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  A journey to investigate a goroutine leakage case

In Go, creating goroutines is straightforward, but improper usage may result in a large number of goroutines unable to terminate, leading to resource leakage and memory leaks over time. The key to avoiding goroutine leaks is to manage the lifecycle of goroutines properly. By exporting runtime metrics and utilizing pprof, one can detect and resolve goroutine leakage issues. This post will go through one real case encountered by the author. The author maintains a service that connects to a targe...

   TIMEOUT,SSH,GUIDE,DEBUG,LEAK,GOROUTINE,PPROF,GOLANG     2024-03-16 11:00:23

  10 tools to make your shell script more powerful

Many people mistakenly think that shell scripts can only be run in command line. In fact shell can also call some GUI components such as menus,alert dialogs, progress bar etc. You can control the final output, cursor position and various output effects. Here we introduce some tools which can help you create powerful, interactive and user friendly Unix/Linux shell scripts. 1. notify-send This command can let you inform the process to send a desktop notification to users. This can be used to send ...

   shell,GUI,zenity     2013-04-05 08:50:41

  Peculiarities of cloud infrastructure

MarketsandMarkets claims that the cloud computing market is worth more than $545 bln nowadays. Moreover, by Thales, nearly 60% of worldwide commercial data is stored in the cloud today. Nay, under Exploding Topics, about 90% of large companies across the world use cloud infrastructure. So, the mentioned technology is incredibly popular among business owners worldwide presently. However, not so many company holders, as well as managers, know enough about the specified solutions. That's because mo...

   CLOUD INFRASTRUCTURE,DATA STORAGE     2022-12-30 12:00:44

  Google feels the threat from Samsung

In response to Apple's iOS system, Google and Samsung stood on the same side. But with the increase of market share of Samsung Android devices, Google begins to feel the threat from Samsung.On MWC in Barcelona, a group of business executives said Google increasingly worried about Samsung after a private party. Because its equipment has occupied 40% of the Android devices, which could erode the Google advertising service. Google hopes manufacturers such as HTC and HP can challenge Samsung.It is r...

   Google,Samsung,Android     2013-02-27 21:12:17

  Build route graph of Hurricane Sandy

Hurricane Sandy swept US east side and landed in New York, it killed 113 persons and incurred 50 billion US dollars economic loss. Sandy is also considered as the most expensive hurricane. We will now use matplotlib and basemap libraries in Python to build a route graph of Sandy. Below is the animated GIF. Shadow is added in the graph to show the time at night, we can see from the graph that Sandy stayed a while in Panama after emerging, then it went through Cuba and became Hurricane-2. Late...

   Hurricane Sandy,Route graph,Python     2012-11-17 07:58:13

  Memory related exception analysis in Java

Java Virtual Machine Specification divides the memory of JVM into several areas : Heap, Stack, The Program Counter register and Method area etc. In HotSpot JVM, heap is composed of Young, Tenured and Perm. There are different OutOfMemory error can happen in different memory area. Next is an overview of some of these OOM errors. StackOverflowError The JVM will allow only a specified number of stacks created nested. An JVM option -Xss can be set to determine the maximum stack size. If the num...

   Java, Memory model, Memory exception, OOM     2015-01-19 06:54:27

  Samsung announces Galaxy Note II

Samsung announced Galaxy Note II in today's Mobile Unpacked conference. It has been one year since the first generation of Galaxy Note released in October last year.Galaxy Note â…¡ is not lighter, but a little thinner compared to Galaxy Note I. It is equipped with Android 4.1 Jelly Bean with a 5.5-inch screen. Detailed parameters are as follows: 1.6GHz quad-core Exynos processor 5.5 inches HD Super AMOLED screen, 1280 x 720 (16:9) 8 megapixel rear camera, 1.9 megapixel front camera 2G RAM,...

   Samsung,Galaxy Note II,Parameters,Price     2012-08-29 20:01:08

  Time Warner invests on Maker Studios

According to ATD, the start-up Maker Studios which specializes in the creation and distribution of YouTube video clips, will get a $40 million investment from investors where media giant Time Warmer is the lead investor.Maker Studios is an video clip creation and distribution of start-up headquartered in Los Angeles. According to its website, this media company's mission is to act as a bridge between YouTube and TV institutions. The program subscribers on YouTube over 80 million, over one billi...

   Maker Studios, video subscription,YouTube     2012-11-21 12:20:19

  The Greatest Regex Trick Ever (Simplified)

There is a post which is really hot recently which showcased a best ever regular expression trick. In this post, it provides a trick which can be adapted to situations where one wants to match some patterns desired and exclude the patterns undesired. In simple, the trick is : Pattern not desired | (Pattern desired) Then taking the group 1 match of the capturing group of matched. This group will contain the strings matching the desired patterns. Have to say this trick is really neat and brilliant...

   REGULAR EXPRESSION,PROGRAMMING,JAVA     2015-10-01 21:59:05

  Emotion analysis on Twitter for past 5 years

Emotion analysis is a new research direction in computer science in these years, what it does is expressing emotions and feelings of people with data. The means to do emotion analysis include natural language processing, statistical and signal processing. The platforms which are most suitable for emotion analysis are also microblogging like social networking platform, Twitter is one good example.Computing Laboratory of the University of Vermont project Hedonometer conducted emotion analysis for...

   Emotion analysisTwitter,Hedonometer,happiness     2013-05-08 06:17:25

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