compiled this source as a linked library on my Mac with "make lib" which creates the libunrar.so file just fine. These are the makefile settings for that target: lib: WHAT=RARDLL lib: $(OBJECTS) $(LIB_OBJ) @rm -f libunrar.so $(LINK) -shared -o libunrar.so $(LDFLAGS) $(OBJECTS) $(LIB_OBJ) Obviously I can't use this on iPhone but I imagine I should be able to compile with different options to make a static library that I can use. Do I: Compile it on the Mac with different make options then drag the resulting library (some kind of .a ?) into my xcode project? or Drag all of the source code into my xcode project and create special targets of some kind to create it? or Something else entirely different? I've been working on solving my unrar problem for a couple of weeks now and I believe using this library will give me the best results but I just don't know the final steps to make use of it. Thanks for all advice.

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  • Employee Info Starter Kit: Project Mission

    - by Mohammad Ashraful Alam
    Employee Info Starter Kit is an open source ASP.NET project template that is intended to address different types of real world challenges faced by web application developers when performing common CRUD operations. Using a single database table ‘Employee’, it illustrates how to utilize Microsoft ASP.NET 4.0, Entity Framework 4.0 and Visual Studio 2010 effectively in that context. Employee Info Starter Kit is highly influenced by the concept ‘Pareto Principle’ or 80-20 rule. where it is targeted to enable a web developer to gain 80% productivity with 20% of effort with respect to learning curve and production. User Stories The user end functionalities of this starter kit are pretty simple and straight forward that are focused in to perform CRUD operation on employee records as described below. Creating a new employee record Read existing employee record Update an existing employee record Delete existing employee records Key Technology Areas ASP.NET 4.0 Entity Framework 4.0 T-4 Template Visual Studio 2010 Architectural Objective There is no universal architecture which can be considered as the best for all sorts of applications around the world. Based on requirements, constraints, environment, application architecture can differ from one to another. Trade-off factors are one of the important considerations while deciding a particular architectural solution. Employee Info Starter Kit is highly influenced by the concept ‘Pareto Principle’ or 80-20 rule, where it is targeted to enable a web developer to gain 80% productivity with 20% of effort with respect to learning curve and production. “Productivity” as the architectural objective typically also includes other trade-off factors as well as, such as testability, flexibility, performance etc. Fortunately Microsoft .NET Framework 4.0 and Visual Studio 2010 includes lots of great features that have been implemented cleverly in this project to reduce these trade-off factors in the minimum level. Why Employee Info Starter Kit is Not a Framework? Application frameworks are really great for productivity, some of which are really unavoidable in this modern age. However relying too many frameworks may overkill a project, as frameworks are typically designed to serve wide range of different usage and are less customizable or editable. On the other hand having implementation patterns can be useful for developers, as it enables them to adjust application on demand. Employee Info Starter Kit provides hundreds of “connected” snippets and implementation patterns to demonstrate problem solutions in actual production environment. It also includes Visual Studio T-4 templates that generate thousands lines of data access and business logic layer repetitive codes in literally few seconds on the fly, which are fully mock testable due to language support for partial methods and latest support for mock testing in Entity Framework. Why Employee Info Starter Kit is Different than Other Open-source Web Applications? Software development is one of the rapid growing industries around the globe, where the technology is being updated very frequently to adapt greater challenges over time. There are literally thousands of community web sites, blogs and forums that are dedicated to provide support to adapt new technologies. While some are really great to enable learning new technologies quickly, in most cases they are either too “simple and brief” to be used in real world scenarios or too “complex and detailed” which are typically focused to achieve a product goal (such as CMS, e-Commerce etc) from "end user" perspective and have a long duration learning curve with respect to the corresponding technology. Employee Info Starter Kit, as a web project, is basically "developer" oriented which actually considers a hybrid approach as “simple and detailed”, where a simple domain has been considered to intentionally illustrate most of the architectural and implementation challenges faced by web application developers so that anyone can dive into deep into the corresponding new technology or concept quickly. Roadmap Since its first release by 2008 in MSDN Code Gallery, Employee Info Starter Kit gained a huge popularity in ASP.NET community and had 1, 50,000+ downloads afterwards. Being encouraged with this great response, we have a strong commitment for the community to provide support for it with respect to latest technologies continuously. Currently hosted in Codeplex, this community driven project is planned to have a wide range of individual editions, each of which will be focused on a selected application architecture, framework or platform, such as ASP.NET Webform, ASP.NET Dynamic Data, ASP.NET MVC, jQuery Ajax (RIA), Silverlight (RIA), Azure Service Platform (Cloud), Visual Studio Automated Test etc. See here for full list of current and future editions.

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  • Why does Mac OS X Software Update not work when machine uses Active Directory?

    - by Lyndsey Ferguson
    My company's IT department is mostly a Windows run operation and in order to become more secure, they are altering the way that the Macintosh computers login to our internal network so that they use Active Directory like their Windows counterparts. I have been given Administrative permission on my Mac and I am able to do most of what I used to be able to do in terms of authentication of software installations. However, there is a problem: the "Software Update" feature doesn't work. What happens is that when I try to get the Mac to perform its Software Updates from the Apple menu, the normal window appears listing what has to be updated; I am able to select what to update and click the "Update" button, but then nothing happens. It doesn't ask for authentication like it used to, the computer doesn't perform any download or installation (it does sometimes ask me to agree to license agreements for iTunes). I can download the updates individually and install them without any issues, but the auto-update fails. I'd rather use the Software Update menu item like I used to: it is much more convenient. Any suggestions on how I can fix this? EDIT Nov 19th, 2009, 10:09 EST: I have posted this question to the Apple Mac OS X Snow Leopard support forum. EDIT Nov 19th, 2009, 12:39 EST:Yes, the Terminal command "sudo softwareupdate --install --all" does work flawlessly. I want to avoid that as my co-workers are generally not comfortable on the Mac. I also tried Chealion's suggestion to delete "~/Library/Preferences/com.apple.SoftwareUpdate.plist" and "/Library/Preferences/com.apple.SoftwareUpdate.plist", Software Update still fails. However, I did get diagnostic messages in the Console (below). I've deleted the MS Office Package Receipts and examined the suhelperd (Software Update Helper Daemon?); it appears that suhelperd is crashing and that explains why it doesn't work. I've submitted a bug report to Apple (radar://7408619). Here are the Console diagnostic messages: 11/19/09 12:36:44 PM com.apple.suhelperd[66829] terminate called after throwing an instance of 'NSException' 11/19/09 12:36:47 PM com.apple.launchd[1] (com.apple.suhelperd[66829]) Job appears to have crashed: Abort trap 11/19/09 12:36:48 PM com.apple.ReportCrash.Root[66830] 2009-11-19 12:36:48.275 ReportCrash[66830:2703] Saved crash report for suhelperd[66829] version ??? (???) to /Library/Logs/DiagnosticReports/suhelperd_2009-11-19-123648_localhost.crash 11/19/09 12:36:54 PM com.apple.launchd[1] (com.apple.suhelperd) Throttling respawn: Will start in 1 seconds 11/19/09 12:36:55 PM com.apple.suhelperd[66836] terminate called after throwing an instance of 'NSException' 11/19/09 12:36:55 PM com.apple.launchd[1] (com.apple.suhelperd[66836]) Job appears to have crashed: Abort trap 11/19/09 12:36:56 PM com.apple.ReportCrash.Root[66830] 2009-11-19 12:36:56.017 ReportCrash[66830:2f03] Saved crash report for suhelperd[66836] version ??? (???) to /Library/Logs/DiagnosticReports/suhelperd_2009-11-19-123655_localhost.crash 11/19/09 12:36:58 PM Software Update[66826] PackageKit: *** Missing bundle identifier: /Library/Receipts/Office2008_en_automator.pkg 11/19/09 12:36:58 PM Software Update[66826] PackageKit: *** Missing bundle identifier: /Library/Receipts/Office2008_en_automator_workflow.pkg 11/19/09 12:36:58 PM Software Update[66826] PackageKit: *** Missing bundle identifier: /Library/Receipts/Office2008_en_autoupdate.pkg 11/19/09 12:36:58 PM Software Update[66826] PackageKit: *** Missing bundle identifier: /Library/Receipts/Office2008_en_clipart.pkg 11/19/09 12:36:58 PM Software Update[66826] PackageKit: *** Missing bundle identifier: /Library/Receipts/Office2008_en_core.pkg 11/19/09 12:36:58 PM Software Update[66826] PackageKit: *** Missing bundle identifier: /Library/Receipts/Office2008_en_dock.pkg 11/19/09 12:36:58 PM Software Update[66826] PackageKit: *** Missing bundle identifier: /Library/Receipts/Office2008_en_entourage.pkg 11/19/09 12:36:58 PM Software Update[66826] PackageKit: *** Missing bundle identifier: /Library/Receipts/Office2008_en_entourage_help_std.pkg 11/19/09 12:36:58 PM Software Update[66826] PackageKit: *** Missing bundle identifier: /Library/Receipts/Office2008_en_equationeditor.pkg 11/19/09 12:36:58 PM Software Update[66826] PackageKit: *** Missing bundle identifier: /Library/Receipts/Office2008_en_errorreporting.pkg 11/19/09 12:36:58 PM Software Update[66826] PackageKit: *** Missing bundle identifier: /Library/Receipts/Office2008_en_excel.pkg 11/19/09 12:36:58 PM Software Update[66826] PackageKit: *** Missing bundle identifier: /Library/Receipts/Office2008_en_excel_help_std.pkg 11/19/09 12:36:58 PM Software Update[66826] PackageKit: *** Missing bundle identifier: /Library/Receipts/Office2008_en_fonts.pkg 11/19/09 12:36:58 PM Software Update[66826] PackageKit: *** Missing bundle identifier: /Library/Receipts/Office2008_en_graph.pkg 11/19/09 12:36:58 PM Software Update[66826] PackageKit: *** Missing bundle identifier: /Library/Receipts/Office2008_en_helpviewer.pkg 11/19/09 12:36:58 PM Software Update[66826] PackageKit: *** Missing bundle identifier: /Library/Receipts/Office2008_en_launch.pkg 11/19/09 12:36:58 PM Software Update[66826] PackageKit: *** Missing bundle identifier: /Library/Receipts/Office2008_en_ooxml.pkg 11/19/09 12:36:58 PM Software Update[66826] PackageKit: *** Missing bundle identifier: /Library/Receipts/Office2008_en_orgchart.pkg 11/19/09 12:36:58 PM Software Update[66826] PackageKit: *** Missing bundle identifier: /Library/Receipts/Office2008_en_powerpoint.pkg 11/19/09 12:36:58 PM Software Update[66826] PackageKit: *** Missing bundle identifier: /Library/Receipts/Office2008_en_powerpoint_help_std.pkg 11/19/09 12:36:58 PM Software Update[66826] PackageKit: *** Missing bundle identifier: /Library/Receipts/Office2008_en_proofing_brazilian.pkg 11/19/09 12:36:58 PM Software Update[66826] PackageKit: *** Missing bundle identifier: /Library/Receipts/Office2008_en_proofing_danish.pkg 11/19/09 12:36:58 PM Software Update[66826] PackageKit: *** Missing bundle identifier: /Library/Receipts/Office2008_en_proofing_dutch.pkg 11/19/09 12:36:58 PM Software Update[66826] PackageKit: *** Missing bundle identifier: /Library/Receipts/Office2008_en_proofing_english.pkg 11/19/09 12:36:58 PM Software Update[66826] PackageKit: *** Missing bundle identifier: /Library/Receipts/Office2008_en_proofing_finnish.pkg 11/19/09 12:36:58 PM Software Update[66826] PackageKit: *** Missing bundle identifier: /Library/Receipts/Office2008_en_proofing_french.pkg 11/19/09 12:36:58 PM Software Update[66826] PackageKit: *** Missing bundle identifier: /Library/Receipts/Office2008_en_proofing_german.pkg 11/19/09 12:36:58 PM Software Update[66826] PackageKit: *** Missing bundle identifier: /Library/Receipts/Office2008_en_proofing_italian.pkg 11/19/09 12:36:58 PM Software Update[66826] PackageKit: *** Missing bundle identifier: /Library/Receipts/Office2008_en_proofing_japanese.pkg 11/19/09 12:36:58 PM Software Update[66826] PackageKit: *** Missing bundle identifier: /Library/Receipts/Office2008_en_proofing_norwegian.pkg 11/19/09 12:36:58 PM Software Update[66826] PackageKit: *** Missing bundle identifier: /Library/Receipts/Office2008_en_proofing_portuguese.pkg 11/19/09 12:36:58 PM Software Update[66826] PackageKit: *** Missing bundle identifier: /Library/Receipts/Office2008_en_proofing_spanish.pkg 11/19/09 12:36:58 PM Software Update[66826] PackageKit: *** Missing bundle identifier: /Library/Receipts/Office2008_en_proofing_swedish.pkg 11/19/09 12:36:58 PM Software Update[66826] PackageKit: *** Missing bundle identifier: /Library/Receipts/Office2008_en_required.pkg 11/19/09 12:36:58 PM Software Update[66826] PackageKit: *** Missing bundle identifier: /Library/Receipts/Office2008_en_silverlight.pkg 11/19/09 12:36:58 PM Software Update[66826] PackageKit: *** Missing bundle identifier: /Library/Receipts/Office2008_en_sounds.pkg 11/19/09 12:36:58 PM Software Update[66826] PackageKit: *** Missing bundle identifier: /Library/Receipts/Office2008_en_word.pkg 11/19/09 12:36:58 PM Software Update[66826] PackageKit: *** Missing bundle identifier: /Library/Receipts/Office2008_en_word_help_std.pkg 11/19/09 12:37:26 PM com.apple.suhelperd[66839] terminate called after throwing an instance of 'NSException' 11/19/09 12:37:26 PM com.apple.launchd[1] (com.apple.suhelperd[66839]) Job appears to have crashed: Abort trap 11/19/09 12:37:26 PM com.apple.ReportCrash.Root[66830] 2009-11-19 12:37:26.929 ReportCrash[66830:2b07] Saved crash report for suhelperd[66839] version ??? (???) to /Library/Logs/DiagnosticReports/suhelperd_2009-11-19-123726_localhost.crash And here is the suhelperd crash report: Process: suhelperd [66839] Path: /System/Library/PrivateFrameworks/SoftwareUpdate.framework/Versions/A/Resources/suhelperd Identifier: suhelperd Version: ??? (???) Code Type: X86-64 (Native) Parent Process: launchd [1] Date/Time: 2009-11-19 12:37:26.473 -0500 OS Version: Mac OS X 10.6.2 (10C540) Report Version: 6 Exception Type: EXC_CRASH (SIGABRT) Exception Codes: 0x0000000000000000, 0x0000000000000000 Crashed Thread: 0 Dispatch queue: com.apple.main-thread Application Specific Information: abort() called *** Terminating app due to uncaught exception 'NSRangeException', reason: '*** -[NSCFArray objectAtIndex:]: index (0) beyond bounds (0)' *** Call stack at first throw: ( 0 CoreFoundation 0x00007fff859a9444 __exceptionPreprocess + 180 1 libobjc.A.dylib 0x00007fff8787e0f3 objc_exception_throw + 45 2 CoreFoundation 0x00007fff859a9267 +[NSException raise:format:arguments:] + 103 3 CoreFoundation 0x00007fff859a91f4 +[NSException raise:format:] + 148 4 Foundation 0x00007fff855da080 _NSArrayRaiseBoundException + 122 5 Foundation 0x00007fff8553cb81 -[NSCFArray objectAtIndex:] + 75 6 Admin 0x00007fff8107920e +[User(UserPrivate) _userWithInfo:attributes:] + 71 7 Admin 0x00007fff81080d6b +[User findUserByID:searchParent:] + 404 8 suhelperd 0x0000000100001274 0x0 + 4294972020 9 suhelperd 0x0000000100002240 0x0 + 4294976064 10 suhelperd 0x00000001000053b1 0x0 + 4294988721 11 suhelperd 0x00000001000044b3 0x0 + 4294984883 12 suhelperd 0x0000000100004154 0x0 + 4294984020 13 libSystem.B.dylib 0x00007fff83eb60d8 mach_msg_server + 357 14 suhelperd 0x00000001000036eb 0x0 + 4294981355 15 suhelperd 0x0000000100002a1f 0x0 + 4294978079 16 suhelperd 0x0000000100001080 0x0 + 4294971520 ) Thread 0 Crashed: Dispatch queue: com.apple.main-thread 0 libSystem.B.dylib 0x00007fff83e86fe6 __kill + 10 1 libSystem.B.dylib 0x00007fff83f27e32 abort + 83 2 libstdc++.6.dylib 0x00007fff873cf5d2 __tcf_0 + 0 3 libobjc.A.dylib 0x00007fff87881d29 _objc_terminate + 100 4 libstdc++.6.dylib 0x00007fff873cdae1 __cxxabiv1::__terminate(void (*)()) + 11 5 libstdc++.6.dylib 0x00007fff873cdb16 __cxxabiv1::__unexpected(void (*)()) + 0 6 libstdc++.6.dylib 0x00007fff873cdbfc __gxx_exception_cleanup(_Unwind_Reason_Code, _Unwind_Exception*) + 0 7 libobjc.A.dylib 0x00007fff8787e192 object_getIvar + 0 8 com.apple.CoreFoundation 0x00007fff859a9267 +[NSException raise:format:arguments:] + 103 9 com.apple.CoreFoundation 0x00007fff859a91f4 +[NSException raise:format:] + 148 10 com.apple.Foundation 0x00007fff855da080 _NSArrayRaiseBoundException + 122 11 com.apple.Foundation 0x00007fff8553cb81 -[NSCFArray objectAtIndex:] + 75 12 com.apple.framework.Admin 0x00007fff8107920e +[User(UserPrivate) _userWithInfo:attributes:] + 71 13 com.apple.framework.Admin 0x00007fff81080d6b +[User findUserByID:searchParent:] + 404 14 suhelperd 0x0000000100001274 0x100000000 + 4724 15 suhelperd 0x0000000100002240 0x100000000 + 8768 16 suhelperd 0x00000001000053b1 0x100000000 + 21425 17 suhelperd 0x00000001000044b3 0x100000000 + 17587 18 suhelperd 0x0000000100004154 0x100000000 + 16724 19 libSystem.B.dylib 0x00007fff83eb60d8 mach_msg_server + 357 20 suhelperd 0x00000001000036eb 0x100000000 + 14059 21 suhelperd 0x0000000100002a1f 0x100000000 + 10783 22 suhelperd 0x0000000100001080 0x100000000 + 4224 Thread 1: Dispatch queue: com.apple.libdispatch-manager 0 libSystem.B.dylib 0x00007fff83e51bba kevent + 10 1 libSystem.B.dylib 0x00007fff83e53a85 _dispatch_mgr_invoke + 154 2 libSystem.B.dylib 0x00007fff83e5375c _dispatch_queue_invoke + 185 3 libSystem.B.dylib 0x00007fff83e53286 _dispatch_worker_thread2 + 244 4 libSystem.B.dylib 0x00007fff83e52bb8 _pthread_wqthread + 353 5 libSystem.B.dylib 0x00007fff83e52a55 start_wqthread + 13 Thread 2: 0 libSystem.B.dylib 0x00007fff83e529da __workq_kernreturn + 10 1 libSystem.B.dylib 0x00007fff83e52dec _pthread_wqthread + 917 2 libSystem.B.dylib 0x00007fff83e52a55 start_wqthread + 13 Thread 0 crashed with X86 Thread State (64-bit): rax: 0x0000000000000000 rbx: 0x00007fff707d7298 rcx: 0x00007fff5fbff868 rdx: 0x0000000000000000 rdi: 0x0000000000010517 rsi: 0x0000000000000006 rbp: 0x00007fff5fbff880 rsp: 0x00007fff5fbff868 r8: 0x00007fff707da9e0 r9: 0x0000000000000063 r10: 0x00007fff83e83026 r11: 0x0000000000000202 r12: 0x00007fff85a2dca1 r13: 0x0000000000000000 r14: 0x00007fff70bea228 r15: 0x00007fff5fbffb10 rip: 0x00007fff83e86fe6 rfl: 0x0000000000000202 cr2: 0x00007fff70e3afd0

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  • How to Avoid Your Next 12-Month Science Project

    - by constant
    While most customers immediately understand how the magic of Oracle's Hybrid Columnar Compression, intelligent storage servers and flash memory make Exadata uniquely powerful against home-grown database systems, some people think that Exalogic is nothing more than a bunch of x86 servers, a storage appliance and an InfiniBand (IB) network, built into a single rack. After all, isn't this exactly what the High Performance Computing (HPC) world has been doing for decades? On the surface, this may be true. And some people tried exactly that: They tried to put together their own version of Exalogic, but then they discover there's a lot more to building a system than buying hardware and assembling it together. IT is not Ikea. Why is that so? Could it be there's more going on behind the scenes than merely putting together a bunch of servers, a storage array and an InfiniBand network into a rack? Let's explore some of the special sauce that makes Exalogic unique and un-copyable, so you can save yourself from your next 6- to 12-month science project that distracts you from doing real work that adds value to your company. Engineering Systems is Hard Work! The backbone of Exalogic is its InfiniBand network: 4 times better bandwidth than even 10 Gigabit Ethernet, and only about a tenth of its latency. What a potential for increased scalability and throughput across the middleware and database layers! But InfiniBand is a beast that needs to be tamed: It is true that Exalogic uses a standard, open-source Open Fabrics Enterprise Distribution (OFED) InfiniBand driver stack. Unfortunately, this software has been developed by the HPC community with fastest speed in mind (which is good) but, despite the name, not many other enterprise-class requirements are included (which is less good). Here are some of the improvements that Oracle's InfiniBand development team had to add to the OFED stack to make it enterprise-ready, simply because typical HPC users didn't have the need to implement them: More than 100 bug fixes in the pieces that were not related to the Message Passing Interface Protocol (MPI), which is the protocol that HPC users use most of the time, but which is less useful in the enterprise. Performance optimizations and tuning across the whole IB stack: From Switches, Host Channel Adapters (HCAs) and drivers to low-level protocols, middleware and applications. Yes, even the standard HPC IB stack could be improved in terms of performance. Ethernet over IB (EoIB): Exalogic uses InfiniBand internally to reach high performance, but it needs to play nicely with datacenters around it. That's why Oracle added Ethernet over InfiniBand technology to it that allows for creating many virtual 10GBE adapters inside Exalogic's nodes that are aggregated and connected to Exalogic's IB gateway switches. While this is an open standard, it's up to the vendor to implement it. In this case, Oracle integrated the EoIB stack with Oracle's own IB to 10GBE gateway switches, and made it fully virtualized from the beginning. This means that Exalogic customers can completely rewire their server infrastructure inside the rack without having to physically pull or plug a single cable - a must-have for every cloud deployment. Anybody who wants to match this level of integration would need to add an InfiniBand switch development team to their project. Or just buy Oracle's gateway switches, which are conveniently shipped with a whole server infrastructure attached! IPv6 support for InfiniBand's Sockets Direct Protocol (SDP), Reliable Datagram Sockets (RDS), TCP/IP over IB (IPoIB) and EoIB protocols. Because no IPv6 = not very enterprise-class. HA capability for SDP. High Availability is not a big requirement for HPC, but for enterprise-class application servers it is. Every node in Exalogic's InfiniBand network is connected twice for redundancy. If any cable or port or HCA fails, there's always a replacement link ready to take over. This requires extra magic at the protocol level to work. So in addition to Weblogic's failover capabilities, Oracle implemented IB automatic path migration at the SDP level to avoid unnecessary failover operations at the middleware level. Security, for example spoof-protection. Another feature that is less important for traditional users of InfiniBand, but very important for enterprise customers. InfiniBand Partitioning and Quality-of-Service (QoS): One of the first questions we get from customers about Exalogic is: “How can we implement multi-tenancy?” The answer is to partition your IB network, which effectively creates many networks that work independently and that are protected at the lowest networking layer possible. In addition to that, QoS allows administrators to prioritize traffic flow in multi-tenancy environments so they can keep their service levels where it matters most. Resilient IB Fabric Management: InfiniBand is a self-managing network, so a lot of the magic lies in coming up with the right topology and in teaching the subnet manager how to properly discover and manage the network. Oracle's Infiniband switches come with pre-integrated, highly available fabric management with seamless integration into Oracle Enterprise Manager Ops Center. In short: Oracle elevated the OFED InfiniBand stack into an enterprise-class networking infrastructure. Many years and multiple teams of manpower went into the above improvements - this is something you can only get from Oracle, because no other InfiniBand vendor can give you these features across the whole stack! Exabus: Because it's not About the Size of Your Network, it's How You Use it! So let's assume that you somehow were able to get your hands on an enterprise-class IB driver stack. Or maybe you don't care and are just happy with the standard OFED one? Anyway, the next step is to actually leverage that InfiniBand performance. Here are the choices: Use traditional TCP/IP on top of the InfiniBand stack, Develop your own integration between your middleware and the lower-level (but faster) InfiniBand protocols. While more bandwidth is always a good thing, it's actually the low latency that enables superior performance for your applications when running on any networking infrastructure: The lower the latency, the faster the response travels through the network and the more transactions you can close per second. The reason why InfiniBand is such a low latency technology is that it gets rid of most if not all of your traditional networking protocol stack: Data is literally beamed from one region of RAM in one server into another region of RAM in another server with no kernel/drivers/UDP/TCP or other networking stack overhead involved! Which makes option 1 a no-go: Adding TCP/IP on top of InfiniBand is like adding training wheels to your racing bike. It may be ok in the beginning and for development, but it's not quite the performance IB was meant to deliver. Which only leaves option 2: Integrating your middleware with fast, low-level InfiniBand protocols. And this is what Exalogic's "Exabus" technology is all about. Here are a few Exabus features that help applications leverage the performance of InfiniBand in Exalogic: RDMA and SDP integration at the JDBC driver level (SDP), for Oracle Weblogic (SDP), Oracle Coherence (RDMA), Oracle Tuxedo (RDMA) and the new Oracle Traffic Director (RDMA) on Exalogic. Using these protocols, middleware can communicate a lot faster with each other and the Oracle database than by using standard networking protocols, Seamless Integration of Ethernet over InfiniBand from Exalogic's Gateway switches into the OS, Oracle Weblogic optimizations for handling massive amounts of parallel transactions. Because if you have an 8-lane Autobahn, you also need to improve your ramps so you can feed it with many cars in parallel. Integration of Weblogic with Oracle Exadata for faster performance, optimized session management and failover. As you see, “Exabus” is Oracle's word for describing all the InfiniBand enhancements Oracle put into Exalogic: OFED stack enhancements, protocols for faster IB access, and InfiniBand support and optimizations at the virtualization and middleware level. All working together to deliver the full potential of InfiniBand performance. Who else has 100% control over their middleware so they can develop their own low-level protocol integration with InfiniBand? Even if you take an open source approach, you're looking at years of development work to create, test and support a whole new networking technology in your middleware! The Extras: Less Hassle, More Productivity, Faster Time to Market And then there are the other advantages of Engineered Systems that are true for Exalogic the same as they are for every other Engineered System: One simple purchasing process: No headaches due to endless RFPs and no “Will X work with Y?” uncertainties. Everything has been engineered together: All kinds of bugs and problems have been already fixed at the design level that would have only manifested themselves after you have built the system from scratch. Everything is built, tested and integrated at the factory level . Less integration pain for you, faster time to market. Every Exalogic machine world-wide is identical to Oracle's own machines in the lab: Instant replication of any problems you may encounter, faster time to resolution. Simplified patching, management and operations. One throat to choke: Imagine finger-pointing hell for systems that have been put together using several different vendors. Oracle's Engineered Systems have a single phone number that customers can call to get their problems solved. For more business-centric values, read The Business Value of Engineered Systems. Conclusion: Buy Exalogic, or get ready for a 6-12 Month Science Project And here's the reason why it's not easy to "build your own Exalogic": There's a lot of work required to make such a system fly. In fact, anybody who is starting to "just put together a bunch of servers and an InfiniBand network" is really looking at a 6-12 month science project. And the outcome is likely to not be very enterprise-class. And it won't have Exalogic's performance either. Because building an Engineered System is literally rocket science: It takes a lot of time, effort, resources and many iterations of design/test/analyze/fix to build such a system. That's why InfiniBand has been reserved for HPC scientists for such a long time. And only Oracle can bring the power of InfiniBand in an enterprise-class, ready-to use, pre-integrated version to customers, without the develop/integrate/support pain. For more details, check the new Exalogic overview white paper which was updated only recently. P.S.: Thanks to my colleagues Ola, Paul, Don and Andy for helping me put together this article! var flattr_uid = '26528'; var flattr_tle = 'How to Avoid Your Next 12-Month Science Project'; var flattr_dsc = 'While most customers immediately understand how the magic of Oracle's Hybrid Columnar Compression, intelligent storage servers and flash memory make Exadata uniquely powerful against home-grown database systems, some people think that Exalogic is nothing more than a bunch of x86 servers, a storage appliance and an InfiniBand (IB) network, built into a single rack.After all, isn't this exactly what the High Performance Computing (HPC) world has been doing for decades?On the surface, this may be true. And some people tried exactly that: They tried to put together their own version of Exalogic, but then they discover there's a lot more to building a system than buying hardware and assembling it together. IT is not Ikea.Why is that so? Could it be there's more going on behind the scenes than merely putting together a bunch of servers, a storage array and an InfiniBand network into a rack? Let's explore some of the special sauce that makes Exalogic unique and un-copyable, so you can save yourself from your next 6- to 12-month science project that distracts you from doing real work that adds value to your company.'; var flattr_tag = 'Engineered Systems,Engineered Systems,Infiniband,Integration,latency,Oracle,performance'; var flattr_cat = 'text'; var flattr_url = 'http://constantin.glez.de/blog/2012/04/how-avoid-your-next-12-month-science-project'; var flattr_lng = 'en_GB'

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