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  How to check which Ohai plugin hangs in chef client run

Ohai plugins are very important components in chef client which aims to provide resource management automation on a server. The data discovered by Ohai plugins are describing the current state of the server and they will be used to maintain the server in a desired state. Each Ohai plugin discovers a specific pierce of information about the server such as cpu, memory, middleware etc. However, there are rare occasions(well I am a bit optimistic here) someone may find that the chef client...

   HOW TO,CHEF-CLIENT,OHAI,UPTIME,HANG     2017-12-24 22:09:59

  An easy way to log client side information to server

JavaScript debug is a very troublesome thing in web application development. Because many web browsers will not notify you if there is any error in the JavaScript codes you write. They just silently fail and block the following codes execution. In order to debug JavaScript codes, we need a good log mechanism which will help us log the error information,, we often need to log errors in JavaScript codes to server for debug purpose in a production web application, What should we do? The first ...

   JavaScript log, Ajax,Image,Debug     2012-12-30 09:16:50

  Why do so many technical recruiters suck?

It’s Tuesday, I get a call from an unknown number.  There is a little hesitation, but I finally pick it up.  My number is listed on my business card and I feel like I should get these calls unless I am in a meeting.- Hi, is this Mike?- Yes, speaking….- Hi Mike!  How are you today?- Fine…- I am calling from XYZ Co, and we deal with recruiting and staff augmentation.  I was wondering if you are looking for software developers.We are in San Francisco and itââ...

   Recruitment,HR,Sucks,Tech recruiter     2011-11-13 08:22:02

  Do designers need code?

So many problems in software occur because programmers and designers don't communicate well all the time. Why don't more designers learn to code themselves or have engineers build abstractions better suited to them? People's minds work in different ways, they can process thoughts differently, solve problems in completely different but equally valid ways. It's a mistake to assume everyone should possess the same skill set.  Also not everyone should be a full stack engineer although full stac...

   Design,Coding     2014-01-07 06:22:52

  Wow: Intel unveils 1 teraflop chip with 50-plus cores

I thought the prospect of quad-core tablet computers was exciting.Then I saw Intel's latest -- a 1 teraflop chip, with more than 50 cores, that Intel unveiled today, running it on a test machine at the SC11 supercomputing conference in Seattle.That means my kids may take a teraflop laptop to college -- if their grades don't suffer too much having access to 50-core video game consoles.It wasn't that long ago that Intel was boasting about the first supercomputer with sustained 1 teraflop performan...

   Intel,Chip,Multi-core,teraflop     2011-11-16 08:15:39

  CASSANDRA data model

Cassandra is an open source distributed database, it combines dynamic key/value and column oriented feature of Bigtable. Features of Cassandra are: Flexible schema, no need to design schema first, it's very convenient to add or delete strings Support range search on keys High usability, extensible. The single node error will not affect the cluster. We can think Cassandra's data model as a 4 or 5 dimensional Hash. COLUMN Columns is the smallest data unit in Cassandra, it is a 3 dimensional data...

   Cassandra,database,sort     2013-06-08 22:07:40

  What Happened to Software Engineering?

Over the past few years there has been an evolutionary shift in the world of software development.  Not very long ago, the dominant Software Development Life Cycle (SDLC) methodology was the Waterfall Method with very specific phases that separated the construction phase from phases like design and test. The software development industry, still very new, was striving to find a repeatable, predictable process for developing software.  The best model for this seemed to be the physical sc...

   Software engineering,Software,Developmen     2011-09-07 10:42:34

  Tips to improve JavaScript efficiency

Writing JavaScript code is tedious and error prone. You not only need to implement the necessary functions, but also need to ensure cross browser compatibility. This often causes the low efficiency of JavaScript developers. Here we recommend 12 tips you can benefit from. 1. Remove array element by index If we want to remove one element in an array, we can use splice. function removeByIndex(arr, index) { arr.splice(index, 1); } test = new Array(); test[0] = ’Apple’; test[1] = &rsq...

   JavaScript,Tips,Array     2013-07-27 20:50:40

  Essential skills any web developer should have

As a web developer, besides writing HTML code, there is much more to do before the site can go live. You may consider about user experience, device compatibility, security etc. To be a good web developer, you should acquire some essential skills for web development. Below we list some of them. Some of them you may be familiar with a long time ago, but definitely some of them you may not be so familiar with or even never hear about before. Interface and User Experience Be aware that browsers imp...

   Web development,User experience     2014-03-21 06:44:49

  Install and setup Kafka on Windows

Kafka has become a very popular distributed message delivery service which decouples different services while making message delivery between service easy, fast and reliable. In this post, we will walk through how to install and set up Kafka on Windows. Pre-requisite Java Apache ZooKeeper Installation Go to Kafka's download link and download the latest stable release, we downloaded 2.2.0 as of this writing. After downloading, copy the installation file to some folder and unzip it.  Sinc...

   KAFKA,STREAM,USER GUIDE     2019-06-01 02:12:07

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