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  • When did you know it was time to leave your job?

    - by Jeremy Michael Cantrell
    Every job has its ups and downs, but sometimes it just isn't worth it to stick around. I'm currently in one of the "down" points with my current job and debating whether or not to start testing the waters for something else. What are your experiences? How did you know it was time to leave? Do you ultimately feel like it was the right decision?

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  • Data aggregation mongodb vs mysql

    - by Dimitris Stefanidis
    I am currently researching on a backend to use for a project with demanding data aggregation requirements. The main project requirements are the following. Store millions of records for each user. Users might have more than 1 million entries per year so even with 100 users we are talking about 100 million entries per year. Data aggregation on those entries must be performed on the fly. The users need to be able to filter on the entries by a ton of available filters and then present summaries (totals , averages e.t.c) and graphs on the results. Obviously I cannot precalculate any of the aggregation results because the filter combinations (and thus the result sets) are huge. Users are going to have access on their own data only but it would be nice if anonymous stats could be calculated for all the data. The data is going to be most of the time in batch. e.g the user will upload the data every day and it could like 3000 records. In some later version there could be automated programs that upload every few minutes in smaller batches of 100 items for example. I made a simple test of creating a table with 1 million rows and performing a simple sum of 1 column both in mongodb and in mysql and the performance difference was huge. I do not remember the exact numbers but it was something like mysql = 200ms , mongodb = 20 sec. I have also made the test with couchdb and had much worse results. What seems promising speed wise is cassandra which I was very enthusiastic about when I first discovered it. However the documentation is scarce and I haven't found any solid examples on how to perform sums and other aggregate functions on the data. Is that possible ? As it seems from my test (Maybe I have done something wrong) with the current performance its impossible to use mongodb for such a project although the automated sharding functionality seems like a perfect fit for it. Does anybody have experience with data aggregation in mongodb or have any insights that might be of help for the implementation of the project ? Thanks, Dimitris

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  • What's the primary use of Windows Event Viewer?

    - by james.ingham
    Hi all, Just wondering what everybody's opinion is on the Windows Admin tool Event Viewer? I'm writing a WCF application at the moment and have started logging errors to the windows event viewer when I handle them. I then started thinking, should I be logging more than just errors, such as when a user has logged in or out or would you go further logging even more activity? Or is this a tool that's mainly used for testing without using the debugger? Any input appreciated:-)

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  • Are Drupal theme settings cached?

    - by barraponto
    i want to change theme_username, a core theme function that outputs that dreadful "not verified" string on users who are not logged in (when they comment, for example). i want a checkbox in admin/build/themes/settings/MYTHEME to change that. but since that theme function gets called a lot, will it hurt the performance of any site using my theme or are theme settings cached?

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  • Displaying html in a table view cell

    - by Surya
    I am working a rss reader app for iphone . What are my options for displaying entry summary in rss feed ( which could be html) in a tableviewcell without compromising scroll performance . I dont control the feed so html in summary section is out of my control . I am thinking of uiwebview would be my last option ( so rss feeds have images and stuff in there, unfortunately ) . I was thinking if there was a way to extract summary text from html.

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  • Track results of a regular expression extractor in JMeter

    - by Glenn Slaven
    Our server returns a custom 'X-Execution-Time' HTTP response header that returns in miliseconds the time between the server getting a request and our code returning a page, ie how long our code takes to run. I'm using JMeter to do some testing & I'd like to be able to report on this number of over time. I've setup this regular expression extractor: X-Execution-Time:\s(\d+) but I don't know how to get JMeter to report on this number per request so i can get a trend over time

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  • Setting up web page width

    - by RPK
    I am new to web-design. I want to set the page-width so that it appears well in a 800x600 resolution screen. I normally use Tables but I read somewhere that excessive use of Tables slows the performance of the website. What other thing I can use and how to set the width?

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  • Add a build number to TFS 2010

    - by Vaccano
    I have a lot of legacy Delphi 5 & 6 Code. We want to test this code using the new Microsoft Test Manager (part of VS2010) To effectively track your testing using this tool you need to use build numbers. To get Delphi 5 or 6 building in TFS Build 2010 is a huge task. One that I am not sure I want to take on. Is there a way I can just insert my build numbers in to tfs?

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  • Multidimensional Array with different types in java

    - by Christian
    I want to store a data structure thats a table with one column Strings and another column of Ints. List<Entry<String, Integer>> li = new LinkedList<Entry<String, Integer>>(); would do the job for a list but I would rather have the performance of an array. I tried Entry<String, Integer>[] = new Entry<String, Integer>[10]; but that doesn't seem to work.

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  • Asp.net web site and web service hosting

    - by Razvi
    I have a web site and a web service and I would like to host them somewhere. I need to use it mostly for testing and so that a some friends who are developing some applications to use the service have access to it. Also the service is using a MS SQL 2008 database. Could you suggest any good free or cheap web hosting service for this. I would need about 1-2 months of hosting.

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  • KPI definition asking for advice

    - by George2
    Hello everyone, I am looking for some reference/samples about how to define good KPI for education industry. I want to define KPI from school/department management perspective to measure various school performance, students/faculty/others. Any advice, referneces or documents are appreciated -- more appreciated if with the context of SQL Server 2005/2008. thanks in advance, George

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  • Complementary language to learn after Python?

    - by BobDobbs
    As a reasonable proficient Python programmer, I'm wondering what a good second language to learn would be. More specifically, something that does well the things that Python doesn't in general do as well. My first guess would be C/C++ since it's got easy extensibility with Python and because it offers generally better performance, but I'm wondering if Java or C# might be a better or at least equivalently good option with different up/downsides compared to C/C++.

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  • Why use NoSQL over Materialized Views?

    - by JustinT
    There has been a lot of talk recently about NoSQL. The #1 reason why I hear people use NoSQL is because they start to de-normalize their DBMS data so much so, to increase performance, that they end up with just one table with all of their data within that single table. With Materialized Views however, you can keep your data normalized, yet have it stored as a single table view for the same reasons why you'd use NoSQL. As such, why would someone use NoSQL over Materialized Views?

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  • Cloud computing?

    - by Shawn H
    I'm an analyst and intermediate programmer working for a consulting company. Sometimes we are doing some intensive computing in Excel which can be frustrating because we have slow computers. My company does not have enough money to buy everyone new computers right now. Is there a cloud computing service that allows me to login to a high performance virtual computer from remote desktop? We are not that technical so preferrably the computer is running Windows and I can run Excel and other applications from this computer. Thanks

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  • Socket throughput on localhost?

    - by gct
    I've got an app that's using sockets to push data, and I'm currently testing it on my localhost (so that the sender and receiver are on the same computer). I'm seeing between 36 and 66MB/s of throughput, which seems somewhat slow to me. What are normal throughput ranges for binary data on a local socket connection?

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  • PHP - CURL vs fopen vs fsocketopen ?

    - by TatMing
    I would write a WordPress plugin to parse all image source and check it's broken link or not. My idea is : Select all post&page's images by regex from MySQL Navigate the image url and get the response header (404 ,403 error etc) print a report Since i don't need actual to download the binary file, so in performance ,compare in CURL , fopen , fsocketopen Which one is worst to use? And one more question, which method can execute in multi-thread?

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  • Managing Java dependencies in a Grails application?

    - by Stefan Kendall
    I'm trying to adopt my development from Spring/Maven2/Tomcat -> Grails, and I'm wondering if there's an easy way to manage dependencies in grails separate from maven. Maven does a lot of the magic that grails is doing automatically (unit testing/building/etc.), so I wonder if there's a need for maven at all in grails projects. So, then, how do Grails users generally manage java dependencies? I've become accustomed to central repository dependency management, and I can't turn back at this point.

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  • TFS CM resource recommendations / some questions

    - by John
    I am working with a small development shop that consists of a group of 5 developers and 1 QA person. We are using TFS and need to get more sophisticated on how we use this tool. Currently the development team checks in their code each evening. A nightly build runs and pushes the output out on a network share. Our QA person uses this build for testing the next day. Sometimes the build off the trunk codebase has issues/bugs that hinder the QA process, and it hasn’t been a giant issue in the past, but we now want to get to a state where we have our QA person testing on a stable QA build. So I believe we need to create a branch (call it QA), and the developers will continue to develop off the trunk, but the QA person will use builds created from code in the QA branch. Seems simple enough, but we have started doing code reviews as well. So we have another desire in that only code that has been code reviewed can be promoted to the QA branch. Each developer works off a TFS item, and when they check in a changeset, they do it against a TFS item which creates a link between a checked in code file and a TFS item. Eventually the TFS item becomes complete and ready for code review. All code attached to the TFS item is reviewed. How can the versions of these files get promoted to the QA branch? In the QA branch, if a bug is found, we want to fix it in the QA branch and have the changes migrated back to the trunk. I believe TFS has a way to automatically do this doesn’t it? Long story short, we want to get to a build and CM environment that I believe is pretty standard, but we are unaware of how to make this happen with TFS. Given our situation above, can someone point out a book or website(s) that would address our specific needs? We would like to make this happen without having to get too deep in CM theory or TFS. I very much appreciate any and all suggestions! Thanks, John

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  • Blittable Value Types

    - by Michael Covelli
    Here is a list of blittable types. It contains Int32 and Int64. But I don't see just plain "int" on the list. How does C# treat the plain "int" type? Does it just get replaced with Int32 or Int64 depending on the system? Or is there a subtle difference? Will using "int" ever cause a performance hit for marshalling?

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  • Difference between generator expression and generator function

    - by Neil G
    Is there any difference — performance or otherwise — between generator expressions and generator functions? In [1]: def f(): ...: yield from range(4) ...: In [2]: def g(): ...: return (i for i in range(4)) ...: In [3]: f() Out[3]: <generator object f at 0x109902550> In [4]: list(f()) Out[4]: [0, 1, 2, 3] In [5]: list(g()) Out[5]: [0, 1, 2, 3] In [6]: g() Out[6]: <generator object <genexpr> at 0x1099056e0>

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  • Documentation of available Ant tasks for Android?

    - by Janusz
    I just accidentally discovered the ant task for test coverage reports with emma. I'm now looking for a target that only invokes the unit test and generates unit testing output. Is there a list with the available ant targets somewhere, or is it possible to look them up somewhere inside the code of the SDK?

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  • Asynchronous I/O on Mac OS X

    - by stas
    Hi, Meaning the C10K problem, what is the best way to do asynch I/O on Mac OS X (assume to use on Mac and iPhone/iPad)? On Linux our choice is epoll, on Windows is I/O Completion Ports. Top priority is performance and scalability (thousands of connections). Thanks

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  • Mobile Safari 5mb HTML5 application cache limit?

    - by JFH
    It's becoming evident in my testing that there's a 5mb size limit on Mobile Safari's implementation of HTML5's application cache. Does anyone know how to circumvent or raise this? Is there some unexposed meta tag that I should know about? I have to cache some video content for an offline app and 5mb is not going to be enough.

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