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  • Php efficiency question --> Database call vs. File Write vs. Calling C++ executable

    - by JP19
    Hi, What I wish to achieve is - log all information about each and every visit to every page ofmy website (like ip address, browser, referring page, etc). Now this is easy to do. What I am interested is doing this in a way so as to cause minimum overhead (runtime) in the php scripts. What is the best approach for this efficiency-wise: 1) Log all information to a database table 2) Write to a file (from php directly) 3) Call a C++ executable, that will write this info to a file in parallel [so the script can continue execution without waiting for the file write to occur ...... is this even possible] I may be trying to optimize unnecessarily/prematurely, but still - any thoughts / ideas on this would be appreciated. (I think efficiency of file write/logging can really be a concern if I have say 100 visits per minute...) Thanks & Regards, JP

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  • Oracle Exadata???????????????????

    - by takashi.hitomi
    2010?6????????????????????Oracle Exadata??????????????! ???????Oracle Exadata?????? ?????????2010 ???????????????????????????????????????????????????? ??????????????????????????????????????????????????????????????????????????????????? Oracle?Smart Grid????????Oracle Exadata??????????????????????????? ?21? ??·?????????? ????????????????? ????????????????????????????????????????????????????????????·?·????????????????????????????????????????????? ?????????????????????????????????????????????????????? ????????Oracle Exadata?????????????Oracle Database????????·?????????????? ?????????Update?Get?? Oracle Cloud Computing Summit ~ Database & Exadata Day ~ Oracle Cloud Computing Summit??????1? ????·??????????Oracle????????????????????????? ?????????·?????????????????????????????????·??????????????????????????????????????

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  • How do you design a database to allow fast multicolumn searching?

    - by Fletcher Moore
    I am creating a real estate search from RETS data, but this is a general question. When you have a variety of columns that you would like the user to be able to filter their search result by, how do you optimize this? For example, http://www.charlestonrealestateguide.com/listings.php has 16 or so optional filters. Granted, he only has up to 11,000 entries (I have the same data), but I don't imagine the search is performed with just a giant WHERE AND AND AND ... clause. Or is this typically accomplished with one giant multicolumn index? Newegg, Amazon, and countless others also have cool & fast filtering systems for large amounts of data. How do they do it? And is there a database optimization reason for the tendency to provide ranges instead of empty inputs, or is that merely for user convenience?

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  • Registration Now Open: Virtual Developer Day, North America, APAC & Europe

    - by Tanu Sood
    Is your organization looking at developing Web or Mobile application based upon the Oracle platform?  Oracle is offering a virtual event for Developer Leads, Managers and Architects to learn more about developing Web, Mobile and beyond based on Oracle applications. This event will provide sessions that range from introductory overviews to technical deep dives covering Oracle's strategic framework for developing multi-channel enterprise applications for the Oracle platforms. Multiple tracks cover every interest and every level and include live online Q&A chats with Oracle's technical staff. For registration and information on Vortual Developer Day: Oracle ADF Development, please follow the link HERE Sign up for one of the following events below: Americas - Tuesday - November 19th / 9am to 1pm PDT / 12pm to 4pm EDT / 1pm to 5pm BRT APAC - Thursday - November 21st / 10am - 1:30pm IST (India) / 12:30pm - 4pm SGT (Singapore) / 3:30pm -7pm AESDT EMEA - Tuesday - November 26th / 9am - 1pm GMT / 1pm - 5pm GST / 2:30pm -6:30pm IST And for those interested in Cloud Application Foundation, including Weblogic and Coherence, don't forget to sign up for the following events: Americas - Tuesday, November 5, 2013 - 9 am - 1 pm PDT/ 12 pm - 4 pm EDT/ 1 pm - 5 pm BRT EMEA - December 3, 2013 - 9 a, - 1 pm GMT/ 1pm - 5pm GST/ 2:30 pm - 6:30 pm ISTThe event will guide you through tooling updates and best practices around developing applications with WebLogic and Coherence as target platforms.

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  • SIMD Extensions for the Database Storage Engine

    - by jchang
    For the last 15 years, Intel and AMD have been progressively adding special purpose extensions to their processor architectures. The extensions mostly pertain to vector operations with Single Instruction, Multiple Data (SIMD) concept. The motivation was that achieving significant performance improvement over each successive generation for the general purpose elements had become extraordinarily difficult. On the other hand, SIMD performance could be significantly improved with special purpose registers...(read more)

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  • How to structure (normalize?) a database of physical parameters?

    - by Arrieta
    Hello: I have a collection of physical parameters associated with different items. For example: Item, p1, p2, p3 a, 1, 2, 3 b, 4, 5, 6 [...] where px stands for parameter x. I could go ahead and store the database exactly as presented; the schema would be CREATE TABLE t1 (item TEXT PRIMARY KEY, p1 FLOAT, p2 FLOAT, p3 FLOAT); I could retrieve the parameter p1 for all the items with the statement: SELECT p1 FROM t1; A second alternative is to have an schema like: CREATE TABLE t1 (id INT PRIMARY KEY, item TEXT, par TEXT, val FLOAT) This seems much simpler if you have many parameters (as I do). However, the parameter retrieval seems very awkward: SELECT val FROM t1 WHERE par == 'p1' What do you advice? Should go for the "pivoted" (first) version or the id, par, val (second) version? Many thanks.

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  • Open screen and run some projects and applications

    - by trex
    I am a python web developer, I need to run my local 3-4 django projects in screen sessions and need to launch some of my applications like skype, chrome, eclipse and a text file daily status.txt. Is there any way to write a script to launch all of them by running a shell script only? #!/bin/bash # gnome-terminal -e "screen -dmS myapps" #(Attach following command to one of the screen) cd /var/opt/project1 python manage.py runserver 127.0.0.1:8001 #(Attach another command to one of the screen) cd /var/opt/project2 python manage.py runserver 127.0.0.1:8002 #(Attach another command to one of the screen) cd /var/opt/project3 python manage.py runserver 127.0.0.1:8003 #start my applications eclipse skype gedit "/home/myname/Desktop/daily status.txt" [...] Can one help me to write a shell script to do this.

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  • Detect Open Space in Farseer

    - by Tom G
    I'm working on a 2D platformer using XNA and Farseer. I would like the player's character to be able to grab and climb up ledges. Detecting a collision between the player and the side of a wall is simple enough with the OnCollision delegate, but I have to admit I'm a bit stumped on how to detect that there's enough clearance for the PC to mount the ledge. Essentially, I want to ensure there's an appropriately sized rectangle above and to the left or right of the PC (depending on their direction) and I'm not sure how I would check for such a space. Any suggestions on how to determine there is nothing in the simulated world within some bounding rectangle?

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  • Connect to a MySQL database and count the number of rows.

    - by Hugo
    Hi there! I need to connect to a MySQL database and then show the number of rows. This is what I've got so far; <?php include "connect.php"; db_connect(); $result = mysql_query("SELECT * FROM hacker"); $num_rows = mysql_num_rows($result); echo $num_rows; ?> When I use that code I end up with this error; Warning: mysql_num_rows(): supplied argument is not a valid MySQL result resource in C:\Documents and Settings\username\Desktop\xammp\htdocs\news2\results.php on line 10 Thanks in advance :D

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  • Database table design vs. ease of use.

    - by Gastoni
    I have a table with 3 fields: color, fruit, date. I can pick 1 fruit and 1 color, but I can do this only once each day. examples: red, apple, monday red, mango, monday blue, apple, monday blue, mango, monday red, apple, tuesday The two ways in which I could build the table are: 1.- To have color, fruit and date be a composite primary key (PK). This makes it easy to insert data into the table because all the validation needed is done by the database. PK color PK fruit PK date 2.- Have and id column set as PK and then all the other fields. Many say thats the way it should be, because composite PKs are evil. For example, CakePHP does no support them. PK id color fruit date Both have advantages. Which would be the 'better' approach?

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  • Open GL polygons not displaying

    - by Darestium
    I have tried to follow nehe's opengl tutorial lesson 2. I use sfml for my window creation. The problem I have is that both the triangle and the quad don't show up on the screen: #include <SFML/System.hpp> #include <SFML/Window.hpp> #include <iostream> void processEvents(sf::Window *app); void processInput(sf::Window *app, const sf::Input &input); void renderCube(sf::Window *app, sf::Clock *clock); void renderGlScene(sf::Window *app); void init(); int main() { sf::Window app(sf::VideoMode(800, 600, 32), "Nehe Lesson 2"); app.UseVerticalSync(false); init(); while (app.IsOpened()) { processEvents(&app); renderGlScene(&app); app.Display(); } return EXIT_SUCCESS; } void init() { glClearDepth(1.f); glClearColor(0.f, 0.f, 0.f, 0.f); // Enable z-buffer and read and write glEnable(GL_DEPTH_TEST); glDepthMask(GL_TRUE); // Setup a perpective projection glMatrixMode(GL_MODELVIEW); glLoadIdentity(); gluPerspective(45.f, 1.f, 1.f, 500.f); glShadeModel(GL_SMOOTH); } void processEvents(sf::Window *app) { sf::Event event; while (app->GetEvent(event)) { if (event.Type == sf::Event::Closed) { app->Close(); } if (event.Type == sf::Event::KeyPressed && event.Key.Code == sf::Key::Escape) { app->Close(); } } } void renderGlScene(sf::Window *app) { app->SetActive(); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // Clear the screen and the depth buffer glLoadIdentity(); // Reset the view glTranslatef(-1.5f, 0.0f, -6.0f); // Move Left 1.5 units and into the screen 6.0 glBegin(GL_TRIANGLES); glVertex3f( 0.0f, 1.0f, 0.0f); // Top glVertex3f(-1.0,-1.0f, 0.0f); // Bottom Left glVertex3f( 1.0f,-1.0f, 0.0f); // Bottom Right glEnd(); glTranslatef(3.0f, 0.0f, 0.0f); glBegin(GL_QUADS); // Draw a quad glVertex3f(-1.0f, 1.0f, 0.0f); glVertex3f( 1.0f, 1.0f, 0.0f); glVertex3f( 1.0f,-1.0f, 0.0f); glVertex3f(-1.0f,-1.0f, 0.0f); glEnd(); } I would greatly appreciate it if someone could help me resolve my issue.

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  • Identifying Incompatibility Issues When Migrating SQL Server Database to Windows Azure

    In this article, Marcin Policht looks at migrating existing SQL Server databases to Windows Azure, starting with identifying obstacles associated with such migrations. Optimize SQL Server performance“With SQL Monitor, we can be proactive in our optimization process, instead of waiting until a customer reports a problem,” John Trumbul, Sr. Software Engineer. Optimize your servers with a free trial.

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  • Behind the open codec FUD attack

    <b>ZDNet:</b> "The FUD attack launched against Ogg Theora and VP8, the very idea that they violate patents, is not aimed at the courts, but at the W3C, which held a conference on the coming HTML5 standards last week in Raleigh."

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  • Storing hierarchical template into a database

    - by pduersteler
    If this title is ambiguous, feel free to change it, I don't know how to put this in a one-liner. Example: Let's assume you have a html template which contains some custom tags, like <text_field />. We now create a page based on a template containing more of those custom tags. When a user wants to edit the page, he sees a text field. he can input things and save it. This looks fairly easy to set up. You either have something like a template_positions table which stores the content of those fields. Case: I now have a bit of a blockade keeping things as simple as possible. Assume you have the same tag given in your example, and additionally, <layout> and <repeat> tags. Here's an example how they should be used: <repeat> <layout name="image-left"> <image /> <text_field /> </layout> <layout name="image-right"> <text_field /> <image /> </layout> </repeat> We now have a block which can be repeated, obviously. This means: when creting/editing a page containing such a template block, I can choose between a layout image-left and image-right which then gets inserted as content element (where content for <image /> and <text_field /> gets stored). And because this is inside a <repeat>, content elements from the given layouts can be inserted multiple times. How do you store this? Simply said, this could be stored with the same setup I've wrote in the example above, I just need to add a parent_id or something similiar to maintain a hierarchy. but I think I am missing something. At least the relation between an inserted content element and the origin/insertion point is missing. And what happens when I update the template file? Do I have to give every custom tag that acts as editable part of a template an identifier that matches an identifier in the template to substitue them correctly? Or can you think of a clean solution that might be better?

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  • Recovering SQL Server 2008 Database From Error 2008

    MS SQL Server 2008 is the latest version of SQL Sever. It has been designed with the SQL Server Always On technologies that minimize the downtime and maintain appropriate levels of application availa... [Author: Mark Willium - Computers and Internet - May 13, 2010]

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  • Trouble Setting up Open SSH with Putty

    - by warpstack
    I for the life of me can't seem to get openSSH to work on Ubuntu Server 10.10 with keys I generated in PuttyGen on my Windows machine. After hours of trial and error and web searches I can't get my ssh service to accept my private key! Here is my sshd_config. I generated my public and private keys using Putty in Windows then used a ssh connection to paste my key from putty directly into my authorized_keys2 file located in */etc/ssh/publickeys/authorized_keys2* The authorized_keys2 file looks something like: ssh-rsa AAAAB3NzaC1yc2EAAAA... with no email or anything at the end of it. I just pasted it straight from PuttyGen without using a key comment. I feel like it's not working because of some nuance I am not understanding or some unusual setting or incompatibility. I've restarted the ssh service (and the machine) to no avail. What are some common pitfalls I might have gotten myself into? Is there a simpler way to generate ssh keys that putty can use in windows?

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  • Best database setup for one click games

    - by ewizard
    I am building a one click game website/mobile app, and I am debating between using MySQL and MongoDB for the backend. The way I have been exploring it is with a NodeJS/Express/Angular/Passport/MongoDB stack - I have also implemented Socket.io. I have gotten to the point where I am sending data from the flash game to the server (NodeJS). The only data that needs to be sent is basic user information, the players score at the end of each game, and some x,y positions for each players game (for anti-cheating). It seems like MySQL would work fine, but as I am already using MongoDB - are there any major drawbacks to continuing to work with MongoDB on this project?

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