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  What is cache penetration, cache breakdown and cache avalanche?

When designing and developing highly available system, cache is an very important consideration. It is useful to cache some frequently accessed data so that they can be accessed quickly and also cache can protect the downstream system like DB from being hit too often.  To provide better cache design in large systems, some problems may need to be considered first. In this post, we will talk about some frequently discussed cache problems and mitigation plans. Cache penetration Cache penetrati...

   SYSTEM DESIGN,CACHE PENETRATION,CACHE BREAKDOWN,CACHE AVALANCHE     2020-04-10 08:43:00

  Difference between ConcurrentHashMap and Hashtable

Both ConcurrentHashMap and Hashtable are Collection classes for storing key value pairs and they both provide fast element search with a supplied key. They have much in common. However, we will not discuss the similarities between them here, instead we will focus on the differences between them. ConcurrentHashMap and Hashtable are both thread safe. But the mechanism for thread safe is different between them. Hashtable is synchronized, it utilizes the synchronization mechanism; while ConcurrentHa...

   ConcurrentHashMap,Hashtable     2013-11-18 08:06:54

  Designing Great API Docs

Writing documentation is one of those things that is dreaded by many developers. It takes a lot of effort and time to get right. And too often, people take shortcuts. This is sad, because well designed documentation is the key to getting people excited about your project, whether it's open source or a developer focused product. In fact, I argue that the most important piece of UX for a developer product isn't the homepage or the sign up process or the SDK download. It's the API documentati...

   API docs,Design API docs,Advice     2012-03-09 23:15:00

  Maybe we need //Comment comment

Do we need comment in our programs? Depends, if we can write a program which can clearly tell s the reader what the program does, then we had better to avoid unnecessary comments. However, if the program we develop is complex enough and it involves some uncommon logic which needs more explanation, then we have to add comment and make sure the comment we add can correctly tell the readers what we do. The worst scenarios is not you forget or you don't want to add comment, it's that you add comment...

   comment,programming     2014-07-23 04:38:04

  First page of 2012

The tail of 2011 has gone through my heart silently, Year of 2012 is coming with mystery. Looking back to 2011 and looking forward to 2012, it's time to record something...In the past 2011, nothing specials happened in my life. At the beginning of 2011, I was a college student with full of passion, while at the end of 2011, I am an engineer with 5 month's working experience. At the beginning of 2011, I was struggling through my Final Year Project and job hunting, while at the end of 2011, I am p...

   2012,New year,Mayan,Summary     2012-01-01 05:19:32

  The Role of Coding Skills in Advancing Tech Careers

In the fast-changing technical landscape of today, coding is not a unique advantage; it's a basic necessity. From a software engineer to a data analyst or digital marketer, being able to code will greatly expand the opportunities one has for their careers and how effective they can be in their jobs. This essay discusses how coding skills help one's career in the tech field and gives the basic concept of coding: objects, a building block for any modern programming language. 1. Creates Employment ...

   CODING,OOP,OBJECT     2024-05-04 14:27:42

  How to use xargs command in Linux

What is the xargs command? The xargs command constructs and executes commands provided through standard input. It takes input and converts it into command arguments for another command. This functionality is particularly useful in file management and can be combined with commands like rm, cp, mkdir, and others. Using the xargs command When used alone, the xargs command prompts the user to enter a text string and then passes it to the echo command. This example demonstrates the input provided an...

   XARGS,LINUX     2023-11-17 11:19:41

  On Programming Deadlines

There are a lot of differences between programming, and programming professionally. The most notorious of which, is deadlines.DeadlinesWhen you're writing code for yourself, you can spend as much (or as little time) on it as you please--but when you're writing code for other people, you've got only a limited amount of time and resources to get the job done. In my experience, this typically leads to one of two situations:You've got to extend the deadline to finish the job properly.You've got to w...

   Programming,Deadline,Transparent,Test,TODO     2011-11-01 07:10:21

  Advantages Associated with Semantic SEO Searches

Today, all businesses are aware of the fact that SEO is an integral part of their online endeavors. However, some of them do not really know or understand the way SEO works and how things are changing in the SEO landscape. Do you have any idea about some positive effects of SEO and how this specific shift has affected the way people search online and exactly how search results would be ranked? SEO has been there for decades now. However, only since the year 2000 onwards, Google has proactively ...

   ALGORITHM,SEO,SEMANTIC SEO,ADVANTAGEST,HUMMINGBIRD     2018-08-14 01:02:16

  10 things you gotta have to succeed in IT

Takeaway: Everyone seems to agree that IT is a tough field. But what does it take to overcome the adversities and become a successful IT pro? These qualities may be the key. I recently wrote a string of articles discussing various reasons to leave IT — and various alternative careers for dissatisfied IT workers. I received an amazing amount of feedback from readers who have always wanted to express similar sentiments. But that leaves out a huge swath of peo...

   Tips,IT,Development     2011-07-21 21:55:13

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