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  How expensive is a MySQL query?

Database access speed is always the bottle neck of many applications. Many application have large amount of data to search, retrieve and display nowadays. How do we improve the performance of our applications, how do we reduce the cost of database access? Apart from the design of database, the quality of the query is also one important factor to take care.  But before that, we need to know how much network traffic a query will consume. Yunyang,Zhang from Nubee in Singapore did some research...

   MySQL,Network traffic,Query     2013-04-09 05:13:33

  Breakdown Kubernetes Container Runtime

Keeping on learning Kubernetes piece by piece and having a deeper understanding of its advantages, I am no longer shocked at its rapid development and popularity. Though backed by big companies like Google is undoubtedly the push, its design, features, and convenience are the biggest attraction. Most of all, it disintegrates the monolithic Internet system governance and lifecycle and offers a new management method. Kubernetes is a set of concepts, including various resource types like Pod, Deplo...

   KUBERNETES,CONTAINER     2021-05-15 04:06:48

  Designing Fun

What is “Fun?”“I’ll know it when I see it.”In 1964, in Jacobellis v. Ohio, the US Supreme Court needed to decide whether the state of Ohio could ban a film it called “obscene”—a concept people understood but were hard-pressed to define. Justice Potter Stewart, in his concurring opinion, wrote: “I shall not today attempt further to define the kinds of material I understand to be embraced within that shorthand description; and perhaps I ...

   Design,Fun,Create,Define,Research     2011-09-19 13:35:12

  Erlang Style Concurrency

Introduction On an evolutionary scale of innovation from one to ten (one being Bloomberg and Citi Group, eight being Google and Cirque Du Soleil, and ten being the company you couldn't imagine in your wildest dreams), the company I work for is about a three1. Being employed by this bastion of ingenuity affords me certain opportunities I can't get elsewhere. For example, every developer gets to interview potential...

   Erlang,Concurrency,Lock,Message,Innovation     2012-01-03 10:44:44

  PHP Security

1. IntroductionWriting PHP applications is pretty easy. Most people grasp the syntax rather quickly and will within short time be able to produce a script that works using tutorials, references, books, and help forum forums like the one we have here at PHP Freaks. The problem is that most people forget one of the most important aspects that one must consider when writing PHP applications. Many beginners forget the security aspect of PHP. Generally, your users are nice people, they will...

   PHP,Security,SQL Injection,XSS Cross sit     2011-10-01 02:25:31

  Signs that you're a bad programmer

1. Inability to reason about codeReasoning about code means being able to follow the execution path ("running the program in your head") while knowing what the goal of the code is.SymptomsThe presence of "voodoo code", or code that has no effect on the goal of the program but is diligently maintained anyway (such as initializing variables that are never used, calling functions that are irrelevant to the goal, producing output that is not used, etc.)Executing idempotent functions multiple times (...

   Sign,Programmer,Characteristics,Knowledge,Skill     2011-10-20 08:56:16

  Don’t Call Yourself A Programmer, And Other Career Advice

If there was one course I could add to every engineering education, it wouldn’t involve compilers or gates or time complexity.  It would be Realities Of Your Industry 101, because we don’t teach them and this results in lots of unnecessary pain and suffering.  This post aspires to be README.txt for your career as a young engineer.  The goal is to make you happy, by filling in the gaps in your education regarding how the “real world” actually works.  ...

   Career,Programmer,Advice,Low level,Development     2011-10-29 07:09:23

  A walk through of different ways accessing Kubernetes application

When a web application is deployed on KUbernetes, to access the application, there must be some set up needs to be done so that external users can access the resource within the Kubernetes clusters. IN this post, we will walk through different ways to access application from outside. Before exploring different ways, let's set up a simple nginx eb application which will just serve the nginx welcome message when loading. # deployment.yaml apiVersion: apps/v1 kind: Deployment metadata: name: ngin...

   KUBERNETES,PORT FORWARD,SERVICE,CLUSTERIP,NODEPORT,LOADBALANCER,INGRESS     2021-05-31 00:20:27

  Fix SSL 'alert protocol version' issue while git clone remote repository

Git provides ways to securely connect to remote repository and clone remote repository to local machine. This post will teach you how to fix the "SSL23_GET_SERVER_HELLO:tlsv1 alert protocol version" issue while cloning a remote repository. The issue would look like: If this error occurs, it is most probably caused by out of date git version being used.To improve its security awareness, some weak cryptographic algorithms have been disabled and all git clients should upgrade to latest ones to acc...

   GIT,GIT CLONE,GIT SECURITY     2018-07-08 05:41:39

  How to check a port is taken by which program on Linux

Lots of you may have encountered some error message stating that the port has been taken by another program while trying to start a program on Linux. And you would want to know which program takes the port you want to use. This post will provide some feasible ways to check out which program is taking a specific port. lsof -i:[port] lsof is the command to list open files on Linux. And if you know more about Linux you should get to know everything on Linux is a file even including networ...

   LINUX,PORT,NETSTAT,LSOF     2018-08-12 04:27:57

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