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  • MongoDB vs. Redis vs. Cassandra for a fast-write, temporary row storage solution

    - by Mark Bao
    Hi there, I'm building a system that tracks and verifies ad impressions and clicks. This means that there are a lot of insert commands (about 90/second average, peaking at 250) and some read operations, but the focus is on performance and making it blazing-fast. The system is currently on MongoDB, but I've been introduced to Cassandra and Redis since then. Would it be a good idea to go to one of these two solutions, rather than stay on MongoDB? Why or why not? Thank you

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  • What groupware/collaboration system to choose?

    - by Ivan
    I am looking for a good (stable enough, intuitive enough, and the more technologically modern and advanced - the better) free PHP-based online groupware/collaboration system. 100% UTF-8 is a requirement. OOP-style code is an advantage. And collaborative mindmapping would be a cool feature to have. The team is of ~20 people. Any suggestions?

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  • Which version of MSXML should I use?

    - by Cheeso
    Seems like this would be a common question, though I could not find it on SO. Which version of MSXML should I use in my applications, and more importantly, how should I decide? There is MSXML3, 4, 5 and 6. I recently posted some code in calling-wcf-service-by-vbscript that used MSXML v4. AnthonyWJones posted that I shouldn't use 4, but instead 3 or 6, but probably 3. Certainly not v5! Why? I'd like to know more about the criteria for selecting the version of MSXML to use in my apps. Bonus question: Does anyone have a summary of the differences between the various versions of MSXML over time? Summary so far: MSXML6 Should be first choice. was released in 2006, and includes perf and compliance fixes. Use this if you can. It's good. There are no merge modules; to bundle the MSXML6 runtime with your app, MS suggests packaging the MSXML6 msi file. MSXML6 is an upgrade from MSXML3/4 but does not replace them, because it discontinues some features. You can get the MSI here. MSXML3 Second choice. Most widely deployed version. Originally shipped in March 2000. Actively maintained, no new features. Currently supported, if you are on SP5 (shipped in 2005) or later. SP7 is current (also from 2005). MSXML5 was released only as part of MS-Office. Currently supported by Microsoft, but only as part of Office, not for building apps. Don't build apps that depend on MSXML5: Verboten. MSXML4 originally shipped? Currently in "maintenance mode". Microsoft is encouraging people to move off MSXML4 to MSXML6. Currently supported if you are on MSXML4SP2 or later, which shipped in 2003. download MSXML4SP2 here. Can be redisributed. Using the right version of MSXML in Internet Explorer is a good entry on the blog from Microsoft's xmlteam.

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  • LINQ2SQL and MS SQL 2000

    - by artvolk
    Good day! I have used LINQ2SQL with MS SQL 2005, but now I need to use it with MS SQL 2000. I have found only article on MSDN that tells about Skip() and Take() oddities on MS SQL 2000 (that's because it lacks ROW_NUMBER(), I suppose) and nothing more. Anyway, does anybody have expirience with LINQ2SQL and MS SQL 2000 combination. P.S. Just wondering: is it possible to model LINQ2SQL class on view, not a real table?

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  • Best IDE for Palm OS devices

    - by Jawad
    Does anyone have experience with using a good quality IDE for Palm OS? In particular I'm looking for the ability to compile small non-colour .prc files for roll out to older Palm III models (8MB).

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  • Getting error: CS1061

    - by coure06
    Refer to http://stackoverflow.com/questions/369794/good-and-full-implementation-of-rss-feeds-in-asp-net-mvc Check the answer of Trevor de Koekkoek. I am getting this error CS1061: 'object' does not contain a definition for 'Items' and no extension method 'Items' accepting a first argument of type 'object' could be found (are you missing a using directive or an assembly reference?)

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  • UIGraphicsGetCurrentContext threading problem

    - by Infinity
    Hello guys! The reference says this: "You should call this function from the main thread of your application only." But I would like to get the current graphics context from separate threads. What do you think? What can I do to reach this? Edit: Thanks guys for the answers. I don't know which is good for me at the moment, but thank you very much.

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  • How does SimpleWorkerRequest associate MIME types with extensions?

    - by Justin Dearing
    I was serving html referencing svg files in Cassini, and having problems since the mime type was not being sent properly. I ended up writing my own port of Cassini that set the extension based on mime type. After a good night of sleep I realized that there might be some sort of registry key or config file where I can configure custom mime types for SimpleWorkerRequest, the .NET class that serves content through Casinni. However, I don't know what that is.

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  • ASP.NET MVC Routing Via Method Attributes

    - by TorgoGuy
    In the StackOverflow Podcast #54, Jeff mentions they register their URL routes in the StackOverflow codebase via an attribute above the method that handles the route. Sounds like a good concept (with the caveat that Phil Haack brought up regarding route priorities). Could someone provide some sample to to make this happen? Also, any "best practices" for using this style of routing?

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  • Vaadin and Spring MVC Integration

    - by dakull
    I'm thinking about the possibility of using Spring MVC with Vaadin Framework. Are there any documented ways of making them play nicely together ? Also is it a good idea to use them together ? relating to performance; I'm going to run the app on a dedicated server. To make my question a bit more clear, how can i return a modelandview from a Spring MVC Controller that wll render using Vaadin and can access all the model data.

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  • Using NServiceBus with multiple application both act as Publisher and Subscriber

    - by Yoann. B
    Hi, I'm trying to use NServiceBus to make 4 applications communicating together. All these applications have to act as Publisher and Subscriber. The only way i founded ti get it workiing is to create a "master" queue named Server, on which MessageEndpointMappings in all applications configuration is mapped to, but i think it's not the good way ... So how should i configure NServiceBus on all these application to get this working ? Thanks.

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  • Docking controls in C#

    - by karthik
    hi all I have 10controls inside my form i want to dock them efficiently inside my form. i need a free library for doing this(except Dotnetmagic).can anyone suggest me a good library. Regards, karthikeyan saravanan

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  • Anonymous methods/functions: a fundamental feature or a violation of OO principles?

    - by RD1
    Is the recent movement towards anonymous methods/functions by mainstream languages like perl and C# something important, or a weird feature that violates OO principles? Are recent libraries like the most recent version of Intel's Thread Building Blocks and Microsofts PPL and Linq that depend on such things a good thing, or not? Are languages that currently reject anonymous methods/functions, like Java, making wise choices in sticking with a purely OO model, or are they falling behind by lacking a fundamental programming feature?

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  • PHP Browser Detection and Redirection

    - by Vincent
    All, My application supports IE7+, MOZILLA and other modern browsers. Anybody know of a very good browser detection and redirection PHP class? I came across this, but I am not sure if anybody used this: http://chrisschuld.com/projects/browser-php-detecting-a-users-browser-from-php/#typicalusage Thanks

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  • Importance of Software Engineering

    - by jammkie same
    I am a student , pursuing engineering in Computer science but i don not find software engineering intresting.How much important software engineering is for software professional. Can i be a good software professional with little knowledge in software engineering?

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  • Which OAuth library do you find works best for Objective-C/iPhone?

    - by Brennan
    I have been looking to switch to OAuth for my Twitter integration code and now that there is a deadline in less than 7 weeks (see countdown link) it is even more important to make the jump to OAuth. I have been doing Basic Authentication which is extremely easy. Unfortunately OAuth does not appear to be something that I would whip together in a couple of hours. http://www.countdowntooauth.com/ So I am looking to use a library. I have put together the following list. MPOAuth MGTwitterEngine OAuthConsumer I see that MPOAuth has some great features with a good deal of testing code in place but there is one big problem. It does not work. The sample iPhone project that is supposed to authenticate with Twitter causes an error which others have identified and logged as a bug. http://code.google.com/p/mpoauthconnection/issues/detail?id=29 The last code change was March 11 and this bug was filed on March 30. It has been over a month and this critical bug has not been fixed yet. So I have moved on to MGTwitterEngine. I pulled down the source code and loaded it up in Xcode. Immediately I find that there are a few dependencies and the README file does not have a clear list of steps to fetch those dependencies and integrate them with the project so that it builds successfully. I see this as a sign that the project is not mature enough for prime time. I see also that the project references 2 libraries for JSON when one should be enough. One is TouchJSON which has worked well for me so I am again discouraged from relying on this project for my applications. I did find that MGTwitterEngine makes use of OAuthConsumer which is one of many OAuth projects hosted by an OAuth project on Google Code. http://code.google.com/p/oauth/ http://code.google.com/p/oauthconsumer/wiki/UsingOAuthConsumer It looks like OAuthConsumer is a good choice at first glance. It is hosted with other OAuth libraries and has some nice documentation with it. I pulled down the code and it builds without errors but it does have many warnings. And when I run the new Build and Analyze feature in Xcode 3.2 I see 50 analyzer results. Many are marked as potential memory leaks which would likely lead to instability in any app which uses this library. It seems there is no clear winner and I have to go with something before the big Twitter OAuth deadline. Any suggestions?

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  • Does constantly checking the documentation make you a bad coder?

    - by cdburgess
    When writing PHP code for any given project, do you find you can write code off the top of your head? Or do you make multiple round trips to php.net? If it is the later, can you still be considered a good coder. This is a legitimate question as I find I have difficulty always remembering all of the functions that are available to me so I find I use php.net as a crutch. Is there anyway to improve this?

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  • Mochiweb's Scalability Features

    - by ErJab
    From all the articles I've read so far about Mochiweb, I've heard this over and over again that Mochiweb provides very good scalability. My question is, how exactly does Mochiweb get its scalability property? Is it from Erlang's inherent scalability properties or does Mochiweb have any additional code that explicitly enables it to scale well? Put another way, if I were to write a simple HTTP server in Erlang myself, with a simple 'loop' (recursive function) to handle requests, would it have the same level scalability as a simple web server built using the Mochiweb framework?

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