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  • redirect user, then log his visit using php and mysql

    - by Bart van Heukelom
    I have a PHP redirect page to track clicks on links. Basically it does: - get url from $_GET - connect to database - create row for url, or update with 1 hit if it exists - redirect browser to url using Location: header I was wondering if it's possible to send the redirect to the client first, so it can get on with it's job, and then log the click. Would simply switching things around work?

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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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  • Bash edit file and keep last 500 lines

    - by Lizard
    I am looking to create a cron job that opens a directory loops through all the logs i have created and deletes all lines but keep the last 500 for example. I was thinking of something along the lines of tail -n 500 filename > filename Would this work? I also not sure how to loop through a directory in bash Thanks in advance.

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  • one high-end server with one Application Server or multiple Application Servers?

    - by elgcom
    If I have a high-end server, for example with 1T memory and 8x4core CPU... will it bring more performance if I run multiple App Server (on different JVM) rather than just one App Server? On App Server I will run some services (EAR whith message driven beans) which exchange message with each other. btw, has java 64bit now no memory limitation any more? http://java.sun.com/products/hotspot/whitepaper.html#64

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  • MVVM Light with ASP.Net MVC ?

    - by Hasan
    Hello, I'm a big fan of MVVM Light and I use it in my WPF Application. It works Greeeeat. I have a new project in asp.net mvc. And I'm wondering : Is anyone already tried to use mvvm light and asp.net mvc ? I know that some components will obviously not work but maybe, someone has achieved to do a better job with it. Thanks for your feedback :) Hasan

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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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  • CDNs and domains

    - by Martind
    Hi all! A lot of big websites (facebook etc) are settings up CDN's for their content. Now I notice, that these CDN's are not always on the original domain. Example: Facebook pictures are on "photos-a.ak.fbcdn.net" Why is that? Is there a performance-gain in not having lots of subdomains on the "primary" domain (facebook.com)

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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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  • ruby on rails - ultrasphinx

    - by satya
    Ruby on Rails - UltraSphinx Hi guys, I'm using Ultrasphinx for the search thing. My question is : I have the "rake ultrasphinx:daemon:start" running in the background. Now, should I have a cron job that does "rake ultrasphinx:index" regularly or will the daemon take care of indexing whenever a new object is created. Please, let me know. Its kind of emergency. Thanks

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  • realtime diagnostics

    - by Ion Todirel
    I have an application which has a loop, part of a "Scheduler", which runs at all time and is the heart of the application. Pretty much like a game loop, just that my application is a WPF application and it's not a game. Naturally the application does logging at many points, but the Scheduler does some sensitive monitoring, and sometimes it's impossible just from the logs to tell what may have gotten wrong (and by wrong I don't mean exceptions) or the current status. Because Scheduler's inner loop runs at short intervals, you can't do file I/O-based logging (or using the Event Viewer) in there. First, you need to watch it in real-time, and secondly the log file would grow in size very fast. So I was thinking of ways to show this data to the user in the realtime, some things I considered: Display the data in realtime in the UI Use AllocConsole/WriteConsole to display this information in a console Use a different console application which would display this information, communicate between the Scheduler and the console app using pipes or other IPC techniques Use Windows' Performance Monitor and somehow feed it with this information ETW Displaying in the UI would have its issues. First it doesn't integrate with the UI I had in mind for my application, and I don't want to complicate the UI just for this. This diagnostics would only happen rarely. Secondly, there is going to be some non-trivial data protection, as the Scheduler has it's own thread. A separate console window would work probably, but I'm still worried if it's not too much threshold. Allocating my own console, as this is a windows app, would probably be better than a different console application (3), as I don't need to worry about IPC communication, and non-blocking communication. However a user could close the console I allocated, and it would be problematic in that case. With a separate process you don't have to worry about it. Assuming there is an API for Performance Monitor, it wouldn't be integrated too well with my app or apparent to the users. Using ETW also doesn't solve anything, just a random idea, I still need to display this information somehow. What others think, would there be other ways I missed?

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  • A/B testing on App Engine?

    - by Silver Dragon
    What would be the simplest implementation of an A/B testing system running on App engine? I'm especially keen towards performance implications of using Datastore for back-end (with looong query times), and database design.

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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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  • How to give CSS3 support to IE?

    - by metal-gear-solid
    I use IE7.js but it doesn't have CSS3 support. I use jQuery always in my projects. What is the best lightweight way to give all CSS3 selectors and properties support to IE 6,7,8? I'm not asking for HTML5 support only asking to give CSS3 support in as much as light on performance way.

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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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  • 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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  • background-fu pluggin unable to run ./script/generate background

    - by Viola
    I'm following this rdoc: http://rdoc.info/projects/ncr/background-fu and can't run ./script/generate background after installing background-fu as a Rails plugin: ./script/plugin install git://github.com/ncr/background-fu.git I'm getting following error: Library/Ruby/Site/1.8/rubygems/custom_require.rb:31:in `gem_original_require': no such file to load -- job (MissingSourceFile) Am I missing something?

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  • Use Of Android NDK

    - by Shalini Singh
    Hi!!!! i am new for NDK. i want to know what is the benefit of native code in android . By this can we improve our application performance. and main thing exactly when we will use this native code. please clear it. and from where i can get more information............

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  • MS-Access to SQL Server 2000 problem with datetime

    - by 0plus1
    I'm trying to transfer some data from Access to SQL Server 2000 (there are no other way to do this sadly), I'm using Access to mssql to do the job. The program fails everytime it finds a datetime in this fashion: 03/07/2009 10.17.00 While it imports date like this: 29/12/2008 I don't understand where this problem come from so I ask you for your help. Thank you very much.

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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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  • how can I prevent my SESSION to be overwritten on pageLoad of my MasterPage

    - by Darkyo
    I'm new to asp world, and I have to keep my new job :) Switching form php to asp.net 3.5 (never used before). What would be the best practice for storing a SESSION variable in my project ? How can I prevent my SESSION to be overwritten if my initialisation code is in the onPageLoad method of my MasterPage ? My variables keeps beeing overwritten, please someone help me and tell me if there is any other solution than dealing with this pageLoad problem. Thank you all

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