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  A Quick Look at the Services Offered by RDBMs vs. NoSQL

The world of IT has to deal with the issue of data storage. The reason for this is that there is plenty of data produced and created daily on the internet and on various business applications. In the past, RDBMs or Relational Database Management Systems were used for storage. Even though they are still used today, there are other offerings that present competition and anyone wishing to purchase data storage systems needs to make comparisons.  One such competing system is NoSQL or Not Only ...

   NOSQL,DATABASE,RDMS,DATABASE SUPPORT     2015-11-06 04:52:54

  Why does LinkedIn migrate to NodeJS from Ruby?

Node.js, the server-side JavaScript-based software platform used to build scalable network applications, has been all the rage among many developers for the past couple of years. Node.js uses an event-driven, non-blocking I/O model that makes it lightweight and efficient, perfect for data-intensive real-time applications that run across distributed devices. Because of these advantages, there are many websites are migrating to Node.js.One of them is LinkedIn. LinkedIn was initially built on Ruby...

   LinkedIn,NodeJS,Ruby     2014-03-21 23:39:25

  How Kafka achieves high throughput low latency

Kafka is a message streaming system with high throughput and low latency. It is widely adopted in lots of big companies. A well configured Kafka cluster can achieve super high throughput with millions of concurrent writes. How Kafka can achieve this? This post will try to explain some technologies used by Kafka. Page cache + Disk sequential write Every time when Kafka receives a record, it will write it to disk file eventually. But if it writes to disk every time it receives a record, it would ...

   BIG DATA,KAFKA     2019-03-08 09:42:57

  The Power of Efficiency: 10 Practical Energy-Saving Tips for Tech Startups

In today's fast-paced world, where technology reigns supreme, energy consumption is a significant concern for tech startups. Not only does excessive energy usage contribute to environmental degradation, but it also adds up to substantial operational costs. However, the good news is that there are plenty of practical steps that tech companies can take to reduce their energy footprint without compromising productivity or innovation. In this guide, we'll explore ten actionable tips that can help te...

   STARTUP,ENERGY,ENVIRONMENT,RENEWABLE ENERGY     2024-03-03 03:07:04

  Be cautious before deciding to use ReactJS in your product

ReactJS is an open source JavaScript library used for writing user interfaces. It revamps the way developers write web applications. More and more front end developers start to use this Facebook crafted library in their products or projects nowadays. However, although ReactJS is an open source library under BSD license, it doesn't mean there is no risk to freely adopts it in your products. If you are building or plain to build some products which may compete with Facebook or its subsid...

   JAVASCRIPT,FACEBOOK,REACTJS,VUE     2016-07-16 20:43:16

  Understand Virtual DOM

With the popularity of React, the internals and implementation of Virtual DOM has becoming top discussed topic in tech communities and interviews. This post will give an introduction of Virtual DOM and how to implement a simple Virtual DOM logic. How to understand Virtual DOM In early days, front end developers would update a webpage view based on the data status change(usually after making AJAX call). But it brings performance penalties when there is frequent update as it would cause page reflo...

   JAVASCRIPT,DOM,VIRTUAL DOM     2019-12-07 23:43:04

  What to put on whiteboard during an interview

As a programmer, you may go through different kinds of programming tests while interviewing for jobs. The most famous and difficult one may be the whiteboard test for lots of people. Usually the interviewer will give the candidate an algorithm problem or case study and ask the candidate to implement the algorithm with his/her favorite programming language. The code to be written is not too much but it requires the candidate to thoroughly consider different edge cases. So wha...

   TIPS,INTERVIEW,WHITEBOARD TEST     2014-08-29 20:34:52

  /dev/null and /dev/tty in Linux

In Linux, there are two special files /dev/null and /dev/tty. /dev/null will drop all the data written to it, i.e, when program writes data to this file, it means the program has completed the data write operation. But in  fact it does nothing, if you just want the status of a command but not the output of a command, this feature will be very useful. See below shell codes:     /> vi test_dev_null.sh        #!/bin/bash    if grep...

   Linux,/dev/null,/dev/tty     2013-03-04 02:23:23

  Will Weibo's IPO be a success?

The Chinese version of Twitter -- Weibo is going to launch its IPO today on NASDAQ. The stock code is "WB" and its target price per share is set to $17. The total funds it's going to raise is around $328.44 million. Weibo claims it's the first Chinese SNS media to be listed on NASDAQ. Goldman Sachs and Credit Suisse are the joint lead underwriter of the IPO. They have gained one option from Weibo for validity of 30 days to buy 2.52 million shares of ADS. One interesting thing is Goldman Sachs ...

   Weibo,NASDAQ,IPO     2014-04-17 07:33:42

  A Sip of Go Log

Logging is indispensable in any code that we need its support both in debugging and in statistics. However, a package that filled withfmt.Println/fmt.Printf printing various messages can never be considered a read-to-be-adopted package, which can be optimized by a simple change, using Golang’s native log package to print information to standard output or to a file. Then, how to apply the log package? Are there any limitations? If so, can we seek open-source packages? Let&rsq...

   GOLANG,LOGGING     2022-06-16 05:43:24

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